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-rw-r--r--tests/assembly/stack-protector/stack-protector-heuristics-effect.rs3
-rw-r--r--tests/codegen/issue-97217.rs22
-rw-r--r--tests/codegen/simd/simd-wide-sum.rs26
-rw-r--r--tests/codegen/unwind-landingpad-cold.rs16
-rw-r--r--tests/codegen/unwind-landingpad-inline.rs39
-rw-r--r--tests/coverage-map/status-quo/async.cov-map90
-rw-r--r--tests/coverage-map/status-quo/async2.cov-map28
-rw-r--r--tests/coverage-map/status-quo/closure.cov-map185
-rw-r--r--tests/coverage-map/status-quo/closure_bug.cov-map125
-rw-r--r--tests/coverage-map/status-quo/closure_macro.cov-map22
-rw-r--r--tests/coverage-map/status-quo/closure_macro_async.cov-map22
-rw-r--r--tests/coverage-map/status-quo/conditions.cov-map338
-rw-r--r--tests/coverage-map/status-quo/continue.cov-map74
-rw-r--r--tests/coverage-map/status-quo/dead_code.cov-map8
-rw-r--r--tests/coverage-map/status-quo/generator.cov-map39
-rw-r--r--tests/coverage-map/status-quo/inline-dead.cov-map12
-rw-r--r--tests/coverage-map/status-quo/inline.cov-map26
-rw-r--r--tests/coverage-map/status-quo/issue-93054.cov-map8
-rw-r--r--tests/coverage-map/status-quo/lazy_boolean.cov-map372
-rw-r--r--tests/coverage-map/status-quo/loops_branches.cov-map218
-rw-r--r--tests/coverage-map/status-quo/no_cov_crate.cov-map4
-rw-r--r--tests/coverage-map/status-quo/partial_eq.cov-map12
-rw-r--r--tests/coverage-map/status-quo/simple_loop.cov-map23
-rw-r--r--tests/coverage-map/status-quo/simple_match.cov-map31
-rw-r--r--tests/coverage-map/status-quo/test_harness.cov-map4
-rw-r--r--tests/coverage-map/status-quo/try_error_result.cov-map166
-rw-r--r--tests/coverage-map/status-quo/unused.cov-map16
-rw-r--r--tests/coverage-map/status-quo/yield.cov-map62
-rw-r--r--tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-abort.diff2
-rw-r--r--tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-unwind.diff2
-rw-r--r--tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-abort.diff2
-rw-r--r--tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-unwind.diff2
-rw-r--r--tests/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir4
-rw-r--r--tests/mir-opt/inline/inline_generator.main.Inline.panic-abort.diff4
-rw-r--r--tests/mir-opt/inline/inline_generator.main.Inline.panic-unwind.diff4
-rw-r--r--tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-abort.diff10
-rw-r--r--tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-unwind.diff10
-rw-r--r--tests/mir-opt/inline/issue_106141.outer.Inline.panic-abort.diff2
-rw-r--r--tests/mir-opt/inline/issue_106141.outer.Inline.panic-unwind.diff2
-rw-r--r--tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.b.Inline.after.mir4
-rw-r--r--tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.d.Inline.after.mir4
-rw-r--r--tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-abort.diff2
-rw-r--r--tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-unwind.diff2
-rw-r--r--tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-abort.mir2
-rw-r--r--tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-unwind.mir2
-rw-r--r--tests/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff2
-rw-r--r--tests/mir-opt/instrument_coverage.main.InstrumentCoverage.diff9
-rw-r--r--tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-abort.mir5
-rw-r--r--tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-unwind.mir5
-rw-r--r--tests/mir-opt/pre-codegen/checked_ops.step_forward.PreCodegen.after.mir2
-rw-r--r--tests/mir-opt/pre-codegen/simple_option_map.ezmap.PreCodegen.after.mir2
-rw-r--r--tests/mir-opt/pre-codegen/slice_filter.variant_a-{closure#0}.PreCodegen.after.mir16
-rw-r--r--tests/mir-opt/separate_const_switch.identity.SeparateConstSwitch.diff2
-rw-r--r--tests/run-make/silly-file-names/Makefile18
-rw-r--r--tests/run-make/silly-file-names/silly-file-names.rs4
-rw-r--r--tests/run-make/silly-file-names/silly-file-names.run.stdout2
-rw-r--r--tests/rustdoc-js/impl-trait.js19
-rw-r--r--tests/rustdoc-js/impl-trait.rs6
-rw-r--r--tests/rustdoc-ui/custom_code_classes_in_docs-warning3.stderr2
-rw-r--r--tests/rustdoc-ui/intra-doc/broken-link-in-unused-doc-string.stderr1
-rw-r--r--tests/rustdoc-ui/issues/issue-105742.stderr16
-rw-r--r--tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.rs7
-rw-r--r--tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.stderr26
-rw-r--r--tests/rustdoc-ui/unescaped_backticks.stderr3
-rw-r--r--tests/rustdoc/anchor-id-duplicate-method-name-25001.rs (renamed from tests/rustdoc/issue-25001.rs)3
-rw-r--r--tests/rustdoc/anchor-id-trait-tymethod-28478.rs (renamed from tests/rustdoc/issue-28478.rs)3
-rw-r--r--tests/rustdoc/deduplicate-glob-import-impl-21474.rs (renamed from tests/rustdoc/issue-21474.rs)3
-rw-r--r--tests/rustdoc/deduplicate-trait-impl-22025.rs (renamed from tests/rustdoc/issue-22025.rs)3
-rw-r--r--tests/rustdoc/doctest-hide-empty-line-23106.rs10
-rw-r--r--tests/rustdoc/doctest-markdown-inline-parse-23744.rs (renamed from tests/rustdoc/issue-23744.rs)3
-rw-r--r--tests/rustdoc/doctest-multi-line-string-literal-25944.rs (renamed from tests/rustdoc/issue-25944.rs)3
-rw-r--r--tests/rustdoc/extern-fn-22038.rs (renamed from tests/rustdoc/issue-22038.rs)3
-rw-r--r--tests/rustdoc/ice-reexport-crate-root-28927.rs (renamed from tests/rustdoc/issue-28927.rs)3
-rw-r--r--tests/rustdoc/impl-assoc-type-21092.rs (renamed from tests/rustdoc/issue-21092.rs)3
-rw-r--r--tests/rustdoc/inline_cross/auxiliary/fn-type.rs1
-rw-r--r--tests/rustdoc/inline_cross/auxiliary/impl_trait_aux.rs2
-rw-r--r--tests/rustdoc/inline_cross/auxiliary/issue-21801.rs (renamed from tests/rustdoc/auxiliary/issue-21801.rs)0
-rw-r--r--tests/rustdoc/inline_cross/auxiliary/issue-23207-1.rs (renamed from tests/rustdoc/auxiliary/issue-23207-1.rs)0
-rw-r--r--tests/rustdoc/inline_cross/auxiliary/issue-23207-2.rs (renamed from tests/rustdoc/auxiliary/issue-23207-2.rs)0
-rw-r--r--tests/rustdoc/inline_cross/auxiliary/issue-27362-aux.rs (renamed from tests/rustdoc/auxiliary/issue-27362-aux.rs)0
-rw-r--r--tests/rustdoc/inline_cross/auxiliary/non_lifetime_binders.rs10
-rw-r--r--tests/rustdoc/inline_cross/const-fn-27362.rs (renamed from tests/rustdoc/issue-27362.rs)3
-rw-r--r--tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs (renamed from tests/rustdoc/issue-23207.rs)3
-rw-r--r--tests/rustdoc/inline_cross/fn-type.rs12
-rw-r--r--tests/rustdoc/inline_cross/impl_trait.rs2
-rw-r--r--tests/rustdoc/inline_cross/non_lifetime_binders.rs13
-rw-r--r--tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs (renamed from tests/rustdoc/issue-21801.rs)3
-rw-r--r--tests/rustdoc/issue-23106.rs7
-rw-r--r--tests/rustdoc/macro-doc-comment-23812.rs (renamed from tests/rustdoc/issue-23812.rs)3
-rw-r--r--tests/rustdoc/markdown-table-escape-pipe-27862.rs (renamed from tests/rustdoc/issue-27862.rs)3
-rw-r--r--tests/rustdoc/search-index-primitive-inherent-method-23511.rs (renamed from tests/rustdoc/issue-23511.rs)3
-rw-r--r--tests/rustdoc/src-link-external-macro-26606.rs (renamed from tests/rustdoc/issue-26606.rs)5
-rw-r--r--tests/rustdoc/src-mod-path-absolute-26995.rs (renamed from tests/rustdoc/issue-26995.rs)3
-rw-r--r--tests/rustdoc/staged-api-feature-issue-27759.rs (renamed from tests/rustdoc/issue-27759.rs)3
-rw-r--r--tests/rustdoc/strip-priv-imports-pass-27104.rs (renamed from tests/rustdoc/issue-27104.rs)3
-rw-r--r--tests/ui-fulldeps/plugin/lint-plugin-forbid-attrs.stderr2
-rw-r--r--tests/ui-fulldeps/plugin/lint-plugin-forbid-cmdline.stderr1
-rw-r--r--tests/ui-fulldeps/plugin/lint-tool-cmdline-allow.stderr2
-rw-r--r--tests/ui-fulldeps/plugin/lint-tool-test.stderr12
-rw-r--r--tests/ui-fulldeps/session-diagnostic/diagnostic-derive.stderr2
-rw-r--r--tests/ui-fulldeps/stable-mir/crate-info.rs40
-rw-r--r--tests/ui/allocator/not-an-allocator.stderr3
-rw-r--r--tests/ui/array-slice-vec/vector-no-ann.stderr2
-rw-r--r--tests/ui/asm/x86_64/issue-96797.rs9
-rw-r--r--tests/ui/associated-consts/defaults-not-assumed-fail.stderr1
-rw-r--r--tests/ui/associated-consts/issue-105330.stderr2
-rw-r--r--tests/ui/associated-inherent-types/issue-109789.stderr1
-rw-r--r--tests/ui/associated-type-bounds/duplicate.stderr12
-rw-r--r--tests/ui/associated-type-bounds/issue-71443-1.stderr2
-rw-r--r--tests/ui/associated-types/hr-associated-type-bound-param-2.stderr1
-rw-r--r--tests/ui/async-await/async-await-let-else.stderr2
-rw-r--r--tests/ui/async-await/drop-tracking-unresolved-typeck-results.stderr1
-rw-r--r--tests/ui/async-await/in-trait/async-associated-types.rs2
-rw-r--r--tests/ui/async-await/in-trait/async-default-fn-overridden.rs2
-rw-r--r--tests/ui/async-await/in-trait/async-example-desugared-boxed-in-trait.stderr4
-rw-r--r--tests/ui/async-await/in-trait/async-example-desugared-extra.rs1
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-rw-r--r--tests/ui/async-await/in-trait/async-example.rs3
-rw-r--r--tests/ui/async-await/in-trait/async-generics-and-bounds.stderr16
-rw-r--r--tests/ui/async-await/in-trait/async-generics.stderr16
-rw-r--r--tests/ui/async-await/in-trait/async-lifetimes-and-bounds.rs1
-rw-r--r--tests/ui/async-await/in-trait/async-lifetimes.rs1
-rw-r--r--tests/ui/async-await/in-trait/async-recursive-generic.stderr4
-rw-r--r--tests/ui/async-await/in-trait/async-recursive.stderr4
-rw-r--r--tests/ui/async-await/in-trait/dont-project-to-specializable-projection.stderr8
-rw-r--r--tests/ui/async-await/in-trait/early-bound-1.rs1
-rw-r--r--tests/ui/async-await/in-trait/early-bound-2.rs1
-rw-r--r--tests/ui/async-await/in-trait/fn-not-async-err2.rs2
-rw-r--r--tests/ui/async-await/in-trait/fn-not-async-err2.stderr2
-rw-r--r--tests/ui/async-await/in-trait/implied-bounds.rs2
-rw-r--r--tests/ui/async-await/in-trait/issue-102138.rs2
-rw-r--r--tests/ui/async-await/in-trait/issue-102219.rs1
-rw-r--r--tests/ui/async-await/in-trait/issue-102310.rs1
-rw-r--r--tests/ui/async-await/in-trait/issue-104678.rs1
-rw-r--r--tests/ui/async-await/in-trait/missing-feature-flag.stderr12
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-rw-r--r--tests/ui/codegen/issue-79865-llvm-miscompile.rs2
-rw-r--r--tests/ui/codemap_tests/tab.stderr2
-rw-r--r--tests/ui/compare-method/bad-self-type.stderr4
-rw-r--r--tests/ui/conditional-compilation/cfg-attr-syntax-validation.stderr1
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-rw-r--r--tests/ui/const-generics/const-argument-if-length.full.stderr16
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519 files changed, 3317 insertions, 2054 deletions
diff --git a/tests/assembly/stack-protector/stack-protector-heuristics-effect.rs b/tests/assembly/stack-protector/stack-protector-heuristics-effect.rs
index a7c9e4845c7..e46b902df07 100644
--- a/tests/assembly/stack-protector/stack-protector-heuristics-effect.rs
+++ b/tests/assembly/stack-protector/stack-protector-heuristics-effect.rs
@@ -9,6 +9,7 @@
 // [basic] compile-flags: -Z stack-protector=basic
 // [none] compile-flags: -Z stack-protector=none
 // compile-flags: -C opt-level=2 -Z merge-functions=disabled
+// min-llvm-version: 17.0.2
 
 #![crate_type = "lib"]
 
@@ -371,7 +372,7 @@ pub fn unsized_fn_param(s: [u8], l: bool, f: fn([u8])) {
 
 
     // all: __stack_chk_fail
-    // strong: __stack_chk_fail
+    // strong-NOT: __stack_chk_fail
     // basic-NOT: __stack_chk_fail
     // none-NOT: __stack_chk_fail
     // missing-NOT: __stack_chk_fail
diff --git a/tests/codegen/issue-97217.rs b/tests/codegen/issue-97217.rs
new file mode 100644
index 00000000000..af7345442fc
--- /dev/null
+++ b/tests/codegen/issue-97217.rs
@@ -0,0 +1,22 @@
+// compile-flags: -C opt-level=3
+// ignore-debug: the debug assertions get in the way
+// min-llvm-version: 17.0.2
+#![crate_type = "lib"]
+
+// Regression test for issue 97217 (the following should result in no allocations)
+
+// CHECK-LABEL: @issue97217
+#[no_mangle]
+pub fn issue97217() -> i32 {
+    // drop_in_place should be inlined and never appear
+    // CHECK-NOT: drop_in_place
+
+    // __rust_alloc should be optimized out
+    // CHECK-NOT: __rust_alloc
+
+    let v1 = vec![5, 6, 7];
+    let v1_iter = v1.iter();
+    let total: i32 = v1_iter.sum();
+    println!("{}",total);
+    total
+}
diff --git a/tests/codegen/simd/simd-wide-sum.rs b/tests/codegen/simd/simd-wide-sum.rs
index 3116f9597bc..6e7d3d9316a 100644
--- a/tests/codegen/simd/simd-wide-sum.rs
+++ b/tests/codegen/simd/simd-wide-sum.rs
@@ -11,14 +11,14 @@
 #![feature(portable_simd)]
 
 use std::simd::{Simd, SimdUint};
-const N: usize = 8;
+const N: usize = 16;
 
 #[no_mangle]
 // CHECK-LABEL: @wider_reduce_simd
 pub fn wider_reduce_simd(x: Simd<u8, N>) -> u16 {
-    // CHECK: zext <8 x i8>
-    // CHECK-SAME: to <8 x i16>
-    // CHECK: call i16 @llvm.vector.reduce.add.v8i16(<8 x i16>
+    // CHECK: zext <16 x i8>
+    // CHECK-SAME: to <16 x i16>
+    // CHECK: call i16 @llvm.vector.reduce.add.v16i16(<16 x i16>
     let x: Simd<u16, N> = x.cast();
     x.reduce_sum()
 }
@@ -26,9 +26,9 @@ pub fn wider_reduce_simd(x: Simd<u8, N>) -> u16 {
 #[no_mangle]
 // CHECK-LABEL: @wider_reduce_loop
 pub fn wider_reduce_loop(x: Simd<u8, N>) -> u16 {
-    // CHECK: zext <8 x i8>
-    // CHECK-SAME: to <8 x i16>
-    // CHECK: call i16 @llvm.vector.reduce.add.v8i16(<8 x i16>
+    // CHECK: zext <16 x i8>
+    // CHECK-SAME: to <16 x i16>
+    // CHECK: call i16 @llvm.vector.reduce.add.v16i16(<16 x i16>
     let mut sum = 0_u16;
     for i in 0..N {
         sum += u16::from(x[i]);
@@ -39,9 +39,9 @@ pub fn wider_reduce_loop(x: Simd<u8, N>) -> u16 {
 #[no_mangle]
 // CHECK-LABEL: @wider_reduce_iter
 pub fn wider_reduce_iter(x: Simd<u8, N>) -> u16 {
-    // CHECK: zext <8 x i8>
-    // CHECK-SAME: to <8 x i16>
-    // CHECK: call i16 @llvm.vector.reduce.add.v8i16(<8 x i16>
+    // CHECK: zext <16 x i8>
+    // CHECK-SAME: to <16 x i16>
+    // CHECK: call i16 @llvm.vector.reduce.add.v16i16(<16 x i16>
     x.as_array().iter().copied().map(u16::from).sum()
 }
 
@@ -52,8 +52,8 @@ pub fn wider_reduce_iter(x: Simd<u8, N>) -> u16 {
 #[no_mangle]
 // CHECK-LABEL: @wider_reduce_into_iter
 pub fn wider_reduce_into_iter(x: Simd<u8, N>) -> u16 {
-    // CHECK: zext <8 x i8>
-    // CHECK-SAME: to <8 x i16>
-    // CHECK: call i16 @llvm.vector.reduce.add.v8i16(<8 x i16>
+    // FIXME: It would be nice if this was exactly the same as the above tests,
+    // but at the time of writing this comment, that didn't happen on LLVM main.
+    // CHECK: call i16 @llvm.vector.reduce.add
     x.to_array().into_iter().map(u16::from).sum()
 }
diff --git a/tests/codegen/unwind-landingpad-cold.rs b/tests/codegen/unwind-landingpad-cold.rs
new file mode 100644
index 00000000000..3a902a7d712
--- /dev/null
+++ b/tests/codegen/unwind-landingpad-cold.rs
@@ -0,0 +1,16 @@
+// compile-flags: -Cno-prepopulate-passes
+// needs-unwind
+// min-llvm-version: 17.0.2
+#![crate_type = "lib"]
+
+// This test checks that drop calls in unwind landing pads
+// get the `cold` attribute.
+
+// CHECK-LABEL: @check_cold
+// CHECK: {{(call|invoke) void .+}}drop_in_place{{.+}} [[ATTRIBUTES:#[0-9]+]]
+// CHECK: attributes [[ATTRIBUTES]] = { cold }
+#[no_mangle]
+pub fn check_cold(f: fn(), x: Box<u32>) {
+    // this may unwind
+    f();
+}
diff --git a/tests/codegen/unwind-landingpad-inline.rs b/tests/codegen/unwind-landingpad-inline.rs
new file mode 100644
index 00000000000..0774cefdd2d
--- /dev/null
+++ b/tests/codegen/unwind-landingpad-inline.rs
@@ -0,0 +1,39 @@
+// min-llvm-version: 17.0.2
+// compile-flags: -Copt-level=3
+// ignore-debug: the debug assertions get in the way
+#![crate_type = "lib"]
+
+// This test checks that we can inline drop_in_place in
+// unwind landing pads.
+
+// Without inlining, the box pointers escape via the call to drop_in_place,
+// and LLVM will not optimize out the pointer comparison.
+// With inlining, everything should be optimized out.
+// See https://github.com/rust-lang/rust/issues/46515
+// CHECK-LABEL: @check_no_escape_in_landingpad
+// CHECK: start:
+// CHECK-NEXT: __rust_no_alloc_shim_is_unstable
+// CHECK-NEXT: __rust_no_alloc_shim_is_unstable
+// CHECK-NEXT: ret void
+#[no_mangle]
+pub fn check_no_escape_in_landingpad(f: fn()) {
+    let x = &*Box::new(0);
+    let y = &*Box::new(0);
+
+    if x as *const _ == y as *const _ {
+        f();
+    }
+}
+
+// Without inlining, the compiler can't tell that
+// dropping an empty string (in a landing pad) does nothing.
+// With inlining, the landing pad should be optimized out.
+// See https://github.com/rust-lang/rust/issues/87055
+// CHECK-LABEL: @check_eliminate_noop_drop
+// CHECK: call void %g()
+// CHECK-NEXT: ret void
+#[no_mangle]
+pub fn check_eliminate_noop_drop(g: fn()) {
+    let _var = String::new();
+    g();
+}
diff --git a/tests/coverage-map/status-quo/async.cov-map b/tests/coverage-map/status-quo/async.cov-map
index 5f28252ef80..598791537ad 100644
--- a/tests/coverage-map/status-quo/async.cov-map
+++ b/tests/coverage-map/status-quo/async.cov-map
@@ -38,42 +38,40 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 13, 20) to (start + 0, 25)
 
 Function name: async::e (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 0f, 01, 00, 14]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 0f, 01, 00, 14]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 15, 1) to (start + 0, 20)
+- Code(Zero) at (prev + 15, 1) to (start + 0, 20)
 
 Function name: async::e::{closure#0} (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 0f, 14, 00, 19]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 0f, 14, 00, 19]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 15, 20) to (start + 0, 25)
+- Code(Zero) at (prev + 15, 20) to (start + 0, 25)
 
 Function name: async::executor::block_on::<core::pin::Pin<&mut async::i::{closure#0}>>
-Raw bytes (44): 0x[01, 01, 05, 0b, 05, 01, 05, 01, 05, 02, 00, 02, 00, 06, 01, 6e, 05, 0a, 36, 02, 0d, 20, 00, 23, 0b, 00, 27, 00, 49, 0f, 01, 17, 00, 1a, 05, 01, 0e, 00, 0f, 13, 02, 05, 00, 06]
+Raw bytes (40): 0x[01, 01, 03, 0b, 05, 01, 05, 01, 05, 06, 01, 6e, 05, 0a, 36, 02, 0d, 20, 00, 23, 0b, 00, 27, 00, 49, 02, 01, 17, 00, 1a, 05, 01, 0e, 00, 0f, 02, 02, 05, 00, 06]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
+Number of expressions: 3
 - expression 0 operands: lhs = Expression(2, Add), rhs = Counter(1)
 - expression 1 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 2 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 3 operands: lhs = Expression(0, Sub), rhs = Zero
-- expression 4 operands: lhs = Expression(0, Sub), rhs = Zero
 Number of file 0 mappings: 6
 - Code(Counter(0)) at (prev + 110, 5) to (start + 10, 54)
 - Code(Expression(0, Sub)) at (prev + 13, 32) to (start + 0, 35)
     = ((c0 + c1) - c1)
 - Code(Expression(2, Add)) at (prev + 0, 39) to (start + 0, 73)
     = (c0 + c1)
-- Code(Expression(3, Add)) at (prev + 1, 23) to (start + 0, 26)
-    = (((c0 + c1) - c1) + Zero)
+- Code(Expression(0, Sub)) at (prev + 1, 23) to (start + 0, 26)
+    = ((c0 + c1) - c1)
 - Code(Counter(1)) at (prev + 1, 14) to (start + 0, 15)
-- Code(Expression(4, Add)) at (prev + 2, 5) to (start + 0, 6)
-    = (((c0 + c1) - c1) + Zero)
+- Code(Expression(0, Sub)) at (prev + 2, 5) to (start + 0, 6)
+    = ((c0 + c1) - c1)
 
 Function name: async::executor::block_on::VTABLE::{closure#0}
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 72, 11, 00, 33]
@@ -124,20 +122,20 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 17, 20) to (start + 0, 25)
 
 Function name: async::foo (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 13, 01, 00, 1e]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 13, 01, 00, 1e]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 19, 1) to (start + 0, 30)
+- Code(Zero) at (prev + 19, 1) to (start + 0, 30)
 
 Function name: async::foo::{closure#0} (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 13, 1e, 00, 2d]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 13, 1e, 00, 2d]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 19, 30) to (start + 0, 45)
+- Code(Zero) at (prev + 19, 30) to (start + 0, 45)
 
 Function name: async::g
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 15, 01, 00, 17]
@@ -148,14 +146,14 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 21, 1) to (start + 0, 23)
 
 Function name: async::g::{closure#0} (unused)
-Raw bytes (69): 0x[01, 01, 00, 0d, 00, 15, 17, 01, 0c, 00, 02, 09, 00, 0a, 01, 00, 0e, 00, 11, 00, 00, 12, 00, 17, 00, 00, 1b, 00, 1c, 00, 00, 20, 00, 22, 00, 01, 09, 00, 0a, 00, 00, 0e, 00, 11, 00, 00, 12, 00, 17, 00, 00, 1b, 00, 1c, 00, 00, 20, 00, 22, 00, 01, 0e, 00, 10, 00, 02, 01, 00, 02]
+Raw bytes (69): 0x[01, 01, 00, 0d, 00, 15, 17, 01, 0c, 00, 02, 09, 00, 0a, 00, 00, 0e, 00, 11, 00, 00, 12, 00, 17, 00, 00, 1b, 00, 1c, 00, 00, 20, 00, 22, 00, 01, 09, 00, 0a, 00, 00, 0e, 00, 11, 00, 00, 12, 00, 17, 00, 00, 1b, 00, 1c, 00, 00, 20, 00, 22, 00, 01, 0e, 00, 10, 00, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 13
 - Code(Zero) at (prev + 21, 23) to (start + 1, 12)
 - Code(Zero) at (prev + 2, 9) to (start + 0, 10)
-- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 17)
+- Code(Zero) at (prev + 0, 14) to (start + 0, 17)
 - Code(Zero) at (prev + 0, 18) to (start + 0, 23)
 - Code(Zero) at (prev + 0, 27) to (start + 0, 28)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 34)
@@ -176,14 +174,14 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 29, 1) to (start + 0, 22)
 
 Function name: async::h::{closure#0} (unused)
-Raw bytes (44): 0x[01, 01, 00, 08, 00, 1d, 16, 03, 0c, 00, 04, 09, 00, 0a, 01, 00, 0e, 00, 13, 00, 00, 14, 00, 19, 00, 00, 1a, 00, 1b, 00, 00, 20, 00, 22, 00, 01, 0e, 00, 10, 00, 02, 01, 00, 02]
+Raw bytes (44): 0x[01, 01, 00, 08, 00, 1d, 16, 03, 0c, 00, 04, 09, 00, 0a, 00, 00, 0e, 00, 13, 00, 00, 14, 00, 19, 00, 00, 1a, 00, 1b, 00, 00, 20, 00, 22, 00, 01, 0e, 00, 10, 00, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 8
 - Code(Zero) at (prev + 29, 22) to (start + 3, 12)
 - Code(Zero) at (prev + 4, 9) to (start + 0, 10)
-- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 19)
+- Code(Zero) at (prev + 0, 14) to (start + 0, 19)
 - Code(Zero) at (prev + 0, 20) to (start + 0, 25)
 - Code(Zero) at (prev + 0, 26) to (start + 0, 27)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 34)
@@ -199,58 +197,46 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 38, 1) to (start + 0, 19)
 
 Function name: async::i::{closure#0}
-Raw bytes (84): 0x[01, 01, 05, 01, 00, 0d, 00, 1d, 00, 19, 13, 1d, 21, 0e, 01, 26, 13, 04, 0c, 0d, 05, 09, 00, 0a, 03, 00, 0e, 00, 12, 05, 00, 13, 00, 18, 09, 00, 1c, 00, 21, 07, 00, 27, 00, 2a, 15, 00, 2b, 00, 30, 1d, 01, 09, 00, 0a, 11, 00, 0e, 00, 11, 25, 00, 12, 00, 17, 29, 00, 1b, 00, 20, 0b, 00, 24, 00, 26, 21, 01, 0e, 00, 10, 0f, 02, 01, 00, 02]
+Raw bytes (78): 0x[01, 01, 02, 19, 07, 1d, 21, 0e, 01, 26, 13, 04, 0c, 0d, 05, 09, 00, 0a, 01, 00, 0e, 00, 12, 05, 00, 13, 00, 18, 09, 00, 1c, 00, 21, 0d, 00, 27, 00, 2a, 15, 00, 2b, 00, 30, 1d, 01, 09, 00, 0a, 11, 00, 0e, 00, 11, 25, 00, 12, 00, 17, 29, 00, 1b, 00, 20, 1d, 00, 24, 00, 26, 21, 01, 0e, 00, 10, 03, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
-- expression 0 operands: lhs = Counter(0), rhs = Zero
-- expression 1 operands: lhs = Counter(3), rhs = Zero
-- expression 2 operands: lhs = Counter(7), rhs = Zero
-- expression 3 operands: lhs = Counter(6), rhs = Expression(4, Add)
-- expression 4 operands: lhs = Counter(7), rhs = Counter(8)
+Number of expressions: 2
+- expression 0 operands: lhs = Counter(6), rhs = Expression(1, Add)
+- expression 1 operands: lhs = Counter(7), rhs = Counter(8)
 Number of file 0 mappings: 14
 - Code(Counter(0)) at (prev + 38, 19) to (start + 4, 12)
 - Code(Counter(3)) at (prev + 5, 9) to (start + 0, 10)
-- Code(Expression(0, Add)) at (prev + 0, 14) to (start + 0, 18)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 18)
 - Code(Counter(1)) at (prev + 0, 19) to (start + 0, 24)
 - Code(Counter(2)) at (prev + 0, 28) to (start + 0, 33)
-- Code(Expression(1, Add)) at (prev + 0, 39) to (start + 0, 42)
-    = (c3 + Zero)
+- Code(Counter(3)) at (prev + 0, 39) to (start + 0, 42)
 - Code(Counter(5)) at (prev + 0, 43) to (start + 0, 48)
 - Code(Counter(7)) at (prev + 1, 9) to (start + 0, 10)
 - Code(Counter(4)) at (prev + 0, 14) to (start + 0, 17)
 - Code(Counter(9)) at (prev + 0, 18) to (start + 0, 23)
 - Code(Counter(10)) at (prev + 0, 27) to (start + 0, 32)
-- Code(Expression(2, Add)) at (prev + 0, 36) to (start + 0, 38)
-    = (c7 + Zero)
+- Code(Counter(7)) at (prev + 0, 36) to (start + 0, 38)
 - Code(Counter(8)) at (prev + 1, 14) to (start + 0, 16)
-- Code(Expression(3, Add)) at (prev + 2, 1) to (start + 0, 2)
+- Code(Expression(0, Add)) at (prev + 2, 1) to (start + 0, 2)
     = (c6 + (c7 + c8))
 
 Function name: async::j
-Raw bytes (59): 0x[01, 01, 05, 01, 00, 05, 00, 09, 00, 05, 13, 09, 0d, 09, 01, 31, 01, 13, 0c, 05, 14, 09, 00, 0a, 03, 00, 0e, 00, 1b, 07, 00, 1f, 00, 27, 09, 01, 09, 00, 0a, 11, 00, 0e, 00, 1a, 0b, 00, 1e, 00, 20, 0d, 01, 0e, 00, 10, 0f, 02, 01, 00, 02]
+Raw bytes (53): 0x[01, 01, 02, 05, 07, 09, 0d, 09, 01, 31, 01, 13, 0c, 05, 14, 09, 00, 0a, 01, 00, 0e, 00, 1b, 05, 00, 1f, 00, 27, 09, 01, 09, 00, 0a, 11, 00, 0e, 00, 1a, 09, 00, 1e, 00, 20, 0d, 01, 0e, 00, 10, 03, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
-- expression 0 operands: lhs = Counter(0), rhs = Zero
-- expression 1 operands: lhs = Counter(1), rhs = Zero
-- expression 2 operands: lhs = Counter(2), rhs = Zero
-- expression 3 operands: lhs = Counter(1), rhs = Expression(4, Add)
-- expression 4 operands: lhs = Counter(2), rhs = Counter(3)
+Number of expressions: 2
+- expression 0 operands: lhs = Counter(1), rhs = Expression(1, Add)
+- expression 1 operands: lhs = Counter(2), rhs = Counter(3)
 Number of file 0 mappings: 9
 - Code(Counter(0)) at (prev + 49, 1) to (start + 19, 12)
 - Code(Counter(1)) at (prev + 20, 9) to (start + 0, 10)
-- Code(Expression(0, Add)) at (prev + 0, 14) to (start + 0, 27)
-    = (c0 + Zero)
-- Code(Expression(1, Add)) at (prev + 0, 31) to (start + 0, 39)
-    = (c1 + Zero)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 27)
+- Code(Counter(1)) at (prev + 0, 31) to (start + 0, 39)
 - Code(Counter(2)) at (prev + 1, 9) to (start + 0, 10)
 - Code(Counter(4)) at (prev + 0, 14) to (start + 0, 26)
-- Code(Expression(2, Add)) at (prev + 0, 30) to (start + 0, 32)
-    = (c2 + Zero)
+- Code(Counter(2)) at (prev + 0, 30) to (start + 0, 32)
 - Code(Counter(3)) at (prev + 1, 14) to (start + 0, 16)
-- Code(Expression(3, Add)) at (prev + 2, 1) to (start + 0, 2)
+- Code(Expression(0, Add)) at (prev + 2, 1) to (start + 0, 2)
     = (c1 + (c2 + c3))
 
 Function name: async::j::c
@@ -285,12 +271,12 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 67, 5) to (start + 0, 23)
 
 Function name: async::k (unused)
-Raw bytes (29): 0x[01, 01, 00, 05, 01, 4b, 01, 01, 0c, 00, 02, 0e, 00, 10, 00, 01, 0e, 00, 10, 00, 01, 0e, 00, 10, 00, 02, 01, 00, 02]
+Raw bytes (29): 0x[01, 01, 00, 05, 00, 4b, 01, 01, 0c, 00, 02, 0e, 00, 10, 00, 01, 0e, 00, 10, 00, 01, 0e, 00, 10, 00, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 5
-- Code(Counter(0)) at (prev + 75, 1) to (start + 1, 12)
+- Code(Zero) at (prev + 75, 1) to (start + 1, 12)
 - Code(Zero) at (prev + 2, 14) to (start + 0, 16)
 - Code(Zero) at (prev + 1, 14) to (start + 0, 16)
 - Code(Zero) at (prev + 1, 14) to (start + 0, 16)
@@ -323,12 +309,12 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 91, 1) to (start + 0, 25)
 
 Function name: async::m::{closure#0} (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 5b, 19, 00, 22]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 5b, 19, 00, 22]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 91, 25) to (start + 0, 34)
+- Code(Zero) at (prev + 91, 25) to (start + 0, 34)
 
 Function name: async::main
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 5d, 01, 08, 02]
diff --git a/tests/coverage-map/status-quo/async2.cov-map b/tests/coverage-map/status-quo/async2.cov-map
index fe74dcd8840..cc7aed9aee3 100644
--- a/tests/coverage-map/status-quo/async2.cov-map
+++ b/tests/coverage-map/status-quo/async2.cov-map
@@ -38,48 +38,44 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 19, 36) to (start + 2, 2)
 
 Function name: async2::executor::block_on::<async2::async_func::{closure#0}>
-Raw bytes (44): 0x[01, 01, 05, 0b, 05, 01, 05, 01, 05, 02, 00, 02, 00, 06, 01, 27, 05, 0a, 36, 02, 0d, 20, 00, 23, 0b, 00, 27, 00, 49, 0f, 01, 17, 00, 1a, 05, 01, 0e, 00, 0f, 13, 02, 05, 00, 06]
+Raw bytes (40): 0x[01, 01, 03, 0b, 05, 01, 05, 01, 05, 06, 01, 27, 05, 0a, 36, 02, 0d, 20, 00, 23, 0b, 00, 27, 00, 49, 02, 01, 17, 00, 1a, 05, 01, 0e, 00, 0f, 02, 02, 05, 00, 06]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
+Number of expressions: 3
 - expression 0 operands: lhs = Expression(2, Add), rhs = Counter(1)
 - expression 1 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 2 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 3 operands: lhs = Expression(0, Sub), rhs = Zero
-- expression 4 operands: lhs = Expression(0, Sub), rhs = Zero
 Number of file 0 mappings: 6
 - Code(Counter(0)) at (prev + 39, 5) to (start + 10, 54)
 - Code(Expression(0, Sub)) at (prev + 13, 32) to (start + 0, 35)
     = ((c0 + c1) - c1)
 - Code(Expression(2, Add)) at (prev + 0, 39) to (start + 0, 73)
     = (c0 + c1)
-- Code(Expression(3, Add)) at (prev + 1, 23) to (start + 0, 26)
-    = (((c0 + c1) - c1) + Zero)
+- Code(Expression(0, Sub)) at (prev + 1, 23) to (start + 0, 26)
+    = ((c0 + c1) - c1)
 - Code(Counter(1)) at (prev + 1, 14) to (start + 0, 15)
-- Code(Expression(4, Add)) at (prev + 2, 5) to (start + 0, 6)
-    = (((c0 + c1) - c1) + Zero)
+- Code(Expression(0, Sub)) at (prev + 2, 5) to (start + 0, 6)
+    = ((c0 + c1) - c1)
 
 Function name: async2::executor::block_on::<async2::async_func_just_println::{closure#0}>
-Raw bytes (44): 0x[01, 01, 05, 0b, 05, 01, 05, 01, 05, 02, 00, 02, 00, 06, 01, 27, 05, 0a, 36, 02, 0d, 20, 00, 23, 0b, 00, 27, 00, 49, 0f, 01, 17, 00, 1a, 05, 01, 0e, 00, 0f, 13, 02, 05, 00, 06]
+Raw bytes (40): 0x[01, 01, 03, 0b, 05, 01, 05, 01, 05, 06, 01, 27, 05, 0a, 36, 02, 0d, 20, 00, 23, 0b, 00, 27, 00, 49, 02, 01, 17, 00, 1a, 05, 01, 0e, 00, 0f, 02, 02, 05, 00, 06]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
+Number of expressions: 3
 - expression 0 operands: lhs = Expression(2, Add), rhs = Counter(1)
 - expression 1 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 2 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 3 operands: lhs = Expression(0, Sub), rhs = Zero
-- expression 4 operands: lhs = Expression(0, Sub), rhs = Zero
 Number of file 0 mappings: 6
 - Code(Counter(0)) at (prev + 39, 5) to (start + 10, 54)
 - Code(Expression(0, Sub)) at (prev + 13, 32) to (start + 0, 35)
     = ((c0 + c1) - c1)
 - Code(Expression(2, Add)) at (prev + 0, 39) to (start + 0, 73)
     = (c0 + c1)
-- Code(Expression(3, Add)) at (prev + 1, 23) to (start + 0, 26)
-    = (((c0 + c1) - c1) + Zero)
+- Code(Expression(0, Sub)) at (prev + 1, 23) to (start + 0, 26)
+    = ((c0 + c1) - c1)
 - Code(Counter(1)) at (prev + 1, 14) to (start + 0, 15)
-- Code(Expression(4, Add)) at (prev + 2, 5) to (start + 0, 6)
-    = (((c0 + c1) - c1) + Zero)
+- Code(Expression(0, Sub)) at (prev + 2, 5) to (start + 0, 6)
+    = ((c0 + c1) - c1)
 
 Function name: async2::executor::block_on::VTABLE::{closure#0}
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 2b, 11, 00, 33]
diff --git a/tests/coverage-map/status-quo/closure.cov-map b/tests/coverage-map/status-quo/closure.cov-map
index 7dbf6ec834d..522c1e73afe 100644
--- a/tests/coverage-map/status-quo/closure.cov-map
+++ b/tests/coverage-map/status-quo/closure.cov-map
@@ -1,77 +1,36 @@
 Function name: closure::main
-Raw bytes (170): 0x[01, 01, 17, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 00, 01, 05, 05, 5a, 01, 05, 18, 01, 08, 01, 0f, 0d, 03, 16, 0e, 06, 0a, 07, 10, 05, 13, 0d, 0b, 1a, 0e, 06, 0a, 0f, 10, 05, 0c, 16, 13, 16, 05, 0d, 18, 17, 19, 09, 01, 1e, 1b, 04, 09, 00, 29, 1f, 01, 09, 00, 2d, 23, 01, 09, 00, 24, 27, 05, 09, 00, 24, 2b, 02, 09, 00, 21, 2f, 04, 09, 00, 21, 33, 04, 09, 00, 28, 37, 09, 09, 00, 32, 3b, 04, 09, 00, 33, 3f, 07, 09, 00, 4b, 43, 08, 09, 00, 48, 47, 0a, 09, 00, 47, 4b, 08, 09, 00, 44, 4f, 0a, 08, 00, 10, 05, 00, 11, 04, 06, 5a, 04, 06, 00, 07, 57, 01, 05, 03, 02]
+Raw bytes (128): 0x[01, 01, 02, 01, 05, 05, 02, 18, 01, 08, 01, 0f, 0d, 01, 16, 0e, 06, 0a, 01, 10, 05, 13, 0d, 01, 1a, 0e, 06, 0a, 01, 10, 05, 0c, 16, 01, 16, 05, 0d, 18, 01, 19, 09, 01, 1e, 01, 04, 09, 00, 29, 01, 01, 09, 00, 2d, 01, 01, 09, 00, 24, 01, 05, 09, 00, 24, 01, 02, 09, 00, 21, 01, 04, 09, 00, 21, 01, 04, 09, 00, 28, 01, 09, 09, 00, 32, 01, 04, 09, 00, 33, 01, 07, 09, 00, 4b, 01, 08, 09, 00, 48, 01, 0a, 09, 00, 47, 01, 08, 09, 00, 44, 01, 0a, 08, 00, 10, 05, 00, 11, 04, 06, 02, 04, 06, 00, 07, 07, 01, 05, 03, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 23
-- expression 0 operands: lhs = Counter(0), rhs = Zero
-- expression 1 operands: lhs = Counter(0), rhs = Zero
-- expression 2 operands: lhs = Counter(0), rhs = Zero
-- expression 3 operands: lhs = Counter(0), rhs = Zero
-- expression 4 operands: lhs = Counter(0), rhs = Zero
-- expression 5 operands: lhs = Counter(0), rhs = Zero
-- expression 6 operands: lhs = Counter(0), rhs = Zero
-- expression 7 operands: lhs = Counter(0), rhs = Zero
-- expression 8 operands: lhs = Counter(0), rhs = Zero
-- expression 9 operands: lhs = Counter(0), rhs = Zero
-- expression 10 operands: lhs = Counter(0), rhs = Zero
-- expression 11 operands: lhs = Counter(0), rhs = Zero
-- expression 12 operands: lhs = Counter(0), rhs = Zero
-- expression 13 operands: lhs = Counter(0), rhs = Zero
-- expression 14 operands: lhs = Counter(0), rhs = Zero
-- expression 15 operands: lhs = Counter(0), rhs = Zero
-- expression 16 operands: lhs = Counter(0), rhs = Zero
-- expression 17 operands: lhs = Counter(0), rhs = Zero
-- expression 18 operands: lhs = Counter(0), rhs = Zero
-- expression 19 operands: lhs = Counter(0), rhs = Zero
-- expression 20 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 21 operands: lhs = Counter(1), rhs = Expression(22, Sub)
-- expression 22 operands: lhs = Counter(0), rhs = Counter(1)
+Number of expressions: 2
+- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
+- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 24
 - Code(Counter(0)) at (prev + 8, 1) to (start + 15, 13)
-- Code(Expression(0, Add)) at (prev + 22, 14) to (start + 6, 10)
-    = (c0 + Zero)
-- Code(Expression(1, Add)) at (prev + 16, 5) to (start + 19, 13)
-    = (c0 + Zero)
-- Code(Expression(2, Add)) at (prev + 26, 14) to (start + 6, 10)
-    = (c0 + Zero)
-- Code(Expression(3, Add)) at (prev + 16, 5) to (start + 12, 22)
-    = (c0 + Zero)
-- Code(Expression(4, Add)) at (prev + 22, 5) to (start + 13, 24)
-    = (c0 + Zero)
-- Code(Expression(5, Add)) at (prev + 25, 9) to (start + 1, 30)
-    = (c0 + Zero)
-- Code(Expression(6, Add)) at (prev + 4, 9) to (start + 0, 41)
-    = (c0 + Zero)
-- Code(Expression(7, Add)) at (prev + 1, 9) to (start + 0, 45)
-    = (c0 + Zero)
-- Code(Expression(8, Add)) at (prev + 1, 9) to (start + 0, 36)
-    = (c0 + Zero)
-- Code(Expression(9, Add)) at (prev + 5, 9) to (start + 0, 36)
-    = (c0 + Zero)
-- Code(Expression(10, Add)) at (prev + 2, 9) to (start + 0, 33)
-    = (c0 + Zero)
-- Code(Expression(11, Add)) at (prev + 4, 9) to (start + 0, 33)
-    = (c0 + Zero)
-- Code(Expression(12, Add)) at (prev + 4, 9) to (start + 0, 40)
-    = (c0 + Zero)
-- Code(Expression(13, Add)) at (prev + 9, 9) to (start + 0, 50)
-    = (c0 + Zero)
-- Code(Expression(14, Add)) at (prev + 4, 9) to (start + 0, 51)
-    = (c0 + Zero)
-- Code(Expression(15, Add)) at (prev + 7, 9) to (start + 0, 75)
-    = (c0 + Zero)
-- Code(Expression(16, Add)) at (prev + 8, 9) to (start + 0, 72)
-    = (c0 + Zero)
-- Code(Expression(17, Add)) at (prev + 10, 9) to (start + 0, 71)
-    = (c0 + Zero)
-- Code(Expression(18, Add)) at (prev + 8, 9) to (start + 0, 68)
-    = (c0 + Zero)
-- Code(Expression(19, Add)) at (prev + 10, 8) to (start + 0, 16)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 22, 14) to (start + 6, 10)
+- Code(Counter(0)) at (prev + 16, 5) to (start + 19, 13)
+- Code(Counter(0)) at (prev + 26, 14) to (start + 6, 10)
+- Code(Counter(0)) at (prev + 16, 5) to (start + 12, 22)
+- Code(Counter(0)) at (prev + 22, 5) to (start + 13, 24)
+- Code(Counter(0)) at (prev + 25, 9) to (start + 1, 30)
+- Code(Counter(0)) at (prev + 4, 9) to (start + 0, 41)
+- Code(Counter(0)) at (prev + 1, 9) to (start + 0, 45)
+- Code(Counter(0)) at (prev + 1, 9) to (start + 0, 36)
+- Code(Counter(0)) at (prev + 5, 9) to (start + 0, 36)
+- Code(Counter(0)) at (prev + 2, 9) to (start + 0, 33)
+- Code(Counter(0)) at (prev + 4, 9) to (start + 0, 33)
+- Code(Counter(0)) at (prev + 4, 9) to (start + 0, 40)
+- Code(Counter(0)) at (prev + 9, 9) to (start + 0, 50)
+- Code(Counter(0)) at (prev + 4, 9) to (start + 0, 51)
+- Code(Counter(0)) at (prev + 7, 9) to (start + 0, 75)
+- Code(Counter(0)) at (prev + 8, 9) to (start + 0, 72)
+- Code(Counter(0)) at (prev + 10, 9) to (start + 0, 71)
+- Code(Counter(0)) at (prev + 8, 9) to (start + 0, 68)
+- Code(Counter(0)) at (prev + 10, 8) to (start + 0, 16)
 - Code(Counter(1)) at (prev + 0, 17) to (start + 4, 6)
-- Code(Expression(22, Sub)) at (prev + 4, 6) to (start + 0, 7)
+- Code(Expression(0, Sub)) at (prev + 4, 6) to (start + 0, 7)
     = (c0 - c1)
-- Code(Expression(21, Add)) at (prev + 1, 5) to (start + 3, 2)
+- Code(Expression(1, Add)) at (prev + 1, 5) to (start + 3, 2)
     = (c1 + (c0 - c1))
 
 Function name: closure::main::{closure#0}
@@ -90,46 +49,45 @@ Number of file 0 mappings: 4
     = (c1 + (c0 - c1))
 
 Function name: closure::main::{closure#10} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, 9a, 01, 07, 00, 21]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, 9a, 01, 07, 00, 21]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 154, 7) to (start + 0, 33)
+- Code(Zero) at (prev + 154, 7) to (start + 0, 33)
 
 Function name: closure::main::{closure#11} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, 9e, 01, 07, 00, 21]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, 9e, 01, 07, 00, 21]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 158, 7) to (start + 0, 33)
+- Code(Zero) at (prev + 158, 7) to (start + 0, 33)
 
 Function name: closure::main::{closure#12} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, a6, 01, 01, 00, 17]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, a6, 01, 01, 00, 17]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 166, 1) to (start + 0, 23)
+- Code(Zero) at (prev + 166, 1) to (start + 0, 23)
 
 Function name: closure::main::{closure#13} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, ab, 01, 0d, 02, 0e]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, ab, 01, 0d, 02, 0e]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 171, 13) to (start + 2, 14)
+- Code(Zero) at (prev + 171, 13) to (start + 2, 14)
 
 Function name: closure::main::{closure#14}
-Raw bytes (38): 0x[01, 01, 04, 05, 0a, 01, 05, 01, 05, 03, 00, 05, 03, b2, 01, 0d, 00, 15, 01, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0a, 00, 2f, 00, 33, 0f, 01, 0d, 00, 0e]
+Raw bytes (36): 0x[01, 01, 03, 05, 0a, 01, 05, 01, 05, 05, 03, b2, 01, 0d, 00, 15, 01, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0a, 00, 2f, 00, 33, 03, 01, 0d, 00, 0e]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 4
+Number of expressions: 3
 - expression 0 operands: lhs = Counter(1), rhs = Expression(2, Sub)
 - expression 1 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 2 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 3 operands: lhs = Expression(0, Add), rhs = Zero
 Number of file 0 mappings: 5
 - Code(Expression(0, Add)) at (prev + 178, 13) to (start + 0, 21)
     = (c1 + (c0 - c1))
@@ -137,40 +95,36 @@ Number of file 0 mappings: 5
 - Code(Counter(1)) at (prev + 1, 30) to (start + 0, 37)
 - Code(Expression(2, Sub)) at (prev + 0, 47) to (start + 0, 51)
     = (c0 - c1)
-- Code(Expression(3, Add)) at (prev + 1, 13) to (start + 0, 14)
-    = ((c1 + (c0 - c1)) + Zero)
+- Code(Expression(0, Add)) at (prev + 1, 13) to (start + 0, 14)
+    = (c1 + (c0 - c1))
 
 Function name: closure::main::{closure#15}
-Raw bytes (45): 0x[01, 01, 05, 05, 0e, 01, 05, 01, 00, 01, 05, 03, 00, 06, 01, ba, 01, 09, 00, 0a, 03, 01, 0d, 00, 15, 0b, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0e, 00, 2f, 00, 33, 13, 02, 09, 00, 0a]
+Raw bytes (41): 0x[01, 01, 03, 05, 0a, 01, 05, 01, 05, 06, 01, ba, 01, 09, 00, 0a, 03, 01, 0d, 00, 15, 01, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0a, 00, 2f, 00, 33, 03, 02, 09, 00, 0a]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
-- expression 0 operands: lhs = Counter(1), rhs = Expression(3, Sub)
+Number of expressions: 3
+- expression 0 operands: lhs = Counter(1), rhs = Expression(2, Sub)
 - expression 1 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 2 operands: lhs = Counter(0), rhs = Zero
-- expression 3 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 4 operands: lhs = Expression(0, Add), rhs = Zero
+- expression 2 operands: lhs = Counter(0), rhs = Counter(1)
 Number of file 0 mappings: 6
 - Code(Counter(0)) at (prev + 186, 9) to (start + 0, 10)
 - Code(Expression(0, Add)) at (prev + 1, 13) to (start + 0, 21)
     = (c1 + (c0 - c1))
-- Code(Expression(2, Add)) at (prev + 1, 17) to (start + 1, 27)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 1, 17) to (start + 1, 27)
 - Code(Counter(1)) at (prev + 1, 30) to (start + 0, 37)
-- Code(Expression(3, Sub)) at (prev + 0, 47) to (start + 0, 51)
+- Code(Expression(2, Sub)) at (prev + 0, 47) to (start + 0, 51)
     = (c0 - c1)
-- Code(Expression(4, Add)) at (prev + 2, 9) to (start + 0, 10)
-    = ((c1 + (c0 - c1)) + Zero)
+- Code(Expression(0, Add)) at (prev + 2, 9) to (start + 0, 10)
+    = (c1 + (c0 - c1))
 
 Function name: closure::main::{closure#16}
-Raw bytes (38): 0x[01, 01, 04, 05, 0a, 01, 05, 01, 05, 03, 00, 05, 03, c4, 01, 0d, 00, 15, 01, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0a, 00, 2f, 00, 33, 0f, 01, 0d, 00, 0e]
+Raw bytes (36): 0x[01, 01, 03, 05, 0a, 01, 05, 01, 05, 05, 03, c4, 01, 0d, 00, 15, 01, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0a, 00, 2f, 00, 33, 03, 01, 0d, 00, 0e]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 4
+Number of expressions: 3
 - expression 0 operands: lhs = Counter(1), rhs = Expression(2, Sub)
 - expression 1 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 2 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 3 operands: lhs = Expression(0, Add), rhs = Zero
 Number of file 0 mappings: 5
 - Code(Expression(0, Add)) at (prev + 196, 13) to (start + 0, 21)
     = (c1 + (c0 - c1))
@@ -178,30 +132,27 @@ Number of file 0 mappings: 5
 - Code(Counter(1)) at (prev + 1, 30) to (start + 0, 37)
 - Code(Expression(2, Sub)) at (prev + 0, 47) to (start + 0, 51)
     = (c0 - c1)
-- Code(Expression(3, Add)) at (prev + 1, 13) to (start + 0, 14)
-    = ((c1 + (c0 - c1)) + Zero)
+- Code(Expression(0, Add)) at (prev + 1, 13) to (start + 0, 14)
+    = (c1 + (c0 - c1))
 
 Function name: closure::main::{closure#17}
-Raw bytes (45): 0x[01, 01, 05, 05, 0e, 01, 05, 01, 00, 01, 05, 03, 00, 06, 01, cc, 01, 09, 00, 0a, 03, 01, 0d, 00, 15, 0b, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0e, 00, 2f, 00, 33, 13, 02, 09, 00, 0a]
+Raw bytes (41): 0x[01, 01, 03, 05, 0a, 01, 05, 01, 05, 06, 01, cc, 01, 09, 00, 0a, 03, 01, 0d, 00, 15, 01, 01, 11, 01, 1b, 05, 01, 1e, 00, 25, 0a, 00, 2f, 00, 33, 03, 02, 09, 00, 0a]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
-- expression 0 operands: lhs = Counter(1), rhs = Expression(3, Sub)
+Number of expressions: 3
+- expression 0 operands: lhs = Counter(1), rhs = Expression(2, Sub)
 - expression 1 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 2 operands: lhs = Counter(0), rhs = Zero
-- expression 3 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 4 operands: lhs = Expression(0, Add), rhs = Zero
+- expression 2 operands: lhs = Counter(0), rhs = Counter(1)
 Number of file 0 mappings: 6
 - Code(Counter(0)) at (prev + 204, 9) to (start + 0, 10)
 - Code(Expression(0, Add)) at (prev + 1, 13) to (start + 0, 21)
     = (c1 + (c0 - c1))
-- Code(Expression(2, Add)) at (prev + 1, 17) to (start + 1, 27)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 1, 17) to (start + 1, 27)
 - Code(Counter(1)) at (prev + 1, 30) to (start + 0, 37)
-- Code(Expression(3, Sub)) at (prev + 0, 47) to (start + 0, 51)
+- Code(Expression(2, Sub)) at (prev + 0, 47) to (start + 0, 51)
     = (c0 - c1)
-- Code(Expression(4, Add)) at (prev + 2, 9) to (start + 0, 10)
-    = ((c1 + (c0 - c1)) + Zero)
+- Code(Expression(0, Add)) at (prev + 2, 9) to (start + 0, 10)
+    = (c1 + (c0 - c1))
 
 Function name: closure::main::{closure#18}
 Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 18, 0d, 02, 1c, 05, 02, 1d, 02, 12, 02, 02, 12, 00, 13, 07, 01, 11, 01, 0e]
@@ -264,23 +215,23 @@ Number of file 0 mappings: 4
     = (c1 + (c0 - c1))
 
 Function name: closure::main::{closure#3} (unused)
-Raw bytes (25): 0x[01, 01, 00, 04, 01, 80, 01, 05, 01, 14, 00, 01, 15, 02, 0a, 00, 02, 0a, 00, 0b, 00, 01, 09, 01, 06]
+Raw bytes (25): 0x[01, 01, 00, 04, 00, 80, 01, 05, 01, 14, 00, 01, 15, 02, 0a, 00, 02, 0a, 00, 0b, 00, 01, 09, 01, 06]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 128, 5) to (start + 1, 20)
+- Code(Zero) at (prev + 128, 5) to (start + 1, 20)
 - Code(Zero) at (prev + 1, 21) to (start + 2, 10)
 - Code(Zero) at (prev + 2, 10) to (start + 0, 11)
 - Code(Zero) at (prev + 1, 9) to (start + 1, 6)
 
 Function name: closure::main::{closure#4} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, 88, 01, 35, 00, 43]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, 88, 01, 35, 00, 43]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 136, 53) to (start + 0, 67)
+- Code(Zero) at (prev + 136, 53) to (start + 0, 67)
 
 Function name: closure::main::{closure#5}
 Raw bytes (10): 0x[01, 01, 00, 01, 01, 8b, 01, 3d, 00, 4f]
@@ -299,26 +250,26 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 140, 65) to (start + 0, 87)
 
 Function name: closure::main::{closure#7} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, 8d, 01, 3b, 00, 51]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, 8d, 01, 3b, 00, 51]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 141, 59) to (start + 0, 81)
+- Code(Zero) at (prev + 141, 59) to (start + 0, 81)
 
 Function name: closure::main::{closure#8} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, 92, 01, 3b, 00, 55]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, 92, 01, 3b, 00, 55]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 146, 59) to (start + 0, 85)
+- Code(Zero) at (prev + 146, 59) to (start + 0, 85)
 
 Function name: closure::main::{closure#9} (unused)
-Raw bytes (10): 0x[01, 01, 00, 01, 01, 94, 01, 38, 02, 06]
+Raw bytes (10): 0x[01, 01, 00, 01, 00, 94, 01, 38, 02, 06]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 148, 56) to (start + 2, 6)
+- Code(Zero) at (prev + 148, 56) to (start + 2, 6)
 
diff --git a/tests/coverage-map/status-quo/closure_bug.cov-map b/tests/coverage-map/status-quo/closure_bug.cov-map
index 4fe2e5ad243..90eeb1a6686 100644
--- a/tests/coverage-map/status-quo/closure_bug.cov-map
+++ b/tests/coverage-map/status-quo/closure_bug.cov-map
@@ -1,89 +1,74 @@
 Function name: closure_bug::main
-Raw bytes (241): 0x[01, 01, 34, 01, 00, 01, 05, 05, ce, 01, 01, 05, cb, 01, 00, 05, ce, 01, 01, 05, cb, 01, 09, 05, ce, 01, 01, 05, 09, c6, 01, cb, 01, 09, 05, ce, 01, 01, 05, c3, 01, 00, 09, c6, 01, cb, 01, 09, 05, ce, 01, 01, 05, c3, 01, 0d, 09, c6, 01, cb, 01, 09, 05, ce, 01, 01, 05, 0d, be, 01, c3, 01, 0d, 09, c6, 01, cb, 01, 09, 05, ce, 01, 01, 05, bb, 01, 00, 0d, be, 01, c3, 01, 0d, 09, c6, 01, cb, 01, 09, 05, ce, 01, 01, 05, bb, 01, 11, 0d, be, 01, c3, 01, 0d, 09, c6, 01, cb, 01, 09, 05, ce, 01, 01, 05, 11, b6, 01, bb, 01, 11, 0d, be, 01, c3, 01, 0d, 09, c6, 01, cb, 01, 09, 05, ce, 01, 01, 05, 11, 01, 06, 01, 03, 0a, 03, 09, 05, 01, 0e, 05, 01, 0f, 00, 17, ce, 01, 00, 17, 00, 18, cb, 01, 02, 09, 00, 0a, 13, 06, 05, 01, 0e, 09, 01, 0f, 00, 17, c6, 01, 00, 17, 00, 18, c3, 01, 02, 09, 00, 0a, 3b, 06, 05, 01, 0e, 0d, 01, 0f, 00, 17, be, 01, 00, 17, 00, 18, bb, 01, 02, 09, 00, 0a, 7b, 06, 05, 01, 0e, 11, 01, 0f, 00, 17, b6, 01, 00, 17, 00, 18, b3, 01, 01, 01, 00, 02]
+Raw bytes (201): 0x[01, 01, 26, 01, 05, 05, 02, 05, 02, 97, 01, 09, 05, 02, 09, 92, 01, 97, 01, 09, 05, 02, 09, 92, 01, 97, 01, 09, 05, 02, 8f, 01, 0d, 09, 92, 01, 97, 01, 09, 05, 02, 0d, 8a, 01, 8f, 01, 0d, 09, 92, 01, 97, 01, 09, 05, 02, 0d, 8a, 01, 8f, 01, 0d, 09, 92, 01, 97, 01, 09, 05, 02, 87, 01, 11, 0d, 8a, 01, 8f, 01, 0d, 09, 92, 01, 97, 01, 09, 05, 02, 11, 82, 01, 87, 01, 11, 0d, 8a, 01, 8f, 01, 0d, 09, 92, 01, 97, 01, 09, 05, 02, 11, 01, 06, 01, 03, 0a, 01, 09, 05, 01, 0e, 05, 01, 0f, 00, 17, 02, 00, 17, 00, 18, 97, 01, 02, 09, 00, 0a, 97, 01, 06, 05, 01, 0e, 09, 01, 0f, 00, 17, 92, 01, 00, 17, 00, 18, 8f, 01, 02, 09, 00, 0a, 8f, 01, 06, 05, 01, 0e, 0d, 01, 0f, 00, 17, 8a, 01, 00, 17, 00, 18, 87, 01, 02, 09, 00, 0a, 87, 01, 06, 05, 01, 0e, 11, 01, 0f, 00, 17, 82, 01, 00, 17, 00, 18, 7f, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 52
-- expression 0 operands: lhs = Counter(0), rhs = Zero
-- expression 1 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 2 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 3 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 4 operands: lhs = Expression(50, Add), rhs = Zero
-- expression 5 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 6 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 7 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 8 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 9 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 10 operands: lhs = Counter(2), rhs = Expression(49, Sub)
-- expression 11 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 12 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 13 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 14 operands: lhs = Expression(48, Add), rhs = Zero
-- expression 15 operands: lhs = Counter(2), rhs = Expression(49, Sub)
-- expression 16 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 17 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 18 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 19 operands: lhs = Expression(48, Add), rhs = Counter(3)
-- expression 20 operands: lhs = Counter(2), rhs = Expression(49, Sub)
-- expression 21 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 22 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 23 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 24 operands: lhs = Counter(3), rhs = Expression(47, Sub)
-- expression 25 operands: lhs = Expression(48, Add), rhs = Counter(3)
-- expression 26 operands: lhs = Counter(2), rhs = Expression(49, Sub)
-- expression 27 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 28 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 29 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 30 operands: lhs = Expression(46, Add), rhs = Zero
-- expression 31 operands: lhs = Counter(3), rhs = Expression(47, Sub)
-- expression 32 operands: lhs = Expression(48, Add), rhs = Counter(3)
-- expression 33 operands: lhs = Counter(2), rhs = Expression(49, Sub)
-- expression 34 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 35 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 36 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 37 operands: lhs = Expression(46, Add), rhs = Counter(4)
-- expression 38 operands: lhs = Counter(3), rhs = Expression(47, Sub)
-- expression 39 operands: lhs = Expression(48, Add), rhs = Counter(3)
-- expression 40 operands: lhs = Counter(2), rhs = Expression(49, Sub)
-- expression 41 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 42 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 43 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 44 operands: lhs = Counter(4), rhs = Expression(45, Sub)
-- expression 45 operands: lhs = Expression(46, Add), rhs = Counter(4)
-- expression 46 operands: lhs = Counter(3), rhs = Expression(47, Sub)
-- expression 47 operands: lhs = Expression(48, Add), rhs = Counter(3)
-- expression 48 operands: lhs = Counter(2), rhs = Expression(49, Sub)
-- expression 49 operands: lhs = Expression(50, Add), rhs = Counter(2)
-- expression 50 operands: lhs = Counter(1), rhs = Expression(51, Sub)
-- expression 51 operands: lhs = Counter(0), rhs = Counter(1)
+Number of expressions: 38
+- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
+- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 2 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 3 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 4 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 5 operands: lhs = Counter(2), rhs = Expression(36, Sub)
+- expression 6 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 7 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 8 operands: lhs = Counter(2), rhs = Expression(36, Sub)
+- expression 9 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 10 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 11 operands: lhs = Expression(35, Add), rhs = Counter(3)
+- expression 12 operands: lhs = Counter(2), rhs = Expression(36, Sub)
+- expression 13 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 14 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 15 operands: lhs = Counter(3), rhs = Expression(34, Sub)
+- expression 16 operands: lhs = Expression(35, Add), rhs = Counter(3)
+- expression 17 operands: lhs = Counter(2), rhs = Expression(36, Sub)
+- expression 18 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 19 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 20 operands: lhs = Counter(3), rhs = Expression(34, Sub)
+- expression 21 operands: lhs = Expression(35, Add), rhs = Counter(3)
+- expression 22 operands: lhs = Counter(2), rhs = Expression(36, Sub)
+- expression 23 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 24 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 25 operands: lhs = Expression(33, Add), rhs = Counter(4)
+- expression 26 operands: lhs = Counter(3), rhs = Expression(34, Sub)
+- expression 27 operands: lhs = Expression(35, Add), rhs = Counter(3)
+- expression 28 operands: lhs = Counter(2), rhs = Expression(36, Sub)
+- expression 29 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 30 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 31 operands: lhs = Counter(4), rhs = Expression(32, Sub)
+- expression 32 operands: lhs = Expression(33, Add), rhs = Counter(4)
+- expression 33 operands: lhs = Counter(3), rhs = Expression(34, Sub)
+- expression 34 operands: lhs = Expression(35, Add), rhs = Counter(3)
+- expression 35 operands: lhs = Counter(2), rhs = Expression(36, Sub)
+- expression 36 operands: lhs = Expression(37, Add), rhs = Counter(2)
+- expression 37 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 17
 - Code(Counter(0)) at (prev + 6, 1) to (start + 3, 10)
-- Code(Expression(0, Add)) at (prev + 9, 5) to (start + 1, 14)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 9, 5) to (start + 1, 14)
 - Code(Counter(1)) at (prev + 1, 15) to (start + 0, 23)
-- Code(Expression(51, Sub)) at (prev + 0, 23) to (start + 0, 24)
+- Code(Expression(0, Sub)) at (prev + 0, 23) to (start + 0, 24)
     = (c0 - c1)
-- Code(Expression(50, Add)) at (prev + 2, 9) to (start + 0, 10)
+- Code(Expression(37, Add)) at (prev + 2, 9) to (start + 0, 10)
+    = (c1 + (c0 - c1))
+- Code(Expression(37, Add)) at (prev + 6, 5) to (start + 1, 14)
     = (c1 + (c0 - c1))
-- Code(Expression(4, Add)) at (prev + 6, 5) to (start + 1, 14)
-    = ((c1 + (c0 - c1)) + Zero)
 - Code(Counter(2)) at (prev + 1, 15) to (start + 0, 23)
-- Code(Expression(49, Sub)) at (prev + 0, 23) to (start + 0, 24)
+- Code(Expression(36, Sub)) at (prev + 0, 23) to (start + 0, 24)
     = ((c1 + (c0 - c1)) - c2)
-- Code(Expression(48, Add)) at (prev + 2, 9) to (start + 0, 10)
+- Code(Expression(35, Add)) at (prev + 2, 9) to (start + 0, 10)
+    = (c2 + ((c1 + (c0 - c1)) - c2))
+- Code(Expression(35, Add)) at (prev + 6, 5) to (start + 1, 14)
     = (c2 + ((c1 + (c0 - c1)) - c2))
-- Code(Expression(14, Add)) at (prev + 6, 5) to (start + 1, 14)
-    = ((c2 + ((c1 + (c0 - c1)) - c2)) + Zero)
 - Code(Counter(3)) at (prev + 1, 15) to (start + 0, 23)
-- Code(Expression(47, Sub)) at (prev + 0, 23) to (start + 0, 24)
+- Code(Expression(34, Sub)) at (prev + 0, 23) to (start + 0, 24)
     = ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)
-- Code(Expression(46, Add)) at (prev + 2, 9) to (start + 0, 10)
+- Code(Expression(33, Add)) at (prev + 2, 9) to (start + 0, 10)
+    = (c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3))
+- Code(Expression(33, Add)) at (prev + 6, 5) to (start + 1, 14)
     = (c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3))
-- Code(Expression(30, Add)) at (prev + 6, 5) to (start + 1, 14)
-    = ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) + Zero)
 - Code(Counter(4)) at (prev + 1, 15) to (start + 0, 23)
-- Code(Expression(45, Sub)) at (prev + 0, 23) to (start + 0, 24)
+- Code(Expression(32, Sub)) at (prev + 0, 23) to (start + 0, 24)
     = ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)
-- Code(Expression(44, Add)) at (prev + 1, 1) to (start + 0, 2)
+- Code(Expression(31, Add)) at (prev + 1, 1) to (start + 0, 2)
     = (c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4))
 
 Function name: closure_bug::main::{closure#0}
diff --git a/tests/coverage-map/status-quo/closure_macro.cov-map b/tests/coverage-map/status-quo/closure_macro.cov-map
index ac017eb4468..b02c7e2e4c6 100644
--- a/tests/coverage-map/status-quo/closure_macro.cov-map
+++ b/tests/coverage-map/status-quo/closure_macro.cov-map
@@ -7,27 +7,23 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 29, 1) to (start + 2, 2)
 
 Function name: closure_macro::main
-Raw bytes (49): 0x[01, 01, 05, 01, 05, 02, 00, 05, 00, 02, 00, 05, 02, 07, 01, 21, 01, 01, 21, 02, 02, 09, 00, 0f, 05, 00, 12, 00, 13, 07, 00, 12, 00, 13, 0b, 00, 54, 00, 55, 0f, 02, 09, 02, 0b, 13, 03, 01, 00, 02]
+Raw bytes (43): 0x[01, 01, 02, 01, 05, 05, 02, 07, 01, 21, 01, 01, 21, 02, 02, 09, 00, 0f, 05, 00, 12, 00, 13, 02, 00, 12, 00, 13, 05, 00, 54, 00, 55, 02, 02, 09, 02, 0b, 07, 03, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
+Number of expressions: 2
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Expression(0, Sub), rhs = Zero
-- expression 2 operands: lhs = Counter(1), rhs = Zero
-- expression 3 operands: lhs = Expression(0, Sub), rhs = Zero
-- expression 4 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 7
 - Code(Counter(0)) at (prev + 33, 1) to (start + 1, 33)
 - Code(Expression(0, Sub)) at (prev + 2, 9) to (start + 0, 15)
     = (c0 - c1)
 - Code(Counter(1)) at (prev + 0, 18) to (start + 0, 19)
-- Code(Expression(1, Add)) at (prev + 0, 18) to (start + 0, 19)
-    = ((c0 - c1) + Zero)
-- Code(Expression(2, Add)) at (prev + 0, 84) to (start + 0, 85)
-    = (c1 + Zero)
-- Code(Expression(3, Add)) at (prev + 2, 9) to (start + 2, 11)
-    = ((c0 - c1) + Zero)
-- Code(Expression(4, Add)) at (prev + 3, 1) to (start + 0, 2)
+- Code(Expression(0, Sub)) at (prev + 0, 18) to (start + 0, 19)
+    = (c0 - c1)
+- Code(Counter(1)) at (prev + 0, 84) to (start + 0, 85)
+- Code(Expression(0, Sub)) at (prev + 2, 9) to (start + 2, 11)
+    = (c0 - c1)
+- Code(Expression(1, Add)) at (prev + 3, 1) to (start + 0, 2)
     = (c1 + (c0 - c1))
 
 Function name: closure_macro::main::{closure#0}
diff --git a/tests/coverage-map/status-quo/closure_macro_async.cov-map b/tests/coverage-map/status-quo/closure_macro_async.cov-map
index c9a142e5aeb..7f8666948d9 100644
--- a/tests/coverage-map/status-quo/closure_macro_async.cov-map
+++ b/tests/coverage-map/status-quo/closure_macro_async.cov-map
@@ -15,27 +15,23 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 33, 1) to (start + 0, 43)
 
 Function name: closure_macro_async::test::{closure#0}
-Raw bytes (49): 0x[01, 01, 05, 01, 05, 02, 00, 05, 00, 02, 00, 05, 02, 07, 01, 21, 2b, 01, 21, 02, 02, 09, 00, 0f, 05, 00, 12, 00, 13, 07, 00, 12, 00, 13, 0b, 00, 54, 00, 55, 0f, 02, 09, 02, 0b, 13, 03, 01, 00, 02]
+Raw bytes (43): 0x[01, 01, 02, 01, 05, 05, 02, 07, 01, 21, 2b, 01, 21, 02, 02, 09, 00, 0f, 05, 00, 12, 00, 13, 02, 00, 12, 00, 13, 05, 00, 54, 00, 55, 02, 02, 09, 02, 0b, 07, 03, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
+Number of expressions: 2
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Expression(0, Sub), rhs = Zero
-- expression 2 operands: lhs = Counter(1), rhs = Zero
-- expression 3 operands: lhs = Expression(0, Sub), rhs = Zero
-- expression 4 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 7
 - Code(Counter(0)) at (prev + 33, 43) to (start + 1, 33)
 - Code(Expression(0, Sub)) at (prev + 2, 9) to (start + 0, 15)
     = (c0 - c1)
 - Code(Counter(1)) at (prev + 0, 18) to (start + 0, 19)
-- Code(Expression(1, Add)) at (prev + 0, 18) to (start + 0, 19)
-    = ((c0 - c1) + Zero)
-- Code(Expression(2, Add)) at (prev + 0, 84) to (start + 0, 85)
-    = (c1 + Zero)
-- Code(Expression(3, Add)) at (prev + 2, 9) to (start + 2, 11)
-    = ((c0 - c1) + Zero)
-- Code(Expression(4, Add)) at (prev + 3, 1) to (start + 0, 2)
+- Code(Expression(0, Sub)) at (prev + 0, 18) to (start + 0, 19)
+    = (c0 - c1)
+- Code(Counter(1)) at (prev + 0, 84) to (start + 0, 85)
+- Code(Expression(0, Sub)) at (prev + 2, 9) to (start + 2, 11)
+    = (c0 - c1)
+- Code(Expression(1, Add)) at (prev + 3, 1) to (start + 0, 2)
     = (c1 + (c0 - c1))
 
 Function name: closure_macro_async::test::{closure#0}::{closure#0}
diff --git a/tests/coverage-map/status-quo/conditions.cov-map b/tests/coverage-map/status-quo/conditions.cov-map
index d82b8389b4d..7600d2d96bd 100644
--- a/tests/coverage-map/status-quo/conditions.cov-map
+++ b/tests/coverage-map/status-quo/conditions.cov-map
@@ -1,14 +1,14 @@
 Function name: conditions::main
-Raw bytes (793): 0x[01, 01, 90, 01, 09, 33, 37, 41, 3b, 3d, 35, 39, 05, 00, bf, 04, 09, 05, 00, 0d, 35, 26, 39, 0d, 35, 3b, 3d, 35, 39, 37, 41, 3b, 3d, 35, 39, ba, 04, 0d, bf, 04, 09, 05, 00, 03, 00, 45, 00, 87, 01, 49, 45, 00, 82, 01, 31, 87, 01, 49, 45, 00, 7e, 4d, 82, 01, 31, 87, 01, 49, 45, 00, 7a, 51, 7e, 4d, 82, 01, 31, 87, 01, 49, 45, 00, ab, 01, 55, 4d, 51, a7, 01, 59, ab, 01, 55, 4d, 51, 49, a3, 01, a7, 01, 59, ab, 01, 55, 4d, 51, 61, 00, e7, 01, 65, 61, 00, e2, 01, 2d, e7, 01, 65, 61, 00, de, 01, 69, e2, 01, 2d, e7, 01, 65, 61, 00, da, 01, 6d, de, 01, 69, e2, 01, 2d, e7, 01, 65, 61, 00, 8f, 02, 71, 69, 6d, 8b, 02, 75, 8f, 02, 71, 69, 6d, 83, 02, 00, 65, 87, 02, 8b, 02, 75, 8f, 02, 71, 69, 6d, 7d, f3, 03, f7, 03, 8d, 01, fb, 03, 89, 01, 81, 01, 85, 01, 79, 00, db, 02, 7d, 79, 00, d6, 02, 29, db, 02, 7d, 79, 00, d2, 02, 81, 01, d6, 02, 29, db, 02, 7d, 79, 00, ce, 02, 85, 01, d2, 02, 81, 01, d6, 02, 29, db, 02, 7d, 79, 00, fb, 03, 89, 01, 81, 01, 85, 01, f7, 03, 8d, 01, fb, 03, 89, 01, 81, 01, 85, 01, 11, 9b, 04, 9f, 04, 21, a3, 04, 1d, 15, 19, ef, 03, 00, 7d, f3, 03, f7, 03, 8d, 01, fb, 03, 89, 01, 81, 01, 85, 01, ef, 03, 11, 7d, f3, 03, f7, 03, 8d, 01, fb, 03, 89, 01, 81, 01, 85, 01, ea, 03, 25, ef, 03, 11, 7d, f3, 03, f7, 03, 8d, 01, fb, 03, 89, 01, 81, 01, 85, 01, e6, 03, 15, ea, 03, 25, ef, 03, 11, 7d, f3, 03, f7, 03, 8d, 01, fb, 03, 89, 01, 81, 01, 85, 01, e2, 03, 19, e6, 03, 15, ea, 03, 25, ef, 03, 11, 7d, f3, 03, f7, 03, 8d, 01, fb, 03, 89, 01, 81, 01, 85, 01, a3, 04, 1d, 15, 19, 9f, 04, 21, a3, 04, 1d, 15, 19, 97, 04, a7, 04, 11, 9b, 04, 9f, 04, 21, a3, 04, 1d, 15, 19, ab, 04, b6, 04, af, 04, b3, 04, 25, 29, 2d, 31, ba, 04, 0d, bf, 04, 09, 05, 00, 44, 01, 03, 01, 02, 0c, 05, 02, 0d, 02, 06, 00, 02, 06, 00, 07, 03, 03, 09, 00, 0a, bf, 04, 00, 10, 00, 1d, 09, 01, 09, 01, 0a, ba, 04, 02, 0f, 00, 1c, 0d, 01, 0c, 00, 19, 26, 00, 1d, 00, 2a, 22, 00, 2e, 00, 3c, 37, 00, 3d, 02, 0a, 41, 02, 0a, 00, 0b, 33, 01, 09, 01, 12, b6, 04, 03, 09, 00, 0f, 4b, 03, 09, 01, 0c, 45, 01, 0d, 02, 06, 00, 02, 06, 00, 07, 87, 01, 02, 08, 00, 15, 49, 00, 16, 02, 06, 82, 01, 02, 0f, 00, 1c, 7e, 01, 0c, 00, 19, 7a, 00, 1d, 00, 2a, 76, 00, 2e, 00, 3c, a7, 01, 00, 3d, 02, 0a, 59, 02, 0a, 00, 0b, a3, 01, 01, 09, 00, 17, 31, 02, 09, 00, 0f, 9f, 01, 03, 08, 00, 0c, 5d, 01, 0d, 01, 10, 61, 01, 11, 02, 0a, 00, 02, 0a, 00, 0b, e7, 01, 02, 0c, 00, 19, 65, 00, 1a, 02, 0a, e2, 01, 03, 11, 00, 1e, de, 01, 01, 10, 00, 1d, da, 01, 00, 21, 00, 2e, d6, 01, 00, 32, 00, 40, 8b, 02, 00, 41, 02, 0e, 75, 02, 0e, 00, 0f, 87, 02, 01, 0d, 00, 1b, 2d, 02, 0d, 00, 13, 00, 02, 06, 00, 07, ff, 01, 02, 09, 01, 0c, 79, 01, 0d, 02, 06, 00, 02, 06, 00, 07, ef, 03, 02, 09, 00, 0a, db, 02, 00, 10, 00, 1d, 7d, 00, 1e, 02, 06, d6, 02, 02, 0f, 00, 1c, d2, 02, 01, 0c, 00, 19, ce, 02, 00, 1d, 00, 2a, ca, 02, 00, 2e, 00, 3c, f7, 03, 00, 3d, 02, 0a, 8d, 01, 02, 0a, 00, 0b, f3, 03, 01, 09, 00, 17, 29, 02, 0d, 02, 0f, 97, 04, 05, 09, 00, 0a, 83, 03, 00, 10, 00, 1d, 11, 00, 1e, 02, 06, ea, 03, 02, 0f, 00, 1c, e6, 03, 01, 0c, 00, 19, e2, 03, 00, 1d, 00, 2a, de, 03, 00, 2e, 00, 3c, 9f, 04, 00, 3d, 02, 0a, 21, 02, 0a, 00, 0b, 9b, 04, 01, 09, 00, 17, 25, 02, 09, 00, 0f, 93, 04, 02, 01, 00, 02]
+Raw bytes (784): 0x[01, 01, 8e, 01, 09, 33, 37, 41, 3b, 3d, 35, 39, 05, 00, b7, 04, 09, 05, 00, 0d, 35, 26, 39, 0d, 35, 3b, 3d, 35, 39, 37, 41, 3b, 3d, 35, 39, b2, 04, 0d, b7, 04, 09, 05, 00, 45, 00, 83, 01, 49, 45, 00, 7e, 31, 83, 01, 49, 45, 00, 7a, 4d, 7e, 31, 83, 01, 49, 45, 00, 76, 51, 7a, 4d, 7e, 31, 83, 01, 49, 45, 00, a7, 01, 55, 4d, 51, a3, 01, 59, a7, 01, 55, 4d, 51, 49, 9f, 01, a3, 01, 59, a7, 01, 55, 4d, 51, 61, 00, e3, 01, 65, 61, 00, de, 01, 2d, e3, 01, 65, 61, 00, da, 01, 69, de, 01, 2d, e3, 01, 65, 61, 00, d6, 01, 6d, da, 01, 69, de, 01, 2d, e3, 01, 65, 61, 00, 8b, 02, 71, 69, 6d, 87, 02, 75, 8b, 02, 71, 69, 6d, ff, 01, 00, 65, 83, 02, 87, 02, 75, 8b, 02, 71, 69, 6d, 7d, eb, 03, ef, 03, 8d, 01, f3, 03, 89, 01, 81, 01, 85, 01, 79, 00, d7, 02, 7d, 79, 00, d2, 02, 29, d7, 02, 7d, 79, 00, ce, 02, 81, 01, d2, 02, 29, d7, 02, 7d, 79, 00, ca, 02, 85, 01, ce, 02, 81, 01, d2, 02, 29, d7, 02, 7d, 79, 00, f3, 03, 89, 01, 81, 01, 85, 01, ef, 03, 8d, 01, f3, 03, 89, 01, 81, 01, 85, 01, 11, 93, 04, 97, 04, 21, 9b, 04, 1d, 15, 19, 7d, eb, 03, ef, 03, 8d, 01, f3, 03, 89, 01, 81, 01, 85, 01, e7, 03, 11, 7d, eb, 03, ef, 03, 8d, 01, f3, 03, 89, 01, 81, 01, 85, 01, e2, 03, 25, e7, 03, 11, 7d, eb, 03, ef, 03, 8d, 01, f3, 03, 89, 01, 81, 01, 85, 01, de, 03, 15, e2, 03, 25, e7, 03, 11, 7d, eb, 03, ef, 03, 8d, 01, f3, 03, 89, 01, 81, 01, 85, 01, da, 03, 19, de, 03, 15, e2, 03, 25, e7, 03, 11, 7d, eb, 03, ef, 03, 8d, 01, f3, 03, 89, 01, 81, 01, 85, 01, 9b, 04, 1d, 15, 19, 97, 04, 21, 9b, 04, 1d, 15, 19, 8f, 04, 9f, 04, 11, 93, 04, 97, 04, 21, 9b, 04, 1d, 15, 19, a3, 04, ae, 04, a7, 04, ab, 04, 25, 29, 2d, 31, b2, 04, 0d, b7, 04, 09, 05, 00, 44, 01, 03, 01, 02, 0c, 05, 02, 0d, 02, 06, 00, 02, 06, 00, 07, 03, 03, 09, 00, 0a, b7, 04, 00, 10, 00, 1d, 09, 01, 09, 01, 0a, b2, 04, 02, 0f, 00, 1c, 0d, 01, 0c, 00, 19, 26, 00, 1d, 00, 2a, 22, 00, 2e, 00, 3c, 37, 00, 3d, 02, 0a, 41, 02, 0a, 00, 0b, 33, 01, 09, 01, 12, ae, 04, 03, 09, 00, 0f, 03, 03, 09, 01, 0c, 45, 01, 0d, 02, 06, 00, 02, 06, 00, 07, 83, 01, 02, 08, 00, 15, 49, 00, 16, 02, 06, 7e, 02, 0f, 00, 1c, 7a, 01, 0c, 00, 19, 76, 00, 1d, 00, 2a, 72, 00, 2e, 00, 3c, a3, 01, 00, 3d, 02, 0a, 59, 02, 0a, 00, 0b, 9f, 01, 01, 09, 00, 17, 31, 02, 09, 00, 0f, 9b, 01, 03, 08, 00, 0c, 5d, 01, 0d, 01, 10, 61, 01, 11, 02, 0a, 00, 02, 0a, 00, 0b, e3, 01, 02, 0c, 00, 19, 65, 00, 1a, 02, 0a, de, 01, 03, 11, 00, 1e, da, 01, 01, 10, 00, 1d, d6, 01, 00, 21, 00, 2e, d2, 01, 00, 32, 00, 40, 87, 02, 00, 41, 02, 0e, 75, 02, 0e, 00, 0f, 83, 02, 01, 0d, 00, 1b, 2d, 02, 0d, 00, 13, 00, 02, 06, 00, 07, fb, 01, 02, 09, 01, 0c, 79, 01, 0d, 02, 06, 00, 02, 06, 00, 07, e7, 03, 02, 09, 00, 0a, d7, 02, 00, 10, 00, 1d, 7d, 00, 1e, 02, 06, d2, 02, 02, 0f, 00, 1c, ce, 02, 01, 0c, 00, 19, ca, 02, 00, 1d, 00, 2a, c6, 02, 00, 2e, 00, 3c, ef, 03, 00, 3d, 02, 0a, 8d, 01, 02, 0a, 00, 0b, eb, 03, 01, 09, 00, 17, 29, 02, 0d, 02, 0f, 8f, 04, 05, 09, 00, 0a, e7, 03, 00, 10, 00, 1d, 11, 00, 1e, 02, 06, e2, 03, 02, 0f, 00, 1c, de, 03, 01, 0c, 00, 19, da, 03, 00, 1d, 00, 2a, d6, 03, 00, 2e, 00, 3c, 97, 04, 00, 3d, 02, 0a, 21, 02, 0a, 00, 0b, 93, 04, 01, 09, 00, 17, 25, 02, 09, 00, 0f, 8b, 04, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 144
+Number of expressions: 142
 - expression 0 operands: lhs = Counter(2), rhs = Expression(12, Add)
 - expression 1 operands: lhs = Expression(13, Add), rhs = Counter(16)
 - expression 2 operands: lhs = Expression(14, Add), rhs = Counter(15)
 - expression 3 operands: lhs = Counter(13), rhs = Counter(14)
 - expression 4 operands: lhs = Counter(1), rhs = Zero
-- expression 5 operands: lhs = Expression(143, Add), rhs = Counter(2)
+- expression 5 operands: lhs = Expression(141, Add), rhs = Counter(2)
 - expression 6 operands: lhs = Counter(1), rhs = Zero
 - expression 7 operands: lhs = Counter(3), rhs = Counter(13)
 - expression 8 operands: lhs = Expression(9, Sub), rhs = Counter(14)
@@ -18,145 +18,143 @@ Number of expressions: 144
 - expression 12 operands: lhs = Expression(13, Add), rhs = Counter(16)
 - expression 13 operands: lhs = Expression(14, Add), rhs = Counter(15)
 - expression 14 operands: lhs = Counter(13), rhs = Counter(14)
-- expression 15 operands: lhs = Expression(142, Sub), rhs = Counter(3)
-- expression 16 operands: lhs = Expression(143, Add), rhs = Counter(2)
+- expression 15 operands: lhs = Expression(140, Sub), rhs = Counter(3)
+- expression 16 operands: lhs = Expression(141, Add), rhs = Counter(2)
 - expression 17 operands: lhs = Counter(1), rhs = Zero
-- expression 18 operands: lhs = Expression(0, Add), rhs = Zero
-- expression 19 operands: lhs = Counter(17), rhs = Zero
-- expression 20 operands: lhs = Expression(33, Add), rhs = Counter(18)
-- expression 21 operands: lhs = Counter(17), rhs = Zero
-- expression 22 operands: lhs = Expression(32, Sub), rhs = Counter(12)
-- expression 23 operands: lhs = Expression(33, Add), rhs = Counter(18)
-- expression 24 operands: lhs = Counter(17), rhs = Zero
-- expression 25 operands: lhs = Expression(31, Sub), rhs = Counter(19)
-- expression 26 operands: lhs = Expression(32, Sub), rhs = Counter(12)
-- expression 27 operands: lhs = Expression(33, Add), rhs = Counter(18)
-- expression 28 operands: lhs = Counter(17), rhs = Zero
-- expression 29 operands: lhs = Expression(30, Sub), rhs = Counter(20)
-- expression 30 operands: lhs = Expression(31, Sub), rhs = Counter(19)
-- expression 31 operands: lhs = Expression(32, Sub), rhs = Counter(12)
-- expression 32 operands: lhs = Expression(33, Add), rhs = Counter(18)
-- expression 33 operands: lhs = Counter(17), rhs = Zero
-- expression 34 operands: lhs = Expression(42, Add), rhs = Counter(21)
-- expression 35 operands: lhs = Counter(19), rhs = Counter(20)
-- expression 36 operands: lhs = Expression(41, Add), rhs = Counter(22)
-- expression 37 operands: lhs = Expression(42, Add), rhs = Counter(21)
-- expression 38 operands: lhs = Counter(19), rhs = Counter(20)
-- expression 39 operands: lhs = Counter(18), rhs = Expression(40, Add)
-- expression 40 operands: lhs = Expression(41, Add), rhs = Counter(22)
-- expression 41 operands: lhs = Expression(42, Add), rhs = Counter(21)
-- expression 42 operands: lhs = Counter(19), rhs = Counter(20)
-- expression 43 operands: lhs = Counter(24), rhs = Zero
-- expression 44 operands: lhs = Expression(57, Add), rhs = Counter(25)
-- expression 45 operands: lhs = Counter(24), rhs = Zero
-- expression 46 operands: lhs = Expression(56, Sub), rhs = Counter(11)
-- expression 47 operands: lhs = Expression(57, Add), rhs = Counter(25)
-- expression 48 operands: lhs = Counter(24), rhs = Zero
-- expression 49 operands: lhs = Expression(55, Sub), rhs = Counter(26)
-- expression 50 operands: lhs = Expression(56, Sub), rhs = Counter(11)
-- expression 51 operands: lhs = Expression(57, Add), rhs = Counter(25)
-- expression 52 operands: lhs = Counter(24), rhs = Zero
-- expression 53 operands: lhs = Expression(54, Sub), rhs = Counter(27)
-- expression 54 operands: lhs = Expression(55, Sub), rhs = Counter(26)
-- expression 55 operands: lhs = Expression(56, Sub), rhs = Counter(11)
-- expression 56 operands: lhs = Expression(57, Add), rhs = Counter(25)
-- expression 57 operands: lhs = Counter(24), rhs = Zero
-- expression 58 operands: lhs = Expression(67, Add), rhs = Counter(28)
-- expression 59 operands: lhs = Counter(26), rhs = Counter(27)
-- expression 60 operands: lhs = Expression(66, Add), rhs = Counter(29)
-- expression 61 operands: lhs = Expression(67, Add), rhs = Counter(28)
-- expression 62 operands: lhs = Counter(26), rhs = Counter(27)
-- expression 63 operands: lhs = Expression(64, Add), rhs = Zero
-- expression 64 operands: lhs = Counter(25), rhs = Expression(65, Add)
-- expression 65 operands: lhs = Expression(66, Add), rhs = Counter(29)
-- expression 66 operands: lhs = Expression(67, Add), rhs = Counter(28)
-- expression 67 operands: lhs = Counter(26), rhs = Counter(27)
-- expression 68 operands: lhs = Counter(31), rhs = Expression(124, Add)
-- expression 69 operands: lhs = Expression(125, Add), rhs = Counter(35)
-- expression 70 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 71 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 72 operands: lhs = Counter(30), rhs = Zero
-- expression 73 operands: lhs = Expression(86, Add), rhs = Counter(31)
-- expression 74 operands: lhs = Counter(30), rhs = Zero
-- expression 75 operands: lhs = Expression(85, Sub), rhs = Counter(10)
-- expression 76 operands: lhs = Expression(86, Add), rhs = Counter(31)
-- expression 77 operands: lhs = Counter(30), rhs = Zero
-- expression 78 operands: lhs = Expression(84, Sub), rhs = Counter(32)
-- expression 79 operands: lhs = Expression(85, Sub), rhs = Counter(10)
-- expression 80 operands: lhs = Expression(86, Add), rhs = Counter(31)
-- expression 81 operands: lhs = Counter(30), rhs = Zero
-- expression 82 operands: lhs = Expression(83, Sub), rhs = Counter(33)
-- expression 83 operands: lhs = Expression(84, Sub), rhs = Counter(32)
-- expression 84 operands: lhs = Expression(85, Sub), rhs = Counter(10)
-- expression 85 operands: lhs = Expression(86, Add), rhs = Counter(31)
-- expression 86 operands: lhs = Counter(30), rhs = Zero
-- expression 87 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 88 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 89 operands: lhs = Expression(125, Add), rhs = Counter(35)
-- expression 90 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 91 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 92 operands: lhs = Counter(4), rhs = Expression(134, Add)
-- expression 93 operands: lhs = Expression(135, Add), rhs = Counter(8)
-- expression 94 operands: lhs = Expression(136, Add), rhs = Counter(7)
-- expression 95 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 96 operands: lhs = Expression(123, Add), rhs = Zero
-- expression 97 operands: lhs = Counter(31), rhs = Expression(124, Add)
-- expression 98 operands: lhs = Expression(125, Add), rhs = Counter(35)
-- expression 99 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 100 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 101 operands: lhs = Expression(123, Add), rhs = Counter(4)
-- expression 102 operands: lhs = Counter(31), rhs = Expression(124, Add)
-- expression 103 operands: lhs = Expression(125, Add), rhs = Counter(35)
-- expression 104 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 105 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 106 operands: lhs = Expression(122, Sub), rhs = Counter(9)
-- expression 107 operands: lhs = Expression(123, Add), rhs = Counter(4)
-- expression 108 operands: lhs = Counter(31), rhs = Expression(124, Add)
-- expression 109 operands: lhs = Expression(125, Add), rhs = Counter(35)
-- expression 110 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 111 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 112 operands: lhs = Expression(121, Sub), rhs = Counter(5)
-- expression 113 operands: lhs = Expression(122, Sub), rhs = Counter(9)
-- expression 114 operands: lhs = Expression(123, Add), rhs = Counter(4)
-- expression 115 operands: lhs = Counter(31), rhs = Expression(124, Add)
-- expression 116 operands: lhs = Expression(125, Add), rhs = Counter(35)
-- expression 117 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 118 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 119 operands: lhs = Expression(120, Sub), rhs = Counter(6)
-- expression 120 operands: lhs = Expression(121, Sub), rhs = Counter(5)
-- expression 121 operands: lhs = Expression(122, Sub), rhs = Counter(9)
-- expression 122 operands: lhs = Expression(123, Add), rhs = Counter(4)
-- expression 123 operands: lhs = Counter(31), rhs = Expression(124, Add)
-- expression 124 operands: lhs = Expression(125, Add), rhs = Counter(35)
-- expression 125 operands: lhs = Expression(126, Add), rhs = Counter(34)
-- expression 126 operands: lhs = Counter(32), rhs = Counter(33)
-- expression 127 operands: lhs = Expression(136, Add), rhs = Counter(7)
-- expression 128 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 129 operands: lhs = Expression(135, Add), rhs = Counter(8)
-- expression 130 operands: lhs = Expression(136, Add), rhs = Counter(7)
-- expression 131 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 132 operands: lhs = Expression(133, Add), rhs = Expression(137, Add)
-- expression 133 operands: lhs = Counter(4), rhs = Expression(134, Add)
-- expression 134 operands: lhs = Expression(135, Add), rhs = Counter(8)
-- expression 135 operands: lhs = Expression(136, Add), rhs = Counter(7)
-- expression 136 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 137 operands: lhs = Expression(138, Add), rhs = Expression(141, Sub)
-- expression 138 operands: lhs = Expression(139, Add), rhs = Expression(140, Add)
-- expression 139 operands: lhs = Counter(9), rhs = Counter(10)
-- expression 140 operands: lhs = Counter(11), rhs = Counter(12)
-- expression 141 operands: lhs = Expression(142, Sub), rhs = Counter(3)
-- expression 142 operands: lhs = Expression(143, Add), rhs = Counter(2)
-- expression 143 operands: lhs = Counter(1), rhs = Zero
+- expression 18 operands: lhs = Counter(17), rhs = Zero
+- expression 19 operands: lhs = Expression(32, Add), rhs = Counter(18)
+- expression 20 operands: lhs = Counter(17), rhs = Zero
+- expression 21 operands: lhs = Expression(31, Sub), rhs = Counter(12)
+- expression 22 operands: lhs = Expression(32, Add), rhs = Counter(18)
+- expression 23 operands: lhs = Counter(17), rhs = Zero
+- expression 24 operands: lhs = Expression(30, Sub), rhs = Counter(19)
+- expression 25 operands: lhs = Expression(31, Sub), rhs = Counter(12)
+- expression 26 operands: lhs = Expression(32, Add), rhs = Counter(18)
+- expression 27 operands: lhs = Counter(17), rhs = Zero
+- expression 28 operands: lhs = Expression(29, Sub), rhs = Counter(20)
+- expression 29 operands: lhs = Expression(30, Sub), rhs = Counter(19)
+- expression 30 operands: lhs = Expression(31, Sub), rhs = Counter(12)
+- expression 31 operands: lhs = Expression(32, Add), rhs = Counter(18)
+- expression 32 operands: lhs = Counter(17), rhs = Zero
+- expression 33 operands: lhs = Expression(41, Add), rhs = Counter(21)
+- expression 34 operands: lhs = Counter(19), rhs = Counter(20)
+- expression 35 operands: lhs = Expression(40, Add), rhs = Counter(22)
+- expression 36 operands: lhs = Expression(41, Add), rhs = Counter(21)
+- expression 37 operands: lhs = Counter(19), rhs = Counter(20)
+- expression 38 operands: lhs = Counter(18), rhs = Expression(39, Add)
+- expression 39 operands: lhs = Expression(40, Add), rhs = Counter(22)
+- expression 40 operands: lhs = Expression(41, Add), rhs = Counter(21)
+- expression 41 operands: lhs = Counter(19), rhs = Counter(20)
+- expression 42 operands: lhs = Counter(24), rhs = Zero
+- expression 43 operands: lhs = Expression(56, Add), rhs = Counter(25)
+- expression 44 operands: lhs = Counter(24), rhs = Zero
+- expression 45 operands: lhs = Expression(55, Sub), rhs = Counter(11)
+- expression 46 operands: lhs = Expression(56, Add), rhs = Counter(25)
+- expression 47 operands: lhs = Counter(24), rhs = Zero
+- expression 48 operands: lhs = Expression(54, Sub), rhs = Counter(26)
+- expression 49 operands: lhs = Expression(55, Sub), rhs = Counter(11)
+- expression 50 operands: lhs = Expression(56, Add), rhs = Counter(25)
+- expression 51 operands: lhs = Counter(24), rhs = Zero
+- expression 52 operands: lhs = Expression(53, Sub), rhs = Counter(27)
+- expression 53 operands: lhs = Expression(54, Sub), rhs = Counter(26)
+- expression 54 operands: lhs = Expression(55, Sub), rhs = Counter(11)
+- expression 55 operands: lhs = Expression(56, Add), rhs = Counter(25)
+- expression 56 operands: lhs = Counter(24), rhs = Zero
+- expression 57 operands: lhs = Expression(66, Add), rhs = Counter(28)
+- expression 58 operands: lhs = Counter(26), rhs = Counter(27)
+- expression 59 operands: lhs = Expression(65, Add), rhs = Counter(29)
+- expression 60 operands: lhs = Expression(66, Add), rhs = Counter(28)
+- expression 61 operands: lhs = Counter(26), rhs = Counter(27)
+- expression 62 operands: lhs = Expression(63, Add), rhs = Zero
+- expression 63 operands: lhs = Counter(25), rhs = Expression(64, Add)
+- expression 64 operands: lhs = Expression(65, Add), rhs = Counter(29)
+- expression 65 operands: lhs = Expression(66, Add), rhs = Counter(28)
+- expression 66 operands: lhs = Counter(26), rhs = Counter(27)
+- expression 67 operands: lhs = Counter(31), rhs = Expression(122, Add)
+- expression 68 operands: lhs = Expression(123, Add), rhs = Counter(35)
+- expression 69 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 70 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 71 operands: lhs = Counter(30), rhs = Zero
+- expression 72 operands: lhs = Expression(85, Add), rhs = Counter(31)
+- expression 73 operands: lhs = Counter(30), rhs = Zero
+- expression 74 operands: lhs = Expression(84, Sub), rhs = Counter(10)
+- expression 75 operands: lhs = Expression(85, Add), rhs = Counter(31)
+- expression 76 operands: lhs = Counter(30), rhs = Zero
+- expression 77 operands: lhs = Expression(83, Sub), rhs = Counter(32)
+- expression 78 operands: lhs = Expression(84, Sub), rhs = Counter(10)
+- expression 79 operands: lhs = Expression(85, Add), rhs = Counter(31)
+- expression 80 operands: lhs = Counter(30), rhs = Zero
+- expression 81 operands: lhs = Expression(82, Sub), rhs = Counter(33)
+- expression 82 operands: lhs = Expression(83, Sub), rhs = Counter(32)
+- expression 83 operands: lhs = Expression(84, Sub), rhs = Counter(10)
+- expression 84 operands: lhs = Expression(85, Add), rhs = Counter(31)
+- expression 85 operands: lhs = Counter(30), rhs = Zero
+- expression 86 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 87 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 88 operands: lhs = Expression(123, Add), rhs = Counter(35)
+- expression 89 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 90 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 91 operands: lhs = Counter(4), rhs = Expression(132, Add)
+- expression 92 operands: lhs = Expression(133, Add), rhs = Counter(8)
+- expression 93 operands: lhs = Expression(134, Add), rhs = Counter(7)
+- expression 94 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 95 operands: lhs = Counter(31), rhs = Expression(122, Add)
+- expression 96 operands: lhs = Expression(123, Add), rhs = Counter(35)
+- expression 97 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 98 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 99 operands: lhs = Expression(121, Add), rhs = Counter(4)
+- expression 100 operands: lhs = Counter(31), rhs = Expression(122, Add)
+- expression 101 operands: lhs = Expression(123, Add), rhs = Counter(35)
+- expression 102 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 103 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 104 operands: lhs = Expression(120, Sub), rhs = Counter(9)
+- expression 105 operands: lhs = Expression(121, Add), rhs = Counter(4)
+- expression 106 operands: lhs = Counter(31), rhs = Expression(122, Add)
+- expression 107 operands: lhs = Expression(123, Add), rhs = Counter(35)
+- expression 108 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 109 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 110 operands: lhs = Expression(119, Sub), rhs = Counter(5)
+- expression 111 operands: lhs = Expression(120, Sub), rhs = Counter(9)
+- expression 112 operands: lhs = Expression(121, Add), rhs = Counter(4)
+- expression 113 operands: lhs = Counter(31), rhs = Expression(122, Add)
+- expression 114 operands: lhs = Expression(123, Add), rhs = Counter(35)
+- expression 115 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 116 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 117 operands: lhs = Expression(118, Sub), rhs = Counter(6)
+- expression 118 operands: lhs = Expression(119, Sub), rhs = Counter(5)
+- expression 119 operands: lhs = Expression(120, Sub), rhs = Counter(9)
+- expression 120 operands: lhs = Expression(121, Add), rhs = Counter(4)
+- expression 121 operands: lhs = Counter(31), rhs = Expression(122, Add)
+- expression 122 operands: lhs = Expression(123, Add), rhs = Counter(35)
+- expression 123 operands: lhs = Expression(124, Add), rhs = Counter(34)
+- expression 124 operands: lhs = Counter(32), rhs = Counter(33)
+- expression 125 operands: lhs = Expression(134, Add), rhs = Counter(7)
+- expression 126 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 127 operands: lhs = Expression(133, Add), rhs = Counter(8)
+- expression 128 operands: lhs = Expression(134, Add), rhs = Counter(7)
+- expression 129 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 130 operands: lhs = Expression(131, Add), rhs = Expression(135, Add)
+- expression 131 operands: lhs = Counter(4), rhs = Expression(132, Add)
+- expression 132 operands: lhs = Expression(133, Add), rhs = Counter(8)
+- expression 133 operands: lhs = Expression(134, Add), rhs = Counter(7)
+- expression 134 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 135 operands: lhs = Expression(136, Add), rhs = Expression(139, Sub)
+- expression 136 operands: lhs = Expression(137, Add), rhs = Expression(138, Add)
+- expression 137 operands: lhs = Counter(9), rhs = Counter(10)
+- expression 138 operands: lhs = Counter(11), rhs = Counter(12)
+- expression 139 operands: lhs = Expression(140, Sub), rhs = Counter(3)
+- expression 140 operands: lhs = Expression(141, Add), rhs = Counter(2)
+- expression 141 operands: lhs = Counter(1), rhs = Zero
 Number of file 0 mappings: 68
 - Code(Counter(0)) at (prev + 3, 1) to (start + 2, 12)
 - Code(Counter(1)) at (prev + 2, 13) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
 - Code(Expression(0, Add)) at (prev + 3, 9) to (start + 0, 10)
     = (c2 + (((c13 + c14) + c15) + c16))
-- Code(Expression(143, Add)) at (prev + 0, 16) to (start + 0, 29)
+- Code(Expression(141, Add)) at (prev + 0, 16) to (start + 0, 29)
     = (c1 + Zero)
 - Code(Counter(2)) at (prev + 1, 9) to (start + 1, 10)
-- Code(Expression(142, Sub)) at (prev + 2, 15) to (start + 0, 28)
+- Code(Expression(140, Sub)) at (prev + 2, 15) to (start + 0, 28)
     = ((c1 + Zero) - c2)
 - Code(Counter(3)) at (prev + 1, 12) to (start + 0, 25)
 - Code(Expression(9, Sub)) at (prev + 0, 29) to (start + 0, 42)
@@ -168,94 +166,94 @@ Number of file 0 mappings: 68
 - Code(Counter(16)) at (prev + 2, 10) to (start + 0, 11)
 - Code(Expression(12, Add)) at (prev + 1, 9) to (start + 1, 18)
     = (((c13 + c14) + c15) + c16)
-- Code(Expression(141, Sub)) at (prev + 3, 9) to (start + 0, 15)
+- Code(Expression(139, Sub)) at (prev + 3, 9) to (start + 0, 15)
     = (((c1 + Zero) - c2) - c3)
-- Code(Expression(18, Add)) at (prev + 3, 9) to (start + 1, 12)
-    = ((c2 + (((c13 + c14) + c15) + c16)) + Zero)
+- Code(Expression(0, Add)) at (prev + 3, 9) to (start + 1, 12)
+    = (c2 + (((c13 + c14) + c15) + c16))
 - Code(Counter(17)) at (prev + 1, 13) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
-- Code(Expression(33, Add)) at (prev + 2, 8) to (start + 0, 21)
+- Code(Expression(32, Add)) at (prev + 2, 8) to (start + 0, 21)
     = (c17 + Zero)
 - Code(Counter(18)) at (prev + 0, 22) to (start + 2, 6)
-- Code(Expression(32, Sub)) at (prev + 2, 15) to (start + 0, 28)
+- Code(Expression(31, Sub)) at (prev + 2, 15) to (start + 0, 28)
     = ((c17 + Zero) - c18)
-- Code(Expression(31, Sub)) at (prev + 1, 12) to (start + 0, 25)
+- Code(Expression(30, Sub)) at (prev + 1, 12) to (start + 0, 25)
     = (((c17 + Zero) - c18) - c12)
-- Code(Expression(30, Sub)) at (prev + 0, 29) to (start + 0, 42)
+- Code(Expression(29, Sub)) at (prev + 0, 29) to (start + 0, 42)
     = ((((c17 + Zero) - c18) - c12) - c19)
-- Code(Expression(29, Sub)) at (prev + 0, 46) to (start + 0, 60)
+- Code(Expression(28, Sub)) at (prev + 0, 46) to (start + 0, 60)
     = (((((c17 + Zero) - c18) - c12) - c19) - c20)
-- Code(Expression(41, Add)) at (prev + 0, 61) to (start + 2, 10)
+- Code(Expression(40, Add)) at (prev + 0, 61) to (start + 2, 10)
     = ((c19 + c20) + c21)
 - Code(Counter(22)) at (prev + 2, 10) to (start + 0, 11)
-- Code(Expression(40, Add)) at (prev + 1, 9) to (start + 0, 23)
+- Code(Expression(39, Add)) at (prev + 1, 9) to (start + 0, 23)
     = (((c19 + c20) + c21) + c22)
 - Code(Counter(12)) at (prev + 2, 9) to (start + 0, 15)
-- Code(Expression(39, Add)) at (prev + 3, 8) to (start + 0, 12)
+- Code(Expression(38, Add)) at (prev + 3, 8) to (start + 0, 12)
     = (c18 + (((c19 + c20) + c21) + c22))
 - Code(Counter(23)) at (prev + 1, 13) to (start + 1, 16)
 - Code(Counter(24)) at (prev + 1, 17) to (start + 2, 10)
 - Code(Zero) at (prev + 2, 10) to (start + 0, 11)
-- Code(Expression(57, Add)) at (prev + 2, 12) to (start + 0, 25)
+- Code(Expression(56, Add)) at (prev + 2, 12) to (start + 0, 25)
     = (c24 + Zero)
 - Code(Counter(25)) at (prev + 0, 26) to (start + 2, 10)
-- Code(Expression(56, Sub)) at (prev + 3, 17) to (start + 0, 30)
+- Code(Expression(55, Sub)) at (prev + 3, 17) to (start + 0, 30)
     = ((c24 + Zero) - c25)
-- Code(Expression(55, Sub)) at (prev + 1, 16) to (start + 0, 29)
+- Code(Expression(54, Sub)) at (prev + 1, 16) to (start + 0, 29)
     = (((c24 + Zero) - c25) - c11)
-- Code(Expression(54, Sub)) at (prev + 0, 33) to (start + 0, 46)
+- Code(Expression(53, Sub)) at (prev + 0, 33) to (start + 0, 46)
     = ((((c24 + Zero) - c25) - c11) - c26)
-- Code(Expression(53, Sub)) at (prev + 0, 50) to (start + 0, 64)
+- Code(Expression(52, Sub)) at (prev + 0, 50) to (start + 0, 64)
     = (((((c24 + Zero) - c25) - c11) - c26) - c27)
-- Code(Expression(66, Add)) at (prev + 0, 65) to (start + 2, 14)
+- Code(Expression(65, Add)) at (prev + 0, 65) to (start + 2, 14)
     = ((c26 + c27) + c28)
 - Code(Counter(29)) at (prev + 2, 14) to (start + 0, 15)
-- Code(Expression(65, Add)) at (prev + 1, 13) to (start + 0, 27)
+- Code(Expression(64, Add)) at (prev + 1, 13) to (start + 0, 27)
     = (((c26 + c27) + c28) + c29)
 - Code(Counter(11)) at (prev + 2, 13) to (start + 0, 19)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
-- Code(Expression(63, Add)) at (prev + 2, 9) to (start + 1, 12)
+- Code(Expression(62, Add)) at (prev + 2, 9) to (start + 1, 12)
     = ((c25 + (((c26 + c27) + c28) + c29)) + Zero)
 - Code(Counter(30)) at (prev + 1, 13) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
-- Code(Expression(123, Add)) at (prev + 2, 9) to (start + 0, 10)
+- Code(Expression(121, Add)) at (prev + 2, 9) to (start + 0, 10)
     = (c31 + (((c32 + c33) + c34) + c35))
-- Code(Expression(86, Add)) at (prev + 0, 16) to (start + 0, 29)
+- Code(Expression(85, Add)) at (prev + 0, 16) to (start + 0, 29)
     = (c30 + Zero)
 - Code(Counter(31)) at (prev + 0, 30) to (start + 2, 6)
-- Code(Expression(85, Sub)) at (prev + 2, 15) to (start + 0, 28)
+- Code(Expression(84, Sub)) at (prev + 2, 15) to (start + 0, 28)
     = ((c30 + Zero) - c31)
-- Code(Expression(84, Sub)) at (prev + 1, 12) to (start + 0, 25)
+- Code(Expression(83, Sub)) at (prev + 1, 12) to (start + 0, 25)
     = (((c30 + Zero) - c31) - c10)
-- Code(Expression(83, Sub)) at (prev + 0, 29) to (start + 0, 42)
+- Code(Expression(82, Sub)) at (prev + 0, 29) to (start + 0, 42)
     = ((((c30 + Zero) - c31) - c10) - c32)
-- Code(Expression(82, Sub)) at (prev + 0, 46) to (start + 0, 60)
+- Code(Expression(81, Sub)) at (prev + 0, 46) to (start + 0, 60)
     = (((((c30 + Zero) - c31) - c10) - c32) - c33)
-- Code(Expression(125, Add)) at (prev + 0, 61) to (start + 2, 10)
+- Code(Expression(123, Add)) at (prev + 0, 61) to (start + 2, 10)
     = ((c32 + c33) + c34)
 - Code(Counter(35)) at (prev + 2, 10) to (start + 0, 11)
-- Code(Expression(124, Add)) at (prev + 1, 9) to (start + 0, 23)
+- Code(Expression(122, Add)) at (prev + 1, 9) to (start + 0, 23)
     = (((c32 + c33) + c34) + c35)
 - Code(Counter(10)) at (prev + 2, 13) to (start + 2, 15)
-- Code(Expression(133, Add)) at (prev + 5, 9) to (start + 0, 10)
+- Code(Expression(131, Add)) at (prev + 5, 9) to (start + 0, 10)
     = (c4 + (((c5 + c6) + c7) + c8))
-- Code(Expression(96, Add)) at (prev + 0, 16) to (start + 0, 29)
-    = ((c31 + (((c32 + c33) + c34) + c35)) + Zero)
+- Code(Expression(121, Add)) at (prev + 0, 16) to (start + 0, 29)
+    = (c31 + (((c32 + c33) + c34) + c35))
 - Code(Counter(4)) at (prev + 0, 30) to (start + 2, 6)
-- Code(Expression(122, Sub)) at (prev + 2, 15) to (start + 0, 28)
+- Code(Expression(120, Sub)) at (prev + 2, 15) to (start + 0, 28)
     = ((c31 + (((c32 + c33) + c34) + c35)) - c4)
-- Code(Expression(121, Sub)) at (prev + 1, 12) to (start + 0, 25)
+- Code(Expression(119, Sub)) at (prev + 1, 12) to (start + 0, 25)
     = (((c31 + (((c32 + c33) + c34) + c35)) - c4) - c9)
-- Code(Expression(120, Sub)) at (prev + 0, 29) to (start + 0, 42)
+- Code(Expression(118, Sub)) at (prev + 0, 29) to (start + 0, 42)
     = ((((c31 + (((c32 + c33) + c34) + c35)) - c4) - c9) - c5)
-- Code(Expression(119, Sub)) at (prev + 0, 46) to (start + 0, 60)
+- Code(Expression(117, Sub)) at (prev + 0, 46) to (start + 0, 60)
     = (((((c31 + (((c32 + c33) + c34) + c35)) - c4) - c9) - c5) - c6)
-- Code(Expression(135, Add)) at (prev + 0, 61) to (start + 2, 10)
+- Code(Expression(133, Add)) at (prev + 0, 61) to (start + 2, 10)
     = ((c5 + c6) + c7)
 - Code(Counter(8)) at (prev + 2, 10) to (start + 0, 11)
-- Code(Expression(134, Add)) at (prev + 1, 9) to (start + 0, 23)
+- Code(Expression(132, Add)) at (prev + 1, 9) to (start + 0, 23)
     = (((c5 + c6) + c7) + c8)
 - Code(Counter(9)) at (prev + 2, 9) to (start + 0, 15)
-- Code(Expression(132, Add)) at (prev + 2, 1) to (start + 0, 2)
+- Code(Expression(130, Add)) at (prev + 2, 1) to (start + 0, 2)
     = ((c4 + (((c5 + c6) + c7) + c8)) + (((c9 + c10) + (c11 + c12)) + (((c1 + Zero) - c2) - c3)))
 
diff --git a/tests/coverage-map/status-quo/continue.cov-map b/tests/coverage-map/status-quo/continue.cov-map
index c78cf293079..82f3d7c6095 100644
--- a/tests/coverage-map/status-quo/continue.cov-map
+++ b/tests/coverage-map/status-quo/continue.cov-map
@@ -1,8 +1,8 @@
 Function name: continue::main
-Raw bytes (216): 0x[01, 01, 1f, 01, 07, 05, 09, 03, 0d, 0d, 1f, 11, 15, 1b, 19, 0d, 1f, 11, 15, 15, 00, 19, 37, 1d, 21, 33, 25, 19, 37, 1d, 21, 1d, 00, 25, 4f, 29, 2d, 4b, 31, 25, 4f, 29, 2d, 31, 67, 35, 39, 5f, 3d, 31, 67, 35, 39, 35, 39, 3d, 41, 73, 45, 3d, 41, 41, 00, 49, 45, 1e, 01, 03, 01, 03, 12, 03, 04, 0e, 00, 13, 0a, 01, 0f, 00, 16, 05, 02, 11, 00, 19, 09, 02, 12, 04, 0e, 1b, 06, 0e, 00, 13, 16, 01, 0f, 00, 16, 15, 01, 16, 02, 0e, 11, 04, 11, 00, 19, 23, 03, 09, 00, 0e, 33, 02, 0e, 00, 13, 2e, 01, 0f, 00, 16, 1d, 01, 15, 02, 0e, 21, 04, 11, 00, 19, 3b, 03, 09, 00, 0e, 4b, 02, 0e, 00, 13, 46, 01, 0c, 00, 13, 29, 01, 0d, 00, 15, 2d, 01, 0a, 01, 0e, 5f, 03, 0e, 00, 13, 5a, 01, 0f, 00, 16, 39, 01, 16, 02, 0e, 35, 03, 12, 02, 0e, 67, 04, 09, 00, 0e, 73, 02, 0e, 00, 13, 6e, 01, 0f, 00, 16, 41, 01, 16, 02, 0e, 49, 04, 11, 00, 16, 77, 03, 09, 00, 0e, 7b, 02, 0d, 01, 02]
+Raw bytes (210): 0x[01, 01, 1c, 01, 07, 05, 09, 03, 0d, 0d, 1f, 11, 15, 1b, 19, 0d, 1f, 11, 15, 19, 33, 1d, 21, 2f, 25, 19, 33, 1d, 21, 25, 47, 29, 2d, 43, 31, 25, 47, 29, 2d, 31, 5f, 35, 39, 57, 3d, 31, 5f, 35, 39, 35, 39, 3d, 41, 6b, 45, 3d, 41, 49, 45, 1e, 01, 03, 01, 03, 12, 03, 04, 0e, 00, 13, 0a, 01, 0f, 00, 16, 05, 02, 11, 00, 19, 09, 02, 12, 04, 0e, 1b, 06, 0e, 00, 13, 16, 01, 0f, 00, 16, 15, 01, 16, 02, 0e, 11, 04, 11, 00, 19, 15, 03, 09, 00, 0e, 2f, 02, 0e, 00, 13, 2a, 01, 0f, 00, 16, 1d, 01, 15, 02, 0e, 21, 04, 11, 00, 19, 1d, 03, 09, 00, 0e, 43, 02, 0e, 00, 13, 3e, 01, 0c, 00, 13, 29, 01, 0d, 00, 15, 2d, 01, 0a, 01, 0e, 57, 03, 0e, 00, 13, 52, 01, 0f, 00, 16, 39, 01, 16, 02, 0e, 35, 03, 12, 02, 0e, 5f, 04, 09, 00, 0e, 6b, 02, 0e, 00, 13, 66, 01, 0f, 00, 16, 41, 01, 16, 02, 0e, 49, 04, 11, 00, 16, 41, 03, 09, 00, 0e, 6f, 02, 0d, 01, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 31
+Number of expressions: 28
 - expression 0 operands: lhs = Counter(0), rhs = Expression(1, Add)
 - expression 1 operands: lhs = Counter(1), rhs = Counter(2)
 - expression 2 operands: lhs = Expression(0, Add), rhs = Counter(3)
@@ -11,29 +11,26 @@ Number of expressions: 31
 - expression 5 operands: lhs = Expression(6, Add), rhs = Counter(6)
 - expression 6 operands: lhs = Counter(3), rhs = Expression(7, Add)
 - expression 7 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 8 operands: lhs = Counter(5), rhs = Zero
-- expression 9 operands: lhs = Counter(6), rhs = Expression(13, Add)
-- expression 10 operands: lhs = Counter(7), rhs = Counter(8)
-- expression 11 operands: lhs = Expression(12, Add), rhs = Counter(9)
-- expression 12 operands: lhs = Counter(6), rhs = Expression(13, Add)
-- expression 13 operands: lhs = Counter(7), rhs = Counter(8)
-- expression 14 operands: lhs = Counter(7), rhs = Zero
-- expression 15 operands: lhs = Counter(9), rhs = Expression(19, Add)
-- expression 16 operands: lhs = Counter(10), rhs = Counter(11)
-- expression 17 operands: lhs = Expression(18, Add), rhs = Counter(12)
-- expression 18 operands: lhs = Counter(9), rhs = Expression(19, Add)
-- expression 19 operands: lhs = Counter(10), rhs = Counter(11)
-- expression 20 operands: lhs = Counter(12), rhs = Expression(25, Add)
-- expression 21 operands: lhs = Counter(13), rhs = Counter(14)
-- expression 22 operands: lhs = Expression(23, Add), rhs = Counter(15)
-- expression 23 operands: lhs = Counter(12), rhs = Expression(25, Add)
-- expression 24 operands: lhs = Counter(13), rhs = Counter(14)
-- expression 25 operands: lhs = Counter(13), rhs = Counter(14)
+- expression 8 operands: lhs = Counter(6), rhs = Expression(12, Add)
+- expression 9 operands: lhs = Counter(7), rhs = Counter(8)
+- expression 10 operands: lhs = Expression(11, Add), rhs = Counter(9)
+- expression 11 operands: lhs = Counter(6), rhs = Expression(12, Add)
+- expression 12 operands: lhs = Counter(7), rhs = Counter(8)
+- expression 13 operands: lhs = Counter(9), rhs = Expression(17, Add)
+- expression 14 operands: lhs = Counter(10), rhs = Counter(11)
+- expression 15 operands: lhs = Expression(16, Add), rhs = Counter(12)
+- expression 16 operands: lhs = Counter(9), rhs = Expression(17, Add)
+- expression 17 operands: lhs = Counter(10), rhs = Counter(11)
+- expression 18 operands: lhs = Counter(12), rhs = Expression(23, Add)
+- expression 19 operands: lhs = Counter(13), rhs = Counter(14)
+- expression 20 operands: lhs = Expression(21, Add), rhs = Counter(15)
+- expression 21 operands: lhs = Counter(12), rhs = Expression(23, Add)
+- expression 22 operands: lhs = Counter(13), rhs = Counter(14)
+- expression 23 operands: lhs = Counter(13), rhs = Counter(14)
+- expression 24 operands: lhs = Counter(15), rhs = Counter(16)
+- expression 25 operands: lhs = Expression(26, Add), rhs = Counter(17)
 - expression 26 operands: lhs = Counter(15), rhs = Counter(16)
-- expression 27 operands: lhs = Expression(28, Add), rhs = Counter(17)
-- expression 28 operands: lhs = Counter(15), rhs = Counter(16)
-- expression 29 operands: lhs = Counter(16), rhs = Zero
-- expression 30 operands: lhs = Counter(18), rhs = Counter(17)
+- expression 27 operands: lhs = Counter(18), rhs = Counter(17)
 Number of file 0 mappings: 30
 - Code(Counter(0)) at (prev + 3, 1) to (start + 3, 18)
 - Code(Expression(0, Add)) at (prev + 4, 14) to (start + 0, 19)
@@ -48,38 +45,35 @@ Number of file 0 mappings: 30
     = ((c3 + (c4 + c5)) - c6)
 - Code(Counter(5)) at (prev + 1, 22) to (start + 2, 14)
 - Code(Counter(4)) at (prev + 4, 17) to (start + 0, 25)
-- Code(Expression(8, Add)) at (prev + 3, 9) to (start + 0, 14)
-    = (c5 + Zero)
-- Code(Expression(12, Add)) at (prev + 2, 14) to (start + 0, 19)
+- Code(Counter(5)) at (prev + 3, 9) to (start + 0, 14)
+- Code(Expression(11, Add)) at (prev + 2, 14) to (start + 0, 19)
     = (c6 + (c7 + c8))
-- Code(Expression(11, Sub)) at (prev + 1, 15) to (start + 0, 22)
+- Code(Expression(10, Sub)) at (prev + 1, 15) to (start + 0, 22)
     = ((c6 + (c7 + c8)) - c9)
 - Code(Counter(7)) at (prev + 1, 21) to (start + 2, 14)
 - Code(Counter(8)) at (prev + 4, 17) to (start + 0, 25)
-- Code(Expression(14, Add)) at (prev + 3, 9) to (start + 0, 14)
-    = (c7 + Zero)
-- Code(Expression(18, Add)) at (prev + 2, 14) to (start + 0, 19)
+- Code(Counter(7)) at (prev + 3, 9) to (start + 0, 14)
+- Code(Expression(16, Add)) at (prev + 2, 14) to (start + 0, 19)
     = (c9 + (c10 + c11))
-- Code(Expression(17, Sub)) at (prev + 1, 12) to (start + 0, 19)
+- Code(Expression(15, Sub)) at (prev + 1, 12) to (start + 0, 19)
     = ((c9 + (c10 + c11)) - c12)
 - Code(Counter(10)) at (prev + 1, 13) to (start + 0, 21)
 - Code(Counter(11)) at (prev + 1, 10) to (start + 1, 14)
-- Code(Expression(23, Add)) at (prev + 3, 14) to (start + 0, 19)
+- Code(Expression(21, Add)) at (prev + 3, 14) to (start + 0, 19)
     = (c12 + (c13 + c14))
-- Code(Expression(22, Sub)) at (prev + 1, 15) to (start + 0, 22)
+- Code(Expression(20, Sub)) at (prev + 1, 15) to (start + 0, 22)
     = ((c12 + (c13 + c14)) - c15)
 - Code(Counter(14)) at (prev + 1, 22) to (start + 2, 14)
 - Code(Counter(13)) at (prev + 3, 18) to (start + 2, 14)
-- Code(Expression(25, Add)) at (prev + 4, 9) to (start + 0, 14)
+- Code(Expression(23, Add)) at (prev + 4, 9) to (start + 0, 14)
     = (c13 + c14)
-- Code(Expression(28, Add)) at (prev + 2, 14) to (start + 0, 19)
+- Code(Expression(26, Add)) at (prev + 2, 14) to (start + 0, 19)
     = (c15 + c16)
-- Code(Expression(27, Sub)) at (prev + 1, 15) to (start + 0, 22)
+- Code(Expression(25, Sub)) at (prev + 1, 15) to (start + 0, 22)
     = ((c15 + c16) - c17)
 - Code(Counter(16)) at (prev + 1, 22) to (start + 2, 14)
 - Code(Counter(18)) at (prev + 4, 17) to (start + 0, 22)
-- Code(Expression(29, Add)) at (prev + 3, 9) to (start + 0, 14)
-    = (c16 + Zero)
-- Code(Expression(30, Add)) at (prev + 2, 13) to (start + 1, 2)
+- Code(Counter(16)) at (prev + 3, 9) to (start + 0, 14)
+- Code(Expression(27, Add)) at (prev + 2, 13) to (start + 1, 2)
     = (c18 + c17)
 
diff --git a/tests/coverage-map/status-quo/dead_code.cov-map b/tests/coverage-map/status-quo/dead_code.cov-map
index 8d5f88e63ef..0b8a40a8cde 100644
--- a/tests/coverage-map/status-quo/dead_code.cov-map
+++ b/tests/coverage-map/status-quo/dead_code.cov-map
@@ -14,23 +14,23 @@ Number of file 0 mappings: 4
     = (c1 + (c0 - c1))
 
 Function name: dead_code::unused_fn (unused)
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 0f, 01, 07, 0f, 00, 07, 10, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 00, 0f, 01, 07, 0f, 00, 07, 10, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 15, 1) to (start + 7, 15)
+- Code(Zero) at (prev + 15, 1) to (start + 7, 15)
 - Code(Zero) at (prev + 7, 16) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
 - Code(Zero) at (prev + 1, 1) to (start + 0, 2)
 
 Function name: dead_code::unused_pub_fn_not_in_library (unused)
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 03, 01, 07, 0f, 00, 07, 10, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 00, 03, 01, 07, 0f, 00, 07, 10, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 3, 1) to (start + 7, 15)
+- Code(Zero) at (prev + 3, 1) to (start + 7, 15)
 - Code(Zero) at (prev + 7, 16) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
 - Code(Zero) at (prev + 1, 1) to (start + 0, 2)
diff --git a/tests/coverage-map/status-quo/generator.cov-map b/tests/coverage-map/status-quo/generator.cov-map
index a66c1af30f9..75704bcc223 100644
--- a/tests/coverage-map/status-quo/generator.cov-map
+++ b/tests/coverage-map/status-quo/generator.cov-map
@@ -14,38 +14,33 @@ Number of file 0 mappings: 4
     = (c1 + (c0 - c1))
 
 Function name: generator::main
-Raw bytes (71): 0x[01, 01, 0b, 01, 00, 05, 0b, 09, 0d, 11, 00, 11, 15, 2a, 19, 11, 15, 15, 19, 26, 00, 2a, 19, 11, 15, 09, 01, 0f, 01, 02, 16, 03, 07, 0b, 00, 2e, 11, 01, 2b, 00, 2d, 07, 01, 0e, 00, 35, 0f, 02, 0b, 00, 2e, 2a, 01, 22, 00, 27, 26, 00, 2c, 00, 2e, 1f, 01, 0e, 00, 35, 23, 02, 01, 00, 02]
+Raw bytes (65): 0x[01, 01, 08, 05, 07, 09, 0d, 11, 15, 1e, 19, 11, 15, 15, 19, 1e, 19, 11, 15, 09, 01, 0f, 01, 02, 16, 01, 07, 0b, 00, 2e, 11, 01, 2b, 00, 2d, 03, 01, 0e, 00, 35, 11, 02, 0b, 00, 2e, 1e, 01, 22, 00, 27, 1a, 00, 2c, 00, 2e, 17, 01, 0e, 00, 35, 1a, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 11
-- expression 0 operands: lhs = Counter(0), rhs = Zero
-- expression 1 operands: lhs = Counter(1), rhs = Expression(2, Add)
-- expression 2 operands: lhs = Counter(2), rhs = Counter(3)
-- expression 3 operands: lhs = Counter(4), rhs = Zero
+Number of expressions: 8
+- expression 0 operands: lhs = Counter(1), rhs = Expression(1, Add)
+- expression 1 operands: lhs = Counter(2), rhs = Counter(3)
+- expression 2 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 3 operands: lhs = Expression(7, Sub), rhs = Counter(6)
 - expression 4 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 5 operands: lhs = Expression(10, Sub), rhs = Counter(6)
-- expression 6 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 7 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 8 operands: lhs = Expression(9, Sub), rhs = Zero
-- expression 9 operands: lhs = Expression(10, Sub), rhs = Counter(6)
-- expression 10 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 5 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 6 operands: lhs = Expression(7, Sub), rhs = Counter(6)
+- expression 7 operands: lhs = Counter(4), rhs = Counter(5)
 Number of file 0 mappings: 9
 - Code(Counter(0)) at (prev + 15, 1) to (start + 2, 22)
-- Code(Expression(0, Add)) at (prev + 7, 11) to (start + 0, 46)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 7, 11) to (start + 0, 46)
 - Code(Counter(4)) at (prev + 1, 43) to (start + 0, 45)
-- Code(Expression(1, Add)) at (prev + 1, 14) to (start + 0, 53)
+- Code(Expression(0, Add)) at (prev + 1, 14) to (start + 0, 53)
     = (c1 + (c2 + c3))
-- Code(Expression(3, Add)) at (prev + 2, 11) to (start + 0, 46)
-    = (c4 + Zero)
-- Code(Expression(10, Sub)) at (prev + 1, 34) to (start + 0, 39)
+- Code(Counter(4)) at (prev + 2, 11) to (start + 0, 46)
+- Code(Expression(7, Sub)) at (prev + 1, 34) to (start + 0, 39)
     = (c4 - c5)
-- Code(Expression(9, Sub)) at (prev + 0, 44) to (start + 0, 46)
+- Code(Expression(6, Sub)) at (prev + 0, 44) to (start + 0, 46)
     = ((c4 - c5) - c6)
-- Code(Expression(7, Add)) at (prev + 1, 14) to (start + 0, 53)
+- Code(Expression(5, Add)) at (prev + 1, 14) to (start + 0, 53)
     = (c5 + c6)
-- Code(Expression(8, Add)) at (prev + 2, 1) to (start + 0, 2)
-    = (((c4 - c5) - c6) + Zero)
+- Code(Expression(6, Sub)) at (prev + 2, 1) to (start + 0, 2)
+    = ((c4 - c5) - c6)
 
 Function name: generator::main::{closure#0}
 Raw bytes (14): 0x[01, 01, 00, 02, 01, 11, 1c, 01, 1f, 05, 02, 10, 01, 06]
diff --git a/tests/coverage-map/status-quo/inline-dead.cov-map b/tests/coverage-map/status-quo/inline-dead.cov-map
index dec43d3e8bb..483f7ef79c6 100644
--- a/tests/coverage-map/status-quo/inline-dead.cov-map
+++ b/tests/coverage-map/status-quo/inline-dead.cov-map
@@ -1,10 +1,10 @@
 Function name: inline_dead::dead (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 19, 01, 02, 02]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 19, 01, 02, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 25, 1) to (start + 2, 2)
+- Code(Zero) at (prev + 25, 1) to (start + 2, 2)
 
 Function name: inline_dead::live::<false>
 Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 10, 01, 01, 09, 00, 02, 09, 00, 0f, 02, 02, 09, 00, 0a, 07, 02, 01, 00, 02]
@@ -22,15 +22,13 @@ Number of file 0 mappings: 4
     = (c1 + (c0 - c1))
 
 Function name: inline_dead::main
-Raw bytes (16): 0x[01, 01, 01, 01, 00, 02, 01, 04, 01, 03, 0d, 03, 07, 06, 02, 02]
+Raw bytes (14): 0x[01, 01, 00, 02, 01, 04, 01, 03, 0d, 01, 07, 06, 02, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 1
-- expression 0 operands: lhs = Counter(0), rhs = Zero
+Number of expressions: 0
 Number of file 0 mappings: 2
 - Code(Counter(0)) at (prev + 4, 1) to (start + 3, 13)
-- Code(Expression(0, Add)) at (prev + 7, 6) to (start + 2, 2)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 7, 6) to (start + 2, 2)
 
 Function name: inline_dead::main::{closure#0}
 Raw bytes (16): 0x[01, 01, 01, 01, 05, 02, 00, 09, 0d, 00, 0e, 03, 02, 05, 00, 06]
diff --git a/tests/coverage-map/status-quo/inline.cov-map b/tests/coverage-map/status-quo/inline.cov-map
index 57ae85623fb..72b10fd0cc2 100644
--- a/tests/coverage-map/status-quo/inline.cov-map
+++ b/tests/coverage-map/status-quo/inline.cov-map
@@ -1,19 +1,17 @@
 Function name: inline::display::<char>
-Raw bytes (35): 0x[01, 01, 03, 01, 05, 05, 00, 03, 05, 05, 01, 29, 01, 00, 22, 05, 01, 09, 00, 0a, 03, 00, 0e, 00, 10, 07, 00, 11, 02, 06, 0a, 03, 05, 01, 02]
+Raw bytes (33): 0x[01, 01, 02, 01, 05, 03, 05, 05, 01, 29, 01, 00, 22, 05, 01, 09, 00, 0a, 03, 00, 0e, 00, 10, 05, 00, 11, 02, 06, 06, 03, 05, 01, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 3
+Number of expressions: 2
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Counter(1), rhs = Zero
-- expression 2 operands: lhs = Expression(0, Add), rhs = Counter(1)
+- expression 1 operands: lhs = Expression(0, Add), rhs = Counter(1)
 Number of file 0 mappings: 5
 - Code(Counter(0)) at (prev + 41, 1) to (start + 0, 34)
 - Code(Counter(1)) at (prev + 1, 9) to (start + 0, 10)
 - Code(Expression(0, Add)) at (prev + 0, 14) to (start + 0, 16)
     = (c0 + c1)
-- Code(Expression(1, Add)) at (prev + 0, 17) to (start + 2, 6)
-    = (c1 + Zero)
-- Code(Expression(2, Sub)) at (prev + 3, 5) to (start + 1, 2)
+- Code(Counter(1)) at (prev + 0, 17) to (start + 2, 6)
+- Code(Expression(1, Sub)) at (prev + 3, 5) to (start + 1, 2)
     = ((c0 + c1) - c1)
 
 Function name: inline::error
@@ -41,15 +39,14 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 5, 1) to (start + 2, 2)
 
 Function name: inline::permutate::<char>
-Raw bytes (54): 0x[01, 01, 05, 01, 05, 02, 0d, 11, 00, 05, 13, 09, 0d, 08, 01, 0f, 01, 02, 0e, 05, 02, 0f, 02, 06, 02, 02, 0f, 00, 14, 11, 01, 0d, 00, 0e, 06, 00, 12, 00, 16, 0b, 00, 17, 04, 0a, 0d, 05, 0c, 02, 06, 0f, 03, 01, 00, 02]
+Raw bytes (52): 0x[01, 01, 04, 01, 05, 02, 0d, 05, 0f, 09, 0d, 08, 01, 0f, 01, 02, 0e, 05, 02, 0f, 02, 06, 02, 02, 0f, 00, 14, 11, 01, 0d, 00, 0e, 06, 00, 12, 00, 16, 11, 00, 17, 04, 0a, 0d, 05, 0c, 02, 06, 0b, 03, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 5
+Number of expressions: 4
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 1 operands: lhs = Expression(0, Sub), rhs = Counter(3)
-- expression 2 operands: lhs = Counter(4), rhs = Zero
-- expression 3 operands: lhs = Counter(1), rhs = Expression(4, Add)
-- expression 4 operands: lhs = Counter(2), rhs = Counter(3)
+- expression 2 operands: lhs = Counter(1), rhs = Expression(3, Add)
+- expression 3 operands: lhs = Counter(2), rhs = Counter(3)
 Number of file 0 mappings: 8
 - Code(Counter(0)) at (prev + 15, 1) to (start + 2, 14)
 - Code(Counter(1)) at (prev + 2, 15) to (start + 2, 6)
@@ -58,10 +55,9 @@ Number of file 0 mappings: 8
 - Code(Counter(4)) at (prev + 1, 13) to (start + 0, 14)
 - Code(Expression(1, Sub)) at (prev + 0, 18) to (start + 0, 22)
     = ((c0 - c1) - c3)
-- Code(Expression(2, Add)) at (prev + 0, 23) to (start + 4, 10)
-    = (c4 + Zero)
+- Code(Counter(4)) at (prev + 0, 23) to (start + 4, 10)
 - Code(Counter(3)) at (prev + 5, 12) to (start + 2, 6)
-- Code(Expression(3, Add)) at (prev + 3, 1) to (start + 0, 2)
+- Code(Expression(2, Add)) at (prev + 3, 1) to (start + 0, 2)
     = (c1 + (c2 + c3))
 
 Function name: inline::permutations::<char>
diff --git a/tests/coverage-map/status-quo/issue-93054.cov-map b/tests/coverage-map/status-quo/issue-93054.cov-map
index 52fe7f58d15..c2c6e9a6516 100644
--- a/tests/coverage-map/status-quo/issue-93054.cov-map
+++ b/tests/coverage-map/status-quo/issue-93054.cov-map
@@ -1,10 +1,10 @@
 Function name: issue_93054::foo2 (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 16, 01, 00, 1d]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 16, 01, 00, 1d]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 22, 1) to (start + 0, 29)
+- Code(Zero) at (prev + 22, 1) to (start + 0, 29)
 
 Function name: issue_93054::main
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 1e, 01, 00, 0d]
@@ -15,10 +15,10 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 30, 1) to (start + 0, 13)
 
 Function name: issue_93054::make (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 1a, 01, 02, 02]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 1a, 01, 02, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 26, 1) to (start + 2, 2)
+- Code(Zero) at (prev + 26, 1) to (start + 2, 2)
 
diff --git a/tests/coverage-map/status-quo/lazy_boolean.cov-map b/tests/coverage-map/status-quo/lazy_boolean.cov-map
index b18a9640433..0ad393c40fa 100644
--- a/tests/coverage-map/status-quo/lazy_boolean.cov-map
+++ b/tests/coverage-map/status-quo/lazy_boolean.cov-map
@@ -1,223 +1,219 @@
 Function name: lazy_boolean::main
-Raw bytes (646): 0x[01, 01, a8, 01, 01, 05, 09, 9a, 05, 9f, 05, 09, 05, 02, 05, 02, 9f, 05, 09, 05, 02, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 97, 05, 00, 09, 9a, 05, 9f, 05, 09, 05, 02, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 8f, 05, 00, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 87, 05, 00, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, ff, 04, 00, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 19, fa, 04, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, f7, 04, 1d, 19, fa, 04, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 1d, f2, 04, f7, 04, 1d, 19, fa, 04, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, ef, 04, 21, 1d, f2, 04, f7, 04, 1d, 19, fa, 04, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 21, ea, 04, ef, 04, 21, 1d, f2, 04, f7, 04, 1d, 19, fa, 04, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, e7, 04, 25, 21, ea, 04, ef, 04, 21, 1d, f2, 04, f7, 04, 1d, 19, fa, 04, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 25, e2, 04, e7, 04, 25, 21, ea, 04, ef, 04, 21, 1d, f2, 04, f7, 04, 1d, 19, fa, 04, ff, 04, 19, 15, 82, 05, 87, 05, 15, 11, 8a, 05, 8f, 05, 11, 0d, 92, 05, 97, 05, 0d, 09, 9a, 05, 9f, 05, 09, 05, 02, 1c, 01, 03, 01, 07, 0f, 05, 07, 10, 04, 06, 02, 04, 06, 00, 07, 97, 05, 02, 09, 00, 11, 9f, 05, 02, 0d, 00, 12, 9a, 05, 02, 0d, 00, 12, 8f, 05, 03, 09, 00, 11, 33, 02, 0d, 00, 12, 92, 05, 02, 0d, 00, 12, 87, 05, 02, 09, 00, 11, 6f, 00, 14, 00, 19, 11, 00, 1d, 00, 22, ff, 04, 01, 09, 00, 11, ab, 01, 00, 14, 00, 19, 15, 00, 1d, 00, 22, cb, 01, 04, 09, 00, 10, fa, 04, 01, 05, 03, 06, 19, 03, 06, 00, 07, f7, 04, 03, 09, 00, 10, 1d, 01, 05, 03, 06, f2, 04, 05, 05, 03, 06, ef, 04, 05, 09, 00, 10, ea, 04, 00, 11, 02, 06, 21, 02, 06, 00, 07, e7, 04, 02, 08, 00, 0f, 25, 00, 10, 02, 06, e2, 04, 02, 0c, 02, 06, df, 04, 03, 01, 00, 02]
+Raw bytes (636): 0x[01, 01, a4, 01, 01, 05, 09, 8a, 05, 8f, 05, 09, 05, 02, 05, 02, 8f, 05, 09, 05, 02, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 09, 8a, 05, 8f, 05, 09, 05, 02, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 19, ea, 04, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, e7, 04, 1d, 19, ea, 04, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 1d, e2, 04, e7, 04, 1d, 19, ea, 04, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, df, 04, 21, 1d, e2, 04, e7, 04, 1d, 19, ea, 04, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 21, da, 04, df, 04, 21, 1d, e2, 04, e7, 04, 1d, 19, ea, 04, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, d7, 04, 25, 21, da, 04, df, 04, 21, 1d, e2, 04, e7, 04, 1d, 19, ea, 04, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 25, d2, 04, d7, 04, 25, 21, da, 04, df, 04, 21, 1d, e2, 04, e7, 04, 1d, 19, ea, 04, ef, 04, 19, 15, f2, 04, f7, 04, 15, 11, fa, 04, ff, 04, 11, 0d, 82, 05, 87, 05, 0d, 09, 8a, 05, 8f, 05, 09, 05, 02, 1c, 01, 03, 01, 07, 0f, 05, 07, 10, 04, 06, 02, 04, 06, 00, 07, 87, 05, 02, 09, 00, 11, 8f, 05, 02, 0d, 00, 12, 8a, 05, 02, 0d, 00, 12, ff, 04, 03, 09, 00, 11, 87, 05, 02, 0d, 00, 12, 82, 05, 02, 0d, 00, 12, f7, 04, 02, 09, 00, 11, ff, 04, 00, 14, 00, 19, 11, 00, 1d, 00, 22, ef, 04, 01, 09, 00, 11, f7, 04, 00, 14, 00, 19, 15, 00, 1d, 00, 22, ef, 04, 04, 09, 00, 10, ea, 04, 01, 05, 03, 06, 19, 03, 06, 00, 07, e7, 04, 03, 09, 00, 10, 1d, 01, 05, 03, 06, e2, 04, 05, 05, 03, 06, df, 04, 05, 09, 00, 10, da, 04, 00, 11, 02, 06, 21, 02, 06, 00, 07, d7, 04, 02, 08, 00, 0f, 25, 00, 10, 02, 06, d2, 04, 02, 0c, 02, 06, cf, 04, 03, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 168
+Number of expressions: 164
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 2 operands: lhs = Expression(167, Add), rhs = Counter(2)
+- expression 1 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 2 operands: lhs = Expression(163, Add), rhs = Counter(2)
 - expression 3 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 - expression 4 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 5 operands: lhs = Expression(167, Add), rhs = Counter(2)
+- expression 5 operands: lhs = Expression(163, Add), rhs = Counter(2)
 - expression 6 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 7 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 8 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 9 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 10 operands: lhs = Expression(167, Add), rhs = Counter(2)
+- expression 7 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 8 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 9 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 10 operands: lhs = Expression(163, Add), rhs = Counter(2)
 - expression 11 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 12 operands: lhs = Expression(165, Add), rhs = Zero
-- expression 13 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 14 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 15 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 16 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 17 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 18 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 19 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 20 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 21 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 22 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 23 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 24 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 25 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 26 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 27 operands: lhs = Expression(163, Add), rhs = Zero
-- expression 28 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 29 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 30 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 31 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 32 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 33 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 34 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 35 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 36 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 37 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 38 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 39 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 40 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 41 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 42 operands: lhs = Expression(161, Add), rhs = Zero
-- expression 43 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 44 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 45 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 46 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 47 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 48 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 49 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 50 operands: lhs = Expression(159, Add), rhs = Zero
-- expression 51 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 52 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 53 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 54 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 55 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 56 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 57 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 58 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 59 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 60 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 61 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 62 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 63 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 64 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 65 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 66 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 67 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 68 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 69 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 70 operands: lhs = Counter(6), rhs = Expression(158, Sub)
-- expression 71 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 72 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 73 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 74 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 75 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 76 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 77 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 78 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 79 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 80 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 81 operands: lhs = Expression(157, Add), rhs = Counter(7)
-- expression 82 operands: lhs = Counter(6), rhs = Expression(158, Sub)
-- expression 83 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 84 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 85 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 86 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 87 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 88 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 89 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 90 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 91 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 92 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 93 operands: lhs = Counter(7), rhs = Expression(156, Sub)
-- expression 94 operands: lhs = Expression(157, Add), rhs = Counter(7)
-- expression 95 operands: lhs = Counter(6), rhs = Expression(158, Sub)
-- expression 96 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 97 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 98 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 99 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 100 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 101 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 102 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 103 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 104 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 105 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 106 operands: lhs = Expression(155, Add), rhs = Counter(8)
-- expression 107 operands: lhs = Counter(7), rhs = Expression(156, Sub)
-- expression 108 operands: lhs = Expression(157, Add), rhs = Counter(7)
-- expression 109 operands: lhs = Counter(6), rhs = Expression(158, Sub)
-- expression 110 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 111 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 112 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 113 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 114 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 115 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 116 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 117 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 118 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 119 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 120 operands: lhs = Counter(8), rhs = Expression(154, Sub)
-- expression 121 operands: lhs = Expression(155, Add), rhs = Counter(8)
-- expression 122 operands: lhs = Counter(7), rhs = Expression(156, Sub)
-- expression 123 operands: lhs = Expression(157, Add), rhs = Counter(7)
-- expression 124 operands: lhs = Counter(6), rhs = Expression(158, Sub)
-- expression 125 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 126 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 127 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 128 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 129 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 130 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 131 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 132 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 133 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 134 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 135 operands: lhs = Expression(153, Add), rhs = Counter(9)
-- expression 136 operands: lhs = Counter(8), rhs = Expression(154, Sub)
-- expression 137 operands: lhs = Expression(155, Add), rhs = Counter(8)
-- expression 138 operands: lhs = Counter(7), rhs = Expression(156, Sub)
-- expression 139 operands: lhs = Expression(157, Add), rhs = Counter(7)
-- expression 140 operands: lhs = Counter(6), rhs = Expression(158, Sub)
-- expression 141 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 142 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 143 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 144 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 145 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 146 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 147 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 148 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 149 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 150 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 151 operands: lhs = Counter(9), rhs = Expression(152, Sub)
-- expression 152 operands: lhs = Expression(153, Add), rhs = Counter(9)
-- expression 153 operands: lhs = Counter(8), rhs = Expression(154, Sub)
-- expression 154 operands: lhs = Expression(155, Add), rhs = Counter(8)
-- expression 155 operands: lhs = Counter(7), rhs = Expression(156, Sub)
-- expression 156 operands: lhs = Expression(157, Add), rhs = Counter(7)
-- expression 157 operands: lhs = Counter(6), rhs = Expression(158, Sub)
-- expression 158 operands: lhs = Expression(159, Add), rhs = Counter(6)
-- expression 159 operands: lhs = Counter(5), rhs = Expression(160, Sub)
-- expression 160 operands: lhs = Expression(161, Add), rhs = Counter(5)
-- expression 161 operands: lhs = Counter(4), rhs = Expression(162, Sub)
-- expression 162 operands: lhs = Expression(163, Add), rhs = Counter(4)
-- expression 163 operands: lhs = Counter(3), rhs = Expression(164, Sub)
-- expression 164 operands: lhs = Expression(165, Add), rhs = Counter(3)
-- expression 165 operands: lhs = Counter(2), rhs = Expression(166, Sub)
-- expression 166 operands: lhs = Expression(167, Add), rhs = Counter(2)
-- expression 167 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 12 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 13 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 14 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 15 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 16 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 17 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 18 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 19 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 20 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 21 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 22 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 23 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 24 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 25 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 26 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 27 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 28 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 29 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 30 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 31 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 32 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 33 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 34 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 35 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 36 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 37 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 38 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 39 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 40 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 41 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 42 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 43 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 44 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 45 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 46 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 47 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 48 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 49 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 50 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 51 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 52 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 53 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 54 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 55 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 56 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 57 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 58 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 59 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 60 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 61 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 62 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 63 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 64 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 65 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 66 operands: lhs = Counter(6), rhs = Expression(154, Sub)
+- expression 67 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 68 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 69 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 70 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 71 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 72 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 73 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 74 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 75 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 76 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 77 operands: lhs = Expression(153, Add), rhs = Counter(7)
+- expression 78 operands: lhs = Counter(6), rhs = Expression(154, Sub)
+- expression 79 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 80 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 81 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 82 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 83 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 84 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 85 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 86 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 87 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 88 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 89 operands: lhs = Counter(7), rhs = Expression(152, Sub)
+- expression 90 operands: lhs = Expression(153, Add), rhs = Counter(7)
+- expression 91 operands: lhs = Counter(6), rhs = Expression(154, Sub)
+- expression 92 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 93 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 94 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 95 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 96 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 97 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 98 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 99 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 100 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 101 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 102 operands: lhs = Expression(151, Add), rhs = Counter(8)
+- expression 103 operands: lhs = Counter(7), rhs = Expression(152, Sub)
+- expression 104 operands: lhs = Expression(153, Add), rhs = Counter(7)
+- expression 105 operands: lhs = Counter(6), rhs = Expression(154, Sub)
+- expression 106 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 107 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 108 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 109 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 110 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 111 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 112 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 113 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 114 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 115 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 116 operands: lhs = Counter(8), rhs = Expression(150, Sub)
+- expression 117 operands: lhs = Expression(151, Add), rhs = Counter(8)
+- expression 118 operands: lhs = Counter(7), rhs = Expression(152, Sub)
+- expression 119 operands: lhs = Expression(153, Add), rhs = Counter(7)
+- expression 120 operands: lhs = Counter(6), rhs = Expression(154, Sub)
+- expression 121 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 122 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 123 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 124 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 125 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 126 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 127 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 128 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 129 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 130 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 131 operands: lhs = Expression(149, Add), rhs = Counter(9)
+- expression 132 operands: lhs = Counter(8), rhs = Expression(150, Sub)
+- expression 133 operands: lhs = Expression(151, Add), rhs = Counter(8)
+- expression 134 operands: lhs = Counter(7), rhs = Expression(152, Sub)
+- expression 135 operands: lhs = Expression(153, Add), rhs = Counter(7)
+- expression 136 operands: lhs = Counter(6), rhs = Expression(154, Sub)
+- expression 137 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 138 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 139 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 140 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 141 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 142 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 143 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 144 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 145 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 146 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 147 operands: lhs = Counter(9), rhs = Expression(148, Sub)
+- expression 148 operands: lhs = Expression(149, Add), rhs = Counter(9)
+- expression 149 operands: lhs = Counter(8), rhs = Expression(150, Sub)
+- expression 150 operands: lhs = Expression(151, Add), rhs = Counter(8)
+- expression 151 operands: lhs = Counter(7), rhs = Expression(152, Sub)
+- expression 152 operands: lhs = Expression(153, Add), rhs = Counter(7)
+- expression 153 operands: lhs = Counter(6), rhs = Expression(154, Sub)
+- expression 154 operands: lhs = Expression(155, Add), rhs = Counter(6)
+- expression 155 operands: lhs = Counter(5), rhs = Expression(156, Sub)
+- expression 156 operands: lhs = Expression(157, Add), rhs = Counter(5)
+- expression 157 operands: lhs = Counter(4), rhs = Expression(158, Sub)
+- expression 158 operands: lhs = Expression(159, Add), rhs = Counter(4)
+- expression 159 operands: lhs = Counter(3), rhs = Expression(160, Sub)
+- expression 160 operands: lhs = Expression(161, Add), rhs = Counter(3)
+- expression 161 operands: lhs = Counter(2), rhs = Expression(162, Sub)
+- expression 162 operands: lhs = Expression(163, Add), rhs = Counter(2)
+- expression 163 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 28
 - Code(Counter(0)) at (prev + 3, 1) to (start + 7, 15)
 - Code(Counter(1)) at (prev + 7, 16) to (start + 4, 6)
 - Code(Expression(0, Sub)) at (prev + 4, 6) to (start + 0, 7)
     = (c0 - c1)
-- Code(Expression(165, Add)) at (prev + 2, 9) to (start + 0, 17)
+- Code(Expression(161, Add)) at (prev + 2, 9) to (start + 0, 17)
     = (c2 + ((c1 + (c0 - c1)) - c2))
-- Code(Expression(167, Add)) at (prev + 2, 13) to (start + 0, 18)
+- Code(Expression(163, Add)) at (prev + 2, 13) to (start + 0, 18)
     = (c1 + (c0 - c1))
-- Code(Expression(166, Sub)) at (prev + 2, 13) to (start + 0, 18)
+- Code(Expression(162, Sub)) at (prev + 2, 13) to (start + 0, 18)
     = ((c1 + (c0 - c1)) - c2)
-- Code(Expression(163, Add)) at (prev + 3, 9) to (start + 0, 17)
+- Code(Expression(159, Add)) at (prev + 3, 9) to (start + 0, 17)
     = (c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3))
-- Code(Expression(12, Add)) at (prev + 2, 13) to (start + 0, 18)
-    = ((c2 + ((c1 + (c0 - c1)) - c2)) + Zero)
-- Code(Expression(164, Sub)) at (prev + 2, 13) to (start + 0, 18)
+- Code(Expression(161, Add)) at (prev + 2, 13) to (start + 0, 18)
+    = (c2 + ((c1 + (c0 - c1)) - c2))
+- Code(Expression(160, Sub)) at (prev + 2, 13) to (start + 0, 18)
     = ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)
-- Code(Expression(161, Add)) at (prev + 2, 9) to (start + 0, 17)
+- Code(Expression(157, Add)) at (prev + 2, 9) to (start + 0, 17)
     = (c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4))
-- Code(Expression(27, Add)) at (prev + 0, 20) to (start + 0, 25)
-    = ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) + Zero)
+- Code(Expression(159, Add)) at (prev + 0, 20) to (start + 0, 25)
+    = (c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3))
 - Code(Counter(4)) at (prev + 0, 29) to (start + 0, 34)
-- Code(Expression(159, Add)) at (prev + 1, 9) to (start + 0, 17)
+- Code(Expression(155, Add)) at (prev + 1, 9) to (start + 0, 17)
     = (c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5))
-- Code(Expression(42, Add)) at (prev + 0, 20) to (start + 0, 25)
-    = ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) + Zero)
+- Code(Expression(157, Add)) at (prev + 0, 20) to (start + 0, 25)
+    = (c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4))
 - Code(Counter(5)) at (prev + 0, 29) to (start + 0, 34)
-- Code(Expression(50, Add)) at (prev + 4, 9) to (start + 0, 16)
-    = ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) + Zero)
-- Code(Expression(158, Sub)) at (prev + 1, 5) to (start + 3, 6)
+- Code(Expression(155, Add)) at (prev + 4, 9) to (start + 0, 16)
+    = (c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5))
+- Code(Expression(154, Sub)) at (prev + 1, 5) to (start + 3, 6)
     = ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6)
 - Code(Counter(6)) at (prev + 3, 6) to (start + 0, 7)
-- Code(Expression(157, Add)) at (prev + 3, 9) to (start + 0, 16)
+- Code(Expression(153, Add)) at (prev + 3, 9) to (start + 0, 16)
     = (c6 + ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6))
 - Code(Counter(7)) at (prev + 1, 5) to (start + 3, 6)
-- Code(Expression(156, Sub)) at (prev + 5, 5) to (start + 3, 6)
+- Code(Expression(152, Sub)) at (prev + 5, 5) to (start + 3, 6)
     = ((c6 + ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6)) - c7)
-- Code(Expression(155, Add)) at (prev + 5, 9) to (start + 0, 16)
+- Code(Expression(151, Add)) at (prev + 5, 9) to (start + 0, 16)
     = (c7 + ((c6 + ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6)) - c7))
-- Code(Expression(154, Sub)) at (prev + 0, 17) to (start + 2, 6)
+- Code(Expression(150, Sub)) at (prev + 0, 17) to (start + 2, 6)
     = ((c7 + ((c6 + ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6)) - c7)) - c8)
 - Code(Counter(8)) at (prev + 2, 6) to (start + 0, 7)
-- Code(Expression(153, Add)) at (prev + 2, 8) to (start + 0, 15)
+- Code(Expression(149, Add)) at (prev + 2, 8) to (start + 0, 15)
     = (c8 + ((c7 + ((c6 + ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6)) - c7)) - c8))
 - Code(Counter(9)) at (prev + 0, 16) to (start + 2, 6)
-- Code(Expression(152, Sub)) at (prev + 2, 12) to (start + 2, 6)
+- Code(Expression(148, Sub)) at (prev + 2, 12) to (start + 2, 6)
     = ((c8 + ((c7 + ((c6 + ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6)) - c7)) - c8)) - c9)
-- Code(Expression(151, Add)) at (prev + 3, 1) to (start + 0, 2)
+- Code(Expression(147, Add)) at (prev + 3, 1) to (start + 0, 2)
     = (c9 + ((c8 + ((c7 + ((c6 + ((c5 + ((c4 + ((c3 + ((c2 + ((c1 + (c0 - c1)) - c2)) - c3)) - c4)) - c5)) - c6)) - c7)) - c8)) - c9))
 
diff --git a/tests/coverage-map/status-quo/loops_branches.cov-map b/tests/coverage-map/status-quo/loops_branches.cov-map
index 480bbfd9795..ebace8cbd71 100644
--- a/tests/coverage-map/status-quo/loops_branches.cov-map
+++ b/tests/coverage-map/status-quo/loops_branches.cov-map
@@ -1,58 +1,57 @@
 Function name: <loops_branches::DebugTest as core::fmt::Debug>::fmt
-Raw bytes (251): 0x[01, 01, 32, 05, 09, 00, 02, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, c3, 01, c7, 01, 0d, 00, 11, 15, ba, 01, 00, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, 00, b2, 01, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, af, 01, 11, 00, b2, 01, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, 25, a7, 01, aa, 01, 19, af, 01, 11, 00, b2, 01, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, 14, 01, 09, 05, 01, 10, 05, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 02, 01, 0e, 00, 0f, 07, 01, 0d, 00, 1e, 25, 00, 1e, 00, 1f, 00, 01, 10, 01, 0a, ba, 01, 03, 0d, 00, 0e, bf, 01, 00, 12, 00, 17, 27, 01, 10, 00, 14, b6, 01, 01, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, b2, 01, 01, 12, 00, 13, af, 01, 01, 11, 00, 22, aa, 01, 00, 22, 00, 23, 00, 01, 14, 01, 0e, 19, 03, 09, 00, 0f, a3, 01, 01, 05, 00, 06]
+Raw bytes (249): 0x[01, 01, 31, 05, 09, 00, 02, bb, 01, 19, bf, 01, c3, 01, 0d, 00, 11, 15, bf, 01, c3, 01, 0d, 00, 11, 15, bb, 01, 19, bf, 01, c3, 01, 0d, 00, 11, 15, b6, 01, 15, bb, 01, 19, bf, 01, c3, 01, 0d, 00, 11, 15, b2, 01, 1d, b6, 01, 15, bb, 01, 19, bf, 01, c3, 01, 0d, 00, 11, 15, 00, ae, 01, b2, 01, 1d, b6, 01, 15, bb, 01, 19, bf, 01, c3, 01, 0d, 00, 11, 15, ab, 01, 11, 00, ae, 01, b2, 01, 1d, b6, 01, 15, bb, 01, 19, bf, 01, c3, 01, 0d, 00, 11, 15, 25, a3, 01, a6, 01, 19, ab, 01, 11, 00, ae, 01, b2, 01, 1d, b6, 01, 15, bb, 01, 19, bf, 01, c3, 01, 0d, 00, 11, 15, 14, 01, 09, 05, 01, 10, 05, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 02, 01, 0e, 00, 0f, 07, 01, 0d, 00, 1e, 25, 00, 1e, 00, 1f, 00, 01, 10, 01, 0a, b6, 01, 03, 0d, 00, 0e, bb, 01, 00, 12, 00, 17, b6, 01, 01, 10, 00, 14, b2, 01, 01, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, ae, 01, 01, 12, 00, 13, ab, 01, 01, 11, 00, 22, a6, 01, 00, 22, 00, 23, 00, 01, 14, 01, 0e, 19, 03, 09, 00, 0f, 9f, 01, 01, 05, 00, 06]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 50
+Number of expressions: 49
 - expression 0 operands: lhs = Counter(1), rhs = Counter(2)
 - expression 1 operands: lhs = Zero, rhs = Expression(0, Sub)
-- expression 2 operands: lhs = Expression(47, Add), rhs = Counter(6)
-- expression 3 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 2 operands: lhs = Expression(46, Add), rhs = Counter(6)
+- expression 3 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
 - expression 4 operands: lhs = Counter(3), rhs = Zero
 - expression 5 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 6 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 6 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
 - expression 7 operands: lhs = Counter(3), rhs = Zero
 - expression 8 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 9 operands: lhs = Expression(46, Sub), rhs = Zero
-- expression 10 operands: lhs = Expression(47, Add), rhs = Counter(6)
-- expression 11 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
-- expression 12 operands: lhs = Counter(3), rhs = Zero
-- expression 13 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 14 operands: lhs = Expression(46, Sub), rhs = Counter(5)
-- expression 15 operands: lhs = Expression(47, Add), rhs = Counter(6)
-- expression 16 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
-- expression 17 operands: lhs = Counter(3), rhs = Zero
-- expression 18 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 19 operands: lhs = Expression(45, Sub), rhs = Counter(7)
-- expression 20 operands: lhs = Expression(46, Sub), rhs = Counter(5)
-- expression 21 operands: lhs = Expression(47, Add), rhs = Counter(6)
-- expression 22 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
-- expression 23 operands: lhs = Counter(3), rhs = Zero
-- expression 24 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 25 operands: lhs = Zero, rhs = Expression(44, Sub)
-- expression 26 operands: lhs = Expression(45, Sub), rhs = Counter(7)
-- expression 27 operands: lhs = Expression(46, Sub), rhs = Counter(5)
-- expression 28 operands: lhs = Expression(47, Add), rhs = Counter(6)
-- expression 29 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
-- expression 30 operands: lhs = Counter(3), rhs = Zero
-- expression 31 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 32 operands: lhs = Expression(43, Add), rhs = Counter(4)
-- expression 33 operands: lhs = Zero, rhs = Expression(44, Sub)
-- expression 34 operands: lhs = Expression(45, Sub), rhs = Counter(7)
-- expression 35 operands: lhs = Expression(46, Sub), rhs = Counter(5)
-- expression 36 operands: lhs = Expression(47, Add), rhs = Counter(6)
-- expression 37 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
-- expression 38 operands: lhs = Counter(3), rhs = Zero
-- expression 39 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 40 operands: lhs = Counter(9), rhs = Expression(41, Add)
-- expression 41 operands: lhs = Expression(42, Sub), rhs = Counter(6)
-- expression 42 operands: lhs = Expression(43, Add), rhs = Counter(4)
-- expression 43 operands: lhs = Zero, rhs = Expression(44, Sub)
-- expression 44 operands: lhs = Expression(45, Sub), rhs = Counter(7)
-- expression 45 operands: lhs = Expression(46, Sub), rhs = Counter(5)
-- expression 46 operands: lhs = Expression(47, Add), rhs = Counter(6)
-- expression 47 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
-- expression 48 operands: lhs = Counter(3), rhs = Zero
-- expression 49 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 9 operands: lhs = Expression(46, Add), rhs = Counter(6)
+- expression 10 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
+- expression 11 operands: lhs = Counter(3), rhs = Zero
+- expression 12 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 13 operands: lhs = Expression(45, Sub), rhs = Counter(5)
+- expression 14 operands: lhs = Expression(46, Add), rhs = Counter(6)
+- expression 15 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
+- expression 16 operands: lhs = Counter(3), rhs = Zero
+- expression 17 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 18 operands: lhs = Expression(44, Sub), rhs = Counter(7)
+- expression 19 operands: lhs = Expression(45, Sub), rhs = Counter(5)
+- expression 20 operands: lhs = Expression(46, Add), rhs = Counter(6)
+- expression 21 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
+- expression 22 operands: lhs = Counter(3), rhs = Zero
+- expression 23 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 24 operands: lhs = Zero, rhs = Expression(43, Sub)
+- expression 25 operands: lhs = Expression(44, Sub), rhs = Counter(7)
+- expression 26 operands: lhs = Expression(45, Sub), rhs = Counter(5)
+- expression 27 operands: lhs = Expression(46, Add), rhs = Counter(6)
+- expression 28 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
+- expression 29 operands: lhs = Counter(3), rhs = Zero
+- expression 30 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 31 operands: lhs = Expression(42, Add), rhs = Counter(4)
+- expression 32 operands: lhs = Zero, rhs = Expression(43, Sub)
+- expression 33 operands: lhs = Expression(44, Sub), rhs = Counter(7)
+- expression 34 operands: lhs = Expression(45, Sub), rhs = Counter(5)
+- expression 35 operands: lhs = Expression(46, Add), rhs = Counter(6)
+- expression 36 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
+- expression 37 operands: lhs = Counter(3), rhs = Zero
+- expression 38 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 39 operands: lhs = Counter(9), rhs = Expression(40, Add)
+- expression 40 operands: lhs = Expression(41, Sub), rhs = Counter(6)
+- expression 41 operands: lhs = Expression(42, Add), rhs = Counter(4)
+- expression 42 operands: lhs = Zero, rhs = Expression(43, Sub)
+- expression 43 operands: lhs = Expression(44, Sub), rhs = Counter(7)
+- expression 44 operands: lhs = Expression(45, Sub), rhs = Counter(5)
+- expression 45 operands: lhs = Expression(46, Add), rhs = Counter(6)
+- expression 46 operands: lhs = Expression(47, Add), rhs = Expression(48, Add)
+- expression 47 operands: lhs = Counter(3), rhs = Zero
+- expression 48 operands: lhs = Counter(4), rhs = Counter(5)
 Number of file 0 mappings: 20
 - Code(Counter(0)) at (prev + 9, 5) to (start + 1, 16)
 - Code(Counter(1)) at (prev + 2, 16) to (start + 0, 21)
@@ -64,84 +63,83 @@ Number of file 0 mappings: 20
     = (Zero + (c1 - c2))
 - Code(Counter(9)) at (prev + 0, 30) to (start + 0, 31)
 - Code(Zero) at (prev + 1, 16) to (start + 1, 10)
-- Code(Expression(46, Sub)) at (prev + 3, 13) to (start + 0, 14)
+- Code(Expression(45, Sub)) at (prev + 3, 13) to (start + 0, 14)
     = (((c3 + Zero) + (c4 + c5)) - c6)
-- Code(Expression(47, Add)) at (prev + 0, 18) to (start + 0, 23)
+- Code(Expression(46, Add)) at (prev + 0, 18) to (start + 0, 23)
     = ((c3 + Zero) + (c4 + c5))
-- Code(Expression(9, Add)) at (prev + 1, 16) to (start + 0, 20)
-    = ((((c3 + Zero) + (c4 + c5)) - c6) + Zero)
-- Code(Expression(45, Sub)) at (prev + 1, 20) to (start + 0, 25)
+- Code(Expression(45, Sub)) at (prev + 1, 16) to (start + 0, 20)
+    = (((c3 + Zero) + (c4 + c5)) - c6)
+- Code(Expression(44, Sub)) at (prev + 1, 20) to (start + 0, 25)
     = ((((c3 + Zero) + (c4 + c5)) - c6) - c5)
 - Code(Zero) at (prev + 1, 27) to (start + 0, 31)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 34)
-- Code(Expression(44, Sub)) at (prev + 1, 18) to (start + 0, 19)
+- Code(Expression(43, Sub)) at (prev + 1, 18) to (start + 0, 19)
     = (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7)
-- Code(Expression(43, Add)) at (prev + 1, 17) to (start + 0, 34)
+- Code(Expression(42, Add)) at (prev + 1, 17) to (start + 0, 34)
     = (Zero + (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7))
-- Code(Expression(42, Sub)) at (prev + 0, 34) to (start + 0, 35)
+- Code(Expression(41, Sub)) at (prev + 0, 34) to (start + 0, 35)
     = ((Zero + (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7)) - c4)
 - Code(Zero) at (prev + 1, 20) to (start + 1, 14)
 - Code(Counter(6)) at (prev + 3, 9) to (start + 0, 15)
-- Code(Expression(40, Add)) at (prev + 1, 5) to (start + 0, 6)
+- Code(Expression(39, Add)) at (prev + 1, 5) to (start + 0, 6)
     = (c9 + (((Zero + (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7)) - c4) + c6))
 
 Function name: <loops_branches::DisplayTest as core::fmt::Display>::fmt
-Raw bytes (255): 0x[01, 01, 34, 01, 05, 02, 09, 00, 0e, 02, 09, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, c7, 01, cb, 01, 05, 0d, 11, 15, be, 01, 00, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, 00, b6, 01, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, b3, 01, 15, 00, b6, 01, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, ae, 01, cf, 01, b3, 01, 15, 00, b6, 01, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, 19, 25, 14, 01, 22, 05, 01, 11, 00, 01, 12, 01, 0a, 02, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 0e, 01, 0e, 00, 0f, 0b, 01, 0d, 00, 1e, 25, 00, 1e, 00, 1f, be, 01, 02, 0d, 00, 0e, c3, 01, 00, 12, 00, 17, 2f, 01, 10, 00, 15, 00, 00, 16, 01, 0e, ba, 01, 02, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, b6, 01, 01, 12, 00, 13, b3, 01, 01, 11, 00, 22, ae, 01, 00, 22, 00, 23, 19, 03, 09, 00, 0f, ab, 01, 01, 05, 00, 06]
+Raw bytes (253): 0x[01, 01, 33, 01, 05, 02, 09, 00, 0e, 02, 09, bf, 01, 19, c3, 01, c7, 01, 05, 0d, 11, 15, c3, 01, c7, 01, 05, 0d, 11, 15, bf, 01, 19, c3, 01, c7, 01, 05, 0d, 11, 15, ba, 01, 11, bf, 01, 19, c3, 01, c7, 01, 05, 0d, 11, 15, b6, 01, 1d, ba, 01, 11, bf, 01, 19, c3, 01, c7, 01, 05, 0d, 11, 15, 00, b2, 01, b6, 01, 1d, ba, 01, 11, bf, 01, 19, c3, 01, c7, 01, 05, 0d, 11, 15, af, 01, 15, 00, b2, 01, b6, 01, 1d, ba, 01, 11, bf, 01, 19, c3, 01, c7, 01, 05, 0d, 11, 15, aa, 01, cb, 01, af, 01, 15, 00, b2, 01, b6, 01, 1d, ba, 01, 11, bf, 01, 19, c3, 01, c7, 01, 05, 0d, 11, 15, 19, 25, 14, 01, 22, 05, 01, 11, 00, 01, 12, 01, 0a, 02, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 0e, 01, 0e, 00, 0f, 0b, 01, 0d, 00, 1e, 25, 00, 1e, 00, 1f, ba, 01, 02, 0d, 00, 0e, bf, 01, 00, 12, 00, 17, ba, 01, 01, 10, 00, 15, 00, 00, 16, 01, 0e, b6, 01, 02, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, b2, 01, 01, 12, 00, 13, af, 01, 01, 11, 00, 22, aa, 01, 00, 22, 00, 23, 19, 03, 09, 00, 0f, a7, 01, 01, 05, 00, 06]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 52
+Number of expressions: 51
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 1 operands: lhs = Expression(0, Sub), rhs = Counter(2)
 - expression 2 operands: lhs = Zero, rhs = Expression(3, Sub)
 - expression 3 operands: lhs = Expression(0, Sub), rhs = Counter(2)
-- expression 4 operands: lhs = Expression(48, Add), rhs = Counter(6)
-- expression 5 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
+- expression 4 operands: lhs = Expression(47, Add), rhs = Counter(6)
+- expression 5 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
 - expression 6 operands: lhs = Counter(1), rhs = Counter(3)
 - expression 7 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 8 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
+- expression 8 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
 - expression 9 operands: lhs = Counter(1), rhs = Counter(3)
 - expression 10 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 11 operands: lhs = Expression(47, Sub), rhs = Zero
-- expression 12 operands: lhs = Expression(48, Add), rhs = Counter(6)
-- expression 13 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
-- expression 14 operands: lhs = Counter(1), rhs = Counter(3)
-- expression 15 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 16 operands: lhs = Expression(47, Sub), rhs = Counter(4)
-- expression 17 operands: lhs = Expression(48, Add), rhs = Counter(6)
-- expression 18 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
-- expression 19 operands: lhs = Counter(1), rhs = Counter(3)
-- expression 20 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 21 operands: lhs = Expression(46, Sub), rhs = Counter(7)
-- expression 22 operands: lhs = Expression(47, Sub), rhs = Counter(4)
-- expression 23 operands: lhs = Expression(48, Add), rhs = Counter(6)
-- expression 24 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
-- expression 25 operands: lhs = Counter(1), rhs = Counter(3)
-- expression 26 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 27 operands: lhs = Zero, rhs = Expression(45, Sub)
-- expression 28 operands: lhs = Expression(46, Sub), rhs = Counter(7)
-- expression 29 operands: lhs = Expression(47, Sub), rhs = Counter(4)
-- expression 30 operands: lhs = Expression(48, Add), rhs = Counter(6)
-- expression 31 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
-- expression 32 operands: lhs = Counter(1), rhs = Counter(3)
-- expression 33 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 34 operands: lhs = Expression(44, Add), rhs = Counter(5)
-- expression 35 operands: lhs = Zero, rhs = Expression(45, Sub)
-- expression 36 operands: lhs = Expression(46, Sub), rhs = Counter(7)
-- expression 37 operands: lhs = Expression(47, Sub), rhs = Counter(4)
-- expression 38 operands: lhs = Expression(48, Add), rhs = Counter(6)
-- expression 39 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
-- expression 40 operands: lhs = Counter(1), rhs = Counter(3)
-- expression 41 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 42 operands: lhs = Expression(43, Sub), rhs = Expression(51, Add)
-- expression 43 operands: lhs = Expression(44, Add), rhs = Counter(5)
-- expression 44 operands: lhs = Zero, rhs = Expression(45, Sub)
-- expression 45 operands: lhs = Expression(46, Sub), rhs = Counter(7)
-- expression 46 operands: lhs = Expression(47, Sub), rhs = Counter(4)
-- expression 47 operands: lhs = Expression(48, Add), rhs = Counter(6)
-- expression 48 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
-- expression 49 operands: lhs = Counter(1), rhs = Counter(3)
-- expression 50 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 51 operands: lhs = Counter(6), rhs = Counter(9)
+- expression 11 operands: lhs = Expression(47, Add), rhs = Counter(6)
+- expression 12 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 13 operands: lhs = Counter(1), rhs = Counter(3)
+- expression 14 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 15 operands: lhs = Expression(46, Sub), rhs = Counter(4)
+- expression 16 operands: lhs = Expression(47, Add), rhs = Counter(6)
+- expression 17 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 18 operands: lhs = Counter(1), rhs = Counter(3)
+- expression 19 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 20 operands: lhs = Expression(45, Sub), rhs = Counter(7)
+- expression 21 operands: lhs = Expression(46, Sub), rhs = Counter(4)
+- expression 22 operands: lhs = Expression(47, Add), rhs = Counter(6)
+- expression 23 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 24 operands: lhs = Counter(1), rhs = Counter(3)
+- expression 25 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 26 operands: lhs = Zero, rhs = Expression(44, Sub)
+- expression 27 operands: lhs = Expression(45, Sub), rhs = Counter(7)
+- expression 28 operands: lhs = Expression(46, Sub), rhs = Counter(4)
+- expression 29 operands: lhs = Expression(47, Add), rhs = Counter(6)
+- expression 30 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 31 operands: lhs = Counter(1), rhs = Counter(3)
+- expression 32 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 33 operands: lhs = Expression(43, Add), rhs = Counter(5)
+- expression 34 operands: lhs = Zero, rhs = Expression(44, Sub)
+- expression 35 operands: lhs = Expression(45, Sub), rhs = Counter(7)
+- expression 36 operands: lhs = Expression(46, Sub), rhs = Counter(4)
+- expression 37 operands: lhs = Expression(47, Add), rhs = Counter(6)
+- expression 38 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 39 operands: lhs = Counter(1), rhs = Counter(3)
+- expression 40 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 41 operands: lhs = Expression(42, Sub), rhs = Expression(50, Add)
+- expression 42 operands: lhs = Expression(43, Add), rhs = Counter(5)
+- expression 43 operands: lhs = Zero, rhs = Expression(44, Sub)
+- expression 44 operands: lhs = Expression(45, Sub), rhs = Counter(7)
+- expression 45 operands: lhs = Expression(46, Sub), rhs = Counter(4)
+- expression 46 operands: lhs = Expression(47, Add), rhs = Counter(6)
+- expression 47 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
+- expression 48 operands: lhs = Counter(1), rhs = Counter(3)
+- expression 49 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 50 operands: lhs = Counter(6), rhs = Counter(9)
 Number of file 0 mappings: 20
 - Code(Counter(0)) at (prev + 34, 5) to (start + 1, 17)
 - Code(Zero) at (prev + 1, 18) to (start + 1, 10)
@@ -154,25 +152,25 @@ Number of file 0 mappings: 20
 - Code(Expression(2, Add)) at (prev + 1, 13) to (start + 0, 30)
     = (Zero + ((c0 - c1) - c2))
 - Code(Counter(9)) at (prev + 0, 30) to (start + 0, 31)
-- Code(Expression(47, Sub)) at (prev + 2, 13) to (start + 0, 14)
+- Code(Expression(46, Sub)) at (prev + 2, 13) to (start + 0, 14)
     = (((c1 + c3) + (c4 + c5)) - c6)
-- Code(Expression(48, Add)) at (prev + 0, 18) to (start + 0, 23)
+- Code(Expression(47, Add)) at (prev + 0, 18) to (start + 0, 23)
     = ((c1 + c3) + (c4 + c5))
-- Code(Expression(11, Add)) at (prev + 1, 16) to (start + 0, 21)
-    = ((((c1 + c3) + (c4 + c5)) - c6) + Zero)
+- Code(Expression(46, Sub)) at (prev + 1, 16) to (start + 0, 21)
+    = (((c1 + c3) + (c4 + c5)) - c6)
 - Code(Zero) at (prev + 0, 22) to (start + 1, 14)
-- Code(Expression(46, Sub)) at (prev + 2, 20) to (start + 0, 25)
+- Code(Expression(45, Sub)) at (prev + 2, 20) to (start + 0, 25)
     = ((((c1 + c3) + (c4 + c5)) - c6) - c4)
 - Code(Zero) at (prev + 1, 27) to (start + 0, 31)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 34)
-- Code(Expression(45, Sub)) at (prev + 1, 18) to (start + 0, 19)
+- Code(Expression(44, Sub)) at (prev + 1, 18) to (start + 0, 19)
     = (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7)
-- Code(Expression(44, Add)) at (prev + 1, 17) to (start + 0, 34)
+- Code(Expression(43, Add)) at (prev + 1, 17) to (start + 0, 34)
     = (Zero + (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7))
-- Code(Expression(43, Sub)) at (prev + 0, 34) to (start + 0, 35)
+- Code(Expression(42, Sub)) at (prev + 0, 34) to (start + 0, 35)
     = ((Zero + (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7)) - c5)
 - Code(Counter(6)) at (prev + 3, 9) to (start + 0, 15)
-- Code(Expression(42, Add)) at (prev + 1, 5) to (start + 0, 6)
+- Code(Expression(41, Add)) at (prev + 1, 5) to (start + 0, 6)
     = (((Zero + (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7)) - c5) + (c6 + c9))
 
 Function name: loops_branches::main
diff --git a/tests/coverage-map/status-quo/no_cov_crate.cov-map b/tests/coverage-map/status-quo/no_cov_crate.cov-map
index 7ab5995dc28..05b6448bbd2 100644
--- a/tests/coverage-map/status-quo/no_cov_crate.cov-map
+++ b/tests/coverage-map/status-quo/no_cov_crate.cov-map
@@ -15,12 +15,12 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 24, 1) to (start + 2, 2)
 
 Function name: no_cov_crate::add_coverage_not_called (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 1d, 01, 02, 02]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 1d, 01, 02, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 29, 1) to (start + 2, 2)
+- Code(Zero) at (prev + 29, 1) to (start + 2, 2)
 
 Function name: no_cov_crate::main
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 4d, 01, 0b, 02]
diff --git a/tests/coverage-map/status-quo/partial_eq.cov-map b/tests/coverage-map/status-quo/partial_eq.cov-map
index dd61cd77ab6..3549116db7a 100644
--- a/tests/coverage-map/status-quo/partial_eq.cov-map
+++ b/tests/coverage-map/status-quo/partial_eq.cov-map
@@ -1,27 +1,27 @@
 Function name: <partial_eq::Version as core::clone::Clone>::clone (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 04, 0a, 00, 0f]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 04, 0a, 00, 0f]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 4, 10) to (start + 0, 15)
+- Code(Zero) at (prev + 4, 10) to (start + 0, 15)
 
 Function name: <partial_eq::Version as core::cmp::Ord>::cmp (unused)
-Raw bytes (14): 0x[01, 01, 00, 02, 01, 04, 33, 00, 34, 00, 00, 35, 00, 36]
+Raw bytes (14): 0x[01, 01, 00, 02, 00, 04, 33, 00, 34, 00, 00, 35, 00, 36]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 2
-- Code(Counter(0)) at (prev + 4, 51) to (start + 0, 52)
+- Code(Zero) at (prev + 4, 51) to (start + 0, 52)
 - Code(Zero) at (prev + 0, 53) to (start + 0, 54)
 
 Function name: <partial_eq::Version as core::cmp::PartialEq>::eq (unused)
-Raw bytes (14): 0x[01, 01, 00, 02, 01, 04, 18, 00, 19, 00, 00, 20, 00, 21]
+Raw bytes (14): 0x[01, 01, 00, 02, 00, 04, 18, 00, 19, 00, 00, 20, 00, 21]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 2
-- Code(Counter(0)) at (prev + 4, 24) to (start + 0, 25)
+- Code(Zero) at (prev + 4, 24) to (start + 0, 25)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 33)
 
 Function name: <partial_eq::Version as core::cmp::PartialOrd>::partial_cmp
diff --git a/tests/coverage-map/status-quo/simple_loop.cov-map b/tests/coverage-map/status-quo/simple_loop.cov-map
index eb49c2324cc..f1691ffc5e6 100644
--- a/tests/coverage-map/status-quo/simple_loop.cov-map
+++ b/tests/coverage-map/status-quo/simple_loop.cov-map
@@ -1,28 +1,27 @@
 Function name: simple_loop::main
-Raw bytes (59): 0x[01, 01, 0a, 01, 05, 27, 09, 05, 02, 23, 09, 27, 09, 05, 02, 1e, 00, 23, 09, 27, 09, 05, 02, 07, 01, 03, 01, 09, 10, 05, 0a, 05, 05, 06, 02, 05, 06, 00, 07, 23, 05, 0d, 02, 0e, 1e, 04, 0d, 00, 12, 09, 02, 0a, 03, 0a, 1b, 06, 01, 00, 02]
+Raw bytes (57): 0x[01, 01, 09, 01, 05, 23, 09, 05, 02, 1f, 09, 23, 09, 05, 02, 1f, 09, 23, 09, 05, 02, 07, 01, 03, 01, 09, 10, 05, 0a, 05, 05, 06, 02, 05, 06, 00, 07, 1f, 05, 0d, 02, 0e, 1a, 04, 0d, 00, 12, 09, 02, 0a, 03, 0a, 1a, 06, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 10
+Number of expressions: 9
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Expression(9, Add), rhs = Counter(2)
+- expression 1 operands: lhs = Expression(8, Add), rhs = Counter(2)
 - expression 2 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 3 operands: lhs = Expression(8, Add), rhs = Counter(2)
-- expression 4 operands: lhs = Expression(9, Add), rhs = Counter(2)
+- expression 3 operands: lhs = Expression(7, Add), rhs = Counter(2)
+- expression 4 operands: lhs = Expression(8, Add), rhs = Counter(2)
 - expression 5 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 6 operands: lhs = Expression(7, Sub), rhs = Zero
+- expression 6 operands: lhs = Expression(7, Add), rhs = Counter(2)
 - expression 7 operands: lhs = Expression(8, Add), rhs = Counter(2)
-- expression 8 operands: lhs = Expression(9, Add), rhs = Counter(2)
-- expression 9 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 8 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 7
 - Code(Counter(0)) at (prev + 3, 1) to (start + 9, 16)
 - Code(Counter(1)) at (prev + 10, 5) to (start + 5, 6)
 - Code(Expression(0, Sub)) at (prev + 5, 6) to (start + 0, 7)
     = (c0 - c1)
-- Code(Expression(8, Add)) at (prev + 5, 13) to (start + 2, 14)
+- Code(Expression(7, Add)) at (prev + 5, 13) to (start + 2, 14)
     = ((c1 + (c0 - c1)) + c2)
-- Code(Expression(7, Sub)) at (prev + 4, 13) to (start + 0, 18)
+- Code(Expression(6, Sub)) at (prev + 4, 13) to (start + 0, 18)
     = (((c1 + (c0 - c1)) + c2) - c2)
 - Code(Counter(2)) at (prev + 2, 10) to (start + 3, 10)
-- Code(Expression(6, Add)) at (prev + 6, 1) to (start + 0, 2)
-    = ((((c1 + (c0 - c1)) + c2) - c2) + Zero)
+- Code(Expression(6, Sub)) at (prev + 6, 1) to (start + 0, 2)
+    = (((c1 + (c0 - c1)) + c2) - c2)
 
diff --git a/tests/coverage-map/status-quo/simple_match.cov-map b/tests/coverage-map/status-quo/simple_match.cov-map
index d5389f04b26..4a32745d292 100644
--- a/tests/coverage-map/status-quo/simple_match.cov-map
+++ b/tests/coverage-map/status-quo/simple_match.cov-map
@@ -1,36 +1,33 @@
 Function name: simple_match::main
-Raw bytes (82): 0x[01, 01, 0e, 01, 05, 2f, 33, 05, 02, 09, 0d, 2b, 11, 2f, 33, 05, 02, 09, 0d, 26, 00, 2b, 11, 2f, 33, 05, 02, 09, 0d, 09, 00, 0a, 01, 03, 01, 07, 0f, 05, 07, 10, 02, 06, 02, 02, 06, 00, 07, 2b, 05, 09, 00, 0d, 26, 05, 0d, 00, 16, 09, 02, 0d, 00, 0e, 23, 02, 11, 02, 12, 37, 04, 0d, 07, 0e, 0d, 0a, 0d, 00, 0f, 11, 03, 01, 00, 02]
+Raw bytes (78): 0x[01, 01, 0c, 01, 05, 2b, 2f, 05, 02, 09, 0d, 27, 11, 2b, 2f, 05, 02, 09, 0d, 27, 11, 2b, 2f, 05, 02, 09, 0d, 0a, 01, 03, 01, 07, 0f, 05, 07, 10, 02, 06, 02, 02, 06, 00, 07, 27, 05, 09, 00, 0d, 22, 05, 0d, 00, 16, 09, 02, 0d, 00, 0e, 22, 02, 11, 02, 12, 09, 04, 0d, 07, 0e, 0d, 0a, 0d, 00, 0f, 11, 03, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 14
+Number of expressions: 12
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Expression(11, Add), rhs = Expression(12, Add)
+- expression 1 operands: lhs = Expression(10, Add), rhs = Expression(11, Add)
 - expression 2 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 - expression 3 operands: lhs = Counter(2), rhs = Counter(3)
-- expression 4 operands: lhs = Expression(10, Add), rhs = Counter(4)
-- expression 5 operands: lhs = Expression(11, Add), rhs = Expression(12, Add)
+- expression 4 operands: lhs = Expression(9, Add), rhs = Counter(4)
+- expression 5 operands: lhs = Expression(10, Add), rhs = Expression(11, Add)
 - expression 6 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 - expression 7 operands: lhs = Counter(2), rhs = Counter(3)
-- expression 8 operands: lhs = Expression(9, Sub), rhs = Zero
-- expression 9 operands: lhs = Expression(10, Add), rhs = Counter(4)
-- expression 10 operands: lhs = Expression(11, Add), rhs = Expression(12, Add)
-- expression 11 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-- expression 12 operands: lhs = Counter(2), rhs = Counter(3)
-- expression 13 operands: lhs = Counter(2), rhs = Zero
+- expression 8 operands: lhs = Expression(9, Add), rhs = Counter(4)
+- expression 9 operands: lhs = Expression(10, Add), rhs = Expression(11, Add)
+- expression 10 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+- expression 11 operands: lhs = Counter(2), rhs = Counter(3)
 Number of file 0 mappings: 10
 - Code(Counter(0)) at (prev + 3, 1) to (start + 7, 15)
 - Code(Counter(1)) at (prev + 7, 16) to (start + 2, 6)
 - Code(Expression(0, Sub)) at (prev + 2, 6) to (start + 0, 7)
     = (c0 - c1)
-- Code(Expression(10, Add)) at (prev + 5, 9) to (start + 0, 13)
+- Code(Expression(9, Add)) at (prev + 5, 9) to (start + 0, 13)
     = ((c1 + (c0 - c1)) + (c2 + c3))
-- Code(Expression(9, Sub)) at (prev + 5, 13) to (start + 0, 22)
+- Code(Expression(8, Sub)) at (prev + 5, 13) to (start + 0, 22)
     = (((c1 + (c0 - c1)) + (c2 + c3)) - c4)
 - Code(Counter(2)) at (prev + 2, 13) to (start + 0, 14)
-- Code(Expression(8, Add)) at (prev + 2, 17) to (start + 2, 18)
-    = ((((c1 + (c0 - c1)) + (c2 + c3)) - c4) + Zero)
-- Code(Expression(13, Add)) at (prev + 4, 13) to (start + 7, 14)
-    = (c2 + Zero)
+- Code(Expression(8, Sub)) at (prev + 2, 17) to (start + 2, 18)
+    = (((c1 + (c0 - c1)) + (c2 + c3)) - c4)
+- Code(Counter(2)) at (prev + 4, 13) to (start + 7, 14)
 - Code(Counter(3)) at (prev + 10, 13) to (start + 0, 15)
 - Code(Counter(4)) at (prev + 3, 1) to (start + 0, 2)
 
diff --git a/tests/coverage-map/status-quo/test_harness.cov-map b/tests/coverage-map/status-quo/test_harness.cov-map
index b0e955dd142..6940d2e2824 100644
--- a/tests/coverage-map/status-quo/test_harness.cov-map
+++ b/tests/coverage-map/status-quo/test_harness.cov-map
@@ -15,10 +15,10 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 9, 1) to (start + 0, 8)
 
 Function name: test_harness::unused (unused)
-Raw bytes (9): 0x[01, 01, 00, 01, 01, 07, 01, 00, 0f]
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 07, 01, 00, 0f]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 1
-- Code(Counter(0)) at (prev + 7, 1) to (start + 0, 15)
+- Code(Zero) at (prev + 7, 1) to (start + 0, 15)
 
diff --git a/tests/coverage-map/status-quo/try_error_result.cov-map b/tests/coverage-map/status-quo/try_error_result.cov-map
index b52e78d1195..8367103a21a 100644
--- a/tests/coverage-map/status-quo/try_error_result.cov-map
+++ b/tests/coverage-map/status-quo/try_error_result.cov-map
@@ -91,136 +91,130 @@ Number of file 0 mappings: 11
     = ((c4 + (c5 + c6)) + c3)
 
 Function name: try_error_result::test2
-Raw bytes (373): 0x[01, 01, 41, 01, 07, 05, 09, 03, 0d, 41, 11, 52, 15, 41, 11, 4a, 1d, 4e, 19, 52, 15, 41, 11, 4e, 00, 52, 15, 41, 11, 4e, 19, 52, 15, 41, 11, 46, 00, 4a, 1d, 4e, 19, 52, 15, 41, 11, 6a, 25, 49, 21, 49, 21, 66, 00, 6a, 25, 49, 21, 9a, 01, 2d, 9e, 01, 29, a2, 01, 41, 03, 0d, a2, 01, 41, 03, 0d, 9e, 01, 29, a2, 01, 41, 03, 0d, 96, 01, 00, 9a, 01, 2d, 9e, 01, 29, a2, 01, 41, 03, 0d, ba, 01, 35, 45, 31, 45, 31, b6, 01, 00, ba, 01, 35, 45, 31, d2, 01, 3d, 4d, 39, 4d, 39, ce, 01, 00, d2, 01, 3d, 4d, 39, db, 01, 0d, 11, df, 01, e3, 01, f3, 01, 15, e7, 01, eb, 01, ef, 01, 19, 1d, 21, 25, f7, 01, fb, 01, 29, 2d, ff, 01, 83, 02, 31, 35, 39, 3d, 28, 01, 3c, 01, 03, 17, 03, 08, 09, 00, 0e, a2, 01, 02, 09, 04, 1a, 41, 06, 0d, 00, 2f, 11, 00, 2f, 00, 30, 52, 00, 31, 03, 35, 15, 04, 11, 00, 12, 4e, 02, 11, 04, 12, 46, 05, 11, 00, 14, 2b, 00, 17, 00, 41, 19, 00, 41, 00, 42, 4a, 00, 43, 00, 5f, 1d, 00, 5f, 00, 60, 43, 01, 0d, 00, 20, 66, 01, 11, 00, 14, 49, 00, 17, 00, 41, 21, 00, 41, 00, 42, 6a, 00, 43, 00, 60, 25, 00, 60, 00, 61, 63, 01, 0d, 00, 20, 96, 01, 04, 11, 00, 14, 9e, 01, 00, 17, 00, 42, 29, 00, 42, 00, 43, 9a, 01, 00, 44, 00, 61, 2d, 00, 61, 00, 62, 93, 01, 01, 0d, 00, 20, b6, 01, 01, 11, 00, 14, 45, 00, 17, 01, 36, 31, 01, 36, 00, 37, ba, 01, 01, 12, 00, 2f, 35, 00, 2f, 00, 30, b3, 01, 01, 0d, 00, 20, ce, 01, 01, 11, 00, 14, 4d, 00, 17, 01, 36, 39, 02, 11, 00, 12, d2, 01, 01, 12, 00, 2f, 3d, 01, 11, 00, 12, cb, 01, 02, 0d, 00, 20, 0d, 03, 05, 00, 0b, d7, 01, 01, 01, 00, 02]
+Raw bytes (358): 0x[01, 01, 3b, 01, 07, 05, 09, 03, 0d, 41, 11, 4a, 15, 41, 11, 42, 1d, 46, 19, 4a, 15, 41, 11, 4a, 15, 41, 11, 46, 19, 4a, 15, 41, 11, 42, 1d, 46, 19, 4a, 15, 41, 11, 5e, 25, 49, 21, 49, 21, 5e, 25, 49, 21, 8a, 01, 2d, 8e, 01, 29, 92, 01, 41, 03, 0d, 92, 01, 41, 03, 0d, 8e, 01, 29, 92, 01, 41, 03, 0d, 8a, 01, 2d, 8e, 01, 29, 92, 01, 41, 03, 0d, a6, 01, 35, 45, 31, 45, 31, a6, 01, 35, 45, 31, ba, 01, 3d, 4d, 39, 4d, 39, ba, 01, 3d, 4d, 39, c3, 01, 0d, 11, c7, 01, cb, 01, db, 01, 15, cf, 01, d3, 01, d7, 01, 19, 1d, 21, 25, df, 01, e3, 01, 29, 2d, e7, 01, eb, 01, 31, 35, 39, 3d, 28, 01, 3c, 01, 03, 17, 03, 08, 09, 00, 0e, 92, 01, 02, 09, 04, 1a, 41, 06, 0d, 00, 2f, 11, 00, 2f, 00, 30, 4a, 00, 31, 03, 35, 15, 04, 11, 00, 12, 46, 02, 11, 04, 12, 3e, 05, 11, 00, 14, 46, 00, 17, 00, 41, 19, 00, 41, 00, 42, 42, 00, 43, 00, 5f, 1d, 00, 5f, 00, 60, 3e, 01, 0d, 00, 20, 5a, 01, 11, 00, 14, 49, 00, 17, 00, 41, 21, 00, 41, 00, 42, 5e, 00, 43, 00, 60, 25, 00, 60, 00, 61, 5a, 01, 0d, 00, 20, 86, 01, 04, 11, 00, 14, 8e, 01, 00, 17, 00, 42, 29, 00, 42, 00, 43, 8a, 01, 00, 44, 00, 61, 2d, 00, 61, 00, 62, 86, 01, 01, 0d, 00, 20, a2, 01, 01, 11, 00, 14, 45, 00, 17, 01, 36, 31, 01, 36, 00, 37, a6, 01, 01, 12, 00, 2f, 35, 00, 2f, 00, 30, a2, 01, 01, 0d, 00, 20, b6, 01, 01, 11, 00, 14, 4d, 00, 17, 01, 36, 39, 02, 11, 00, 12, ba, 01, 01, 12, 00, 2f, 3d, 01, 11, 00, 12, b6, 01, 02, 0d, 00, 20, 0d, 03, 05, 00, 0b, bf, 01, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 65
+Number of expressions: 59
 - expression 0 operands: lhs = Counter(0), rhs = Expression(1, Add)
 - expression 1 operands: lhs = Counter(1), rhs = Counter(2)
 - expression 2 operands: lhs = Expression(0, Add), rhs = Counter(3)
 - expression 3 operands: lhs = Counter(16), rhs = Counter(4)
-- expression 4 operands: lhs = Expression(20, Sub), rhs = Counter(5)
+- expression 4 operands: lhs = Expression(18, Sub), rhs = Counter(5)
 - expression 5 operands: lhs = Counter(16), rhs = Counter(4)
-- expression 6 operands: lhs = Expression(18, Sub), rhs = Counter(7)
-- expression 7 operands: lhs = Expression(19, Sub), rhs = Counter(6)
-- expression 8 operands: lhs = Expression(20, Sub), rhs = Counter(5)
+- expression 6 operands: lhs = Expression(16, Sub), rhs = Counter(7)
+- expression 7 operands: lhs = Expression(17, Sub), rhs = Counter(6)
+- expression 8 operands: lhs = Expression(18, Sub), rhs = Counter(5)
 - expression 9 operands: lhs = Counter(16), rhs = Counter(4)
-- expression 10 operands: lhs = Expression(19, Sub), rhs = Zero
-- expression 11 operands: lhs = Expression(20, Sub), rhs = Counter(5)
-- expression 12 operands: lhs = Counter(16), rhs = Counter(4)
-- expression 13 operands: lhs = Expression(19, Sub), rhs = Counter(6)
-- expression 14 operands: lhs = Expression(20, Sub), rhs = Counter(5)
-- expression 15 operands: lhs = Counter(16), rhs = Counter(4)
-- expression 16 operands: lhs = Expression(17, Sub), rhs = Zero
-- expression 17 operands: lhs = Expression(18, Sub), rhs = Counter(7)
-- expression 18 operands: lhs = Expression(19, Sub), rhs = Counter(6)
-- expression 19 operands: lhs = Expression(20, Sub), rhs = Counter(5)
-- expression 20 operands: lhs = Counter(16), rhs = Counter(4)
-- expression 21 operands: lhs = Expression(26, Sub), rhs = Counter(9)
-- expression 22 operands: lhs = Counter(18), rhs = Counter(8)
+- expression 10 operands: lhs = Expression(18, Sub), rhs = Counter(5)
+- expression 11 operands: lhs = Counter(16), rhs = Counter(4)
+- expression 12 operands: lhs = Expression(17, Sub), rhs = Counter(6)
+- expression 13 operands: lhs = Expression(18, Sub), rhs = Counter(5)
+- expression 14 operands: lhs = Counter(16), rhs = Counter(4)
+- expression 15 operands: lhs = Expression(16, Sub), rhs = Counter(7)
+- expression 16 operands: lhs = Expression(17, Sub), rhs = Counter(6)
+- expression 17 operands: lhs = Expression(18, Sub), rhs = Counter(5)
+- expression 18 operands: lhs = Counter(16), rhs = Counter(4)
+- expression 19 operands: lhs = Expression(23, Sub), rhs = Counter(9)
+- expression 20 operands: lhs = Counter(18), rhs = Counter(8)
+- expression 21 operands: lhs = Counter(18), rhs = Counter(8)
+- expression 22 operands: lhs = Expression(23, Sub), rhs = Counter(9)
 - expression 23 operands: lhs = Counter(18), rhs = Counter(8)
-- expression 24 operands: lhs = Expression(25, Sub), rhs = Zero
-- expression 25 operands: lhs = Expression(26, Sub), rhs = Counter(9)
-- expression 26 operands: lhs = Counter(18), rhs = Counter(8)
-- expression 27 operands: lhs = Expression(38, Sub), rhs = Counter(11)
-- expression 28 operands: lhs = Expression(39, Sub), rhs = Counter(10)
-- expression 29 operands: lhs = Expression(40, Sub), rhs = Counter(16)
-- expression 30 operands: lhs = Expression(0, Add), rhs = Counter(3)
-- expression 31 operands: lhs = Expression(40, Sub), rhs = Counter(16)
+- expression 24 operands: lhs = Expression(34, Sub), rhs = Counter(11)
+- expression 25 operands: lhs = Expression(35, Sub), rhs = Counter(10)
+- expression 26 operands: lhs = Expression(36, Sub), rhs = Counter(16)
+- expression 27 operands: lhs = Expression(0, Add), rhs = Counter(3)
+- expression 28 operands: lhs = Expression(36, Sub), rhs = Counter(16)
+- expression 29 operands: lhs = Expression(0, Add), rhs = Counter(3)
+- expression 30 operands: lhs = Expression(35, Sub), rhs = Counter(10)
+- expression 31 operands: lhs = Expression(36, Sub), rhs = Counter(16)
 - expression 32 operands: lhs = Expression(0, Add), rhs = Counter(3)
-- expression 33 operands: lhs = Expression(39, Sub), rhs = Counter(10)
-- expression 34 operands: lhs = Expression(40, Sub), rhs = Counter(16)
-- expression 35 operands: lhs = Expression(0, Add), rhs = Counter(3)
-- expression 36 operands: lhs = Expression(37, Sub), rhs = Zero
-- expression 37 operands: lhs = Expression(38, Sub), rhs = Counter(11)
-- expression 38 operands: lhs = Expression(39, Sub), rhs = Counter(10)
-- expression 39 operands: lhs = Expression(40, Sub), rhs = Counter(16)
-- expression 40 operands: lhs = Expression(0, Add), rhs = Counter(3)
-- expression 41 operands: lhs = Expression(46, Sub), rhs = Counter(13)
-- expression 42 operands: lhs = Counter(17), rhs = Counter(12)
-- expression 43 operands: lhs = Counter(17), rhs = Counter(12)
-- expression 44 operands: lhs = Expression(45, Sub), rhs = Zero
-- expression 45 operands: lhs = Expression(46, Sub), rhs = Counter(13)
-- expression 46 operands: lhs = Counter(17), rhs = Counter(12)
-- expression 47 operands: lhs = Expression(52, Sub), rhs = Counter(15)
-- expression 48 operands: lhs = Counter(19), rhs = Counter(14)
-- expression 49 operands: lhs = Counter(19), rhs = Counter(14)
-- expression 50 operands: lhs = Expression(51, Sub), rhs = Zero
-- expression 51 operands: lhs = Expression(52, Sub), rhs = Counter(15)
-- expression 52 operands: lhs = Counter(19), rhs = Counter(14)
-- expression 53 operands: lhs = Expression(54, Add), rhs = Counter(3)
-- expression 54 operands: lhs = Counter(4), rhs = Expression(55, Add)
-- expression 55 operands: lhs = Expression(56, Add), rhs = Expression(60, Add)
-- expression 56 operands: lhs = Counter(5), rhs = Expression(57, Add)
-- expression 57 operands: lhs = Expression(58, Add), rhs = Expression(59, Add)
-- expression 58 operands: lhs = Counter(6), rhs = Counter(7)
-- expression 59 operands: lhs = Counter(8), rhs = Counter(9)
-- expression 60 operands: lhs = Expression(61, Add), rhs = Expression(62, Add)
-- expression 61 operands: lhs = Counter(10), rhs = Counter(11)
-- expression 62 operands: lhs = Expression(63, Add), rhs = Expression(64, Add)
-- expression 63 operands: lhs = Counter(12), rhs = Counter(13)
-- expression 64 operands: lhs = Counter(14), rhs = Counter(15)
+- expression 33 operands: lhs = Expression(34, Sub), rhs = Counter(11)
+- expression 34 operands: lhs = Expression(35, Sub), rhs = Counter(10)
+- expression 35 operands: lhs = Expression(36, Sub), rhs = Counter(16)
+- expression 36 operands: lhs = Expression(0, Add), rhs = Counter(3)
+- expression 37 operands: lhs = Expression(41, Sub), rhs = Counter(13)
+- expression 38 operands: lhs = Counter(17), rhs = Counter(12)
+- expression 39 operands: lhs = Counter(17), rhs = Counter(12)
+- expression 40 operands: lhs = Expression(41, Sub), rhs = Counter(13)
+- expression 41 operands: lhs = Counter(17), rhs = Counter(12)
+- expression 42 operands: lhs = Expression(46, Sub), rhs = Counter(15)
+- expression 43 operands: lhs = Counter(19), rhs = Counter(14)
+- expression 44 operands: lhs = Counter(19), rhs = Counter(14)
+- expression 45 operands: lhs = Expression(46, Sub), rhs = Counter(15)
+- expression 46 operands: lhs = Counter(19), rhs = Counter(14)
+- expression 47 operands: lhs = Expression(48, Add), rhs = Counter(3)
+- expression 48 operands: lhs = Counter(4), rhs = Expression(49, Add)
+- expression 49 operands: lhs = Expression(50, Add), rhs = Expression(54, Add)
+- expression 50 operands: lhs = Counter(5), rhs = Expression(51, Add)
+- expression 51 operands: lhs = Expression(52, Add), rhs = Expression(53, Add)
+- expression 52 operands: lhs = Counter(6), rhs = Counter(7)
+- expression 53 operands: lhs = Counter(8), rhs = Counter(9)
+- expression 54 operands: lhs = Expression(55, Add), rhs = Expression(56, Add)
+- expression 55 operands: lhs = Counter(10), rhs = Counter(11)
+- expression 56 operands: lhs = Expression(57, Add), rhs = Expression(58, Add)
+- expression 57 operands: lhs = Counter(12), rhs = Counter(13)
+- expression 58 operands: lhs = Counter(14), rhs = Counter(15)
 Number of file 0 mappings: 40
 - Code(Counter(0)) at (prev + 60, 1) to (start + 3, 23)
 - Code(Expression(0, Add)) at (prev + 8, 9) to (start + 0, 14)
     = (c0 + (c1 + c2))
-- Code(Expression(40, Sub)) at (prev + 2, 9) to (start + 4, 26)
+- Code(Expression(36, Sub)) at (prev + 2, 9) to (start + 4, 26)
     = ((c0 + (c1 + c2)) - c3)
 - Code(Counter(16)) at (prev + 6, 13) to (start + 0, 47)
 - Code(Counter(4)) at (prev + 0, 47) to (start + 0, 48)
-- Code(Expression(20, Sub)) at (prev + 0, 49) to (start + 3, 53)
+- Code(Expression(18, Sub)) at (prev + 0, 49) to (start + 3, 53)
     = (c16 - c4)
 - Code(Counter(5)) at (prev + 4, 17) to (start + 0, 18)
-- Code(Expression(19, Sub)) at (prev + 2, 17) to (start + 4, 18)
+- Code(Expression(17, Sub)) at (prev + 2, 17) to (start + 4, 18)
     = ((c16 - c4) - c5)
-- Code(Expression(17, Sub)) at (prev + 5, 17) to (start + 0, 20)
+- Code(Expression(15, Sub)) at (prev + 5, 17) to (start + 0, 20)
     = ((((c16 - c4) - c5) - c6) - c7)
-- Code(Expression(10, Add)) at (prev + 0, 23) to (start + 0, 65)
-    = (((c16 - c4) - c5) + Zero)
+- Code(Expression(17, Sub)) at (prev + 0, 23) to (start + 0, 65)
+    = ((c16 - c4) - c5)
 - Code(Counter(6)) at (prev + 0, 65) to (start + 0, 66)
-- Code(Expression(18, Sub)) at (prev + 0, 67) to (start + 0, 95)
+- Code(Expression(16, Sub)) at (prev + 0, 67) to (start + 0, 95)
     = (((c16 - c4) - c5) - c6)
 - Code(Counter(7)) at (prev + 0, 95) to (start + 0, 96)
-- Code(Expression(16, Add)) at (prev + 1, 13) to (start + 0, 32)
-    = (((((c16 - c4) - c5) - c6) - c7) + Zero)
-- Code(Expression(25, Sub)) at (prev + 1, 17) to (start + 0, 20)
+- Code(Expression(15, Sub)) at (prev + 1, 13) to (start + 0, 32)
+    = ((((c16 - c4) - c5) - c6) - c7)
+- Code(Expression(22, Sub)) at (prev + 1, 17) to (start + 0, 20)
     = ((c18 - c8) - c9)
 - Code(Counter(18)) at (prev + 0, 23) to (start + 0, 65)
 - Code(Counter(8)) at (prev + 0, 65) to (start + 0, 66)
-- Code(Expression(26, Sub)) at (prev + 0, 67) to (start + 0, 96)
+- Code(Expression(23, Sub)) at (prev + 0, 67) to (start + 0, 96)
     = (c18 - c8)
 - Code(Counter(9)) at (prev + 0, 96) to (start + 0, 97)
-- Code(Expression(24, Add)) at (prev + 1, 13) to (start + 0, 32)
-    = (((c18 - c8) - c9) + Zero)
-- Code(Expression(37, Sub)) at (prev + 4, 17) to (start + 0, 20)
+- Code(Expression(22, Sub)) at (prev + 1, 13) to (start + 0, 32)
+    = ((c18 - c8) - c9)
+- Code(Expression(33, Sub)) at (prev + 4, 17) to (start + 0, 20)
     = (((((c0 + (c1 + c2)) - c3) - c16) - c10) - c11)
-- Code(Expression(39, Sub)) at (prev + 0, 23) to (start + 0, 66)
+- Code(Expression(35, Sub)) at (prev + 0, 23) to (start + 0, 66)
     = (((c0 + (c1 + c2)) - c3) - c16)
 - Code(Counter(10)) at (prev + 0, 66) to (start + 0, 67)
-- Code(Expression(38, Sub)) at (prev + 0, 68) to (start + 0, 97)
+- Code(Expression(34, Sub)) at (prev + 0, 68) to (start + 0, 97)
     = ((((c0 + (c1 + c2)) - c3) - c16) - c10)
 - Code(Counter(11)) at (prev + 0, 97) to (start + 0, 98)
-- Code(Expression(36, Add)) at (prev + 1, 13) to (start + 0, 32)
-    = ((((((c0 + (c1 + c2)) - c3) - c16) - c10) - c11) + Zero)
-- Code(Expression(45, Sub)) at (prev + 1, 17) to (start + 0, 20)
+- Code(Expression(33, Sub)) at (prev + 1, 13) to (start + 0, 32)
+    = (((((c0 + (c1 + c2)) - c3) - c16) - c10) - c11)
+- Code(Expression(40, Sub)) at (prev + 1, 17) to (start + 0, 20)
     = ((c17 - c12) - c13)
 - Code(Counter(17)) at (prev + 0, 23) to (start + 1, 54)
 - Code(Counter(12)) at (prev + 1, 54) to (start + 0, 55)
-- Code(Expression(46, Sub)) at (prev + 1, 18) to (start + 0, 47)
+- Code(Expression(41, Sub)) at (prev + 1, 18) to (start + 0, 47)
     = (c17 - c12)
 - Code(Counter(13)) at (prev + 0, 47) to (start + 0, 48)
-- Code(Expression(44, Add)) at (prev + 1, 13) to (start + 0, 32)
-    = (((c17 - c12) - c13) + Zero)
-- Code(Expression(51, Sub)) at (prev + 1, 17) to (start + 0, 20)
+- Code(Expression(40, Sub)) at (prev + 1, 13) to (start + 0, 32)
+    = ((c17 - c12) - c13)
+- Code(Expression(45, Sub)) at (prev + 1, 17) to (start + 0, 20)
     = ((c19 - c14) - c15)
 - Code(Counter(19)) at (prev + 0, 23) to (start + 1, 54)
 - Code(Counter(14)) at (prev + 2, 17) to (start + 0, 18)
-- Code(Expression(52, Sub)) at (prev + 1, 18) to (start + 0, 47)
+- Code(Expression(46, Sub)) at (prev + 1, 18) to (start + 0, 47)
     = (c19 - c14)
 - Code(Counter(15)) at (prev + 1, 17) to (start + 0, 18)
-- Code(Expression(50, Add)) at (prev + 2, 13) to (start + 0, 32)
-    = (((c19 - c14) - c15) + Zero)
+- Code(Expression(45, Sub)) at (prev + 2, 13) to (start + 0, 32)
+    = ((c19 - c14) - c15)
 - Code(Counter(3)) at (prev + 3, 5) to (start + 0, 11)
-- Code(Expression(53, Add)) at (prev + 1, 1) to (start + 0, 2)
+- Code(Expression(47, Add)) at (prev + 1, 1) to (start + 0, 2)
     = ((c4 + ((c5 + ((c6 + c7) + (c8 + c9))) + ((c10 + c11) + ((c12 + c13) + (c14 + c15))))) + c3)
 
diff --git a/tests/coverage-map/status-quo/unused.cov-map b/tests/coverage-map/status-quo/unused.cov-map
index c8b8f195fbd..9383d1e90ac 100644
--- a/tests/coverage-map/status-quo/unused.cov-map
+++ b/tests/coverage-map/status-quo/unused.cov-map
@@ -47,45 +47,45 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 37, 1) to (start + 4, 2)
 
 Function name: unused::unused_func (unused)
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 13, 01, 01, 0e, 00, 01, 0f, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 00, 13, 01, 01, 0e, 00, 01, 0f, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 19, 1) to (start + 1, 14)
+- Code(Zero) at (prev + 19, 1) to (start + 1, 14)
 - Code(Zero) at (prev + 1, 15) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
 - Code(Zero) at (prev + 1, 1) to (start + 0, 2)
 
 Function name: unused::unused_func2 (unused)
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 19, 01, 01, 0e, 00, 01, 0f, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 00, 19, 01, 01, 0e, 00, 01, 0f, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 25, 1) to (start + 1, 14)
+- Code(Zero) at (prev + 25, 1) to (start + 1, 14)
 - Code(Zero) at (prev + 1, 15) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
 - Code(Zero) at (prev + 1, 1) to (start + 0, 2)
 
 Function name: unused::unused_func3 (unused)
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 1f, 01, 01, 0e, 00, 01, 0f, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 00, 1f, 01, 01, 0e, 00, 01, 0f, 02, 06, 00, 02, 06, 00, 07, 00, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 31, 1) to (start + 1, 14)
+- Code(Zero) at (prev + 31, 1) to (start + 1, 14)
 - Code(Zero) at (prev + 1, 15) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 6) to (start + 0, 7)
 - Code(Zero) at (prev + 1, 1) to (start + 0, 2)
 
 Function name: unused::unused_template_func::<_> (unused)
-Raw bytes (34): 0x[01, 01, 00, 06, 01, 0b, 01, 01, 12, 00, 02, 0b, 00, 11, 00, 01, 09, 00, 0f, 00, 00, 13, 00, 19, 00, 01, 09, 00, 0f, 00, 02, 01, 00, 02]
+Raw bytes (34): 0x[01, 01, 00, 06, 00, 0b, 01, 01, 12, 00, 02, 0b, 00, 11, 00, 01, 09, 00, 0f, 00, 00, 13, 00, 19, 00, 01, 09, 00, 0f, 00, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 6
-- Code(Counter(0)) at (prev + 11, 1) to (start + 1, 18)
+- Code(Zero) at (prev + 11, 1) to (start + 1, 18)
 - Code(Zero) at (prev + 2, 11) to (start + 0, 17)
 - Code(Zero) at (prev + 1, 9) to (start + 0, 15)
 - Code(Zero) at (prev + 0, 19) to (start + 0, 25)
diff --git a/tests/coverage-map/status-quo/yield.cov-map b/tests/coverage-map/status-quo/yield.cov-map
index 16caa2db343..c9c9709fa4f 100644
--- a/tests/coverage-map/status-quo/yield.cov-map
+++ b/tests/coverage-map/status-quo/yield.cov-map
@@ -1,54 +1,44 @@
 Function name: yield::main
-Raw bytes (118): 0x[01, 01, 11, 01, 00, 05, 09, 0d, 00, 0d, 11, 32, 15, 0d, 11, 11, 15, 2e, 00, 32, 15, 0d, 11, 2e, 00, 32, 15, 0d, 11, 19, 1d, 21, 00, 25, 29, 2d, 00, 10, 01, 07, 01, 01, 16, 03, 06, 0b, 00, 2e, 0d, 01, 27, 00, 29, 07, 01, 0e, 00, 34, 0b, 02, 0b, 00, 2e, 32, 01, 22, 00, 27, 2e, 00, 2c, 00, 2e, 1b, 01, 0e, 00, 34, 1f, 03, 09, 00, 16, 2b, 07, 0b, 00, 2e, 21, 01, 27, 00, 29, 37, 01, 0e, 00, 34, 3b, 02, 0b, 00, 2e, 2d, 01, 27, 00, 29, 3f, 01, 0e, 00, 34, 43, 02, 01, 00, 02]
+Raw bytes (106): 0x[01, 01, 0b, 05, 09, 0d, 11, 22, 15, 0d, 11, 11, 15, 22, 15, 0d, 11, 22, 15, 0d, 11, 19, 1d, 25, 29, 10, 01, 07, 01, 01, 16, 01, 06, 0b, 00, 2e, 0d, 01, 27, 00, 29, 03, 01, 0e, 00, 34, 0d, 02, 0b, 00, 2e, 22, 01, 22, 00, 27, 1e, 00, 2c, 00, 2e, 13, 01, 0e, 00, 34, 1e, 03, 09, 00, 16, 1e, 07, 0b, 00, 2e, 21, 01, 27, 00, 29, 27, 01, 0e, 00, 34, 21, 02, 0b, 00, 2e, 2d, 01, 27, 00, 29, 2b, 01, 0e, 00, 34, 2d, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 17
-- expression 0 operands: lhs = Counter(0), rhs = Zero
-- expression 1 operands: lhs = Counter(1), rhs = Counter(2)
-- expression 2 operands: lhs = Counter(3), rhs = Zero
+Number of expressions: 11
+- expression 0 operands: lhs = Counter(1), rhs = Counter(2)
+- expression 1 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 2 operands: lhs = Expression(8, Sub), rhs = Counter(5)
 - expression 3 operands: lhs = Counter(3), rhs = Counter(4)
-- expression 4 operands: lhs = Expression(12, Sub), rhs = Counter(5)
-- expression 5 operands: lhs = Counter(3), rhs = Counter(4)
-- expression 6 operands: lhs = Counter(4), rhs = Counter(5)
-- expression 7 operands: lhs = Expression(11, Sub), rhs = Zero
-- expression 8 operands: lhs = Expression(12, Sub), rhs = Counter(5)
-- expression 9 operands: lhs = Counter(3), rhs = Counter(4)
-- expression 10 operands: lhs = Expression(11, Sub), rhs = Zero
-- expression 11 operands: lhs = Expression(12, Sub), rhs = Counter(5)
-- expression 12 operands: lhs = Counter(3), rhs = Counter(4)
-- expression 13 operands: lhs = Counter(6), rhs = Counter(7)
-- expression 14 operands: lhs = Counter(8), rhs = Zero
-- expression 15 operands: lhs = Counter(9), rhs = Counter(10)
-- expression 16 operands: lhs = Counter(11), rhs = Zero
+- expression 4 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 5 operands: lhs = Expression(8, Sub), rhs = Counter(5)
+- expression 6 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 7 operands: lhs = Expression(8, Sub), rhs = Counter(5)
+- expression 8 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 9 operands: lhs = Counter(6), rhs = Counter(7)
+- expression 10 operands: lhs = Counter(9), rhs = Counter(10)
 Number of file 0 mappings: 16
 - Code(Counter(0)) at (prev + 7, 1) to (start + 1, 22)
-- Code(Expression(0, Add)) at (prev + 6, 11) to (start + 0, 46)
-    = (c0 + Zero)
+- Code(Counter(0)) at (prev + 6, 11) to (start + 0, 46)
 - Code(Counter(3)) at (prev + 1, 39) to (start + 0, 41)
-- Code(Expression(1, Add)) at (prev + 1, 14) to (start + 0, 52)
+- Code(Expression(0, Add)) at (prev + 1, 14) to (start + 0, 52)
     = (c1 + c2)
-- Code(Expression(2, Add)) at (prev + 2, 11) to (start + 0, 46)
-    = (c3 + Zero)
-- Code(Expression(12, Sub)) at (prev + 1, 34) to (start + 0, 39)
+- Code(Counter(3)) at (prev + 2, 11) to (start + 0, 46)
+- Code(Expression(8, Sub)) at (prev + 1, 34) to (start + 0, 39)
     = (c3 - c4)
-- Code(Expression(11, Sub)) at (prev + 0, 44) to (start + 0, 46)
+- Code(Expression(7, Sub)) at (prev + 0, 44) to (start + 0, 46)
     = ((c3 - c4) - c5)
-- Code(Expression(6, Add)) at (prev + 1, 14) to (start + 0, 52)
+- Code(Expression(4, Add)) at (prev + 1, 14) to (start + 0, 52)
     = (c4 + c5)
-- Code(Expression(7, Add)) at (prev + 3, 9) to (start + 0, 22)
-    = (((c3 - c4) - c5) + Zero)
-- Code(Expression(10, Add)) at (prev + 7, 11) to (start + 0, 46)
-    = (((c3 - c4) - c5) + Zero)
+- Code(Expression(7, Sub)) at (prev + 3, 9) to (start + 0, 22)
+    = ((c3 - c4) - c5)
+- Code(Expression(7, Sub)) at (prev + 7, 11) to (start + 0, 46)
+    = ((c3 - c4) - c5)
 - Code(Counter(8)) at (prev + 1, 39) to (start + 0, 41)
-- Code(Expression(13, Add)) at (prev + 1, 14) to (start + 0, 52)
+- Code(Expression(9, Add)) at (prev + 1, 14) to (start + 0, 52)
     = (c6 + c7)
-- Code(Expression(14, Add)) at (prev + 2, 11) to (start + 0, 46)
-    = (c8 + Zero)
+- Code(Counter(8)) at (prev + 2, 11) to (start + 0, 46)
 - Code(Counter(11)) at (prev + 1, 39) to (start + 0, 41)
-- Code(Expression(15, Add)) at (prev + 1, 14) to (start + 0, 52)
+- Code(Expression(10, Add)) at (prev + 1, 14) to (start + 0, 52)
     = (c9 + c10)
-- Code(Expression(16, Add)) at (prev + 2, 1) to (start + 0, 2)
-    = (c11 + Zero)
+- Code(Counter(11)) at (prev + 2, 1) to (start + 0, 2)
 
 Function name: yield::main::{closure#0}
 Raw bytes (14): 0x[01, 01, 00, 02, 01, 08, 1c, 01, 10, 05, 02, 10, 01, 06]
diff --git a/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-abort.diff b/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-abort.diff
index 7ba51ccdbf6..d585ae89e82 100644
--- a/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-abort.diff
+++ b/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-abort.diff
@@ -20,6 +20,7 @@
           _2 = const u8::MAX;
           StorageLive(_3);
           _3 = const 1_u8;
+          StorageLive(_4);
 -         _4 = CheckedAdd(_2, _3);
 -         assert(!move (_4.1: bool), "attempt to compute `{} + {}`, which would overflow", _2, _3) -> [success: bb1, unwind unreachable];
 +         _4 = const (0_u8, true);
@@ -29,6 +30,7 @@
       bb1: {
 -         _1 = move (_4.0: u8);
 +         _1 = const 0_u8;
+          StorageDead(_4);
           StorageDead(_3);
           StorageDead(_2);
           StorageDead(_1);
diff --git a/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-unwind.diff b/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-unwind.diff
index 545b7f22f6e..9fe39090638 100644
--- a/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-unwind.diff
+++ b/tests/mir-opt/const_prop/inherit_overflow.main.ConstProp.panic-unwind.diff
@@ -20,6 +20,7 @@
           _2 = const u8::MAX;
           StorageLive(_3);
           _3 = const 1_u8;
+          StorageLive(_4);
 -         _4 = CheckedAdd(_2, _3);
 -         assert(!move (_4.1: bool), "attempt to compute `{} + {}`, which would overflow", _2, _3) -> [success: bb1, unwind continue];
 +         _4 = const (0_u8, true);
@@ -29,6 +30,7 @@
       bb1: {
 -         _1 = move (_4.0: u8);
 +         _1 = const 0_u8;
+          StorageDead(_4);
           StorageDead(_3);
           StorageDead(_2);
           StorageDead(_1);
diff --git a/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-abort.diff b/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-abort.diff
index 9a68d3b51b5..87bb1454c96 100644
--- a/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-abort.diff
+++ b/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-abort.diff
@@ -20,6 +20,7 @@
           _2 = const u8::MAX;
           StorageLive(_3);
           _3 = const 1_u8;
+          StorageLive(_4);
 -         _4 = CheckedAdd(_2, _3);
 -         assert(!move (_4.1: bool), "attempt to compute `{} + {}`, which would overflow", _2, _3) -> [success: bb1, unwind unreachable];
 +         _4 = CheckedAdd(const u8::MAX, const 1_u8);
@@ -29,6 +30,7 @@
       bb1: {
 -         _1 = move (_4.0: u8);
 +         _1 = const 0_u8;
+          StorageDead(_4);
           StorageDead(_3);
           StorageDead(_2);
           StorageDead(_1);
diff --git a/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-unwind.diff b/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-unwind.diff
index c1d281ab788..b2f13640a4c 100644
--- a/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-unwind.diff
+++ b/tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.panic-unwind.diff
@@ -20,6 +20,7 @@
           _2 = const u8::MAX;
           StorageLive(_3);
           _3 = const 1_u8;
+          StorageLive(_4);
 -         _4 = CheckedAdd(_2, _3);
 -         assert(!move (_4.1: bool), "attempt to compute `{} + {}`, which would overflow", _2, _3) -> [success: bb1, unwind continue];
 +         _4 = CheckedAdd(const u8::MAX, const 1_u8);
@@ -29,6 +30,7 @@
       bb1: {
 -         _1 = move (_4.0: u8);
 +         _1 = const 0_u8;
+          StorageDead(_4);
           StorageDead(_3);
           StorageDead(_2);
           StorageDead(_1);
diff --git a/tests/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir b/tests/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir
index 721fac27d88..10b81e59b5f 100644
--- a/tests/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir
+++ b/tests/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir
@@ -41,6 +41,8 @@ fn foo(_1: T, _2: i32) -> (i32, T) {
         _7 = (move _8,);
         StorageLive(_9);
         _9 = move (_7.0: i32);
+        StorageLive(_10);
+        StorageLive(_12);
         StorageLive(_11);
         _10 = ((*_6).0: &i32);
         _11 = (*_10);
@@ -50,6 +52,8 @@ fn foo(_1: T, _2: i32) -> (i32, T) {
         _0 = (move _11, move _13);
         StorageDead(_13);
         StorageDead(_11);
+        StorageDead(_12);
+        StorageDead(_10);
         StorageDead(_9);
         StorageDead(_8);
         StorageDead(_7);
diff --git a/tests/mir-opt/inline/inline_generator.main.Inline.panic-abort.diff b/tests/mir-opt/inline/inline_generator.main.Inline.panic-abort.diff
index 6779003b693..06ee8c464d5 100644
--- a/tests/mir-opt/inline/inline_generator.main.Inline.panic-abort.diff
+++ b/tests/mir-opt/inline/inline_generator.main.Inline.panic-abort.diff
@@ -40,6 +40,8 @@
 +         StorageDead(_3);
 +         StorageLive(_5);
 +         _5 = const false;
++         StorageLive(_6);
++         StorageLive(_7);
 +         _6 = (_2.0: &mut {generator@$DIR/inline_generator.rs:16:5: 16:8});
 +         _7 = discriminant((*_6));
 +         switchInt(move _7) -> [0: bb3, 1: bb7, 3: bb8, otherwise: bb9];
@@ -48,6 +50,8 @@
       bb1: {
 -         _3 = &mut _4;
 -         _2 = Pin::<&mut {generator@$DIR/inline_generator.rs:16:5: 16:8}>::new(move _3) -> [return: bb2, unwind unreachable];
++         StorageDead(_7);
++         StorageDead(_6);
 +         StorageDead(_5);
 +         StorageDead(_2);
 +         drop(_4) -> [return: bb2, unwind unreachable];
diff --git a/tests/mir-opt/inline/inline_generator.main.Inline.panic-unwind.diff b/tests/mir-opt/inline/inline_generator.main.Inline.panic-unwind.diff
index 31744be99ec..da29ba5f50d 100644
--- a/tests/mir-opt/inline/inline_generator.main.Inline.panic-unwind.diff
+++ b/tests/mir-opt/inline/inline_generator.main.Inline.panic-unwind.diff
@@ -48,6 +48,8 @@
 -         _1 = <{generator@$DIR/inline_generator.rs:16:5: 16:8} as Generator<bool>>::resume(move _2, const false) -> [return: bb3, unwind: bb5];
 +         StorageLive(_5);
 +         _5 = const false;
++         StorageLive(_6);
++         StorageLive(_7);
 +         _6 = (_2.0: &mut {generator@$DIR/inline_generator.rs:16:5: 16:8});
 +         _7 = discriminant((*_6));
 +         switchInt(move _7) -> [0: bb5, 1: bb9, 3: bb10, otherwise: bb11];
@@ -55,6 +57,8 @@
   
 -     bb3: {
 +     bb1: {
++         StorageDead(_7);
++         StorageDead(_6);
 +         StorageDead(_5);
           StorageDead(_2);
 -         drop(_4) -> [return: bb4, unwind: bb6];
diff --git a/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-abort.diff b/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-abort.diff
index dc0ab255afd..b90e0505c54 100644
--- a/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-abort.diff
+++ b/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-abort.diff
@@ -122,9 +122,14 @@
 +         _3 = const _;
 +         _2 = Vec::<u32> { buf: move _3, len: const 0_usize };
 +         StorageDead(_3);
++         StorageLive(_4);
++         StorageLive(_5);
++         StorageLive(_6);
++         StorageLive(_7);
 +         _4 = SizeOf(std::vec::Vec<u32>);
 +         _5 = AlignOf(std::vec::Vec<u32>);
 +         StorageLive(_8);
++         StorageLive(_10);
 +         StorageLive(_11);
 +         StorageLive(_12);
 +         StorageLive(_13);
@@ -178,10 +183,15 @@
 +         StorageDead(_13);
 +         StorageDead(_12);
 +         StorageDead(_11);
++         StorageDead(_10);
 +         StorageDead(_8);
 +         _1 = ShallowInitBox(move _6, std::vec::Vec<u32>);
 +         _7 = (((_1.0: std::ptr::Unique<std::vec::Vec<u32>>).0: std::ptr::NonNull<std::vec::Vec<u32>>).0: *const std::vec::Vec<u32>);
 +         (*_7) = move _2;
++         StorageDead(_7);
++         StorageDead(_6);
++         StorageDead(_5);
++         StorageDead(_4);
           StorageDead(_2);
           _0 = const ();
 -         drop(_1) -> [return: bb3, unwind unreachable];
diff --git a/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-unwind.diff b/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-unwind.diff
index 675292f06d6..f9c637caa18 100644
--- a/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-unwind.diff
+++ b/tests/mir-opt/inline/inline_into_box_place.main.Inline.panic-unwind.diff
@@ -122,9 +122,14 @@
 +         _3 = const _;
 +         _2 = Vec::<u32> { buf: move _3, len: const 0_usize };
 +         StorageDead(_3);
++         StorageLive(_4);
++         StorageLive(_5);
++         StorageLive(_6);
++         StorageLive(_7);
 +         _4 = SizeOf(std::vec::Vec<u32>);
 +         _5 = AlignOf(std::vec::Vec<u32>);
 +         StorageLive(_8);
++         StorageLive(_10);
 +         StorageLive(_11);
 +         StorageLive(_12);
 +         StorageLive(_13);
@@ -195,10 +200,15 @@
 +         StorageDead(_13);
 +         StorageDead(_12);
 +         StorageDead(_11);
++         StorageDead(_10);
 +         StorageDead(_8);
 +         _1 = ShallowInitBox(move _6, std::vec::Vec<u32>);
 +         _7 = (((_1.0: std::ptr::Unique<std::vec::Vec<u32>>).0: std::ptr::NonNull<std::vec::Vec<u32>>).0: *const std::vec::Vec<u32>);
 +         (*_7) = move _2;
++         StorageDead(_7);
++         StorageDead(_6);
++         StorageDead(_5);
++         StorageDead(_4);
 +         StorageDead(_2);
 +         _0 = const ();
 +         drop(_1) -> [return: bb1, unwind: bb2];
diff --git a/tests/mir-opt/inline/issue_106141.outer.Inline.panic-abort.diff b/tests/mir-opt/inline/issue_106141.outer.Inline.panic-abort.diff
index 3d0c1072527..688ab9c563a 100644
--- a/tests/mir-opt/inline/issue_106141.outer.Inline.panic-abort.diff
+++ b/tests/mir-opt/inline/issue_106141.outer.Inline.panic-abort.diff
@@ -18,6 +18,7 @@
       bb0: {
 -         _0 = inner() -> [return: bb1, unwind unreachable];
 +         StorageLive(_1);
++         StorageLive(_2);
 +         _1 = const _;
 +         _0 = index() -> [return: bb1, unwind unreachable];
       }
@@ -40,6 +41,7 @@
 + 
 +     bb4: {
 +         StorageDead(_3);
++         StorageDead(_2);
 +         StorageDead(_1);
           return;
       }
diff --git a/tests/mir-opt/inline/issue_106141.outer.Inline.panic-unwind.diff b/tests/mir-opt/inline/issue_106141.outer.Inline.panic-unwind.diff
index 16a19f4a356..e4d2b1a7ffb 100644
--- a/tests/mir-opt/inline/issue_106141.outer.Inline.panic-unwind.diff
+++ b/tests/mir-opt/inline/issue_106141.outer.Inline.panic-unwind.diff
@@ -18,6 +18,7 @@
       bb0: {
 -         _0 = inner() -> [return: bb1, unwind continue];
 +         StorageLive(_1);
++         StorageLive(_2);
 +         _1 = const _;
 +         _0 = index() -> [return: bb1, unwind continue];
       }
@@ -40,6 +41,7 @@
 + 
 +     bb4: {
 +         StorageDead(_3);
++         StorageDead(_2);
 +         StorageDead(_1);
           return;
       }
diff --git a/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.b.Inline.after.mir b/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.b.Inline.after.mir
index 6837da27a96..62d7e839f5a 100644
--- a/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.b.Inline.after.mir
+++ b/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.b.Inline.after.mir
@@ -17,9 +17,13 @@ fn b(_1: &mut Box<T>) -> &mut T {
         StorageLive(_3);
         StorageLive(_4);
         _4 = &mut (*_1);
+        StorageLive(_5);
+        StorageLive(_6);
         _5 = deref_copy (*_4);
         _6 = (((_5.0: std::ptr::Unique<T>).0: std::ptr::NonNull<T>).0: *const T);
         _3 = &mut (*_6);
+        StorageDead(_6);
+        StorageDead(_5);
         _2 = &mut (*_3);
         StorageDead(_4);
         _0 = &mut (*_2);
diff --git a/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.d.Inline.after.mir b/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.d.Inline.after.mir
index d09bfc33ff1..bc0aa06a752 100644
--- a/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.d.Inline.after.mir
+++ b/tests/mir-opt/inline/issue_58867_inline_as_ref_as_mut.d.Inline.after.mir
@@ -15,9 +15,13 @@ fn d(_1: &Box<T>) -> &T {
         StorageLive(_2);
         StorageLive(_3);
         _3 = &(*_1);
+        StorageLive(_4);
+        StorageLive(_5);
         _4 = deref_copy (*_3);
         _5 = (((_4.0: std::ptr::Unique<T>).0: std::ptr::NonNull<T>).0: *const T);
         _2 = &(*_5);
+        StorageDead(_5);
+        StorageDead(_4);
         _0 = &(*_2);
         StorageDead(_3);
         StorageDead(_2);
diff --git a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-abort.diff b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-abort.diff
index e3c57347392..018b6c1ee95 100644
--- a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-abort.diff
+++ b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-abort.diff
@@ -30,6 +30,7 @@
           _2 = move _1;
 -         _0 = Option::<T>::unwrap_unchecked(move _2) -> [return: bb1, unwind unreachable];
 +         StorageLive(_3);
++         StorageLive(_4);
 +         _4 = discriminant(_2);
 +         switchInt(move _4) -> [1: bb2, otherwise: bb1];
       }
@@ -40,6 +41,7 @@
 + 
 +     bb2: {
 +         _0 = move ((_2 as Some).0: T);
++         StorageDead(_4);
 +         StorageDead(_3);
           StorageDead(_2);
           return;
diff --git a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-unwind.diff b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-unwind.diff
index fc638cb3ace..47845758a3f 100644
--- a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-unwind.diff
+++ b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.Inline.panic-unwind.diff
@@ -30,6 +30,7 @@
           _2 = move _1;
 -         _0 = Option::<T>::unwrap_unchecked(move _2) -> [return: bb1, unwind: bb2];
 +         StorageLive(_3);
++         StorageLive(_4);
 +         _4 = discriminant(_2);
 +         switchInt(move _4) -> [1: bb2, otherwise: bb1];
       }
@@ -44,6 +45,7 @@
 -         resume;
 +     bb2: {
 +         _0 = move ((_2 as Some).0: T);
++         StorageDead(_4);
 +         StorageDead(_3);
 +         StorageDead(_2);
 +         return;
diff --git a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-abort.mir b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-abort.mir
index fcc4d43ced6..392f085bd4d 100644
--- a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-abort.mir
+++ b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-abort.mir
@@ -25,12 +25,14 @@ fn unwrap_unchecked(_1: Option<T>) -> T {
 
     bb0: {
         StorageLive(_3);
+        StorageLive(_2);
         _2 = discriminant(_1);
         switchInt(move _2) -> [1: bb1, otherwise: bb2];
     }
 
     bb1: {
         _0 = move ((_1 as Some).0: T);
+        StorageDead(_2);
         StorageDead(_3);
         return;
     }
diff --git a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-unwind.mir
index fcc4d43ced6..392f085bd4d 100644
--- a/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-unwind.mir
+++ b/tests/mir-opt/inline/unwrap_unchecked.unwrap_unchecked.PreCodegen.after.panic-unwind.mir
@@ -25,12 +25,14 @@ fn unwrap_unchecked(_1: Option<T>) -> T {
 
     bb0: {
         StorageLive(_3);
+        StorageLive(_2);
         _2 = discriminant(_1);
         switchInt(move _2) -> [1: bb1, otherwise: bb2];
     }
 
     bb1: {
         _0 = move ((_1 as Some).0: T);
+        StorageDead(_2);
         StorageDead(_3);
         return;
     }
diff --git a/tests/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff b/tests/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff
index afcfde09c02..28a7ffda371 100644
--- a/tests/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff
+++ b/tests/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff
@@ -5,7 +5,7 @@
       let mut _0: bool;
   
       bb0: {
-+         Coverage::Counter(0) for /the/src/instrument_coverage.rs:20:1 - 22:2;
++         Coverage::Counter(0) for [/the/src/instrument_coverage.rs:20:1 - 22:2];
           _0 = const true;
           return;
       }
diff --git a/tests/mir-opt/instrument_coverage.main.InstrumentCoverage.diff b/tests/mir-opt/instrument_coverage.main.InstrumentCoverage.diff
index e17c6ddc56e..9a8caa26307 100644
--- a/tests/mir-opt/instrument_coverage.main.InstrumentCoverage.diff
+++ b/tests/mir-opt/instrument_coverage.main.InstrumentCoverage.diff
@@ -8,12 +8,12 @@
       let mut _3: !;
   
       bb0: {
-+         Coverage::Counter(0) for /the/src/instrument_coverage.rs:11:1 - 11:11;
++         Coverage::Counter(0) for [/the/src/instrument_coverage.rs:11:1 - 11:11];
           goto -> bb1;
       }
   
       bb1: {
-+         Coverage::Expression(0) = Counter(0) + Counter(1) for /the/src/instrument_coverage.rs:12:5 - 13:17;
++         Coverage::Expression(0) = Counter(0) + Counter(1) for [/the/src/instrument_coverage.rs:12:5 - 13:17];
           falseUnwind -> [real: bb2, unwind: bb6];
       }
   
@@ -27,15 +27,14 @@
       }
   
       bb4: {
-+         Coverage::Expression(2) = Expression(1) + Zero for /the/src/instrument_coverage.rs:17:1 - 17:2;
-+         Coverage::Expression(1) = Expression(0) - Counter(1) for /the/src/instrument_coverage.rs:14:13 - 14:18;
++         Coverage::Expression(1) = Expression(0) - Counter(1) for [/the/src/instrument_coverage.rs:14:13 - 14:18, /the/src/instrument_coverage.rs:17:1 - 17:2];
           _0 = const ();
           StorageDead(_2);
           return;
       }
   
       bb5: {
-+         Coverage::Counter(1) for /the/src/instrument_coverage.rs:15:10 - 15:11;
++         Coverage::Counter(1) for [/the/src/instrument_coverage.rs:15:10 - 15:11];
           _1 = const ();
           StorageDead(_2);
           goto -> bb1;
diff --git a/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-abort.mir b/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-abort.mir
index f8c85941813..55ccf6a8b45 100644
--- a/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-abort.mir
+++ b/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-abort.mir
@@ -30,6 +30,7 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb1: {
+        StorageLive(_3);
         _3 = discriminant(_2);
         StorageDead(_7);
         StorageDead(_2);
@@ -37,11 +38,13 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb2: {
+        StorageDead(_3);
         StorageLive(_4);
         _4 = char::methods::<impl char>::to_digit(move _1, const 8_u32) -> [return: bb3, unwind unreachable];
     }
 
     bb3: {
+        StorageLive(_5);
         _5 = discriminant(_4);
         switchInt(move _5) -> [0: bb4, 1: bb5, otherwise: bb6];
     }
@@ -52,6 +55,7 @@ fn num_to_digit(_1: char) -> u32 {
 
     bb5: {
         _0 = move ((_4 as Some).0: u32);
+        StorageDead(_5);
         StorageDead(_4);
         goto -> bb8;
     }
@@ -61,6 +65,7 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb7: {
+        StorageDead(_3);
         _0 = const 0_u32;
         goto -> bb8;
     }
diff --git a/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-unwind.mir
index df7392edc50..cb70a83e7f8 100644
--- a/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-unwind.mir
+++ b/tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-unwind.mir
@@ -30,6 +30,7 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb1: {
+        StorageLive(_3);
         _3 = discriminant(_2);
         StorageDead(_7);
         StorageDead(_2);
@@ -37,11 +38,13 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb2: {
+        StorageDead(_3);
         StorageLive(_4);
         _4 = char::methods::<impl char>::to_digit(move _1, const 8_u32) -> [return: bb3, unwind continue];
     }
 
     bb3: {
+        StorageLive(_5);
         _5 = discriminant(_4);
         switchInt(move _5) -> [0: bb4, 1: bb5, otherwise: bb6];
     }
@@ -52,6 +55,7 @@ fn num_to_digit(_1: char) -> u32 {
 
     bb5: {
         _0 = move ((_4 as Some).0: u32);
+        StorageDead(_5);
         StorageDead(_4);
         goto -> bb8;
     }
@@ -61,6 +65,7 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb7: {
+        StorageDead(_3);
         _0 = const 0_u32;
         goto -> bb8;
     }
diff --git a/tests/mir-opt/pre-codegen/checked_ops.step_forward.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/checked_ops.step_forward.PreCodegen.after.mir
index 75f81c5aaca..e3c81061a46 100644
--- a/tests/mir-opt/pre-codegen/checked_ops.step_forward.PreCodegen.after.mir
+++ b/tests/mir-opt/pre-codegen/checked_ops.step_forward.PreCodegen.after.mir
@@ -36,8 +36,10 @@ fn step_forward(_1: u32, _2: usize) -> u32 {
 
     bb1: {
         StorageLive(_5);
+        StorageLive(_4);
         _4 = discriminant(_3);
         _5 = Eq(_4, const 1_isize);
+        StorageDead(_4);
         _6 = Not(move _5);
         StorageDead(_5);
         switchInt(move _6) -> [0: bb2, otherwise: bb3];
diff --git a/tests/mir-opt/pre-codegen/simple_option_map.ezmap.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/simple_option_map.ezmap.PreCodegen.after.mir
index 48b780aea62..80a470c9482 100644
--- a/tests/mir-opt/pre-codegen/simple_option_map.ezmap.PreCodegen.after.mir
+++ b/tests/mir-opt/pre-codegen/simple_option_map.ezmap.PreCodegen.after.mir
@@ -18,6 +18,7 @@ fn ezmap(_1: Option<i32>) -> Option<i32> {
     }
 
     bb0: {
+        StorageLive(_2);
         _2 = discriminant(_1);
         switchInt(move _2) -> [0: bb1, 1: bb2, otherwise: bb4];
     }
@@ -37,6 +38,7 @@ fn ezmap(_1: Option<i32>) -> Option<i32> {
     }
 
     bb3: {
+        StorageDead(_2);
         return;
     }
 
diff --git a/tests/mir-opt/pre-codegen/slice_filter.variant_a-{closure#0}.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/slice_filter.variant_a-{closure#0}.PreCodegen.after.mir
index ed286beb4ca..9c10e96b0ea 100644
--- a/tests/mir-opt/pre-codegen/slice_filter.variant_a-{closure#0}.PreCodegen.after.mir
+++ b/tests/mir-opt/pre-codegen/slice_filter.variant_a-{closure#0}.PreCodegen.after.mir
@@ -98,6 +98,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         StorageLive(_35);
         StorageLive(_11);
         _11 = _8;
+        StorageLive(_12);
+        StorageLive(_13);
         _12 = deref_copy _4;
         _13 = deref_copy _11;
         StorageLive(_14);
@@ -107,6 +109,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         _16 = Le(move _14, move _15);
         StorageDead(_15);
         StorageDead(_14);
+        StorageDead(_13);
+        StorageDead(_12);
         switchInt(move _16) -> [0: bb1, otherwise: bb2];
     }
 
@@ -126,6 +130,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         StorageLive(_37);
         StorageLive(_17);
         _17 = _6;
+        StorageLive(_18);
+        StorageLive(_19);
         _18 = deref_copy _10;
         _19 = deref_copy _17;
         StorageLive(_20);
@@ -135,6 +141,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         _22 = Le(move _20, move _21);
         StorageDead(_21);
         StorageDead(_20);
+        StorageDead(_19);
+        StorageDead(_18);
         switchInt(move _22) -> [0: bb3, otherwise: bb8];
     }
 
@@ -151,6 +159,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         StorageLive(_39);
         StorageLive(_23);
         _23 = _4;
+        StorageLive(_24);
+        StorageLive(_25);
         _24 = deref_copy _8;
         _25 = deref_copy _23;
         StorageLive(_26);
@@ -160,6 +170,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         _28 = Le(move _26, move _27);
         StorageDead(_27);
         StorageDead(_26);
+        StorageDead(_25);
+        StorageDead(_24);
         switchInt(move _28) -> [0: bb5, otherwise: bb6];
     }
 
@@ -179,6 +191,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         StorageLive(_41);
         StorageLive(_29);
         _29 = _10;
+        StorageLive(_30);
+        StorageLive(_31);
         _30 = deref_copy _6;
         _31 = deref_copy _29;
         StorageLive(_32);
@@ -188,6 +202,8 @@ fn variant_a::{closure#0}(_1: &mut {closure@$DIR/slice_filter.rs:7:25: 7:39}, _2
         _0 = Le(move _32, move _33);
         StorageDead(_33);
         StorageDead(_32);
+        StorageDead(_31);
+        StorageDead(_30);
         StorageDead(_29);
         StorageDead(_41);
         StorageDead(_40);
diff --git a/tests/mir-opt/separate_const_switch.identity.SeparateConstSwitch.diff b/tests/mir-opt/separate_const_switch.identity.SeparateConstSwitch.diff
index ca1528b6ab1..491db551a7d 100644
--- a/tests/mir-opt/separate_const_switch.identity.SeparateConstSwitch.diff
+++ b/tests/mir-opt/separate_const_switch.identity.SeparateConstSwitch.diff
@@ -48,6 +48,7 @@
   
       bb0: {
           StorageLive(_3);
+          StorageLive(_9);
           StorageLive(_10);
           StorageLive(_11);
           _9 = discriminant(_1);
@@ -57,6 +58,7 @@
       bb1: {
           StorageDead(_11);
           StorageDead(_10);
+          StorageDead(_9);
           _5 = discriminant(_3);
           switchInt(move _5) -> [0: bb2, 1: bb4, otherwise: bb3];
       }
diff --git a/tests/run-make/silly-file-names/Makefile b/tests/run-make/silly-file-names/Makefile
new file mode 100644
index 00000000000..a09bdb1c532
--- /dev/null
+++ b/tests/run-make/silly-file-names/Makefile
@@ -0,0 +1,18 @@
+# ignore-cross-compile we need to execute the binary
+# ignore-windows we create files with < and > in their names
+
+include ../tools.mk
+
+ifdef RUSTC_BLESS_TEST
+    RUSTC_TEST_OP = cp
+else
+    RUSTC_TEST_OP = $(DIFF)
+endif
+
+all:
+	echo '"comes from a file with a name that begins with <"' > "$(TMPDIR)/<leading-lt"
+	echo '"comes from a file with a name that ends with >"' > "$(TMPDIR)/trailing-gt>"
+	cp silly-file-names.rs "$(TMPDIR)/silly-file-names.rs"
+	$(RUSTC) "$(TMPDIR)/silly-file-names.rs" -o "$(TMPDIR)/silly-file-names"
+	"$(TMPDIR)/silly-file-names" > "$(TMPDIR)/silly-file-names.run.stdout"
+	$(RUSTC_TEST_OP) "$(TMPDIR)/silly-file-names.run.stdout" silly-file-names.run.stdout
diff --git a/tests/run-make/silly-file-names/silly-file-names.rs b/tests/run-make/silly-file-names/silly-file-names.rs
new file mode 100644
index 00000000000..a2008209141
--- /dev/null
+++ b/tests/run-make/silly-file-names/silly-file-names.rs
@@ -0,0 +1,4 @@
+fn main() {
+    println!(include!("<leading-lt"));
+    println!(include!("trailing-gt>"));
+}
diff --git a/tests/run-make/silly-file-names/silly-file-names.run.stdout b/tests/run-make/silly-file-names/silly-file-names.run.stdout
new file mode 100644
index 00000000000..fbc4c89e0f0
--- /dev/null
+++ b/tests/run-make/silly-file-names/silly-file-names.run.stdout
@@ -0,0 +1,2 @@
+comes from a file with a name that begins with <
+comes from a file with a name that ends with >
diff --git a/tests/rustdoc-js/impl-trait.js b/tests/rustdoc-js/impl-trait.js
index 710e594b547..00d67d639bd 100644
--- a/tests/rustdoc-js/impl-trait.js
+++ b/tests/rustdoc-js/impl-trait.js
@@ -1,3 +1,4 @@
+// exact-check
 // ignore-order
 
 const EXPECTED = [
@@ -20,9 +21,16 @@ const EXPECTED = [
     {
         'query': '-> Aaaaaaa',
         'others': [
-            { 'path': 'impl_trait::Ccccccc', 'name': 'fffffff' },
-            { 'path': 'impl_trait::Ccccccc', 'name': 'ddddddd' },
             { 'path': 'impl_trait', 'name': 'bbbbbbb' },
+            { 'path': 'impl_trait::Ccccccc', 'name': 'ddddddd' },
+            { 'path': 'impl_trait::Ccccccc', 'name': 'fffffff' },
+            { 'path': 'impl_trait::Ccccccc', 'name': 'ggggggg' },
+        ],
+    },
+    {
+        'query': '-> Bbbbbbb',
+        'others': [
+            { 'path': 'impl_trait::Ccccccc', 'name': 'ggggggg' },
         ],
     },
     {
@@ -31,13 +39,14 @@ const EXPECTED = [
             { 'path': 'impl_trait', 'name': 'Aaaaaaa' },
         ],
         'in_args': [
-            { 'path': 'impl_trait::Ccccccc', 'name': 'fffffff' },
             { 'path': 'impl_trait::Ccccccc', 'name': 'eeeeeee' },
+            { 'path': 'impl_trait::Ccccccc', 'name': 'fffffff' },
         ],
         'returned': [
-            { 'path': 'impl_trait::Ccccccc', 'name': 'fffffff' },
-            { 'path': 'impl_trait::Ccccccc', 'name': 'ddddddd' },
             { 'path': 'impl_trait', 'name': 'bbbbbbb' },
+            { 'path': 'impl_trait::Ccccccc', 'name': 'ddddddd' },
+            { 'path': 'impl_trait::Ccccccc', 'name': 'fffffff' },
+            { 'path': 'impl_trait::Ccccccc', 'name': 'ggggggg' },
         ],
     },
 ];
diff --git a/tests/rustdoc-js/impl-trait.rs b/tests/rustdoc-js/impl-trait.rs
index fb8869b46f3..d20fdd60ec9 100644
--- a/tests/rustdoc-js/impl-trait.rs
+++ b/tests/rustdoc-js/impl-trait.rs
@@ -1,6 +1,9 @@
 pub trait Aaaaaaa {}
 
+pub trait Bbbbbbb {}
+
 impl Aaaaaaa for () {}
+impl Bbbbbbb for () {}
 
 pub fn bbbbbbb() -> impl Aaaaaaa {
     ()
@@ -18,4 +21,7 @@ impl Ccccccc {
     pub fn fffffff(&self, x: impl Aaaaaaa) -> impl Aaaaaaa {
         x
     }
+    pub fn ggggggg(&self) -> impl Aaaaaaa + Bbbbbbb {
+        ()
+    }
 }
diff --git a/tests/rustdoc-ui/custom_code_classes_in_docs-warning3.stderr b/tests/rustdoc-ui/custom_code_classes_in_docs-warning3.stderr
index 4f2ded78c29..ad049804213 100644
--- a/tests/rustdoc-ui/custom_code_classes_in_docs-warning3.stderr
+++ b/tests/rustdoc-ui/custom_code_classes_in_docs-warning3.stderr
@@ -28,6 +28,8 @@ LL | |
 LL | | /// main;
 LL | | /// ```
    | |_______^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/rustdoc-ui/intra-doc/broken-link-in-unused-doc-string.stderr b/tests/rustdoc-ui/intra-doc/broken-link-in-unused-doc-string.stderr
index 83e0d3962ca..b25849f25b4 100644
--- a/tests/rustdoc-ui/intra-doc/broken-link-in-unused-doc-string.stderr
+++ b/tests/rustdoc-ui/intra-doc/broken-link-in-unused-doc-string.stderr
@@ -22,6 +22,7 @@ LL | /// [1]
    |      ^ no item named `1` in scope
    |
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/rustdoc-ui/issues/issue-105742.stderr b/tests/rustdoc-ui/issues/issue-105742.stderr
index b63176c9149..4d3f9f5bced 100644
--- a/tests/rustdoc-ui/issues/issue-105742.stderr
+++ b/tests/rustdoc-ui/issues/issue-105742.stderr
@@ -169,6 +169,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     <Self as SVec>::Item<'a>,
@@ -185,6 +186,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     <Self as SVec>::Item<T>,
@@ -201,6 +203,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     Output = <Index<<Self as SVec>::Item<'a>,
@@ -217,6 +220,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     Output = <Index<<Self as SVec>::Item<T>,
@@ -233,6 +237,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     Output = <Self as SVec>::Item<'a>> as SVec>::Item,
@@ -249,6 +254,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     Output = <Self as SVec>::Item<T>> as SVec>::Item,
@@ -265,6 +271,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     Output = <Self as SVec>::Item> as SVec>::Item<'a>,
@@ -281,6 +288,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     Output = <Self as SVec>::Item> as SVec>::Item<T>,
@@ -327,6 +335,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     <Self as SVec>::Item<'a>,
@@ -343,6 +352,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     <Self as SVec>::Item<T>,
@@ -359,6 +369,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     Output = <Index<<Self as SVec>::Item<'a>,
@@ -375,6 +386,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     Output = <Index<<Self as SVec>::Item<T>,
@@ -391,6 +403,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     Output = <Self as SVec>::Item<'a>> as SVec>::Item,
@@ -407,6 +420,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     Output = <Self as SVec>::Item<T>> as SVec>::Item,
@@ -423,6 +437,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |     type Item<'a, T>;
    |          ^^^^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     Output = <Self as SVec>::Item> as SVec>::Item<'a>,
@@ -439,6 +454,7 @@ note: associated type defined here, with 1 generic parameter: `T`
    |
 LL |     type Item<'a, T>;
    |          ^^^^     -
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing generic argument
    |
 LL |     Output = <Self as SVec>::Item> as SVec>::Item<T>,
diff --git a/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.rs b/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.rs
index c34ea0567a9..ce94a06c39e 100644
--- a/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.rs
+++ b/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.rs
@@ -1,12 +1,7 @@
+// compile-flags: -Zdeduplicate-diagnostics=yes
 #![deny(unknown_lints)]
 //~^ NOTE defined here
 #![allow(rustdoc::missing_doc_code_examples)]
 //~^ ERROR unknown lint
-//~| ERROR unknown lint
-//~| ERROR unknown lint
 //~| NOTE lint is unstable
-//~| NOTE lint is unstable
-//~| NOTE lint is unstable
-//~| NOTE see issue
-//~| NOTE see issue
 //~| NOTE see issue
diff --git a/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.stderr b/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.stderr
index 326dcfe3bde..b8a08e94312 100644
--- a/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.stderr
+++ b/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.stderr
@@ -1,5 +1,5 @@
 error: unknown lint: `rustdoc::missing_doc_code_examples`
-  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:3:1
+  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:4:1
    |
 LL | #![allow(rustdoc::missing_doc_code_examples)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -8,30 +8,10 @@ LL | #![allow(rustdoc::missing_doc_code_examples)]
    = note: see issue #101730 <https://github.com/rust-lang/rust/issues/101730> for more information
    = help: add `#![feature(rustdoc_missing_doc_code_examples)]` to the crate attributes to enable
 note: the lint level is defined here
-  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:1:9
+  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:2:9
    |
 LL | #![deny(unknown_lints)]
    |         ^^^^^^^^^^^^^
 
-error: unknown lint: `rustdoc::missing_doc_code_examples`
-  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:3:1
-   |
-LL | #![allow(rustdoc::missing_doc_code_examples)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: the `rustdoc::missing_doc_code_examples` lint is unstable
-   = note: see issue #101730 <https://github.com/rust-lang/rust/issues/101730> for more information
-   = help: add `#![feature(rustdoc_missing_doc_code_examples)]` to the crate attributes to enable
-
-error: unknown lint: `rustdoc::missing_doc_code_examples`
-  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:3:1
-   |
-LL | #![allow(rustdoc::missing_doc_code_examples)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: the `rustdoc::missing_doc_code_examples` lint is unstable
-   = note: see issue #101730 <https://github.com/rust-lang/rust/issues/101730> for more information
-   = help: add `#![feature(rustdoc_missing_doc_code_examples)]` to the crate attributes to enable
-
-error: aborting due to 3 previous errors
+error: aborting due to previous error
 
diff --git a/tests/rustdoc-ui/unescaped_backticks.stderr b/tests/rustdoc-ui/unescaped_backticks.stderr
index 83822f778d0..2b4e491b1fe 100644
--- a/tests/rustdoc-ui/unescaped_backticks.stderr
+++ b/tests/rustdoc-ui/unescaped_backticks.stderr
@@ -302,6 +302,7 @@ LL | |     /// level changes.
    = help: if you meant to use a literal backtick, escape it
             change: or `None` if it isn't.
            to this: or `None\` if it isn't.
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unescaped backtick
   --> $DIR/unescaped_backticks.rs:323:5
@@ -321,6 +322,7 @@ LL | |     /// level changes.
    = help: if you meant to use a literal backtick, escape it
             change: `on_event` should be called.
            to this: `on_event\` should be called.
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unescaped backtick
   --> $DIR/unescaped_backticks.rs:323:5
@@ -340,6 +342,7 @@ LL | |     /// level changes.
    = help: if you meant to use a literal backtick, escape it
             change: [`rebuild_interest_cache`][rebuild] is called after the value of the max
            to this: [`rebuild_interest_cache\`][rebuild] is called after the value of the max
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unescaped backtick
   --> $DIR/unescaped_backticks.rs:349:56
diff --git a/tests/rustdoc/issue-25001.rs b/tests/rustdoc/anchor-id-duplicate-method-name-25001.rs
index 268fae59496..ffb0765d3c3 100644
--- a/tests/rustdoc/issue-25001.rs
+++ b/tests/rustdoc/anchor-id-duplicate-method-name-25001.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/25001
+#![crate_name="issue_25001"]
+
 // @has issue_25001/struct.Foo.html
 pub struct Foo<T>(T);
 
diff --git a/tests/rustdoc/issue-28478.rs b/tests/rustdoc/anchor-id-trait-tymethod-28478.rs
index 497276e6826..5685040dc1e 100644
--- a/tests/rustdoc/issue-28478.rs
+++ b/tests/rustdoc/anchor-id-trait-tymethod-28478.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/28478
+#![crate_name="issue_28478"]
+
 #![feature(associated_type_defaults)]
 
 // @has issue_28478/trait.Bar.html
diff --git a/tests/rustdoc/issue-21474.rs b/tests/rustdoc/deduplicate-glob-import-impl-21474.rs
index 5de26abace6..2a675b4b6ef 100644
--- a/tests/rustdoc/issue-21474.rs
+++ b/tests/rustdoc/deduplicate-glob-import-impl-21474.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/21474
+#![crate_name="issue_21474"]
+
 pub use inner::*;
 
 mod inner {
diff --git a/tests/rustdoc/issue-22025.rs b/tests/rustdoc/deduplicate-trait-impl-22025.rs
index a721a15f463..65a556e3a70 100644
--- a/tests/rustdoc/issue-22025.rs
+++ b/tests/rustdoc/deduplicate-trait-impl-22025.rs
@@ -1,6 +1,9 @@
 // aux-build:issue-22025.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/22025
+#![crate_name="issue_22025"]
+
 extern crate issue_22025;
 
 pub use issue_22025::foo::{Foo, Bar};
diff --git a/tests/rustdoc/doctest-hide-empty-line-23106.rs b/tests/rustdoc/doctest-hide-empty-line-23106.rs
new file mode 100644
index 00000000000..8e1e2cf098c
--- /dev/null
+++ b/tests/rustdoc/doctest-hide-empty-line-23106.rs
@@ -0,0 +1,10 @@
+// compile-flags:--test
+
+// https://github.com/rust-lang/rust/issues/23106
+#![crate_name="issue_23106"]
+
+/// ```
+/// #
+/// ```
+pub fn main() {
+}
diff --git a/tests/rustdoc/issue-23744.rs b/tests/rustdoc/doctest-markdown-inline-parse-23744.rs
index 642817396b2..128e2daba07 100644
--- a/tests/rustdoc/issue-23744.rs
+++ b/tests/rustdoc/doctest-markdown-inline-parse-23744.rs
@@ -1,5 +1,8 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/23744
+#![crate_name="issue_23744"]
+
 /// Example of rustdoc incorrectly parsing <code>```rust,should_panic</code>.
 ///
 /// ```should_panic
diff --git a/tests/rustdoc/issue-25944.rs b/tests/rustdoc/doctest-multi-line-string-literal-25944.rs
index 49625294bbe..eec796e4fbf 100644
--- a/tests/rustdoc/issue-25944.rs
+++ b/tests/rustdoc/doctest-multi-line-string-literal-25944.rs
@@ -1,5 +1,8 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/25944
+#![crate_name="issue_25944"]
+
 /// ```
 /// let a = r#"
 /// foo
diff --git a/tests/rustdoc/issue-22038.rs b/tests/rustdoc/extern-fn-22038.rs
index de6cc78707c..72d39c32a1c 100644
--- a/tests/rustdoc/issue-22038.rs
+++ b/tests/rustdoc/extern-fn-22038.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/22038
+#![crate_name="issue_22038"]
+
 extern "C" {
     // @has issue_22038/fn.foo1.html \
     //      '//pre[@class="rust item-decl"]' 'pub unsafe extern "C" fn foo1()'
diff --git a/tests/rustdoc/issue-28927.rs b/tests/rustdoc/ice-reexport-crate-root-28927.rs
index 38a520850b6..26debfc60e4 100644
--- a/tests/rustdoc/issue-28927.rs
+++ b/tests/rustdoc/ice-reexport-crate-root-28927.rs
@@ -2,5 +2,8 @@
 // aux-build:issue-28927-1.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/28927
+#![crate_name="issue_28927"]
+
 pub extern crate issue_28927_1 as inner1;
 pub use inner1 as foo;
diff --git a/tests/rustdoc/issue-21092.rs b/tests/rustdoc/impl-assoc-type-21092.rs
index b054145a483..f01f098a92f 100644
--- a/tests/rustdoc/issue-21092.rs
+++ b/tests/rustdoc/impl-assoc-type-21092.rs
@@ -1,6 +1,9 @@
 // aux-build:issue-21092.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/21092
+#![crate_name="issue_21092"]
+
 extern crate issue_21092;
 
 // @has issue_21092/struct.Bar.html
diff --git a/tests/rustdoc/inline_cross/auxiliary/fn-type.rs b/tests/rustdoc/inline_cross/auxiliary/fn-type.rs
new file mode 100644
index 00000000000..dacda516bb8
--- /dev/null
+++ b/tests/rustdoc/inline_cross/auxiliary/fn-type.rs
@@ -0,0 +1 @@
+pub type F = for<'z, 'a, '_unused> fn(&'z for<'b> fn(&'b str), &'a ()) -> &'a ();
diff --git a/tests/rustdoc/inline_cross/auxiliary/impl_trait_aux.rs b/tests/rustdoc/inline_cross/auxiliary/impl_trait_aux.rs
index 42cfc3dc319..fa61312ebc8 100644
--- a/tests/rustdoc/inline_cross/auxiliary/impl_trait_aux.rs
+++ b/tests/rustdoc/inline_cross/auxiliary/impl_trait_aux.rs
@@ -15,7 +15,7 @@ pub fn func4<T: Iterator<Item = impl Clone>>(_x: T) {}
 
 pub fn func5(
     _f: impl for<'any> Fn(&'any str, &'any str) -> bool + for<'r> Other<T<'r> = ()>,
-    _a: impl for<'alpha, 'beta> Auxiliary<'alpha, Item<'beta> = fn(&'beta ())>,
+    _a: impl for<'beta, 'alpha, '_gamma> Auxiliary<'alpha, Item<'beta> = fn(&'beta ())>,
 ) {}
 
 pub trait Other {
diff --git a/tests/rustdoc/auxiliary/issue-21801.rs b/tests/rustdoc/inline_cross/auxiliary/issue-21801.rs
index 732612ff000..732612ff000 100644
--- a/tests/rustdoc/auxiliary/issue-21801.rs
+++ b/tests/rustdoc/inline_cross/auxiliary/issue-21801.rs
diff --git a/tests/rustdoc/auxiliary/issue-23207-1.rs b/tests/rustdoc/inline_cross/auxiliary/issue-23207-1.rs
index 8531d5f1acd..8531d5f1acd 100644
--- a/tests/rustdoc/auxiliary/issue-23207-1.rs
+++ b/tests/rustdoc/inline_cross/auxiliary/issue-23207-1.rs
diff --git a/tests/rustdoc/auxiliary/issue-23207-2.rs b/tests/rustdoc/inline_cross/auxiliary/issue-23207-2.rs
index b92b1665316..b92b1665316 100644
--- a/tests/rustdoc/auxiliary/issue-23207-2.rs
+++ b/tests/rustdoc/inline_cross/auxiliary/issue-23207-2.rs
diff --git a/tests/rustdoc/auxiliary/issue-27362-aux.rs b/tests/rustdoc/inline_cross/auxiliary/issue-27362-aux.rs
index 077bdc33e66..077bdc33e66 100644
--- a/tests/rustdoc/auxiliary/issue-27362-aux.rs
+++ b/tests/rustdoc/inline_cross/auxiliary/issue-27362-aux.rs
diff --git a/tests/rustdoc/inline_cross/auxiliary/non_lifetime_binders.rs b/tests/rustdoc/inline_cross/auxiliary/non_lifetime_binders.rs
new file mode 100644
index 00000000000..9170be16892
--- /dev/null
+++ b/tests/rustdoc/inline_cross/auxiliary/non_lifetime_binders.rs
@@ -0,0 +1,10 @@
+#![feature(non_lifetime_binders)]
+
+pub trait Trait<T> {}
+
+pub fn f(_: impl for<T> Trait<T>) {}
+
+pub fn g<T>(_: T)
+where
+    T: for<U> Trait<U>,
+{}
diff --git a/tests/rustdoc/issue-27362.rs b/tests/rustdoc/inline_cross/const-fn-27362.rs
index 097e4e3b03d..39b904662e0 100644
--- a/tests/rustdoc/issue-27362.rs
+++ b/tests/rustdoc/inline_cross/const-fn-27362.rs
@@ -1,6 +1,9 @@
 // aux-build:issue-27362-aux.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/27362
+#![crate_name="issue_27362"]
+
 extern crate issue_27362_aux;
 
 pub use issue_27362_aux::*;
diff --git a/tests/rustdoc/issue-23207.rs b/tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs
index 1a4b849ee82..4e9596db589 100644
--- a/tests/rustdoc/issue-23207.rs
+++ b/tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs
@@ -2,6 +2,9 @@
 // aux-build:issue-23207-2.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/23207
+#![crate_name="issue_23207"]
+
 extern crate issue_23207_2;
 
 // @has issue_23207/fmt/index.html
diff --git a/tests/rustdoc/inline_cross/fn-type.rs b/tests/rustdoc/inline_cross/fn-type.rs
new file mode 100644
index 00000000000..e65790d3b05
--- /dev/null
+++ b/tests/rustdoc/inline_cross/fn-type.rs
@@ -0,0 +1,12 @@
+// Make sure that we print the higher-ranked parameters of cross-crate function pointer types.
+// They should be rendered exactly as the user wrote it, i.e., in source order and with unused
+// parameters present, not stripped.
+
+// aux-crate:fn_type=fn-type.rs
+// edition: 2021
+#![crate_name = "user"]
+
+// @has user/type.F.html
+// @has - '//*[@class="rust item-decl"]//code' \
+//     "for<'z, 'a, '_unused> fn(_: &'z for<'b> fn(_: &'b str), _: &'a ()) -> &'a ();"
+pub use fn_type::F;
diff --git a/tests/rustdoc/inline_cross/impl_trait.rs b/tests/rustdoc/inline_cross/impl_trait.rs
index 5c802c51486..9b22026e490 100644
--- a/tests/rustdoc/inline_cross/impl_trait.rs
+++ b/tests/rustdoc/inline_cross/impl_trait.rs
@@ -29,7 +29,7 @@ pub use impl_trait_aux::func4;
 // @has impl_trait/fn.func5.html
 // @has - '//pre[@class="rust item-decl"]' "func5("
 // @has - '//pre[@class="rust item-decl"]' "_f: impl for<'any> Fn(&'any str, &'any str) -> bool + for<'r> Other<T<'r> = ()>,"
-// @has - '//pre[@class="rust item-decl"]' "_a: impl for<'alpha, 'beta> Auxiliary<'alpha, Item<'beta> = fn(_: &'beta ())>"
+// @has - '//pre[@class="rust item-decl"]' "_a: impl for<'beta, 'alpha, '_gamma> Auxiliary<'alpha, Item<'beta> = fn(_: &'beta ())>"
 // @!has - '//pre[@class="rust item-decl"]' 'where'
 pub use impl_trait_aux::func5;
 
diff --git a/tests/rustdoc/inline_cross/non_lifetime_binders.rs b/tests/rustdoc/inline_cross/non_lifetime_binders.rs
new file mode 100644
index 00000000000..9d3085c3ef2
--- /dev/null
+++ b/tests/rustdoc/inline_cross/non_lifetime_binders.rs
@@ -0,0 +1,13 @@
+// aux-crate:non_lifetime_binders=non_lifetime_binders.rs
+// edition: 2021
+#![crate_name = "user"]
+
+// @has user/fn.f.html
+// @has - '//pre[@class="rust item-decl"]' "f(_: impl for<T> Trait<T>)"
+pub use non_lifetime_binders::f;
+
+// @has user/fn.g.html
+// @has - '//pre[@class="rust item-decl"]' "g<T>(_: T)\
+// where \
+//     T: for<U> Trait<U>"
+pub use non_lifetime_binders::g;
diff --git a/tests/rustdoc/issue-21801.rs b/tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs
index 29d2ec64c20..bcbb2e9f408 100644
--- a/tests/rustdoc/issue-21801.rs
+++ b/tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs
@@ -1,6 +1,9 @@
 // aux-build:issue-21801.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/21801
+#![crate_name="issue_21801"]
+
 extern crate issue_21801;
 
 // @has issue_21801/struct.Foo.html
diff --git a/tests/rustdoc/issue-23106.rs b/tests/rustdoc/issue-23106.rs
deleted file mode 100644
index 8cda2fc3380..00000000000
--- a/tests/rustdoc/issue-23106.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-// compile-flags:--test
-
-/// ```
-/// #
-/// ```
-pub fn main() {
-}
diff --git a/tests/rustdoc/issue-23812.rs b/tests/rustdoc/macro-doc-comment-23812.rs
index 08fd1833bce..57c18510b1e 100644
--- a/tests/rustdoc/issue-23812.rs
+++ b/tests/rustdoc/macro-doc-comment-23812.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/23812
+#![crate_name="issue_23812"]
+
 macro_rules! doc {
     (#[$outer:meta] mod $i:ident { #![$inner:meta] }) =>
     (
diff --git a/tests/rustdoc/issue-27862.rs b/tests/rustdoc/markdown-table-escape-pipe-27862.rs
index 77522f1be23..9af75d24888 100644
--- a/tests/rustdoc/issue-27862.rs
+++ b/tests/rustdoc/markdown-table-escape-pipe-27862.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/27862
+#![crate_name="issue_27862"]
+
 /// Tests  | Table
 /// ------|-------------
 /// t = b | id = \|x\| x
diff --git a/tests/rustdoc/issue-23511.rs b/tests/rustdoc/search-index-primitive-inherent-method-23511.rs
index 21d02842431..1d0fe27e192 100644
--- a/tests/rustdoc/issue-23511.rs
+++ b/tests/rustdoc/search-index-primitive-inherent-method-23511.rs
@@ -2,6 +2,9 @@
 #![feature(rustdoc_internals)]
 #![no_std]
 
+// https://github.com/rust-lang/rust/issues/23511
+#![crate_name="issue_23511"]
+
 pub mod str {
     #![rustc_doc_primitive = "str"]
 
diff --git a/tests/rustdoc/issue-26606.rs b/tests/rustdoc/src-link-external-macro-26606.rs
index d5cb2c710cd..de717a5273b 100644
--- a/tests/rustdoc/issue-26606.rs
+++ b/tests/rustdoc/src-link-external-macro-26606.rs
@@ -2,10 +2,13 @@
 // ignore-cross-compile
 // build-aux-docs
 
+// https://github.com/rust-lang/rust/issues/26606
+#![crate_name="issue_26606"]
+
 // @has issue_26606_macro/macro.make_item.html
 #[macro_use]
 extern crate issue_26606_macro;
 
 // @has issue_26606/constant.FOO.html
-// @has - '//a[@href="../src/issue_26606/issue-26606.rs.html#11"]' 'source'
+// @has - '//a[@href="../src/issue_26606/src-link-external-macro-26606.rs.html#14"]' 'source'
 make_item!(FOO);
diff --git a/tests/rustdoc/issue-26995.rs b/tests/rustdoc/src-mod-path-absolute-26995.rs
index fedc9f51749..b67fd9b26db 100644
--- a/tests/rustdoc/issue-26995.rs
+++ b/tests/rustdoc/src-mod-path-absolute-26995.rs
@@ -1,6 +1,9 @@
 // ignore-windows
 // compile-flags: --no-defaults
 
+// https://github.com/rust-lang/rust/issues/26995
+#![crate_name="issue_26995"]
+
 // @has src/issue_26995/dev/null.html
 // @has issue_26995/null/index.html '//a/@href' '../../src/issue_26995/dev/null.html'
 #[path="/dev/null"]
diff --git a/tests/rustdoc/issue-27759.rs b/tests/rustdoc/staged-api-feature-issue-27759.rs
index 65e0f7cb87b..56a45a600da 100644
--- a/tests/rustdoc/issue-27759.rs
+++ b/tests/rustdoc/staged-api-feature-issue-27759.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/27759
+#![crate_name="issue_27759"]
+
 #![feature(staged_api)]
 #![doc(issue_tracker_base_url = "http://issue_url/")]
 
diff --git a/tests/rustdoc/issue-27104.rs b/tests/rustdoc/strip-priv-imports-pass-27104.rs
index 9f2fd907114..e400a8f5011 100644
--- a/tests/rustdoc/issue-27104.rs
+++ b/tests/rustdoc/strip-priv-imports-pass-27104.rs
@@ -2,6 +2,9 @@
 // aux-build:empty.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/27104
+#![crate_name="issue_27104"]
+
 // @has issue_27104/index.html
 // @!hasraw - 'extern crate std'
 // @!hasraw - 'use std::prelude::'
diff --git a/tests/ui-fulldeps/plugin/lint-plugin-forbid-attrs.stderr b/tests/ui-fulldeps/plugin/lint-plugin-forbid-attrs.stderr
index ae34b25cc2f..66ea2e88f0c 100644
--- a/tests/ui-fulldeps/plugin/lint-plugin-forbid-attrs.stderr
+++ b/tests/ui-fulldeps/plugin/lint-plugin-forbid-attrs.stderr
@@ -27,6 +27,8 @@ LL | #![forbid(test_lint)]
 ...
 LL | #[allow(test_lint)]
    |         ^^^^^^^^^ overruled by previous forbid
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: use of deprecated attribute `plugin`: compiler plugins are deprecated. See https://github.com/rust-lang/rust/pull/64675
   --> $DIR/lint-plugin-forbid-attrs.rs:5:1
diff --git a/tests/ui-fulldeps/plugin/lint-plugin-forbid-cmdline.stderr b/tests/ui-fulldeps/plugin/lint-plugin-forbid-cmdline.stderr
index 491c4d20646..9dbad702545 100644
--- a/tests/ui-fulldeps/plugin/lint-plugin-forbid-cmdline.stderr
+++ b/tests/ui-fulldeps/plugin/lint-plugin-forbid-cmdline.stderr
@@ -21,6 +21,7 @@ LL | #[allow(test_lint)]
    |         ^^^^^^^^^ overruled by previous forbid
    |
    = note: `forbid` lint level was set on command line
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: use of deprecated attribute `plugin`: compiler plugins are deprecated. See https://github.com/rust-lang/rust/pull/64675
   --> $DIR/lint-plugin-forbid-cmdline.rs:6:1
diff --git a/tests/ui-fulldeps/plugin/lint-tool-cmdline-allow.stderr b/tests/ui-fulldeps/plugin/lint-tool-cmdline-allow.stderr
index 0e661795999..4916b180a36 100644
--- a/tests/ui-fulldeps/plugin/lint-tool-cmdline-allow.stderr
+++ b/tests/ui-fulldeps/plugin/lint-tool-cmdline-allow.stderr
@@ -8,6 +8,7 @@ warning: lint name `test_lint` is deprecated and may not have an effect in the f
    |
    = help: change it to clippy::test_lint
    = note: requested on the command line with `-A test_lint`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: item is named 'lintme'
   --> $DIR/lint-tool-cmdline-allow.rs:9:1
@@ -29,6 +30,7 @@ warning: lint name `test_lint` is deprecated and may not have an effect in the f
    |
    = help: change it to clippy::test_lint
    = note: requested on the command line with `-A test_lint`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 5 warnings emitted
 
diff --git a/tests/ui-fulldeps/plugin/lint-tool-test.stderr b/tests/ui-fulldeps/plugin/lint-tool-test.stderr
index 027cf8f80cf..d1f0714f042 100644
--- a/tests/ui-fulldeps/plugin/lint-tool-test.stderr
+++ b/tests/ui-fulldeps/plugin/lint-tool-test.stderr
@@ -23,12 +23,16 @@ warning: lint name `test_lint` is deprecated and may not have an effect in the f
    |
 LL | #![cfg_attr(foo, warn(test_lint))]
    |                       ^^^^^^^^^ help: change it to: `clippy::test_lint`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint name `clippy_group` is deprecated and may not have an effect in the future.
   --> $DIR/lint-tool-test.rs:13:9
    |
 LL | #![deny(clippy_group)]
    |         ^^^^^^^^^^^^ help: change it to: `clippy::group`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: item is named 'lintme'
   --> $DIR/lint-tool-test.rs:18:1
@@ -56,6 +60,8 @@ warning: lint name `test_group` is deprecated and may not have an effect in the
    |
 LL | #[allow(test_group)]
    |         ^^^^^^^^^^ help: change it to: `clippy::test_group`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `this_lint_does_not_exist`
   --> $DIR/lint-tool-test.rs:33:8
@@ -78,18 +84,24 @@ warning: lint name `test_lint` is deprecated and may not have an effect in the f
    |
 LL | #![cfg_attr(foo, warn(test_lint))]
    |                       ^^^^^^^^^ help: change it to: `clippy::test_lint`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint name `clippy_group` is deprecated and may not have an effect in the future.
   --> $DIR/lint-tool-test.rs:13:9
    |
 LL | #![deny(clippy_group)]
    |         ^^^^^^^^^^^^ help: change it to: `clippy::group`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint name `test_group` is deprecated and may not have an effect in the future.
   --> $DIR/lint-tool-test.rs:29:9
    |
 LL | #[allow(test_group)]
    |         ^^^^^^^^^^ help: change it to: `clippy::test_group`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors; 11 warnings emitted
 
diff --git a/tests/ui-fulldeps/session-diagnostic/diagnostic-derive.stderr b/tests/ui-fulldeps/session-diagnostic/diagnostic-derive.stderr
index ca09f1f0153..014cd5a73bd 100644
--- a/tests/ui-fulldeps/session-diagnostic/diagnostic-derive.stderr
+++ b/tests/ui-fulldeps/session-diagnostic/diagnostic-derive.stderr
@@ -414,6 +414,8 @@ error: `#[lint(...)]` is not a valid attribute
    |
 LL | #[lint(no_crate_example, code = "E0123")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: diagnostic slug not specified
   --> $DIR/diagnostic-derive.rs:601:1
diff --git a/tests/ui-fulldeps/stable-mir/crate-info.rs b/tests/ui-fulldeps/stable-mir/crate-info.rs
index ce4ee3c2463..d482f62ff06 100644
--- a/tests/ui-fulldeps/stable-mir/crate-info.rs
+++ b/tests/ui-fulldeps/stable-mir/crate-info.rs
@@ -47,12 +47,12 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
     assert_eq!(body.blocks.len(), 1);
     let block = &body.blocks[0];
     assert_eq!(block.statements.len(), 1);
-    match &block.statements[0] {
-        stable_mir::mir::Statement::Assign(..) => {}
+    match &block.statements[0].kind {
+        stable_mir::mir::StatementKind::Assign(..) => {}
         other => panic!("{other:?}"),
     }
-    match &block.terminator {
-        stable_mir::mir::Terminator::Return => {}
+    match &block.terminator.kind {
+        stable_mir::mir::TerminatorKind::Return => {}
         other => panic!("{other:?}"),
     }
 
@@ -61,8 +61,8 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
     assert_eq!(body.locals.len(), 7);
     assert_eq!(body.blocks.len(), 4);
     let block = &body.blocks[0];
-    match &block.terminator {
-        stable_mir::mir::Terminator::Call { .. } => {}
+    match &block.terminator.kind {
+        stable_mir::mir::TerminatorKind::Call { .. } => {}
         other => panic!("{other:?}"),
     }
 
@@ -70,27 +70,27 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
     let body = types.body();
     assert_eq!(body.locals.len(), 6);
     assert_matches!(
-        body.locals[0].kind(),
+        body.locals[0].ty.kind(),
         stable_mir::ty::TyKind::RigidTy(stable_mir::ty::RigidTy::Bool)
     );
     assert_matches!(
-        body.locals[1].kind(),
+        body.locals[1].ty.kind(),
         stable_mir::ty::TyKind::RigidTy(stable_mir::ty::RigidTy::Bool)
     );
     assert_matches!(
-        body.locals[2].kind(),
+        body.locals[2].ty.kind(),
         stable_mir::ty::TyKind::RigidTy(stable_mir::ty::RigidTy::Char)
     );
     assert_matches!(
-        body.locals[3].kind(),
+        body.locals[3].ty.kind(),
         stable_mir::ty::TyKind::RigidTy(stable_mir::ty::RigidTy::Int(stable_mir::ty::IntTy::I32))
     );
     assert_matches!(
-        body.locals[4].kind(),
+        body.locals[4].ty.kind(),
         stable_mir::ty::TyKind::RigidTy(stable_mir::ty::RigidTy::Uint(stable_mir::ty::UintTy::U64))
     );
     assert_matches!(
-        body.locals[5].kind(),
+        body.locals[5].ty.kind(),
         stable_mir::ty::TyKind::RigidTy(stable_mir::ty::RigidTy::Float(
             stable_mir::ty::FloatTy::F64
         ))
@@ -100,8 +100,8 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
     let body = drop.body();
     assert_eq!(body.blocks.len(), 2);
     let block = &body.blocks[0];
-    match &block.terminator {
-        stable_mir::mir::Terminator::Drop { .. } => {}
+    match &block.terminator.kind {
+        stable_mir::mir::TerminatorKind::Drop { .. } => {}
         other => panic!("{other:?}"),
     }
 
@@ -109,15 +109,15 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
     let body = assert.body();
     assert_eq!(body.blocks.len(), 2);
     let block = &body.blocks[0];
-    match &block.terminator {
-        stable_mir::mir::Terminator::Assert { .. } => {}
+    match &block.terminator.kind {
+        stable_mir::mir::TerminatorKind::Assert { .. } => {}
         other => panic!("{other:?}"),
     }
 
     let monomorphic = get_item(&items, (DefKind::Fn, "monomorphic")).unwrap();
     for block in monomorphic.body().blocks {
-        match &block.terminator {
-            stable_mir::mir::Terminator::Call { func, .. } => match func {
+        match &block.terminator.kind {
+            stable_mir::mir::TerminatorKind::Call { func, .. } => match func {
                 stable_mir::mir::Operand::Constant(c) => match &c.literal.literal {
                     stable_mir::ty::ConstantKind::Allocated(alloc) => {
                         assert!(alloc.bytes.is_empty());
@@ -127,7 +127,7 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
                                 mut args,
                             )) => {
                                 let func = def.body();
-                                match func.locals[1]
+                                match func.locals[1].ty
                                     .fold(&mut args)
                                     .continue_value()
                                     .unwrap()
@@ -149,7 +149,7 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
                 },
                 other => panic!("{other:?}"),
             },
-            stable_mir::mir::Terminator::Return => {}
+            stable_mir::mir::TerminatorKind::Return => {}
             other => panic!("{other:?}"),
         }
     }
diff --git a/tests/ui/allocator/not-an-allocator.stderr b/tests/ui/allocator/not-an-allocator.stderr
index 62bb0679f81..e1967b70013 100644
--- a/tests/ui/allocator/not-an-allocator.stderr
+++ b/tests/ui/allocator/not-an-allocator.stderr
@@ -18,6 +18,7 @@ LL | static A: usize = 0;
    |           ^^^^^ the trait `GlobalAlloc` is not implemented for `usize`
    |
    = help: the trait `GlobalAlloc` is implemented for `System`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this error originates in the attribute macro `global_allocator` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `usize: GlobalAlloc` is not satisfied
@@ -29,6 +30,7 @@ LL | static A: usize = 0;
    |           ^^^^^ the trait `GlobalAlloc` is not implemented for `usize`
    |
    = help: the trait `GlobalAlloc` is implemented for `System`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this error originates in the attribute macro `global_allocator` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `usize: GlobalAlloc` is not satisfied
@@ -40,6 +42,7 @@ LL | static A: usize = 0;
    |           ^^^^^ the trait `GlobalAlloc` is not implemented for `usize`
    |
    = help: the trait `GlobalAlloc` is implemented for `System`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this error originates in the attribute macro `global_allocator` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 4 previous errors
diff --git a/tests/ui/array-slice-vec/vector-no-ann.stderr b/tests/ui/array-slice-vec/vector-no-ann.stderr
index d2ea08aa474..619417a73c9 100644
--- a/tests/ui/array-slice-vec/vector-no-ann.stderr
+++ b/tests/ui/array-slice-vec/vector-no-ann.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `Vec<T>`
   --> $DIR/vector-no-ann.rs:2:9
    |
 LL |     let _foo = Vec::new();
-   |         ^^^^
+   |         ^^^^   ---------- type must be known at this point
    |
 help: consider giving `_foo` an explicit type, where the type for type parameter `T` is specified
    |
diff --git a/tests/ui/asm/x86_64/issue-96797.rs b/tests/ui/asm/x86_64/issue-96797.rs
index 951dd949b32..6c22c2f6c94 100644
--- a/tests/ui/asm/x86_64/issue-96797.rs
+++ b/tests/ui/asm/x86_64/issue-96797.rs
@@ -11,7 +11,14 @@ use std::arch::global_asm;
 #[no_mangle]
 fn my_func() {}
 
-global_asm!("call_foobar: jmp {}", sym foobar);
+global_asm!("
+.globl call_foobar
+.type call_foobar,@function
+.pushsection .text.call_foobar,\"ax\",@progbits
+call_foobar: jmp {}
+.size call_foobar, .-call_foobar
+.popsection
+", sym foobar);
 
 fn foobar() {}
 
diff --git a/tests/ui/associated-consts/defaults-not-assumed-fail.stderr b/tests/ui/associated-consts/defaults-not-assumed-fail.stderr
index d659912341a..ac5ec8e05ea 100644
--- a/tests/ui/associated-consts/defaults-not-assumed-fail.stderr
+++ b/tests/ui/associated-consts/defaults-not-assumed-fail.stderr
@@ -24,6 +24,7 @@ note: erroneous constant encountered
 LL |     assert_eq!(<() as Tr>::B, 0);    // causes the error above
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this note originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
diff --git a/tests/ui/associated-consts/issue-105330.stderr b/tests/ui/associated-consts/issue-105330.stderr
index 927422fa8dc..200856caa25 100644
--- a/tests/ui/associated-consts/issue-105330.stderr
+++ b/tests/ui/associated-consts/issue-105330.stderr
@@ -33,7 +33,7 @@ LL | fn main<A: TraitWAssocConst<A=32>>() {
    = note: see issue #92827 <https://github.com/rust-lang/rust/issues/92827> for more information
    = help: add `#![feature(associated_const_equality)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in impl headers
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in impl headers
   --> $DIR/issue-105330.rs:6:27
    |
 LL | impl TraitWAssocConst for impl Demo {
diff --git a/tests/ui/associated-inherent-types/issue-109789.stderr b/tests/ui/associated-inherent-types/issue-109789.stderr
index 84fc85cd09e..e844f6795e6 100644
--- a/tests/ui/associated-inherent-types/issue-109789.stderr
+++ b/tests/ui/associated-inherent-types/issue-109789.stderr
@@ -15,6 +15,7 @@ LL | fn bar(_: Foo<for<'a> fn(&'a ())>::Assoc) {}
    |
    = note: expected struct `Foo<fn(&'static ())>`
               found struct `Foo<for<'a> fn(&'a ())>`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/associated-type-bounds/duplicate.stderr b/tests/ui/associated-type-bounds/duplicate.stderr
index 08721eff7b0..3629aa4fcea 100644
--- a/tests/ui/associated-type-bounds/duplicate.stderr
+++ b/tests/ui/associated-type-bounds/duplicate.stderr
@@ -373,6 +373,8 @@ LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
    |                      |
    |                      `Item` bound here first
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
   --> $DIR/duplicate.rs:197:34
@@ -389,6 +391,8 @@ LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
    |                      |
    |                      `Item` bound here first
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
   --> $DIR/duplicate.rs:200:37
@@ -405,6 +409,8 @@ LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
    |                      -------------  ^^^^^^^^^^^^^ re-bound here
    |                      |
    |                      `Item` bound here first
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
   --> $DIR/duplicate.rs:205:29
@@ -445,6 +451,8 @@ LL |     Self: Iterator<Item: Copy, Item: Send>,
    |                    ----------  ^^^^^^^^^^ re-bound here
    |                    |
    |                    `Item` bound here first
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
   --> $DIR/duplicate.rs:230:32
@@ -461,6 +469,8 @@ LL |     Self: Iterator<Item: Copy, Item: Copy>,
    |                    ----------  ^^^^^^^^^^ re-bound here
    |                    |
    |                    `Item` bound here first
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
   --> $DIR/duplicate.rs:237:35
@@ -477,6 +487,8 @@ LL |     Self: Iterator<Item: 'static, Item: 'static>,
    |                    -------------  ^^^^^^^^^^^^^ re-bound here
    |                    |
    |                    `Item` bound here first
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
   --> $DIR/duplicate.rs:255:40
diff --git a/tests/ui/associated-type-bounds/issue-71443-1.stderr b/tests/ui/associated-type-bounds/issue-71443-1.stderr
index 15cc9646b2c..09c8ec2e289 100644
--- a/tests/ui/associated-type-bounds/issue-71443-1.stderr
+++ b/tests/ui/associated-type-bounds/issue-71443-1.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-71443-1.rs:6:5
    |
 LL | fn hello<F: for<'a> Iterator<Item: 'a>>() {
-   |                                           - help: try adding a return type: `-> Incorrect`
+   |                                          - help: try adding a return type: `-> Incorrect`
 LL |     Incorrect
    |     ^^^^^^^^^ expected `()`, found `Incorrect`
 
diff --git a/tests/ui/associated-types/hr-associated-type-bound-param-2.stderr b/tests/ui/associated-types/hr-associated-type-bound-param-2.stderr
index 366670269d7..1a749007ab6 100644
--- a/tests/ui/associated-types/hr-associated-type-bound-param-2.stderr
+++ b/tests/ui/associated-types/hr-associated-type-bound-param-2.stderr
@@ -45,6 +45,7 @@ LL | trait Z<'a, T: ?Sized>
 ...
 LL |     for<'b> <T as Z<'b, u16>>::W: Clone,
    |                                   ^^^^^ required by this bound in `Z`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/async-await/async-await-let-else.stderr b/tests/ui/async-await/async-await-let-else.stderr
index 9a1c1782233..c3b4e761824 100644
--- a/tests/ui/async-await/async-await-let-else.stderr
+++ b/tests/ui/async-await/async-await-let-else.stderr
@@ -22,7 +22,7 @@ error[E0277]: `Rc<()>` cannot be sent between threads safely
   --> $DIR/async-await-let-else.rs:47:13
    |
 LL | async fn foo2(x: Option<bool>) {
-   |                                - within this `impl Future<Output = ()>`
+   | ------------------------------ within this `impl Future<Output = ()>`
 ...
 LL |     is_send(foo2(Some(true)));
    |     ------- ^^^^^^^^^^^^^^^^ `Rc<()>` cannot be sent between threads safely
diff --git a/tests/ui/async-await/drop-tracking-unresolved-typeck-results.stderr b/tests/ui/async-await/drop-tracking-unresolved-typeck-results.stderr
index cfb0ebe38b6..0d3ee8a9377 100644
--- a/tests/ui/async-await/drop-tracking-unresolved-typeck-results.stderr
+++ b/tests/ui/async-await/drop-tracking-unresolved-typeck-results.stderr
@@ -23,6 +23,7 @@ LL | |     });
    |
    = note: `fn(&'0 ()) -> std::future::Ready<&'0 ()> {std::future::ready::<&'0 ()>}` must implement `FnOnce<(&'1 (),)>`, for any two lifetimes `'0` and `'1`...
    = note: ...but it actually implements `FnOnce<(&(),)>`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/async-await/in-trait/async-associated-types.rs b/tests/ui/async-await/in-trait/async-associated-types.rs
index 3e2739a164f..14f18811c1e 100644
--- a/tests/ui/async-await/in-trait/async-associated-types.rs
+++ b/tests/ui/async-await/in-trait/async-associated-types.rs
@@ -9,12 +9,14 @@ use std::fmt::Debug;
 trait MyTrait<'a, 'b, T> where Self: 'a, T: Debug + Sized + 'b {
     type MyAssoc;
 
+    #[allow(async_fn_in_trait)]
     async fn foo(&'a self, key: &'b T) -> Self::MyAssoc;
 }
 
 impl<'a, 'b, T: Debug + Sized + 'b, U: 'a> MyTrait<'a, 'b, T> for U {
     type MyAssoc = (&'a U, &'b T);
 
+    #[allow(async_fn_in_trait)]
     async fn foo(&'a self, key: &'b T) -> (&'a U, &'b T) {
         (self, key)
     }
diff --git a/tests/ui/async-await/in-trait/async-default-fn-overridden.rs b/tests/ui/async-await/in-trait/async-default-fn-overridden.rs
index 06413fe6f82..8143f0bca03 100644
--- a/tests/ui/async-await/in-trait/async-default-fn-overridden.rs
+++ b/tests/ui/async-await/in-trait/async-default-fn-overridden.rs
@@ -6,10 +6,12 @@
 use std::future::Future;
 
 trait AsyncTrait {
+    #[allow(async_fn_in_trait)]
     async fn default_impl() {
         assert!(false);
     }
 
+    #[allow(async_fn_in_trait)]
     async fn call_default_impl() {
         Self::default_impl().await
     }
diff --git a/tests/ui/async-await/in-trait/async-example-desugared-boxed-in-trait.stderr b/tests/ui/async-await/in-trait/async-example-desugared-boxed-in-trait.stderr
index 168ef8e9ee4..3f1f1766eb5 100644
--- a/tests/ui/async-await/in-trait/async-example-desugared-boxed-in-trait.stderr
+++ b/tests/ui/async-await/in-trait/async-example-desugared-boxed-in-trait.stderr
@@ -1,8 +1,8 @@
 error[E0053]: method `foo` has an incompatible type for trait
-  --> $DIR/async-example-desugared-boxed-in-trait.rs:15:28
+  --> $DIR/async-example-desugared-boxed-in-trait.rs:15:5
    |
 LL |     async fn foo(&self) -> i32 {
-   |                            ^^^ expected `Pin<Box<dyn Future<Output = i32>>>`, found future
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Pin<Box<dyn Future<Output = i32>>>`, found future
    |
 note: type in trait
   --> $DIR/async-example-desugared-boxed-in-trait.rs:11:22
diff --git a/tests/ui/async-await/in-trait/async-example-desugared-extra.rs b/tests/ui/async-await/in-trait/async-example-desugared-extra.rs
index 3505690f1ec..5d5aa817b4c 100644
--- a/tests/ui/async-await/in-trait/async-example-desugared-extra.rs
+++ b/tests/ui/async-await/in-trait/async-example-desugared-extra.rs
@@ -10,6 +10,7 @@ use std::pin::Pin;
 use std::task::Poll;
 
 pub trait MyTrait {
+    #[allow(async_fn_in_trait)]
     async fn foo(&self) -> i32;
 }
 
diff --git a/tests/ui/async-await/in-trait/async-example-desugared.rs b/tests/ui/async-await/in-trait/async-example-desugared.rs
index 0a5023176fe..7987645c97b 100644
--- a/tests/ui/async-await/in-trait/async-example-desugared.rs
+++ b/tests/ui/async-await/in-trait/async-example-desugared.rs
@@ -8,6 +8,7 @@
 use std::future::Future;
 
 trait MyTrait {
+    #[allow(async_fn_in_trait)]
     async fn foo(&self) -> i32;
 }
 
diff --git a/tests/ui/async-await/in-trait/async-example.rs b/tests/ui/async-await/in-trait/async-example.rs
index abf94ef7450..8c80c21eabe 100644
--- a/tests/ui/async-await/in-trait/async-example.rs
+++ b/tests/ui/async-await/in-trait/async-example.rs
@@ -5,7 +5,10 @@
 #![allow(incomplete_features)]
 
 trait MyTrait {
+    #[allow(async_fn_in_trait)]
     async fn foo(&self) -> i32;
+
+    #[allow(async_fn_in_trait)]
     async fn bar(&self) -> i32;
 }
 
diff --git a/tests/ui/async-await/in-trait/async-generics-and-bounds.stderr b/tests/ui/async-await/in-trait/async-generics-and-bounds.stderr
index 5c8d64fc6cb..90b40e221e4 100644
--- a/tests/ui/async-await/in-trait/async-generics-and-bounds.stderr
+++ b/tests/ui/async-await/in-trait/async-generics-and-bounds.stderr
@@ -1,8 +1,8 @@
 error[E0311]: the parameter type `U` may not live long enough
-  --> $DIR/async-generics-and-bounds.rs:12:28
+  --> $DIR/async-generics-and-bounds.rs:12:5
    |
 LL |     async fn foo(&self) -> &(T, U) where T: Debug + Sized, U: Hash;
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: the parameter type `U` must be valid for the anonymous lifetime as defined here...
   --> $DIR/async-generics-and-bounds.rs:12:18
@@ -10,16 +10,16 @@ note: the parameter type `U` must be valid for the anonymous lifetime as defined
 LL |     async fn foo(&self) -> &(T, U) where T: Debug + Sized, U: Hash;
    |                  ^
 note: ...so that the reference type `&(T, U)` does not outlive the data it points at
-  --> $DIR/async-generics-and-bounds.rs:12:28
+  --> $DIR/async-generics-and-bounds.rs:12:5
    |
 LL |     async fn foo(&self) -> &(T, U) where T: Debug + Sized, U: Hash;
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0311]: the parameter type `T` may not live long enough
-  --> $DIR/async-generics-and-bounds.rs:12:28
+  --> $DIR/async-generics-and-bounds.rs:12:5
    |
 LL |     async fn foo(&self) -> &(T, U) where T: Debug + Sized, U: Hash;
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: the parameter type `T` must be valid for the anonymous lifetime as defined here...
   --> $DIR/async-generics-and-bounds.rs:12:18
@@ -27,10 +27,10 @@ note: the parameter type `T` must be valid for the anonymous lifetime as defined
 LL |     async fn foo(&self) -> &(T, U) where T: Debug + Sized, U: Hash;
    |                  ^
 note: ...so that the reference type `&(T, U)` does not outlive the data it points at
-  --> $DIR/async-generics-and-bounds.rs:12:28
+  --> $DIR/async-generics-and-bounds.rs:12:5
    |
 LL |     async fn foo(&self) -> &(T, U) where T: Debug + Sized, U: Hash;
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/async-await/in-trait/async-generics.stderr b/tests/ui/async-await/in-trait/async-generics.stderr
index 6ae73d9e3a6..07f986e94e0 100644
--- a/tests/ui/async-await/in-trait/async-generics.stderr
+++ b/tests/ui/async-await/in-trait/async-generics.stderr
@@ -1,8 +1,8 @@
 error[E0311]: the parameter type `U` may not live long enough
-  --> $DIR/async-generics.rs:9:28
+  --> $DIR/async-generics.rs:9:5
    |
 LL |     async fn foo(&self) -> &(T, U);
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: the parameter type `U` must be valid for the anonymous lifetime as defined here...
   --> $DIR/async-generics.rs:9:18
@@ -10,16 +10,16 @@ note: the parameter type `U` must be valid for the anonymous lifetime as defined
 LL |     async fn foo(&self) -> &(T, U);
    |                  ^
 note: ...so that the reference type `&(T, U)` does not outlive the data it points at
-  --> $DIR/async-generics.rs:9:28
+  --> $DIR/async-generics.rs:9:5
    |
 LL |     async fn foo(&self) -> &(T, U);
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0311]: the parameter type `T` may not live long enough
-  --> $DIR/async-generics.rs:9:28
+  --> $DIR/async-generics.rs:9:5
    |
 LL |     async fn foo(&self) -> &(T, U);
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: the parameter type `T` must be valid for the anonymous lifetime as defined here...
   --> $DIR/async-generics.rs:9:18
@@ -27,10 +27,10 @@ note: the parameter type `T` must be valid for the anonymous lifetime as defined
 LL |     async fn foo(&self) -> &(T, U);
    |                  ^
 note: ...so that the reference type `&(T, U)` does not outlive the data it points at
-  --> $DIR/async-generics.rs:9:28
+  --> $DIR/async-generics.rs:9:5
    |
 LL |     async fn foo(&self) -> &(T, U);
-   |                            ^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/async-await/in-trait/async-lifetimes-and-bounds.rs b/tests/ui/async-await/in-trait/async-lifetimes-and-bounds.rs
index d5481d277e4..96cda4e35da 100644
--- a/tests/ui/async-await/in-trait/async-lifetimes-and-bounds.rs
+++ b/tests/ui/async-await/in-trait/async-lifetimes-and-bounds.rs
@@ -7,6 +7,7 @@
 use std::fmt::Debug;
 
 trait MyTrait<'a, 'b, T> {
+    #[allow(async_fn_in_trait)]
     async fn foo(&'a self, key: &'b T) -> (&'a Self, &'b T) where T: Debug + Sized;
 }
 
diff --git a/tests/ui/async-await/in-trait/async-lifetimes.rs b/tests/ui/async-await/in-trait/async-lifetimes.rs
index f298e45d239..4b0264bc8d0 100644
--- a/tests/ui/async-await/in-trait/async-lifetimes.rs
+++ b/tests/ui/async-await/in-trait/async-lifetimes.rs
@@ -5,6 +5,7 @@
 #![allow(incomplete_features)]
 
 trait MyTrait<'a, 'b, T> {
+    #[allow(async_fn_in_trait)]
     async fn foo(&'a self, key: &'b T) -> (&'a Self, &'b T);
 }
 
diff --git a/tests/ui/async-await/in-trait/async-recursive-generic.stderr b/tests/ui/async-await/in-trait/async-recursive-generic.stderr
index cab173bdd5b..6897bf1c999 100644
--- a/tests/ui/async-await/in-trait/async-recursive-generic.stderr
+++ b/tests/ui/async-await/in-trait/async-recursive-generic.stderr
@@ -1,8 +1,8 @@
 error[E0733]: recursion in an `async fn` requires boxing
-  --> $DIR/async-recursive-generic.rs:11:48
+  --> $DIR/async-recursive-generic.rs:11:5
    |
 LL |     async fn foo_recursive(&self, n: usize) -> T {
-   |                                                ^ recursive `async fn`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ recursive `async fn`
    |
    = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future`
    = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion
diff --git a/tests/ui/async-await/in-trait/async-recursive.stderr b/tests/ui/async-await/in-trait/async-recursive.stderr
index 9feff37b3fe..c9b4784e3b4 100644
--- a/tests/ui/async-await/in-trait/async-recursive.stderr
+++ b/tests/ui/async-await/in-trait/async-recursive.stderr
@@ -1,8 +1,8 @@
 error[E0733]: recursion in an `async fn` requires boxing
-  --> $DIR/async-recursive.rs:11:48
+  --> $DIR/async-recursive.rs:11:5
    |
 LL |     async fn foo_recursive(&self, n: usize) -> i32 {
-   |                                                ^^^ recursive `async fn`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ recursive `async fn`
    |
    = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future`
    = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion
diff --git a/tests/ui/async-await/in-trait/dont-project-to-specializable-projection.stderr b/tests/ui/async-await/in-trait/dont-project-to-specializable-projection.stderr
index 7c750bf5101..4ba6d4cba0c 100644
--- a/tests/ui/async-await/in-trait/dont-project-to-specializable-projection.stderr
+++ b/tests/ui/async-await/in-trait/dont-project-to-specializable-projection.stderr
@@ -1,14 +1,14 @@
 error[E0053]: method `foo` has an incompatible type for trait
-  --> $DIR/dont-project-to-specializable-projection.rs:14:35
+  --> $DIR/dont-project-to-specializable-projection.rs:14:5
    |
 LL |     default async fn foo(_: T) -> &'static str {
-   |                                   ^^^^^^^^^^^^ expected associated type, found future
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected associated type, found future
    |
 note: type in trait
-  --> $DIR/dont-project-to-specializable-projection.rs:10:27
+  --> $DIR/dont-project-to-specializable-projection.rs:10:5
    |
 LL |     async fn foo(_: T) -> &'static str;
-   |                           ^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: expected signature `fn(_) -> impl Future<Output = &'static str>`
               found signature `fn(_) -> impl Future<Output = &'static str>`
 
diff --git a/tests/ui/async-await/in-trait/early-bound-1.rs b/tests/ui/async-await/in-trait/early-bound-1.rs
index 6b3b142014b..bc410cc2954 100644
--- a/tests/ui/async-await/in-trait/early-bound-1.rs
+++ b/tests/ui/async-await/in-trait/early-bound-1.rs
@@ -5,6 +5,7 @@
 #![allow(incomplete_features)]
 
 pub trait Foo {
+    #[allow(async_fn_in_trait)]
     async fn foo(&mut self);
 }
 
diff --git a/tests/ui/async-await/in-trait/early-bound-2.rs b/tests/ui/async-await/in-trait/early-bound-2.rs
index 270443229b0..1974b1d9f7a 100644
--- a/tests/ui/async-await/in-trait/early-bound-2.rs
+++ b/tests/ui/async-await/in-trait/early-bound-2.rs
@@ -5,6 +5,7 @@
 #![allow(incomplete_features)]
 
 pub trait Foo {
+    #[allow(async_fn_in_trait)]
     async fn foo(&mut self);
 }
 
diff --git a/tests/ui/async-await/in-trait/fn-not-async-err2.rs b/tests/ui/async-await/in-trait/fn-not-async-err2.rs
index 78017429f73..e1703415dbd 100644
--- a/tests/ui/async-await/in-trait/fn-not-async-err2.rs
+++ b/tests/ui/async-await/in-trait/fn-not-async-err2.rs
@@ -11,7 +11,7 @@ trait MyTrait {
 
 impl MyTrait for i32 {
     fn foo(&self) -> impl Future<Output = i32> {
-        //~^ ERROR `impl Trait` only allowed in function and inherent method return types, not in `impl` method return types
+        //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types, not in `impl` method return types
         async { *self }
     }
 }
diff --git a/tests/ui/async-await/in-trait/fn-not-async-err2.stderr b/tests/ui/async-await/in-trait/fn-not-async-err2.stderr
index 37d9669c012..a7c897f786e 100644
--- a/tests/ui/async-await/in-trait/fn-not-async-err2.stderr
+++ b/tests/ui/async-await/in-trait/fn-not-async-err2.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `impl` method return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `impl` method return types
   --> $DIR/fn-not-async-err2.rs:13:22
    |
 LL |     fn foo(&self) -> impl Future<Output = i32> {
diff --git a/tests/ui/async-await/in-trait/implied-bounds.rs b/tests/ui/async-await/in-trait/implied-bounds.rs
index 52bceb3cc5c..40eebad86c2 100644
--- a/tests/ui/async-await/in-trait/implied-bounds.rs
+++ b/tests/ui/async-await/in-trait/implied-bounds.rs
@@ -7,6 +7,8 @@
 trait TcpStack {
     type Connection<'a>: Sized where Self: 'a;
     fn connect<'a>(&'a self) -> Self::Connection<'a>;
+
+    #[allow(async_fn_in_trait)]
     async fn async_connect<'a>(&'a self) -> Self::Connection<'a>;
 }
 
diff --git a/tests/ui/async-await/in-trait/issue-102138.rs b/tests/ui/async-await/in-trait/issue-102138.rs
index f61b34ed99e..3d9cef0210f 100644
--- a/tests/ui/async-await/in-trait/issue-102138.rs
+++ b/tests/ui/async-await/in-trait/issue-102138.rs
@@ -10,6 +10,8 @@ async fn yield_now() {}
 
 trait AsyncIterator {
     type Item;
+
+    #[allow(async_fn_in_trait)]
     async fn next(&mut self) -> Option<Self::Item>;
 }
 
diff --git a/tests/ui/async-await/in-trait/issue-102219.rs b/tests/ui/async-await/in-trait/issue-102219.rs
index 9a35f6515cb..4a23e4be4f7 100644
--- a/tests/ui/async-await/in-trait/issue-102219.rs
+++ b/tests/ui/async-await/in-trait/issue-102219.rs
@@ -6,5 +6,6 @@
 #![allow(incomplete_features)]
 
 trait T {
+    #[allow(async_fn_in_trait)]
     async fn foo();
 }
diff --git a/tests/ui/async-await/in-trait/issue-102310.rs b/tests/ui/async-await/in-trait/issue-102310.rs
index 49c3e9feeb4..327d432a6a6 100644
--- a/tests/ui/async-await/in-trait/issue-102310.rs
+++ b/tests/ui/async-await/in-trait/issue-102310.rs
@@ -5,6 +5,7 @@
 #![allow(incomplete_features)]
 
 pub trait SpiDevice {
+    #[allow(async_fn_in_trait)]
     async fn transaction<F, R>(&mut self);
 }
 
diff --git a/tests/ui/async-await/in-trait/issue-104678.rs b/tests/ui/async-await/in-trait/issue-104678.rs
index e396df4e5d1..0a334707505 100644
--- a/tests/ui/async-await/in-trait/issue-104678.rs
+++ b/tests/ui/async-await/in-trait/issue-104678.rs
@@ -8,6 +8,7 @@ use std::future::Future;
 pub trait Pool {
     type Conn;
 
+    #[allow(async_fn_in_trait)]
     async fn async_callback<'a, F: FnOnce(&'a Self::Conn) -> Fut, Fut: Future<Output = ()>>(
         &'a self,
         callback: F,
diff --git a/tests/ui/async-await/in-trait/missing-feature-flag.stderr b/tests/ui/async-await/in-trait/missing-feature-flag.stderr
index f6aba1fcdbf..87a7e85bfbb 100644
--- a/tests/ui/async-await/in-trait/missing-feature-flag.stderr
+++ b/tests/ui/async-await/in-trait/missing-feature-flag.stderr
@@ -7,6 +7,12 @@ LL |     async fn foo(_: T) -> &'static str;
 LL | impl<T> MyTrait<T> for MyStruct {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `foo` in implementation
 
+error[E0308]: mismatched types
+  --> $DIR/missing-feature-flag.rs:16:42
+   |
+LL |     async fn foo(_: i32) -> &'static str {}
+   |                                          ^^ expected `&str`, found `()`
+
 error[E0520]: `foo` specializes an item from a parent `impl`, but that item is not marked `default`
   --> $DIR/missing-feature-flag.rs:16:5
    |
@@ -18,12 +24,6 @@ LL |     async fn foo(_: i32) -> &'static str {}
    |
    = note: to specialize, `foo` in the parent `impl` must be marked `default`
 
-error[E0308]: mismatched types
-  --> $DIR/missing-feature-flag.rs:16:42
-   |
-LL |     async fn foo(_: i32) -> &'static str {}
-   |                                          ^^ expected `&str`, found `()`
-
 error: aborting due to 3 previous errors
 
 Some errors have detailed explanations: E0046, E0308, E0520.
diff --git a/tests/ui/async-await/in-trait/nested-rpit.rs b/tests/ui/async-await/in-trait/nested-rpit.rs
index 9cdc23bbc78..8c43e1b07e2 100644
--- a/tests/ui/async-await/in-trait/nested-rpit.rs
+++ b/tests/ui/async-await/in-trait/nested-rpit.rs
@@ -9,6 +9,7 @@ use std::future::Future;
 use std::marker::PhantomData;
 
 trait Lockable<K, V> {
+    #[allow(async_fn_in_trait)]
     async fn lock_all_entries(&self) -> impl Future<Output = Guard<'_>>;
 }
 
diff --git a/tests/ui/async-await/in-trait/normalize-opaque-with-bound-vars.rs b/tests/ui/async-await/in-trait/normalize-opaque-with-bound-vars.rs
index c4008f2b7e7..f8fe0d1bde8 100644
--- a/tests/ui/async-await/in-trait/normalize-opaque-with-bound-vars.rs
+++ b/tests/ui/async-await/in-trait/normalize-opaque-with-bound-vars.rs
@@ -11,6 +11,7 @@
 pub struct SharedState {}
 
 pub trait State {
+    #[allow(async_fn_in_trait)]
     async fn execute(self, shared_state: &SharedState);
 }
 
diff --git a/tests/ui/async-await/in-trait/warn.rs b/tests/ui/async-await/in-trait/warn.rs
new file mode 100644
index 00000000000..4f981c31f5c
--- /dev/null
+++ b/tests/ui/async-await/in-trait/warn.rs
@@ -0,0 +1,23 @@
+// edition: 2021
+
+#![feature(async_fn_in_trait)]
+#![deny(async_fn_in_trait)]
+
+pub trait Foo {
+    async fn not_send();
+    //~^ ERROR  use of `async fn` in public traits is discouraged
+}
+
+mod private {
+    pub trait FooUnreachable {
+        async fn not_send();
+        // No warning
+    }
+}
+
+pub(crate) trait FooCrate {
+    async fn not_send();
+    // No warning
+}
+
+fn main() {}
diff --git a/tests/ui/async-await/in-trait/warn.stderr b/tests/ui/async-await/in-trait/warn.stderr
new file mode 100644
index 00000000000..eac41a6e924
--- /dev/null
+++ b/tests/ui/async-await/in-trait/warn.stderr
@@ -0,0 +1,20 @@
+error: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
+  --> $DIR/warn.rs:7:5
+   |
+LL |     async fn not_send();
+   |     ^^^^^
+   |
+   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
+note: the lint level is defined here
+  --> $DIR/warn.rs:4:9
+   |
+LL | #![deny(async_fn_in_trait)]
+   |         ^^^^^^^^^^^^^^^^^
+help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`
+   |
+LL -     async fn not_send();
+LL +     fn not_send() -> impl std::future::Future<Output = ()> + Send;
+   |
+
+error: aborting due to previous error
+
diff --git a/tests/ui/async-await/issue-108572.fixed b/tests/ui/async-await/issue-108572.fixed
new file mode 100644
index 00000000000..8f0133d97b5
--- /dev/null
+++ b/tests/ui/async-await/issue-108572.fixed
@@ -0,0 +1,16 @@
+// edition: 2021
+// run-rustfix
+#![allow(unused_must_use, dead_code)]
+
+use std::future::Future;
+fn foo() -> impl Future<Output=()> {
+    async { }
+}
+
+fn bar(cx: &mut std::task::Context<'_>) {
+    let fut = foo();
+    let mut pinned = std::pin::pin!(fut);
+    pinned.as_mut().poll(cx);
+    //~^ ERROR no method named `poll` found for opaque type `impl Future<Output = ()>` in the current scope [E0599]
+}
+fn main() {}
diff --git a/tests/ui/async-await/issue-108572.rs b/tests/ui/async-await/issue-108572.rs
index efcb8b8ebab..3596580763c 100644
--- a/tests/ui/async-await/issue-108572.rs
+++ b/tests/ui/async-await/issue-108572.rs
@@ -1,12 +1,15 @@
 // edition: 2021
+// run-rustfix
+#![allow(unused_must_use, dead_code)]
 
 use std::future::Future;
 fn foo() -> impl Future<Output=()> {
     async { }
 }
 
-fn main() {
+fn bar(cx: &mut std::task::Context<'_>) {
     let fut = foo();
-    fut.poll();
+    fut.poll(cx);
     //~^ ERROR no method named `poll` found for opaque type `impl Future<Output = ()>` in the current scope [E0599]
 }
+fn main() {}
diff --git a/tests/ui/async-await/issue-108572.stderr b/tests/ui/async-await/issue-108572.stderr
index 0dbcf4d660a..588669092b0 100644
--- a/tests/ui/async-await/issue-108572.stderr
+++ b/tests/ui/async-await/issue-108572.stderr
@@ -1,11 +1,16 @@
 error[E0599]: no method named `poll` found for opaque type `impl Future<Output = ()>` in the current scope
-  --> $DIR/issue-108572.rs:10:9
+  --> $DIR/issue-108572.rs:12:9
    |
-LL |     fut.poll();
+LL |     fut.poll(cx);
    |         ^^^^ method not found in `impl Future<Output = ()>`
    |
    = help: method `poll` found on `Pin<&mut impl Future<Output = ()>>`, see documentation for `std::pin::Pin`
    = help: self type must be pinned to call `Future::poll`, see https://rust-lang.github.io/async-book/04_pinning/01_chapter.html#pinning-in-practice
+help: consider pinning the expression
+   |
+LL ~     let mut pinned = std::pin::pin!(fut);
+LL ~     pinned.as_mut().poll(cx);
+   |
 
 error: aborting due to previous error
 
diff --git a/tests/ui/async-await/issue-64130-3-other.stderr b/tests/ui/async-await/issue-64130-3-other.stderr
index 573da1034c5..4bbb7731b11 100644
--- a/tests/ui/async-await/issue-64130-3-other.stderr
+++ b/tests/ui/async-await/issue-64130-3-other.stderr
@@ -2,7 +2,7 @@ error[E0277]: the trait bound `Foo: Qux` is not satisfied in `impl Future<Output
   --> $DIR/issue-64130-3-other.rs:25:12
    |
 LL | async fn bar() {
-   |                - within this `impl Future<Output = ()>`
+   | -------------- within this `impl Future<Output = ()>`
 ...
 LL |     is_qux(bar());
    |            ^^^^^ within `impl Future<Output = ()>`, the trait `Qux` is not implemented for `Foo`
diff --git a/tests/ui/async-await/issues/issue-67893.stderr b/tests/ui/async-await/issues/issue-67893.stderr
index f36269e8f36..3d6d1fb5c09 100644
--- a/tests/ui/async-await/issues/issue-67893.stderr
+++ b/tests/ui/async-await/issues/issue-67893.stderr
@@ -6,10 +6,10 @@ LL |     g(issue_67893::run())
    |     |
    |     required by a bound introduced by this call
    |
-  ::: $DIR/auxiliary/issue_67893.rs:9:20
+  ::: $DIR/auxiliary/issue_67893.rs:9:1
    |
 LL | pub async fn run() {
-   |                    - within this `impl Future<Output = ()>`
+   | ------------------ within this `impl Future<Output = ()>`
    |
    = help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `MutexGuard<'_, ()>`
    = note: required because it captures the following types: `Arc<Mutex<()>>`, `MutexGuard<'_, ()>`, `impl Future<Output = ()>`
diff --git a/tests/ui/async-await/mutually-recursive-async-impl-trait-type.stderr b/tests/ui/async-await/mutually-recursive-async-impl-trait-type.stderr
index f789ad2a05c..9442609e805 100644
--- a/tests/ui/async-await/mutually-recursive-async-impl-trait-type.stderr
+++ b/tests/ui/async-await/mutually-recursive-async-impl-trait-type.stderr
@@ -1,17 +1,17 @@
 error[E0733]: recursion in an `async fn` requires boxing
-  --> $DIR/mutually-recursive-async-impl-trait-type.rs:5:18
+  --> $DIR/mutually-recursive-async-impl-trait-type.rs:5:1
    |
 LL | async fn rec_1() {
-   |                  ^ recursive `async fn`
+   | ^^^^^^^^^^^^^^^^ recursive `async fn`
    |
    = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future`
    = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion
 
 error[E0733]: recursion in an `async fn` requires boxing
-  --> $DIR/mutually-recursive-async-impl-trait-type.rs:9:18
+  --> $DIR/mutually-recursive-async-impl-trait-type.rs:9:1
    |
 LL | async fn rec_2() {
-   |                  ^ recursive `async fn`
+   | ^^^^^^^^^^^^^^^^ recursive `async fn`
    |
    = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future`
    = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion
diff --git a/tests/ui/async-await/partial-drop-partial-reinit.stderr b/tests/ui/async-await/partial-drop-partial-reinit.stderr
index 85e1830c78e..d115c1b1cc4 100644
--- a/tests/ui/async-await/partial-drop-partial-reinit.stderr
+++ b/tests/ui/async-await/partial-drop-partial-reinit.stderr
@@ -7,7 +7,7 @@ LL |     gimme_send(foo());
    |     required by a bound introduced by this call
 ...
 LL | async fn foo() {
-   |                - within this `impl Future<Output = ()>`
+   | -------------- within this `impl Future<Output = ()>`
    |
    = help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `NotSend`
    = note: required because it appears within the type `(NotSend,)`
diff --git a/tests/ui/async-await/pin-needed-to-poll.stderr b/tests/ui/async-await/pin-needed-to-poll.stderr
index b1f4a73aafe..964709daeda 100644
--- a/tests/ui/async-await/pin-needed-to-poll.stderr
+++ b/tests/ui/async-await/pin-needed-to-poll.stderr
@@ -6,14 +6,12 @@ LL | struct Sleep;
 ...
 LL |         self.sleep.poll(cx)
    |                    ^^^^ method not found in `Sleep`
-  --> $SRC_DIR/core/src/future/future.rs:LL:COL
    |
-   = note: the method is available for `Pin<&mut Sleep>` here
+help: consider pinning the expression
    |
-help: consider wrapping the receiver expression with the appropriate type
+LL ~         let mut pinned = std::pin::pin!(self.sleep);
+LL ~         pinned.as_mut().poll(cx)
    |
-LL |         Pin::new(&mut self.sleep).poll(cx)
-   |         +++++++++++++           +
 
 error: aborting due to previous error
 
diff --git a/tests/ui/async-await/recursive-async-impl-trait-type.stderr b/tests/ui/async-await/recursive-async-impl-trait-type.stderr
index 63f64f44557..64917329c49 100644
--- a/tests/ui/async-await/recursive-async-impl-trait-type.stderr
+++ b/tests/ui/async-await/recursive-async-impl-trait-type.stderr
@@ -1,8 +1,8 @@
 error[E0733]: recursion in an `async fn` requires boxing
-  --> $DIR/recursive-async-impl-trait-type.rs:5:40
+  --> $DIR/recursive-async-impl-trait-type.rs:5:1
    |
 LL | async fn recursive_async_function() -> () {
-   |                                        ^^ recursive `async fn`
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ recursive `async fn`
    |
    = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future`
    = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion
diff --git a/tests/ui/async-await/return-type-notation/issue-110963-early.stderr b/tests/ui/async-await/return-type-notation/issue-110963-early.stderr
index 969094a2c58..98e3cbd0d7f 100644
--- a/tests/ui/async-await/return-type-notation/issue-110963-early.stderr
+++ b/tests/ui/async-await/return-type-notation/issue-110963-early.stderr
@@ -44,6 +44,7 @@ note: the lifetime requirement is introduced here
    |
 LL |     F: Future + Send + 'static,
    |                 ^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors; 1 warning emitted
 
diff --git a/tests/ui/auto-traits/pre-cfg.rs b/tests/ui/auto-traits/pre-cfg.rs
new file mode 100644
index 00000000000..e6e840dcbab
--- /dev/null
+++ b/tests/ui/auto-traits/pre-cfg.rs
@@ -0,0 +1,8 @@
+// check-pass
+
+#[cfg(FALSE)]
+auto trait Foo {}
+//~^ WARN `auto` traits are unstable
+//~| WARN unstable syntax can change at any point in the future, causing a hard error!
+
+fn main() {}
diff --git a/tests/ui/auto-traits/pre-cfg.stderr b/tests/ui/auto-traits/pre-cfg.stderr
new file mode 100644
index 00000000000..6efa05b4326
--- /dev/null
+++ b/tests/ui/auto-traits/pre-cfg.stderr
@@ -0,0 +1,13 @@
+warning: `auto` traits are unstable
+  --> $DIR/pre-cfg.rs:4:1
+   |
+LL | auto trait Foo {}
+   | ^^^^
+   |
+   = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
+   = help: add `#![feature(auto_traits)]` to the crate attributes to enable
+   = warning: unstable syntax can change at any point in the future, causing a hard error!
+   = note: for more information, see issue #65860 <https://github.com/rust-lang/rust/issues/65860>
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/block-result/block-must-not-have-result-res.stderr b/tests/ui/block-result/block-must-not-have-result-res.stderr
index 0080d06dd20..b7427462bcb 100644
--- a/tests/ui/block-result/block-must-not-have-result-res.stderr
+++ b/tests/ui/block-result/block-must-not-have-result-res.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/block-must-not-have-result-res.rs:5:9
    |
 LL |     fn drop(&mut self) {
-   |                        - expected `()` because of default return type
+   |                       - expected `()` because of default return type
 LL |         true
    |         ^^^^ expected `()`, found `bool`
 
diff --git a/tests/ui/block-result/issue-20862.stderr b/tests/ui/block-result/issue-20862.stderr
index 17b524fe311..1df3a683620 100644
--- a/tests/ui/block-result/issue-20862.stderr
+++ b/tests/ui/block-result/issue-20862.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-20862.rs:2:5
    |
 LL | fn foo(x: i32) {
-   |                - help: a return type might be missing here: `-> _`
+   |               - help: a return type might be missing here: `-> _`
 LL |     |y| x + y
    |     ^^^^^^^^^ expected `()`, found closure
    |
diff --git a/tests/ui/block-result/issue-22645.stderr b/tests/ui/block-result/issue-22645.stderr
index 677b40aaa9d..1064848f513 100644
--- a/tests/ui/block-result/issue-22645.stderr
+++ b/tests/ui/block-result/issue-22645.stderr
@@ -17,7 +17,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-22645.rs:15:3
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 LL |   let b = Bob + 3.5;
 LL |   b + 3
    |   ^^^^^ expected `()`, found `Bob`
diff --git a/tests/ui/block-result/issue-5500.stderr b/tests/ui/block-result/issue-5500.stderr
index 8cd4bd65871..417991e9e0b 100644
--- a/tests/ui/block-result/issue-5500.stderr
+++ b/tests/ui/block-result/issue-5500.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-5500.rs:2:5
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 LL |     &panic!()
    |     ^^^^^^^^^ expected `()`, found `&_`
    |
diff --git a/tests/ui/borrowck/regions-bound-missing-bound-in-impl.stderr b/tests/ui/borrowck/regions-bound-missing-bound-in-impl.stderr
index 930fea9158d..7ebea3c03d3 100644
--- a/tests/ui/borrowck/regions-bound-missing-bound-in-impl.stderr
+++ b/tests/ui/borrowck/regions-bound-missing-bound-in-impl.stderr
@@ -53,6 +53,7 @@ note: ...does not necessarily outlive the lifetime `'c` as defined here
    |
 LL |     fn wrong_bound1<'b,'c,'d:'a+'c>(self, b: Inv<'b>, c: Inv<'c>, d: Inv<'d>) {
    |                        ^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0195]: lifetime parameters or bounds on method `wrong_bound2` do not match the trait declaration
   --> $DIR/regions-bound-missing-bound-in-impl.rs:42:20
diff --git a/tests/ui/cfg/future-compat-crate-attributes-using-cfg_attr.stderr b/tests/ui/cfg/future-compat-crate-attributes-using-cfg_attr.stderr
index 9ce4710d69b..75df314e0ba 100644
--- a/tests/ui/cfg/future-compat-crate-attributes-using-cfg_attr.stderr
+++ b/tests/ui/cfg/future-compat-crate-attributes-using-cfg_attr.stderr
@@ -25,6 +25,7 @@ LL | #![cfg_attr(foo, crate_type="bin")]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #91632 <https://github.com/rust-lang/rust/issues/91632>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: `crate_name` within an `#![cfg_attr] attribute is deprecated`
   --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:9:18
@@ -34,6 +35,7 @@ LL | #![cfg_attr(foo, crate_name="bar")]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #91632 <https://github.com/rust-lang/rust/issues/91632>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/closures/add_semicolon_non_block_closure.stderr b/tests/ui/closures/add_semicolon_non_block_closure.stderr
index ed829fc98f8..6f9c309edda 100644
--- a/tests/ui/closures/add_semicolon_non_block_closure.stderr
+++ b/tests/ui/closures/add_semicolon_non_block_closure.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/add_semicolon_non_block_closure.rs:8:12
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 LL |     foo(|| bar())
    |            ^^^^^ expected `()`, found `i32`
    |
diff --git a/tests/ui/closures/binder/implicit-return.stderr b/tests/ui/closures/binder/implicit-return.stderr
index 5bfb9711334..35db34ce21d 100644
--- a/tests/ui/closures/binder/implicit-return.stderr
+++ b/tests/ui/closures/binder/implicit-return.stderr
@@ -1,8 +1,8 @@
 error: implicit types in closure signatures are forbidden when `for<...>` is present
-  --> $DIR/implicit-return.rs:4:34
+  --> $DIR/implicit-return.rs:4:33
    |
 LL |     let _f = for<'a> |_: &'a ()| {};
-   |              -------             ^
+   |              -------            ^
    |              |
    |              `for<...>` is here
 
diff --git a/tests/ui/closures/binder/implicit-stuff.stderr b/tests/ui/closures/binder/implicit-stuff.stderr
index 779a08a44e5..cec2a60ba28 100644
--- a/tests/ui/closures/binder/implicit-stuff.stderr
+++ b/tests/ui/closures/binder/implicit-stuff.stderr
@@ -41,10 +41,10 @@ LL |     let _ = for<'a> |x: &'a ()| -> &() { x };
    |                                    ^ explicit lifetime name needed here
 
 error: implicit types in closure signatures are forbidden when `for<...>` is present
-  --> $DIR/implicit-stuff.rs:5:22
+  --> $DIR/implicit-stuff.rs:5:21
    |
 LL |     let _ = for<> || {};
-   |             -----    ^
+   |             -----   ^
    |             |
    |             `for<...>` is here
 
diff --git a/tests/ui/codegen/issue-79865-llvm-miscompile.rs b/tests/ui/codegen/issue-79865-llvm-miscompile.rs
index b77f09f8e9a..6f994a5cb74 100644
--- a/tests/ui/codegen/issue-79865-llvm-miscompile.rs
+++ b/tests/ui/codegen/issue-79865-llvm-miscompile.rs
@@ -4,7 +4,7 @@
 
 // Regression test for issue #79865.
 // The assertion will fail when compiled with Rust 1.56..=1.59
-// due to a LLVM miscompilation.
+// due to an LLVM miscompilation.
 
 use std::arch::x86_64::*;
 
diff --git a/tests/ui/codemap_tests/tab.stderr b/tests/ui/codemap_tests/tab.stderr
index c3f19d20d39..d2de7486557 100644
--- a/tests/ui/codemap_tests/tab.stderr
+++ b/tests/ui/codemap_tests/tab.stderr
@@ -8,7 +8,7 @@ error[E0308]: mismatched types
   --> $DIR/tab.rs:8:2
    |
 LL | fn foo() {
-   |          - help: try adding a return type: `-> &'static str`
+   |         - help: try adding a return type: `-> &'static str`
 LL |     "bar            boo"
    |     ^^^^^^^^^^^^^^^^^^^^ expected `()`, found `&str`
 
diff --git a/tests/ui/compare-method/bad-self-type.stderr b/tests/ui/compare-method/bad-self-type.stderr
index f632a53f264..a87b713c2b4 100644
--- a/tests/ui/compare-method/bad-self-type.stderr
+++ b/tests/ui/compare-method/bad-self-type.stderr
@@ -28,10 +28,10 @@ LL |     fn foo(self);
               found signature `fn(Box<MyFuture>)`
 
 error[E0053]: method `bar` has an incompatible type for trait
-  --> $DIR/bad-self-type.rs:24:18
+  --> $DIR/bad-self-type.rs:24:17
    |
 LL |     fn bar(self) {}
-   |                  ^ expected `Option<()>`, found `()`
+   |                 ^ expected `Option<()>`, found `()`
    |
 note: type in trait
   --> $DIR/bad-self-type.rs:18:21
diff --git a/tests/ui/conditional-compilation/cfg-attr-syntax-validation.stderr b/tests/ui/conditional-compilation/cfg-attr-syntax-validation.stderr
index d5b4349c00f..12557ff6360 100644
--- a/tests/ui/conditional-compilation/cfg-attr-syntax-validation.stderr
+++ b/tests/ui/conditional-compilation/cfg-attr-syntax-validation.stderr
@@ -74,6 +74,7 @@ LL |         #[cfg(feature = $expr)]
 LL | generate_s10!(concat!("nonexistent"));
    | ------------------------------------- in this macro invocation
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this error originates in the macro `generate_s10` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 11 previous errors
diff --git a/tests/ui/const-generics/assoc_const_eq_diagnostic.stderr b/tests/ui/const-generics/assoc_const_eq_diagnostic.stderr
index d7e5e50cba8..6d5cd45479e 100644
--- a/tests/ui/const-generics/assoc_const_eq_diagnostic.stderr
+++ b/tests/ui/const-generics/assoc_const_eq_diagnostic.stderr
@@ -39,6 +39,7 @@ note: associated constant defined here
    |
 LL |     const MODE: Mode;
    |     ^^^^^^^^^^^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/const-generics/const-argument-if-length.full.stderr b/tests/ui/const-generics/const-argument-if-length.full.stderr
index 7997026dfe4..315b0f0a064 100644
--- a/tests/ui/const-generics/const-argument-if-length.full.stderr
+++ b/tests/ui/const-generics/const-argument-if-length.full.stderr
@@ -1,3 +1,11 @@
+error: unconstrained generic constant
+  --> $DIR/const-argument-if-length.rs:17:10
+   |
+LL |     pad: [u8; is_zst::<T>()],
+   |          ^^^^^^^^^^^^^^^^^^^
+   |
+   = help: try adding a `where` bound using this expression: `where [(); is_zst::<T>()]:`
+
 error[E0277]: the size for values of type `T` cannot be known at compilation time
   --> $DIR/const-argument-if-length.rs:15:12
    |
@@ -22,14 +30,6 @@ help: the `Box` type always has a statically known size and allocates its conten
 LL |     value: Box<T>,
    |            ++++ +
 
-error: unconstrained generic constant
-  --> $DIR/const-argument-if-length.rs:17:10
-   |
-LL |     pad: [u8; is_zst::<T>()],
-   |          ^^^^^^^^^^^^^^^^^^^
-   |
-   = help: try adding a `where` bound using this expression: `where [(); is_zst::<T>()]:`
-
 error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/const-generics/issues/issue-74950.min.stderr b/tests/ui/const-generics/issues/issue-74950.min.stderr
index a5dbe10b78a..54ef1ea1e94 100644
--- a/tests/ui/const-generics/issues/issue-74950.min.stderr
+++ b/tests/ui/const-generics/issues/issue-74950.min.stderr
@@ -15,6 +15,7 @@ LL | struct Outer<const I: Inner>;
    |
    = note: the only supported types are integers, `bool` and `char`
    = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: `Inner` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74950.rs:20:23
@@ -24,6 +25,7 @@ LL | struct Outer<const I: Inner>;
    |
    = note: the only supported types are integers, `bool` and `char`
    = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: `Inner` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74950.rs:20:23
@@ -33,6 +35,7 @@ LL | struct Outer<const I: Inner>;
    |
    = note: the only supported types are integers, `bool` and `char`
    = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: `Inner` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74950.rs:20:23
@@ -42,6 +45,7 @@ LL | struct Outer<const I: Inner>;
    |
    = note: the only supported types are integers, `bool` and `char`
    = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 5 previous errors
 
diff --git a/tests/ui/const-generics/issues/issue-83249.stderr b/tests/ui/const-generics/issues/issue-83249.stderr
index 7491fdc8a69..5187434ff40 100644
--- a/tests/ui/const-generics/issues/issue-83249.stderr
+++ b/tests/ui/const-generics/issues/issue-83249.stderr
@@ -1,9 +1,18 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/issue-83249.rs:19:9
    |
 LL |     let _ = foo([0; 1]);
-   |         ^
+   |         ^   --- ------ type must be known at this point
+   |             |
+   |             required by a bound introduced by this call
    |
+   = note: cannot satisfy `_: Foo`
+   = help: the trait `Foo` is implemented for `u8`
+note: required by a bound in `foo`
+  --> $DIR/issue-83249.rs:12:11
+   |
+LL | fn foo<T: Foo>(_: [u8; T::N]) -> T {
+   |           ^^^ required by this bound in `foo`
 help: consider giving this pattern a type
    |
 LL |     let _: /* Type */ = foo([0; 1]);
@@ -11,4 +20,4 @@ LL |     let _: /* Type */ = foo([0; 1]);
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/const-generics/occurs-check/unused-substs-1.stderr b/tests/ui/const-generics/occurs-check/unused-substs-1.stderr
index 51ef354e3ed..61d055e8084 100644
--- a/tests/ui/const-generics/occurs-check/unused-substs-1.stderr
+++ b/tests/ui/const-generics/occurs-check/unused-substs-1.stderr
@@ -4,7 +4,7 @@ error[E0277]: the trait bound `A<_>: Bar<_>` is not satisfied
 LL |     let _ = A;
    |             ^ the trait `Bar<_>` is not implemented for `A<_>`
    |
-   = help: the trait `Bar<N>` is implemented for `A<7>`
+   = help: the trait `Bar<_>` is implemented for `A<7>`
 note: required by a bound in `A`
   --> $DIR/unused-substs-1.rs:9:11
    |
diff --git a/tests/ui/consts/const-adt-align-mismatch.rs b/tests/ui/consts/const-adt-align-mismatch.rs
index bd51bc9f215..89b3a9b744b 100644
--- a/tests/ui/consts/const-adt-align-mismatch.rs
+++ b/tests/ui/consts/const-adt-align-mismatch.rs
@@ -12,7 +12,7 @@ enum Foo {
 }
 
 // NOTE(eddyb) Don't make this a const, needs to be a static
-// so it is always instantiated as a LLVM constant value.
+// so it is always instantiated as an LLVM constant value.
 static FOO: Foo = Foo::C;
 
 fn main() {
diff --git a/tests/ui/consts/const-err-late.stderr b/tests/ui/consts/const-err-late.stderr
index 85bc56baed8..35c3d000117 100644
--- a/tests/ui/consts/const-err-late.stderr
+++ b/tests/ui/consts/const-err-late.stderr
@@ -27,6 +27,8 @@ note: erroneous constant encountered
    |
 LL |     black_box((S::<i32>::FOO, S::<u32>::FOO));
    |                ^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/consts/const-eval/issue-44578.stderr b/tests/ui/consts/const-eval/issue-44578.stderr
index c7aaee94271..eea42c8ce45 100644
--- a/tests/ui/consts/const-eval/issue-44578.stderr
+++ b/tests/ui/consts/const-eval/issue-44578.stderr
@@ -24,6 +24,7 @@ note: erroneous constant encountered
 LL |     println!("{}", <Bar<u16, u8> as Foo>::AMT);
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this note originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
diff --git a/tests/ui/consts/const-eval/nrvo.rs b/tests/ui/consts/const-eval/nrvo.rs
index 1d2c6acc06c..22da96a3fc1 100644
--- a/tests/ui/consts/const-eval/nrvo.rs
+++ b/tests/ui/consts/const-eval/nrvo.rs
@@ -1,7 +1,8 @@
 // run-pass
 
 // When the NRVO is applied, the return place (`_0`) gets treated like a normal local. For example,
-// its address may be taken and it may be written to indirectly. Ensure that MIRI can handle this.
+// its address may be taken and it may be written to indirectly. Ensure that the const-eval
+// interpreter can handle this.
 
 #![feature(const_mut_refs)]
 
diff --git a/tests/ui/consts/const-eval/panic-assoc-never-type.stderr b/tests/ui/consts/const-eval/panic-assoc-never-type.stderr
index 4706497dbc4..50660664f87 100644
--- a/tests/ui/consts/const-eval/panic-assoc-never-type.stderr
+++ b/tests/ui/consts/const-eval/panic-assoc-never-type.stderr
@@ -17,6 +17,8 @@ note: erroneous constant encountered
    |
 LL |     let _ = PrintName::VOID;
    |             ^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/consts/const-eval/stable-metric/ctfe-simple-loop.warn.stderr b/tests/ui/consts/const-eval/stable-metric/ctfe-simple-loop.warn.stderr
index 40fc4a876e9..8eee392d15c 100644
--- a/tests/ui/consts/const-eval/stable-metric/ctfe-simple-loop.warn.stderr
+++ b/tests/ui/consts/const-eval/stable-metric/ctfe-simple-loop.warn.stderr
@@ -40,6 +40,7 @@ help: the constant being evaluated
    |
 LL | const Y: u32 = simple_loop(35);
    | ^^^^^^^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: constant evaluation is taking a long time
   --> $DIR/ctfe-simple-loop.rs:9:5
diff --git a/tests/ui/consts/const-eval/union-const-eval-field.rs b/tests/ui/consts/const-eval/union-const-eval-field.rs
index a94fcbbfa56..c9799989ea8 100644
--- a/tests/ui/consts/const-eval/union-const-eval-field.rs
+++ b/tests/ui/consts/const-eval/union-const-eval-field.rs
@@ -1,5 +1,3 @@
-// only-x86_64
-
 type Field1 = i32;
 type Field2 = f32;
 type Field3 = i64;
diff --git a/tests/ui/consts/const-eval/union-const-eval-field.stderr b/tests/ui/consts/const-eval/union-const-eval-field.stderr
index ce260300fc8..b299208ae81 100644
--- a/tests/ui/consts/const-eval/union-const-eval-field.stderr
+++ b/tests/ui/consts/const-eval/union-const-eval-field.stderr
@@ -1,20 +1,22 @@
 error[E0080]: evaluation of constant value failed
-  --> $DIR/union-const-eval-field.rs:28:37
+  --> $DIR/union-const-eval-field.rs:26:37
    |
 LL |     const FIELD3: Field3 = unsafe { UNION.field3 };
    |                                     ^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory
 
 note: erroneous constant encountered
-  --> $DIR/union-const-eval-field.rs:31:5
+  --> $DIR/union-const-eval-field.rs:29:5
    |
 LL |     FIELD3
    |     ^^^^^^
 
 note: erroneous constant encountered
-  --> $DIR/union-const-eval-field.rs:31:5
+  --> $DIR/union-const-eval-field.rs:29:5
    |
 LL |     FIELD3
    |     ^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/consts/const_in_pattern/reject_non_structural.rs b/tests/ui/consts/const_in_pattern/reject_non_structural.rs
index dc6b9a33197..df772740ab1 100644
--- a/tests/ui/consts/const_in_pattern/reject_non_structural.rs
+++ b/tests/ui/consts/const_in_pattern/reject_non_structural.rs
@@ -1,3 +1,5 @@
+// compile-flags: -Zdeduplicate-diagnostics=yes
+
 // This test of structural match checking enumerates the different kinds of
 // const definitions, collecting cases where the const pattern is rejected.
 //
@@ -78,9 +80,6 @@ fn main() {
     //~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]`
     //~| NOTE the traits must be derived
     //~| NOTE StructuralEq.html for details
-    //~| ERROR must be annotated with `#[derive(PartialEq, Eq)]`
-    //~| NOTE the traits must be derived
-    //~| NOTE StructuralEq.html for details
 
     trait Trait: Sized { const ASSOC: Option<Self>; }
     impl Trait for NoDerive { const ASSOC: Option<NoDerive> = Some(NoDerive); }
diff --git a/tests/ui/consts/const_in_pattern/reject_non_structural.stderr b/tests/ui/consts/const_in_pattern/reject_non_structural.stderr
index b6e439f2139..72bb0aeafa4 100644
--- a/tests/ui/consts/const_in_pattern/reject_non_structural.stderr
+++ b/tests/ui/consts/const_in_pattern/reject_non_structural.stderr
@@ -1,5 +1,5 @@
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:40:36
+  --> $DIR/reject_non_structural.rs:42:36
    |
 LL |     match Derive::Some(NoDerive) { ENUM => dbg!(ENUM), _ => panic!("whoops"), };
    |                                    ^^^^
@@ -8,7 +8,7 @@ LL |     match Derive::Some(NoDerive) { ENUM => dbg!(ENUM), _ => panic!("whoops"
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:46:28
+  --> $DIR/reject_non_structural.rs:48:28
    |
 LL |     match Some(NoDerive) { FIELD => dbg!(FIELD), _ => panic!("whoops"), };
    |                            ^^^^^
@@ -17,7 +17,7 @@ LL |     match Some(NoDerive) { FIELD => dbg!(FIELD), _ => panic!("whoops"), };
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:53:27
+  --> $DIR/reject_non_structural.rs:55:27
    |
 LL |     match Some(NoDerive) {INDIRECT => dbg!(INDIRECT), _ => panic!("whoops"), };
    |                           ^^^^^^^^
@@ -26,7 +26,7 @@ LL |     match Some(NoDerive) {INDIRECT => dbg!(INDIRECT), _ => panic!("whoops")
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:59:36
+  --> $DIR/reject_non_structural.rs:61:36
    |
 LL |     match (None, Some(NoDerive)) { TUPLE => dbg!(TUPLE), _ => panic!("whoops"), };
    |                                    ^^^^^
@@ -35,7 +35,7 @@ LL |     match (None, Some(NoDerive)) { TUPLE => dbg!(TUPLE), _ => panic!("whoop
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:65:28
+  --> $DIR/reject_non_structural.rs:67:28
    |
 LL |     match Some(NoDerive) { TYPE_ASCRIPTION => dbg!(TYPE_ASCRIPTION), _ => panic!("whoops"), };
    |                            ^^^^^^^^^^^^^^^
@@ -44,7 +44,7 @@ LL |     match Some(NoDerive) { TYPE_ASCRIPTION => dbg!(TYPE_ASCRIPTION), _ => p
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:71:36
+  --> $DIR/reject_non_structural.rs:73:36
    |
 LL |     match [None, Some(NoDerive)] { ARRAY => dbg!(ARRAY), _ => panic!("whoops"), };
    |                                    ^^^^^
@@ -53,7 +53,7 @@ LL |     match [None, Some(NoDerive)] { ARRAY => dbg!(ARRAY), _ => panic!("whoop
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:77:33
+  --> $DIR/reject_non_structural.rs:79:33
    |
 LL |     match [Some(NoDerive); 2] { REPEAT => dbg!(REPEAT), _ => panic!("whoops"), };
    |                                 ^^^^^^
@@ -62,16 +62,7 @@ LL |     match [Some(NoDerive); 2] { REPEAT => dbg!(REPEAT), _ => panic!("whoops
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:77:33
-   |
-LL |     match [Some(NoDerive); 2] { REPEAT => dbg!(REPEAT), _ => panic!("whoops"), };
-   |                                 ^^^^^^
-   |
-   = note: the traits must be derived, manual `impl`s are not sufficient
-   = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
-
-error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:87:28
+  --> $DIR/reject_non_structural.rs:86:28
    |
 LL |     match Some(NoDerive) { NoDerive::ASSOC => dbg!(NoDerive::ASSOC), _ => panic!("whoops"), };
    |                            ^^^^^^^^^^^^^^^
@@ -80,7 +71,7 @@ LL |     match Some(NoDerive) { NoDerive::ASSOC => dbg!(NoDerive::ASSOC), _ => p
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:93:28
+  --> $DIR/reject_non_structural.rs:92:28
    |
 LL |     match Some(NoDerive) { BLOCK => dbg!(BLOCK), _ => panic!("whoops"), };
    |                            ^^^^^
@@ -89,7 +80,7 @@ LL |     match Some(NoDerive) { BLOCK => dbg!(BLOCK), _ => panic!("whoops"), };
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 
 warning: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/reject_non_structural.rs:99:29
+  --> $DIR/reject_non_structural.rs:98:29
    |
 LL |     match &Some(NoDerive) { ADDR_OF => dbg!(ADDR_OF), _ => panic!("whoops"), };
    |                             ^^^^^^^
@@ -99,10 +90,10 @@ LL |     match &Some(NoDerive) { ADDR_OF => dbg!(ADDR_OF), _ => panic!("whoops")
    = note: the traits must be derived, manual `impl`s are not sufficient
    = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
 note: the lint level is defined here
-  --> $DIR/reject_non_structural.rs:12:9
+  --> $DIR/reject_non_structural.rs:14:9
    |
 LL | #![warn(indirect_structural_match)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 10 previous errors; 1 warning emitted
+error: aborting due to 9 previous errors; 1 warning emitted
 
diff --git a/tests/ui/consts/enum-discr-type-err.stderr b/tests/ui/consts/enum-discr-type-err.stderr
index 2f97582bea8..9a09d6a96f1 100644
--- a/tests/ui/consts/enum-discr-type-err.stderr
+++ b/tests/ui/consts/enum-discr-type-err.stderr
@@ -24,6 +24,7 @@ LL | |     B = T,
 LL | | }
    | |_- in this macro invocation
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this error originates in the macro `mac` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 2 previous errors
diff --git a/tests/ui/consts/fn_trait_refs.stderr b/tests/ui/consts/fn_trait_refs.stderr
index 658a0b7b2a0..3d82837d530 100644
--- a/tests/ui/consts/fn_trait_refs.stderr
+++ b/tests/ui/consts/fn_trait_refs.stderr
@@ -21,6 +21,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL |     T: ~const Fn<()> + ~const Destruct,
    |               ^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: ~const can only be applied to `#[const_trait]` traits
   --> $DIR/fn_trait_refs.rs:22:15
@@ -33,6 +35,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL |     T: ~const FnMut<()> + ~const Destruct,
    |               ^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: ~const can only be applied to `#[const_trait]` traits
   --> $DIR/fn_trait_refs.rs:29:15
@@ -45,6 +49,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL |     T: ~const FnOnce<()>,
    |               ^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: ~const can only be applied to `#[const_trait]` traits
   --> $DIR/fn_trait_refs.rs:36:15
@@ -57,6 +63,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL |     T: ~const Fn<()> + ~const Destruct,
    |               ^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: ~const can only be applied to `#[const_trait]` traits
   --> $DIR/fn_trait_refs.rs:50:15
@@ -69,6 +77,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL |     T: ~const FnMut<()> + ~const Destruct,
    |               ^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 12 previous errors
 
diff --git a/tests/ui/consts/invalid-union.32bit.stderr b/tests/ui/consts/invalid-union.32bit.stderr
index b6cf060e5ae..0c57751cbfa 100644
--- a/tests/ui/consts/invalid-union.32bit.stderr
+++ b/tests/ui/consts/invalid-union.32bit.stderr
@@ -20,6 +20,8 @@ note: erroneous constant encountered
    |
 LL |     let _: &'static _ = &C;
    |                         ^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/consts/invalid-union.64bit.stderr b/tests/ui/consts/invalid-union.64bit.stderr
index e3a3ef62c4a..6c4d5882158 100644
--- a/tests/ui/consts/invalid-union.64bit.stderr
+++ b/tests/ui/consts/invalid-union.64bit.stderr
@@ -20,6 +20,8 @@ note: erroneous constant encountered
    |
 LL |     let _: &'static _ = &C;
    |                         ^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/consts/issue-102117.stderr b/tests/ui/consts/issue-102117.stderr
index f42bcf90fb7..a297916b30f 100644
--- a/tests/ui/consts/issue-102117.stderr
+++ b/tests/ui/consts/issue-102117.stderr
@@ -15,6 +15,7 @@ error[E0310]: the parameter type `T` may not live long enough
 LL |                 type_id: TypeId::of::<T>(),
    |                          ^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: consider adding an explicit lifetime bound...
    |
 LL |     pub fn new<T: 'static>() -> &'static Self {
diff --git a/tests/ui/consts/issue-17718-const-bad-values.stderr b/tests/ui/consts/issue-17718-const-bad-values.stderr
index ce60aaa0797..405c2195dec 100644
--- a/tests/ui/consts/issue-17718-const-bad-values.stderr
+++ b/tests/ui/consts/issue-17718-const-bad-values.stderr
@@ -19,6 +19,7 @@ LL | const C2: &'static mut usize = unsafe { &mut S };
    |                                              ^
    |
    = help: consider extracting the value of the `static` to a `const`, and referring to that
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/consts/miri_unleashed/assoc_const.stderr b/tests/ui/consts/miri_unleashed/assoc_const.stderr
index 274b1de7e7d..b129aef3452 100644
--- a/tests/ui/consts/miri_unleashed/assoc_const.stderr
+++ b/tests/ui/consts/miri_unleashed/assoc_const.stderr
@@ -24,6 +24,8 @@ note: erroneous constant encountered
    |
 LL |     let y = <String as Bar<Vec<u32>, String>>::F;
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: skipping const checks
    |
diff --git a/tests/ui/consts/miri_unleashed/assoc_const_2.stderr b/tests/ui/consts/miri_unleashed/assoc_const_2.stderr
index c8e4cab4e71..46408f6748d 100644
--- a/tests/ui/consts/miri_unleashed/assoc_const_2.stderr
+++ b/tests/ui/consts/miri_unleashed/assoc_const_2.stderr
@@ -15,6 +15,8 @@ note: erroneous constant encountered
    |
 LL |     let y = <String as Bar<String>>::F;
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/consts/uninhabited-const-issue-61744.stderr b/tests/ui/consts/uninhabited-const-issue-61744.stderr
index f48e6c4ce51..c92824a0d1a 100644
--- a/tests/ui/consts/uninhabited-const-issue-61744.stderr
+++ b/tests/ui/consts/uninhabited-const-issue-61744.stderr
@@ -656,6 +656,8 @@ note: erroneous constant encountered
    |
 LL |     dbg!(i32::CONSTANT);
    |          ^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/crate-loading/invalid-rlib.rs b/tests/ui/crate-loading/invalid-rlib.rs
index aea861e3261..0997bee19bb 100644
--- a/tests/ui/crate-loading/invalid-rlib.rs
+++ b/tests/ui/crate-loading/invalid-rlib.rs
@@ -8,3 +8,4 @@ use ::foo; //~ ERROR invalid metadata files for crate `foo`
 //~| NOTE failed to mmap file
 //~^^ ERROR invalid metadata files for crate `foo`
 //~| NOTE failed to mmap file
+//~| NOTE duplicate diagnostic
diff --git a/tests/ui/crate-loading/invalid-rlib.stderr b/tests/ui/crate-loading/invalid-rlib.stderr
index 3c0d23bf7b4..63bb1b95cbb 100644
--- a/tests/ui/crate-loading/invalid-rlib.stderr
+++ b/tests/ui/crate-loading/invalid-rlib.stderr
@@ -13,6 +13,7 @@ LL | use ::foo;
    |       ^^^
    |
    = note: failed to mmap file 'auxiliary/libfoo.rlib'
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/debuginfo/sroa-fragment-debuginfo.rs b/tests/ui/debuginfo/sroa-fragment-debuginfo.rs
index 9c3c359e395..fc3bbb88efe 100644
--- a/tests/ui/debuginfo/sroa-fragment-debuginfo.rs
+++ b/tests/ui/debuginfo/sroa-fragment-debuginfo.rs
@@ -1,4 +1,4 @@
-// Verify that we do not trigger a LLVM assertion by creating zero-sized DWARF fragments.
+// Verify that we do not trigger an LLVM assertion by creating zero-sized DWARF fragments.
 //
 // build-pass
 // compile-flags: -g -Zmir-opt-level=0 -Zmir-enable-passes=+ScalarReplacementOfAggregates
diff --git a/tests/ui/deduplicate-diagnostics.duplicate.stderr b/tests/ui/deduplicate-diagnostics.duplicate.stderr
index cd4700c7a7c..0544b993278 100644
--- a/tests/ui/deduplicate-diagnostics.duplicate.stderr
+++ b/tests/ui/deduplicate-diagnostics.duplicate.stderr
@@ -15,12 +15,16 @@ error: cannot find derive macro `Unresolved` in this scope
    |
 LL | #[derive(Unresolved)]
    |          ^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0452]: malformed lint attribute input
   --> $DIR/deduplicate-diagnostics.rs:8:8
    |
 LL | #[deny("literal")]
    |        ^^^^^^^^^ bad attribute argument
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/deprecation/deprecation-sanity.stderr b/tests/ui/deprecation/deprecation-sanity.stderr
index 8b2b480d195..383212ad9b4 100644
--- a/tests/ui/deprecation/deprecation-sanity.stderr
+++ b/tests/ui/deprecation/deprecation-sanity.stderr
@@ -16,25 +16,25 @@ error[E0541]: unknown meta item 'reason'
 LL |     #[deprecated(since = "a", note = "a", reason)]
    |                                           ^^^^^^ expected one of `since`, `note`
 
-error[E0551]: incorrect meta item
+error[E0539]: incorrect meta item
   --> $DIR/deprecation-sanity.rs:7:31
    |
 LL |     #[deprecated(since = "a", note)]
    |                               ^^^^
 
-error[E0551]: incorrect meta item
+error[E0539]: incorrect meta item
   --> $DIR/deprecation-sanity.rs:10:18
    |
 LL |     #[deprecated(since, note = "a")]
    |                  ^^^^^
 
-error[E0551]: incorrect meta item
+error[E0539]: incorrect meta item
   --> $DIR/deprecation-sanity.rs:13:31
    |
 LL |     #[deprecated(since = "a", note(b))]
    |                               ^^^^^^^
 
-error[E0551]: incorrect meta item
+error[E0539]: incorrect meta item
   --> $DIR/deprecation-sanity.rs:16:18
    |
 LL |     #[deprecated(since(b), note = "a")]
@@ -70,5 +70,5 @@ LL | #[deprecated = "hello"]
 
 error: aborting due to 10 previous errors
 
-Some errors have detailed explanations: E0538, E0541, E0551, E0565.
+Some errors have detailed explanations: E0538, E0539, E0541, E0565.
 For more information about an error, try `rustc --explain E0538`.
diff --git a/tests/ui/derives/deriving-bounds.stderr b/tests/ui/derives/deriving-bounds.stderr
index 74ca37287d2..4461652eb02 100644
--- a/tests/ui/derives/deriving-bounds.stderr
+++ b/tests/ui/derives/deriving-bounds.stderr
@@ -21,6 +21,7 @@ note: unsafe traits like `Sync` should be implemented explicitly
    |
 LL | #[derive(Sync)]
    |          ^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot find derive macro `Send` in this scope
   --> $DIR/deriving-bounds.rs:1:10
@@ -45,6 +46,7 @@ note: unsafe traits like `Send` should be implemented explicitly
    |
 LL | #[derive(Send)]
    |          ^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/derives/deriving-meta-unknown-trait.stderr b/tests/ui/derives/deriving-meta-unknown-trait.stderr
index 053d34f6825..28753b8f9f2 100644
--- a/tests/ui/derives/deriving-meta-unknown-trait.stderr
+++ b/tests/ui/derives/deriving-meta-unknown-trait.stderr
@@ -15,6 +15,8 @@ LL | #[derive(Eqr)]
   --> $SRC_DIR/core/src/cmp.rs:LL:COL
    |
    = note: similarly named derive macro `Eq` defined here
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/derives/deriving-primitive.stderr b/tests/ui/derives/deriving-primitive.stderr
index ca64c9ee732..b39637825e5 100644
--- a/tests/ui/derives/deriving-primitive.stderr
+++ b/tests/ui/derives/deriving-primitive.stderr
@@ -9,6 +9,8 @@ error: cannot find derive macro `FromPrimitive` in this scope
    |
 LL | #[derive(FromPrimitive)]
    |          ^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/diagnostic_namespace/on_unimplemented/do_not_fail_parsing_on_invalid_options_1.stderr b/tests/ui/diagnostic_namespace/on_unimplemented/do_not_fail_parsing_on_invalid_options_1.stderr
index bb1b29ef248..bd39c91ffe8 100644
--- a/tests/ui/diagnostic_namespace/on_unimplemented/do_not_fail_parsing_on_invalid_options_1.stderr
+++ b/tests/ui/diagnostic_namespace/on_unimplemented/do_not_fail_parsing_on_invalid_options_1.stderr
@@ -35,6 +35,8 @@ warning: malformed `on_unimplemented` attribute
    |
 LL | #[diagnostic::on_unimplemented(unsupported = "foo")]
    |                                ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0277]: the trait bound `i32: Foo` is not satisfied
   --> $DIR/do_not_fail_parsing_on_invalid_options_1.rs:31:14
@@ -60,6 +62,8 @@ warning: malformed `on_unimplemented` attribute
    |
 LL | #[diagnostic::on_unimplemented(message = "Boom", unsupported = "Bar")]
    |                                                  ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0277]: Boom
   --> $DIR/do_not_fail_parsing_on_invalid_options_1.rs:33:14
@@ -85,6 +89,8 @@ warning: malformed `on_unimplemented` attribute
    |
 LL | #[diagnostic::on_unimplemented(message = "Boom", on(_Self = "i32", message = "whatever"))]
    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0277]: Boom
   --> $DIR/do_not_fail_parsing_on_invalid_options_1.rs:35:15
diff --git a/tests/ui/did_you_mean/auxiliary/doc-hidden-fields.rs b/tests/ui/did_you_mean/auxiliary/doc-hidden-fields.rs
new file mode 100644
index 00000000000..4e2ee97403c
--- /dev/null
+++ b/tests/ui/did_you_mean/auxiliary/doc-hidden-fields.rs
@@ -0,0 +1,6 @@
+#[derive(Default)]
+pub struct B {
+    #[doc(hidden)]
+    pub hello: i32,
+    pub bye: i32,
+}
diff --git a/tests/ui/did_you_mean/dont-suggest-doc-hidden-fields.rs b/tests/ui/did_you_mean/dont-suggest-doc-hidden-fields.rs
new file mode 100644
index 00000000000..6040f3f30a7
--- /dev/null
+++ b/tests/ui/did_you_mean/dont-suggest-doc-hidden-fields.rs
@@ -0,0 +1,38 @@
+// Regression test for issue #93210.
+
+// aux-crate:doc_hidden_fields=doc-hidden-fields.rs
+// edition: 2021
+
+#[derive(Default)]
+pub struct A {
+    #[doc(hidden)]
+    pub hello: i32,
+    pub bye: i32,
+}
+
+#[derive(Default)]
+pub struct C {
+    pub hello: i32,
+    pub bye: i32,
+}
+
+fn main() {
+    // We want to list the field `hello` despite being marked
+    // `doc(hidden)` because it's defined in this crate.
+    A::default().hey;
+    //~^ ERROR no field `hey` on type `A`
+    //~| NOTE unknown field
+    //~| NOTE available fields are: `hello`, `bye`
+
+    // Here we want to hide the field `hello` since it's marked
+    // `doc(hidden)` and comes from an external crate.
+    doc_hidden_fields::B::default().hey;
+    //~^ ERROR no field `hey` on type `B`
+    //~| NOTE unknown field
+    //~| NOTE available fields are: `bye`
+
+    C::default().hey;
+    //~^ ERROR no field `hey` on type `C`
+    //~| NOTE unknown field
+    //~| NOTE available fields are: `hello`, `bye`
+}
diff --git a/tests/ui/did_you_mean/dont-suggest-doc-hidden-fields.stderr b/tests/ui/did_you_mean/dont-suggest-doc-hidden-fields.stderr
new file mode 100644
index 00000000000..b7fe3b79b47
--- /dev/null
+++ b/tests/ui/did_you_mean/dont-suggest-doc-hidden-fields.stderr
@@ -0,0 +1,27 @@
+error[E0609]: no field `hey` on type `A`
+  --> $DIR/dont-suggest-doc-hidden-fields.rs:22:18
+   |
+LL |     A::default().hey;
+   |                  ^^^ unknown field
+   |
+   = note: available fields are: `hello`, `bye`
+
+error[E0609]: no field `hey` on type `B`
+  --> $DIR/dont-suggest-doc-hidden-fields.rs:29:37
+   |
+LL |     doc_hidden_fields::B::default().hey;
+   |                                     ^^^ unknown field
+   |
+   = note: available fields are: `bye`
+
+error[E0609]: no field `hey` on type `C`
+  --> $DIR/dont-suggest-doc-hidden-fields.rs:34:18
+   |
+LL |     C::default().hey;
+   |                  ^^^ unknown field
+   |
+   = note: available fields are: `hello`, `bye`
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0609`.
diff --git a/tests/ui/did_you_mean/dont-suggest-hygienic-fields.rs b/tests/ui/did_you_mean/dont-suggest-hygienic-fields.rs
new file mode 100644
index 00000000000..fb7040b2df0
--- /dev/null
+++ b/tests/ui/did_you_mean/dont-suggest-hygienic-fields.rs
@@ -0,0 +1,47 @@
+// Regression test for issue #116334.
+// Don't include hygienic fields from different syntax contexts in
+// the list of available or similarly named fields.
+
+#![feature(decl_macro)]
+
+macro compound($Ty:ident) {
+    #[derive(Default)]
+    struct $Ty {
+        field: u32, // field `field` is hygienic
+    }
+}
+
+macro component($Ty:ident) {
+    struct $Ty(u64); // field `0` is hygienic (but still accessible via the constructor)
+}
+
+compound! { Compound }
+component! { Component }
+
+fn main() {
+    let ty = Compound::default();
+
+    let _ = ty.field; //~ ERROR no field `field` on type `Compound`
+    let _ = ty.fieeld; //~ ERROR no field `fieeld` on type `Compound`
+
+    let Compound { field } = ty;
+    //~^ ERROR struct `Compound` does not have a field named `field`
+    //~| ERROR pattern requires `..` due to inaccessible fields
+    //~| HELP ignore the inaccessible and unused fields
+
+    let ty = Component(90);
+
+    let _ = ty.0; //~ ERROR no field `0` on type `Component`
+}
+
+environment!();
+
+macro environment() {
+    struct Crate { field: () }
+
+    // Here, we do want to suggest `field` even though it's hygienic
+    // precisely because they come from the same syntax context.
+    const CRATE: Crate = Crate { fiel: () };
+    //~^ ERROR struct `Crate` has no field named `fiel`
+    //~| HELP a field with a similar name exists
+}
diff --git a/tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr b/tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr
new file mode 100644
index 00000000000..7066d29760e
--- /dev/null
+++ b/tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr
@@ -0,0 +1,50 @@
+error[E0560]: struct `Crate` has no field named `fiel`
+  --> $DIR/dont-suggest-hygienic-fields.rs:44:34
+   |
+LL | environment!();
+   | -------------- in this macro invocation
+...
+LL |     const CRATE: Crate = Crate { fiel: () };
+   |                                  ^^^^ help: a field with a similar name exists: `field`
+   |
+   = note: this error originates in the macro `environment` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0609]: no field `field` on type `Compound`
+  --> $DIR/dont-suggest-hygienic-fields.rs:24:16
+   |
+LL |     let _ = ty.field;
+   |                ^^^^^ unknown field
+
+error[E0609]: no field `fieeld` on type `Compound`
+  --> $DIR/dont-suggest-hygienic-fields.rs:25:16
+   |
+LL |     let _ = ty.fieeld;
+   |                ^^^^^^ unknown field
+
+error[E0026]: struct `Compound` does not have a field named `field`
+  --> $DIR/dont-suggest-hygienic-fields.rs:27:20
+   |
+LL |     let Compound { field } = ty;
+   |                    ^^^^^ struct `Compound` does not have this field
+
+error: pattern requires `..` due to inaccessible fields
+  --> $DIR/dont-suggest-hygienic-fields.rs:27:9
+   |
+LL |     let Compound { field } = ty;
+   |         ^^^^^^^^^^^^^^^^^^
+   |
+help: ignore the inaccessible and unused fields
+   |
+LL |     let Compound { field, .. } = ty;
+   |                         ++++
+
+error[E0609]: no field `0` on type `Component`
+  --> $DIR/dont-suggest-hygienic-fields.rs:34:16
+   |
+LL |     let _ = ty.0;
+   |                ^ unknown field
+
+error: aborting due to 6 previous errors
+
+Some errors have detailed explanations: E0026, E0560, E0609.
+For more information about an error, try `rustc --explain E0026`.
diff --git a/tests/ui/did_you_mean/issue-93210-ignore-doc-hidden.rs b/tests/ui/did_you_mean/issue-93210-ignore-doc-hidden.rs
deleted file mode 100644
index 0efc7daa3e1..00000000000
--- a/tests/ui/did_you_mean/issue-93210-ignore-doc-hidden.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-#[derive(Default)]
-pub struct A {
-    #[doc(hidden)]
-    pub hello: i32,
-    pub bye: i32,
-}
-
-#[derive(Default)]
-pub struct B {
-    pub hello: i32,
-    pub bye: i32,
-}
-
-fn main() {
-    A::default().hey;
-    //~^ ERROR no field `hey` on type `A`
-    //~| NOTE unknown field
-    //~| NOTE available fields are: `bye`
-
-    B::default().hey;
-    //~^ ERROR no field `hey` on type `B`
-    //~| NOTE unknown field
-    //~| NOTE available fields are: `hello`, `bye`
-}
diff --git a/tests/ui/did_you_mean/issue-93210-ignore-doc-hidden.stderr b/tests/ui/did_you_mean/issue-93210-ignore-doc-hidden.stderr
deleted file mode 100644
index 784986d3b95..00000000000
--- a/tests/ui/did_you_mean/issue-93210-ignore-doc-hidden.stderr
+++ /dev/null
@@ -1,19 +0,0 @@
-error[E0609]: no field `hey` on type `A`
-  --> $DIR/issue-93210-ignore-doc-hidden.rs:15:18
-   |
-LL |     A::default().hey;
-   |                  ^^^ unknown field
-   |
-   = note: available fields are: `bye`
-
-error[E0609]: no field `hey` on type `B`
-  --> $DIR/issue-93210-ignore-doc-hidden.rs:20:18
-   |
-LL |     B::default().hey;
-   |                  ^^^ unknown field
-   |
-   = note: available fields are: `hello`, `bye`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0609`.
diff --git a/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr b/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr
index 6bafff9192a..93178667214 100644
--- a/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr
+++ b/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr
@@ -50,6 +50,7 @@ LL | fn function(x: &SomeTrait, y: Box<SomeTrait>) {
    |
    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | fn function(x: &dyn SomeTrait, y: Box<SomeTrait>) {
@@ -63,6 +64,7 @@ LL | fn function(x: &SomeTrait, y: Box<SomeTrait>) {
    |
    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | fn function(x: &dyn SomeTrait, y: Box<SomeTrait>) {
@@ -76,6 +78,7 @@ LL | fn function(x: &SomeTrait, y: Box<SomeTrait>) {
    |
    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | fn function(x: &SomeTrait, y: Box<dyn SomeTrait>) {
@@ -89,6 +92,7 @@ LL | fn function(x: &SomeTrait, y: Box<SomeTrait>) {
    |
    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | fn function(x: &SomeTrait, y: Box<dyn SomeTrait>) {
diff --git a/tests/ui/error-codes/E0282.rs b/tests/ui/error-codes/E0282.rs
index f1f93b3aed6..5bc29cda9ea 100644
--- a/tests/ui/error-codes/E0282.rs
+++ b/tests/ui/error-codes/E0282.rs
@@ -1,4 +1,4 @@
 fn main() {
-    let x = "hello".chars().rev().collect();
+    let x;
     //~^ ERROR E0282
 }
diff --git a/tests/ui/error-codes/E0282.stderr b/tests/ui/error-codes/E0282.stderr
index 892d3a81f27..58332454a37 100644
--- a/tests/ui/error-codes/E0282.stderr
+++ b/tests/ui/error-codes/E0282.stderr
@@ -1,13 +1,13 @@
 error[E0282]: type annotations needed
   --> $DIR/E0282.rs:2:9
    |
-LL |     let x = "hello".chars().rev().collect();
+LL |     let x;
    |         ^
    |
 help: consider giving `x` an explicit type
    |
-LL |     let x: Vec<_> = "hello".chars().rev().collect();
-   |          ++++++++
+LL |     let x: /* Type */;
+   |          ++++++++++++
 
 error: aborting due to previous error
 
diff --git a/tests/ui/error-codes/E0401.stderr b/tests/ui/error-codes/E0401.stderr
index 928c8d11d20..0a069e8d350 100644
--- a/tests/ui/error-codes/E0401.stderr
+++ b/tests/ui/error-codes/E0401.stderr
@@ -32,12 +32,18 @@ LL |         fn helper(sel: &Self) -> u8 {
    |                         use of generic parameter from outer item
    |                         refer to the type directly here instead
 
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/E0401.rs:11:5
    |
 LL |     bfnr(x);
-   |     ^^^^ cannot infer type of the type parameter `U` declared on the function `bfnr`
+   |     ^^^^ cannot infer type of the type parameter `V` declared on the function `bfnr`
+   |
+   = note: cannot satisfy `_: Baz<_>`
+note: required by a bound in `bfnr`
+  --> $DIR/E0401.rs:4:19
    |
+LL |     fn bfnr<U, V: Baz<U>, W: Fn()>(y: T) {
+   |                   ^^^^^^ required by this bound in `bfnr`
 help: consider specifying the generic arguments
    |
 LL |     bfnr::<U, V, W>(x);
@@ -66,5 +72,5 @@ LL |     bfnr::<U, V, W>(x);
 
 error: aborting due to 5 previous errors
 
-Some errors have detailed explanations: E0282, E0283, E0401.
-For more information about an error, try `rustc --explain E0282`.
+Some errors have detailed explanations: E0283, E0401.
+For more information about an error, try `rustc --explain E0283`.
diff --git a/tests/ui/error-codes/E0452.stderr b/tests/ui/error-codes/E0452.stderr
index f67b740ffe2..986c135ed89 100644
--- a/tests/ui/error-codes/E0452.stderr
+++ b/tests/ui/error-codes/E0452.stderr
@@ -9,18 +9,24 @@ error[E0452]: malformed lint attribute input
    |
 LL | #![allow(foo = "")]
    |          ^^^^^^^^ bad attribute argument
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0452]: malformed lint attribute input
   --> $DIR/E0452.rs:1:10
    |
 LL | #![allow(foo = "")]
    |          ^^^^^^^^ bad attribute argument
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0452]: malformed lint attribute input
   --> $DIR/E0452.rs:1:10
    |
 LL | #![allow(foo = "")]
    |          ^^^^^^^^ bad attribute argument
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/error-codes/E0453.stderr b/tests/ui/error-codes/E0453.stderr
index f982ed26f5c..bb2c39298c0 100644
--- a/tests/ui/error-codes/E0453.stderr
+++ b/tests/ui/error-codes/E0453.stderr
@@ -15,6 +15,8 @@ LL | #![forbid(non_snake_case)]
 LL |
 LL | #[allow(non_snake_case)]
    |         ^^^^^^^^^^^^^^ overruled by previous forbid
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/error-codes/E0602.stderr b/tests/ui/error-codes/E0602.stderr
index 60ecec7cdd7..b6b5cd5c3d3 100644
--- a/tests/ui/error-codes/E0602.stderr
+++ b/tests/ui/error-codes/E0602.stderr
@@ -6,10 +6,12 @@ warning[E0602]: unknown lint: `bogus`
 warning[E0602]: unknown lint: `bogus`
    |
    = note: requested on the command line with `-D bogus`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning[E0602]: unknown lint: `bogus`
    |
    = note: requested on the command line with `-D bogus`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/error-codes/E0719.stderr b/tests/ui/error-codes/E0719.stderr
index e302f406d02..685bd7175e3 100644
--- a/tests/ui/error-codes/E0719.stderr
+++ b/tests/ui/error-codes/E0719.stderr
@@ -13,6 +13,8 @@ LL | trait Foo: Iterator<Item = i32, Item = i32> {}
    |                     ----------  ^^^^^^^^^^ re-bound here
    |                     |
    |                     `Item` bound here first
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
   --> $DIR/E0719.rs:7:42
diff --git a/tests/ui/error-codes/E0789.stderr b/tests/ui/error-codes/E0789.stderr
index faab92bae03..6df9daafec7 100644
--- a/tests/ui/error-codes/E0789.stderr
+++ b/tests/ui/error-codes/E0789.stderr
@@ -9,6 +9,8 @@ error[E0789]: `rustc_allowed_through_unstable_modules` attribute must be paired
    |
 LL | struct Foo;
    | ^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/feature-gates/feature-gate-associated_type_bounds.rs b/tests/ui/feature-gates/feature-gate-associated_type_bounds.rs
index 49fb10e6029..152c7a8de66 100644
--- a/tests/ui/feature-gates/feature-gate-associated_type_bounds.rs
+++ b/tests/ui/feature-gates/feature-gate-associated_type_bounds.rs
@@ -54,20 +54,20 @@ fn _rpit_dyn() -> Box<dyn Tr1<As1: Copy>> { Box::new(S1) }
 
 const _cdef: impl Tr1<As1: Copy> = S1;
 //~^ ERROR associated type bounds are unstable
-//~| ERROR `impl Trait` only allowed in function and inherent method return types
+//~| ERROR `impl Trait` only allowed in function and inherent method argument and return types
 // FIXME: uncomment when `impl_trait_in_bindings` feature is fixed.
 // const _cdef_dyn: &dyn Tr1<As1: Copy> = &S1;
 
 static _sdef: impl Tr1<As1: Copy> = S1;
 //~^ ERROR associated type bounds are unstable
-//~| ERROR `impl Trait` only allowed in function and inherent method return types
+//~| ERROR `impl Trait` only allowed in function and inherent method argument and return types
 // FIXME: uncomment when `impl_trait_in_bindings` feature is fixed.
 // static _sdef_dyn: &dyn Tr1<As1: Copy> = &S1;
 
 fn main() {
     let _: impl Tr1<As1: Copy> = S1;
     //~^ ERROR associated type bounds are unstable
-    //~| ERROR `impl Trait` only allowed in function and inherent method return types
+    //~| ERROR `impl Trait` only allowed in function and inherent method argument and return types
     // FIXME: uncomment when `impl_trait_in_bindings` feature is fixed.
     // let _: &dyn Tr1<As1: Copy> = &S1;
 }
diff --git a/tests/ui/feature-gates/feature-gate-associated_type_bounds.stderr b/tests/ui/feature-gates/feature-gate-associated_type_bounds.stderr
index 4233a8af9b6..f2bceda9bea 100644
--- a/tests/ui/feature-gates/feature-gate-associated_type_bounds.stderr
+++ b/tests/ui/feature-gates/feature-gate-associated_type_bounds.stderr
@@ -115,19 +115,19 @@ LL |     let _: impl Tr1<As1: Copy> = S1;
    = note: see issue #52662 <https://github.com/rust-lang/rust/issues/52662> for more information
    = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in const types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in const types
   --> $DIR/feature-gate-associated_type_bounds.rs:55:14
    |
 LL | const _cdef: impl Tr1<As1: Copy> = S1;
    |              ^^^^^^^^^^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in const types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in const types
   --> $DIR/feature-gate-associated_type_bounds.rs:61:15
    |
 LL | static _sdef: impl Tr1<As1: Copy> = S1;
    |               ^^^^^^^^^^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/feature-gate-associated_type_bounds.rs:68:12
    |
 LL |     let _: impl Tr1<As1: Copy> = S1;
diff --git a/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.rs b/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.rs
index 0db8088f7ee..1b9530fa82f 100644
--- a/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.rs
+++ b/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.rs
@@ -1,6 +1,6 @@
 fn f() -> impl Fn() -> impl Sized { || () }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return
 fn g() -> &'static dyn Fn() -> impl Sized { &|| () }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return
 
 fn main() {}
diff --git a/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.stderr b/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.stderr
index c8c3e13d7fc..f0c0cd040e0 100644
--- a/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.stderr
+++ b/tests/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return types
   --> $DIR/feature-gate-impl_trait_in_fn_trait_return.rs:1:24
    |
 LL | fn f() -> impl Fn() -> impl Sized { || () }
@@ -7,7 +7,7 @@ LL | fn f() -> impl Fn() -> impl Sized { || () }
    = note: see issue #99697 <https://github.com/rust-lang/rust/issues/99697> for more information
    = help: add `#![feature(impl_trait_in_fn_trait_return)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return types
   --> $DIR/feature-gate-impl_trait_in_fn_trait_return.rs:3:32
    |
 LL | fn g() -> &'static dyn Fn() -> impl Sized { &|| () }
diff --git a/tests/ui/feature-gates/feature-gate-lint-reasons.stderr b/tests/ui/feature-gates/feature-gate-lint-reasons.stderr
index 12793c7a28f..6d49b7ed2cd 100644
--- a/tests/ui/feature-gates/feature-gate-lint-reasons.stderr
+++ b/tests/ui/feature-gates/feature-gate-lint-reasons.stderr
@@ -15,6 +15,7 @@ LL | #![warn(nonstandard_style, reason = "the standard should be respected")]
    |
    = note: see issue #54503 <https://github.com/rust-lang/rust/issues/54503> for more information
    = help: add `#![feature(lint_reasons)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/feature-gates/feature-gate-multiple_supertrait_upcastable.stderr b/tests/ui/feature-gates/feature-gate-multiple_supertrait_upcastable.stderr
index 1f725f35417..5e14bf6397f 100644
--- a/tests/ui/feature-gates/feature-gate-multiple_supertrait_upcastable.stderr
+++ b/tests/ui/feature-gates/feature-gate-multiple_supertrait_upcastable.stderr
@@ -25,6 +25,7 @@ LL | #![deny(multiple_supertrait_upcastable)]
    |
    = note: the `multiple_supertrait_upcastable` lint is unstable
    = help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `multiple_supertrait_upcastable`
   --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:7:1
@@ -34,6 +35,7 @@ LL | #![warn(multiple_supertrait_upcastable)]
    |
    = note: the `multiple_supertrait_upcastable` lint is unstable
    = help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `multiple_supertrait_upcastable`
   --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:3:1
@@ -43,6 +45,7 @@ LL | #![deny(multiple_supertrait_upcastable)]
    |
    = note: the `multiple_supertrait_upcastable` lint is unstable
    = help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `multiple_supertrait_upcastable`
   --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:7:1
@@ -52,6 +55,7 @@ LL | #![warn(multiple_supertrait_upcastable)]
    |
    = note: the `multiple_supertrait_upcastable` lint is unstable
    = help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 6 warnings emitted
 
diff --git a/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr b/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr
index fb39c404c20..1c14622d637 100644
--- a/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr
+++ b/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr
@@ -38,6 +38,7 @@ LL |     #[allow(non_exhaustive_omitted_patterns)]
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
   --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:29:9
@@ -58,6 +59,7 @@ LL | #![deny(non_exhaustive_omitted_patterns)]
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
   --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:6:1
@@ -68,6 +70,7 @@ LL | #![allow(non_exhaustive_omitted_patterns)]
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
   --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:15:5
@@ -78,6 +81,7 @@ LL |     #[allow(non_exhaustive_omitted_patterns)]
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
   --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:15:5
@@ -88,6 +92,7 @@ LL |     #[allow(non_exhaustive_omitted_patterns)]
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
   --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:29:9
@@ -98,6 +103,7 @@ LL |         #[warn(non_exhaustive_omitted_patterns)]
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0004]: non-exhaustive patterns: `Foo::C` not covered
   --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:20:11
diff --git a/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs b/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs
index 637765fff11..a8d6365ca79 100644
--- a/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs
+++ b/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs
@@ -5,14 +5,14 @@
 #![feature(async_fn_in_trait)]
 
 trait Foo {
-    fn bar() -> impl Sized; //~ ERROR `impl Trait` only allowed in function and inherent method return types, not in trait method return
-    fn baz() -> Box<impl std::fmt::Display>; //~ ERROR `impl Trait` only allowed in function and inherent method return types, not in trait method return
+    fn bar() -> impl Sized; //~ ERROR `impl Trait` only allowed in function and inherent method argument and return types, not in trait method return
+    fn baz() -> Box<impl std::fmt::Display>; //~ ERROR `impl Trait` only allowed in function and inherent method argument and return types, not in trait method return
 }
 
 // Both return_position_impl_trait_in_trait and async_fn_in_trait are required for this (see also
 // feature-gate-async_fn_in_trait.rs)
 trait AsyncFoo {
-    async fn bar() -> impl Sized; //~ ERROR `impl Trait` only allowed in function and inherent method return types, not in trait method return
+    async fn bar() -> impl Sized; //~ ERROR `impl Trait` only allowed in function and inherent method argument and return types, not in trait method return
 }
 
 fn main() {}
diff --git a/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.stderr b/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.stderr
index 0082b6fafee..86f138fabdb 100644
--- a/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.stderr
+++ b/tests/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait method return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in trait method return types
   --> $DIR/feature-gate-return_position_impl_trait_in_trait.rs:8:17
    |
 LL |     fn bar() -> impl Sized;
@@ -7,7 +7,7 @@ LL |     fn bar() -> impl Sized;
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
    = help: add `#![feature(return_position_impl_trait_in_trait)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait method return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in trait method return types
   --> $DIR/feature-gate-return_position_impl_trait_in_trait.rs:9:21
    |
 LL |     fn baz() -> Box<impl std::fmt::Display>;
@@ -16,7 +16,7 @@ LL |     fn baz() -> Box<impl std::fmt::Display>;
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
    = help: add `#![feature(return_position_impl_trait_in_trait)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait method return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in trait method return types
   --> $DIR/feature-gate-return_position_impl_trait_in_trait.rs:15:23
    |
 LL |     async fn bar() -> impl Sized;
diff --git a/tests/ui/feature-gates/feature-gate-return_type_notation.cfg.stderr b/tests/ui/feature-gates/feature-gate-return_type_notation.cfg.stderr
index 1bdb2574ead..f6230b76463 100644
--- a/tests/ui/feature-gates/feature-gate-return_type_notation.cfg.stderr
+++ b/tests/ui/feature-gates/feature-gate-return_type_notation.cfg.stderr
@@ -1,5 +1,5 @@
 error[E0658]: return type notation is experimental
-  --> $DIR/feature-gate-return_type_notation.rs:14:17
+  --> $DIR/feature-gate-return_type_notation.rs:15:17
    |
 LL | fn foo<T: Trait<m(): Send>>() {}
    |                 ^^^^^^^^^
@@ -8,7 +8,7 @@ LL | fn foo<T: Trait<m(): Send>>() {}
    = help: add `#![feature(return_type_notation)]` to the crate attributes to enable
 
 error: parenthesized generic arguments cannot be used in associated type constraints
-  --> $DIR/feature-gate-return_type_notation.rs:14:17
+  --> $DIR/feature-gate-return_type_notation.rs:15:17
    |
 LL | fn foo<T: Trait<m(): Send>>() {}
    |                 ^--
@@ -16,7 +16,7 @@ LL | fn foo<T: Trait<m(): Send>>() {}
    |                  help: remove these parentheses
 
 error[E0220]: associated type `m` not found for `Trait`
-  --> $DIR/feature-gate-return_type_notation.rs:14:17
+  --> $DIR/feature-gate-return_type_notation.rs:15:17
    |
 LL | fn foo<T: Trait<m(): Send>>() {}
    |                 ^ associated type `m` not found
diff --git a/tests/ui/feature-gates/feature-gate-return_type_notation.no.stderr b/tests/ui/feature-gates/feature-gate-return_type_notation.no.stderr
index dd6ebb61038..c7f52d7cddc 100644
--- a/tests/ui/feature-gates/feature-gate-return_type_notation.no.stderr
+++ b/tests/ui/feature-gates/feature-gate-return_type_notation.no.stderr
@@ -1,5 +1,5 @@
 warning: return type notation is experimental
-  --> $DIR/feature-gate-return_type_notation.rs:14:17
+  --> $DIR/feature-gate-return_type_notation.rs:15:17
    |
 LL | fn foo<T: Trait<m(): Send>>() {}
    |                 ^^^^^^^^^
diff --git a/tests/ui/feature-gates/feature-gate-return_type_notation.rs b/tests/ui/feature-gates/feature-gate-return_type_notation.rs
index ae12495b5dc..c0c285cef3c 100644
--- a/tests/ui/feature-gates/feature-gate-return_type_notation.rs
+++ b/tests/ui/feature-gates/feature-gate-return_type_notation.rs
@@ -7,6 +7,7 @@
 #![feature(async_fn_in_trait)]
 
 trait Trait {
+    #[allow(async_fn_in_trait)]
     async fn m();
 }
 
diff --git a/tests/ui/feature-gates/feature-gate-strict_provenance.stderr b/tests/ui/feature-gates/feature-gate-strict_provenance.stderr
index 751da87cc0d..1e6d762a540 100644
--- a/tests/ui/feature-gates/feature-gate-strict_provenance.stderr
+++ b/tests/ui/feature-gates/feature-gate-strict_provenance.stderr
@@ -28,6 +28,7 @@ LL | #![deny(fuzzy_provenance_casts)]
    = note: the `fuzzy_provenance_casts` lint is unstable
    = note: see issue #95228 <https://github.com/rust-lang/rust/issues/95228> for more information
    = help: add `#![feature(strict_provenance)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `lossy_provenance_casts`
   --> $DIR/feature-gate-strict_provenance.rs:7:1
@@ -38,6 +39,7 @@ LL | #![deny(lossy_provenance_casts)]
    = note: the `lossy_provenance_casts` lint is unstable
    = note: see issue #95228 <https://github.com/rust-lang/rust/issues/95228> for more information
    = help: add `#![feature(strict_provenance)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `fuzzy_provenance_casts`
   --> $DIR/feature-gate-strict_provenance.rs:3:1
@@ -48,6 +50,7 @@ LL | #![deny(fuzzy_provenance_casts)]
    = note: the `fuzzy_provenance_casts` lint is unstable
    = note: see issue #95228 <https://github.com/rust-lang/rust/issues/95228> for more information
    = help: add `#![feature(strict_provenance)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `lossy_provenance_casts`
   --> $DIR/feature-gate-strict_provenance.rs:7:1
@@ -58,6 +61,7 @@ LL | #![deny(lossy_provenance_casts)]
    = note: the `lossy_provenance_casts` lint is unstable
    = note: see issue #95228 <https://github.com/rust-lang/rust/issues/95228> for more information
    = help: add `#![feature(strict_provenance)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 6 warnings emitted
 
diff --git a/tests/ui/feature-gates/feature-gate-test_unstable_lint.stderr b/tests/ui/feature-gates/feature-gate-test_unstable_lint.stderr
index b4d6aa658e1..562aa478a93 100644
--- a/tests/ui/feature-gates/feature-gate-test_unstable_lint.stderr
+++ b/tests/ui/feature-gates/feature-gate-test_unstable_lint.stderr
@@ -16,6 +16,7 @@ LL | #![allow(test_unstable_lint)]
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `test_unstable_lint`
   --> $DIR/feature-gate-test_unstable_lint.rs:4:1
@@ -25,6 +26,7 @@ LL | #![allow(test_unstable_lint)]
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/feature-gates/feature-gate-type_privacy_lints.stderr b/tests/ui/feature-gates/feature-gate-type_privacy_lints.stderr
index 4349fea6f89..2614f2b3c35 100644
--- a/tests/ui/feature-gates/feature-gate-type_privacy_lints.stderr
+++ b/tests/ui/feature-gates/feature-gate-type_privacy_lints.stderr
@@ -18,6 +18,7 @@ LL | #![warn(unnameable_types)]
    = note: the `unnameable_types` lint is unstable
    = note: see issue #48054 <https://github.com/rust-lang/rust/issues/48054> for more information
    = help: add `#![feature(type_privacy_lints)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `unnameable_types`
   --> $DIR/feature-gate-type_privacy_lints.rs:3:1
@@ -28,6 +29,7 @@ LL | #![warn(unnameable_types)]
    = note: the `unnameable_types` lint is unstable
    = note: see issue #48054 <https://github.com/rust-lang/rust/issues/48054> for more information
    = help: add `#![feature(type_privacy_lints)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/feature-gates/issue-43106-gating-of-derive-2.stderr b/tests/ui/feature-gates/issue-43106-gating-of-derive-2.stderr
index ab165917344..1e47259cb7e 100644
--- a/tests/ui/feature-gates/issue-43106-gating-of-derive-2.stderr
+++ b/tests/ui/feature-gates/issue-43106-gating-of-derive-2.stderr
@@ -9,6 +9,8 @@ error: cannot find derive macro `x3300` in this scope
    |
 LL |     #[derive(x3300)]
    |              ^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot find derive macro `x3300` in this scope
   --> $DIR/issue-43106-gating-of-derive-2.rs:9:14
@@ -21,6 +23,8 @@ error: cannot find derive macro `x3300` in this scope
    |
 LL |     #[derive(x3300)]
    |              ^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot find derive macro `x3300` in this scope
   --> $DIR/issue-43106-gating-of-derive-2.rs:4:14
@@ -33,6 +37,8 @@ error: cannot find derive macro `x3300` in this scope
    |
 LL |     #[derive(x3300)]
    |              ^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/for/issue-20605.next.stderr b/tests/ui/for/issue-20605.next.stderr
index 0955efdbb73..28dbdf4c374 100644
--- a/tests/ui/for/issue-20605.next.stderr
+++ b/tests/ui/for/issue-20605.next.stderr
@@ -44,12 +44,6 @@ LL |     for item in *things { *item = 0 }
    = note: all local variables must have a statically known size
    = help: unsized locals are gated as an unstable feature
 
-error: the type `Option<<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item>` is not well-formed
-  --> $DIR/issue-20605.rs:5:17
-   |
-LL |     for item in *things { *item = 0 }
-   |                 ^^^^^^^
-
 error[E0277]: the size for values of type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be known at compilation time
   --> $DIR/issue-20605.rs:5:5
    |
@@ -60,6 +54,12 @@ LL |     for item in *things { *item = 0 }
 note: required by a bound in `None`
   --> $SRC_DIR/core/src/option.rs:LL:COL
 
+error: the type `Option<<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item>` is not well-formed
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^
+
 error[E0614]: type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be dereferenced
   --> $DIR/issue-20605.rs:5:27
    |
diff --git a/tests/ui/generic-associated-types/bugs/issue-91762.stderr b/tests/ui/generic-associated-types/bugs/issue-91762.stderr
index 1272c8b8ae2..1045e80f046 100644
--- a/tests/ui/generic-associated-types/bugs/issue-91762.stderr
+++ b/tests/ui/generic-associated-types/bugs/issue-91762.stderr
@@ -1,9 +1,10 @@
-error[E0282]: type annotations needed
+error[E0284]: type annotations needed
   --> $DIR/issue-91762.rs:24:15
    |
 LL |         ret = <Self::Base as Functor>::fmap(arg);
    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the associated function `fmap`
    |
+   = note: cannot satisfy `<<Self as FunctorExt<T>>::Base as Functor>::With<_> == Self`
 help: consider specifying the generic arguments
    |
 LL |         ret = <Self::Base as Functor>::fmap::<T, U>(arg);
@@ -11,4 +12,4 @@ LL |         ret = <Self::Base as Functor>::fmap::<T, U>(arg);
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0284`.
diff --git a/tests/ui/generic-associated-types/gat-trait-path-missing-lifetime.stderr b/tests/ui/generic-associated-types/gat-trait-path-missing-lifetime.stderr
index 499221637ba..7f535ec432c 100644
--- a/tests/ui/generic-associated-types/gat-trait-path-missing-lifetime.stderr
+++ b/tests/ui/generic-associated-types/gat-trait-path-missing-lifetime.stderr
@@ -25,6 +25,7 @@ note: associated type defined here, with 1 lifetime parameter: `'a`
    |
 LL |   type Y<'a>;
    |        ^ --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |   fn foo<'a, T1: X<Y<'a> = T1>>(t : T1) -> T1::Y<'a> {
diff --git a/tests/ui/generic-associated-types/issue-91139.stderr b/tests/ui/generic-associated-types/issue-91139.stderr
index d9d76adfbb5..89a4ba77e4e 100644
--- a/tests/ui/generic-associated-types/issue-91139.stderr
+++ b/tests/ui/generic-associated-types/issue-91139.stderr
@@ -9,6 +9,8 @@ error: `T` does not live long enough
    |
 LL |     let _: for<'a> fn(<() as Foo<T>>::Type<'a>, &'a T) = |_, _| ();
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/generic-const-items/inference-failure.stderr b/tests/ui/generic-const-items/inference-failure.stderr
index 22ff1b9ba7f..10ecd83ec53 100644
--- a/tests/ui/generic-const-items/inference-failure.stderr
+++ b/tests/ui/generic-const-items/inference-failure.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `Option<T>`
   --> $DIR/inference-failure.rs:8:9
    |
 LL |     let _ = NONE;
-   |         ^
+   |         ^   ---- type must be known at this point
    |
 help: consider giving this pattern a type, where the type for type parameter `T` is specified
    |
diff --git a/tests/ui/generic-const-items/unsatisfied-bounds.stderr b/tests/ui/generic-const-items/unsatisfied-bounds.stderr
index 2cee53431a4..14894cef770 100644
--- a/tests/ui/generic-const-items/unsatisfied-bounds.stderr
+++ b/tests/ui/generic-const-items/unsatisfied-bounds.stderr
@@ -17,6 +17,7 @@ LL |     let () = K::<()>;
    |                  ^^ the trait `From<()>` is not implemented for `Infallible`
    |
    = help: the trait `From<!>` is implemented for `Infallible`
+   = help: for that trait implementation, expected `!`, found `()`
 note: required by a bound in `K`
   --> $DIR/unsatisfied-bounds.rs:12:17
    |
@@ -48,6 +49,7 @@ LL |     let _ = <() as Trait<&'static str>>::B::<()>;
    |                                              ^^ the trait `From<()>` is not implemented for `Infallible`
    |
    = help: the trait `From<!>` is implemented for `Infallible`
+   = help: for that trait implementation, expected `!`, found `()`
 note: required by a bound in `Trait::B`
   --> $DIR/unsatisfied-bounds.rs:21:21
    |
diff --git a/tests/ui/higher-ranked/subtype/hr-subtype.bound_inv_a_b_vs_bound_inv_a.stderr b/tests/ui/higher-ranked/subtype/hr-subtype.bound_inv_a_b_vs_bound_inv_a.stderr
index a73c03feb87..48703186cc6 100644
--- a/tests/ui/higher-ranked/subtype/hr-subtype.bound_inv_a_b_vs_bound_inv_a.stderr
+++ b/tests/ui/higher-ranked/subtype/hr-subtype.bound_inv_a_b_vs_bound_inv_a.stderr
@@ -24,6 +24,7 @@ LL | | for<'a>    fn(Inv<'a>, Inv<'a>)) }
    |
    = note: expected enum `Option<for<'a, 'b> fn(Inv<'a>, Inv<'b>)>`
               found enum `Option<for<'a> fn(Inv<'a>, Inv<'a>)>`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this error originates in the macro `check` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 2 previous errors
diff --git a/tests/ui/higher-ranked/trait-bounds/hrtb-conflate-regions.stderr b/tests/ui/higher-ranked/trait-bounds/hrtb-conflate-regions.stderr
index 46f5308dd87..69c58c5919e 100644
--- a/tests/ui/higher-ranked/trait-bounds/hrtb-conflate-regions.stderr
+++ b/tests/ui/higher-ranked/trait-bounds/hrtb-conflate-regions.stderr
@@ -15,6 +15,7 @@ LL | fn b() { want_foo2::<SomeStruct>(); }
    |
    = note: `SomeStruct` must implement `Foo<(&'0 isize, &'1 isize)>`, for any two lifetimes `'0` and `'1`...
    = note: ...but it actually implements `Foo<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/impl-trait/cross-return-site-inference.rs b/tests/ui/impl-trait/cross-return-site-inference.rs
index 00aed2ad95a..e1071b08c55 100644
--- a/tests/ui/impl-trait/cross-return-site-inference.rs
+++ b/tests/ui/impl-trait/cross-return-site-inference.rs
@@ -36,13 +36,13 @@ fn muh() -> Result<(), impl std::fmt::Debug> {
 
 fn muh2() -> Result<(), impl std::fmt::Debug> {
     return Err(From::from("foo"));
-    //~^ ERROR type annotations needed
+    //~^ ERROR cannot call associated function on trait
     Ok(())
 }
 
 fn muh3() -> Result<(), impl std::fmt::Debug> {
     Err(From::from("foo"))
-    //~^ ERROR type annotations needed
+    //~^ ERROR cannot call associated function on trait
 }
 
 fn main() {}
diff --git a/tests/ui/impl-trait/cross-return-site-inference.stderr b/tests/ui/impl-trait/cross-return-site-inference.stderr
index 766614e9e50..8ee3e9abf9c 100644
--- a/tests/ui/impl-trait/cross-return-site-inference.stderr
+++ b/tests/ui/impl-trait/cross-return-site-inference.stderr
@@ -9,28 +9,29 @@ help: consider specifying the generic arguments
 LL |     Ok::<(), E>(())
    |       +++++++++
 
-error[E0282]: type annotations needed
-  --> $DIR/cross-return-site-inference.rs:38:12
+error[E0790]: cannot call associated function on trait without specifying the corresponding `impl` type
+  --> $DIR/cross-return-site-inference.rs:38:16
    |
 LL |     return Err(From::from("foo"));
-   |            ^^^ cannot infer type of the type parameter `E` declared on the enum `Result`
+   |                ^^^^^^^^^^ cannot call associated function of trait
    |
-help: consider specifying the generic arguments
+help: use a fully-qualified path to a specific available implementation
    |
-LL |     return Err::<(), E>(From::from("foo"));
-   |               +++++++++
+LL |     return Err(</* self type */ as From>::from("foo"));
+   |                +++++++++++++++++++     +
 
-error[E0282]: type annotations needed
-  --> $DIR/cross-return-site-inference.rs:44:5
+error[E0790]: cannot call associated function on trait without specifying the corresponding `impl` type
+  --> $DIR/cross-return-site-inference.rs:44:9
    |
 LL |     Err(From::from("foo"))
-   |     ^^^ cannot infer type of the type parameter `E` declared on the enum `Result`
+   |         ^^^^^^^^^^ cannot call associated function of trait
    |
-help: consider specifying the generic arguments
+help: use a fully-qualified path to a specific available implementation
    |
-LL |     Err::<(), E>(From::from("foo"))
-   |        +++++++++
+LL |     Err(</* self type */ as From>::from("foo"))
+   |         +++++++++++++++++++     +
 
 error: aborting due to 3 previous errors
 
-For more information about this error, try `rustc --explain E0282`.
+Some errors have detailed explanations: E0282, E0790.
+For more information about an error, try `rustc --explain E0282`.
diff --git a/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr b/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr
index fad0b812d43..d3c2d5d5b9f 100644
--- a/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr
+++ b/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr
@@ -20,6 +20,7 @@ LL | fn ice() -> impl AsRef<Fn(&())> {
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | fn ice() -> impl AsRef<dyn Fn(&())> {
@@ -33,6 +34,7 @@ LL | fn ice() -> impl AsRef<Fn(&())> {
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | fn ice() -> impl AsRef<dyn Fn(&())> {
diff --git a/tests/ui/impl-trait/impl-subtyper.rs b/tests/ui/impl-trait/impl-subtyper.rs
new file mode 100644
index 00000000000..2d99cdd4f50
--- /dev/null
+++ b/tests/ui/impl-trait/impl-subtyper.rs
@@ -0,0 +1,18 @@
+// check-pass
+
+#![crate_type = "lib"]
+fn checkpoints() -> impl Iterator {
+    Some(()).iter().flat_map(|_| std::iter::once(()))
+}
+
+fn block_checkpoints() -> impl Iterator {
+    checkpoints()
+}
+
+fn iter_raw() -> impl Iterator {
+    let mut iter = block_checkpoints();
+
+    (0..9).map(move |_| {
+        iter.next();
+    })
+}
diff --git a/tests/ui/impl-trait/impl-subtyper2.rs b/tests/ui/impl-trait/impl-subtyper2.rs
new file mode 100644
index 00000000000..2e0acbae68b
--- /dev/null
+++ b/tests/ui/impl-trait/impl-subtyper2.rs
@@ -0,0 +1,7 @@
+// check-pass
+
+fn ages() -> Option<impl Iterator> {
+    None::<std::slice::Iter<()>>
+}
+
+fn main(){}
diff --git a/tests/ui/impl-trait/in-trait/assumed-wf-bounds-in-impl.rs b/tests/ui/impl-trait/in-trait/assumed-wf-bounds-in-impl.rs
index 2a61c5cc8df..5de9c01e3e0 100644
--- a/tests/ui/impl-trait/in-trait/assumed-wf-bounds-in-impl.rs
+++ b/tests/ui/impl-trait/in-trait/assumed-wf-bounds-in-impl.rs
@@ -9,6 +9,7 @@ trait AsyncLendingIterator {
     where
         Self: 'a;
 
+    #[allow(async_fn_in_trait)]
     async fn next(&mut self) -> Option<Self::Item<'_>>;
 }
 
diff --git a/tests/ui/impl-trait/in-trait/default-body-with-rpit.rs b/tests/ui/impl-trait/in-trait/default-body-with-rpit.rs
index 25133214dc6..9c60cf4e72a 100644
--- a/tests/ui/impl-trait/in-trait/default-body-with-rpit.rs
+++ b/tests/ui/impl-trait/in-trait/default-body-with-rpit.rs
@@ -7,6 +7,7 @@
 use std::fmt::Debug;
 
 trait Foo {
+    #[allow(async_fn_in_trait)]
     async fn baz(&self) -> impl Debug {
         ""
     }
diff --git a/tests/ui/impl-trait/in-trait/default-body.rs b/tests/ui/impl-trait/in-trait/default-body.rs
index b0baf5bb10d..d3ea9fbeabc 100644
--- a/tests/ui/impl-trait/in-trait/default-body.rs
+++ b/tests/ui/impl-trait/in-trait/default-body.rs
@@ -7,6 +7,7 @@
 use std::fmt::Debug;
 
 trait Foo {
+    #[allow(async_fn_in_trait)]
     async fn baz(&self) -> &str {
         ""
     }
diff --git a/tests/ui/impl-trait/in-trait/early.rs b/tests/ui/impl-trait/in-trait/early.rs
index 9c1c2b50339..bb5718b4934 100644
--- a/tests/ui/impl-trait/in-trait/early.rs
+++ b/tests/ui/impl-trait/in-trait/early.rs
@@ -5,6 +5,7 @@
 #![allow(incomplete_features)]
 
 pub trait Foo {
+    #[allow(async_fn_in_trait)]
     async fn bar<'a: 'a>(&'a mut self);
 }
 
diff --git a/tests/ui/impl-trait/in-trait/refine.rs b/tests/ui/impl-trait/in-trait/refine.rs
index a91f9b3e722..f00478b0bb9 100644
--- a/tests/ui/impl-trait/in-trait/refine.rs
+++ b/tests/ui/impl-trait/in-trait/refine.rs
@@ -45,4 +45,15 @@ impl Late for D {
     //~^ ERROR impl method signature does not match trait method signature
 }
 
+mod unreachable {
+    pub trait UnreachablePub {
+        fn bar() -> impl Sized;
+    }
+
+    struct E;
+    impl UnreachablePub for E {
+        fn bar() {}
+    }
+}
+
 fn main() {}
diff --git a/tests/ui/impl-trait/in-trait/refine.stderr b/tests/ui/impl-trait/in-trait/refine.stderr
index 29aa08e25bb..1d9852c682c 100644
--- a/tests/ui/impl-trait/in-trait/refine.stderr
+++ b/tests/ui/impl-trait/in-trait/refine.stderr
@@ -30,8 +30,8 @@ LL |     fn bar() {}
    = note: add `#[allow(refining_impl_trait)]` if it is intended for this to be part of the public API of this crate
 help: replace the return type so that it matches the trait
    |
-LL |     fn bar() -> impl Sized {}
-   |              +++++++++++++
+LL |     fn bar()-> impl Sized  {}
+   |             +++++++++++++
 
 error: impl trait in impl method signature does not match trait method signature
   --> $DIR/refine.rs:22:17
diff --git a/tests/ui/impl-trait/in-trait/suggest-missing-item.fixed b/tests/ui/impl-trait/in-trait/suggest-missing-item.fixed
index d9f775a6c84..58d83384a23 100644
--- a/tests/ui/impl-trait/in-trait/suggest-missing-item.fixed
+++ b/tests/ui/impl-trait/in-trait/suggest-missing-item.fixed
@@ -4,12 +4,15 @@
 #![feature(async_fn_in_trait, return_position_impl_trait_in_trait)]
 
 trait Trait {
+    #[allow(async_fn_in_trait)]
     async fn foo();
 
+    #[allow(async_fn_in_trait)]
     async fn bar() -> i32;
 
     fn test(&self) -> impl Sized + '_;
 
+    #[allow(async_fn_in_trait)]
     async fn baz(&self) -> &i32;
 }
 
diff --git a/tests/ui/impl-trait/in-trait/suggest-missing-item.rs b/tests/ui/impl-trait/in-trait/suggest-missing-item.rs
index 26979b5149b..c27229806e1 100644
--- a/tests/ui/impl-trait/in-trait/suggest-missing-item.rs
+++ b/tests/ui/impl-trait/in-trait/suggest-missing-item.rs
@@ -4,12 +4,15 @@
 #![feature(async_fn_in_trait, return_position_impl_trait_in_trait)]
 
 trait Trait {
+    #[allow(async_fn_in_trait)]
     async fn foo();
 
+    #[allow(async_fn_in_trait)]
     async fn bar() -> i32;
 
     fn test(&self) -> impl Sized + '_;
 
+    #[allow(async_fn_in_trait)]
     async fn baz(&self) -> &i32;
 }
 
diff --git a/tests/ui/impl-trait/in-trait/suggest-missing-item.stderr b/tests/ui/impl-trait/in-trait/suggest-missing-item.stderr
index 44f98896eb3..29f6bad86dc 100644
--- a/tests/ui/impl-trait/in-trait/suggest-missing-item.stderr
+++ b/tests/ui/impl-trait/in-trait/suggest-missing-item.stderr
@@ -1,15 +1,15 @@
 error[E0046]: not all trait items implemented, missing: `foo`, `bar`, `test`, `baz`
-  --> $DIR/suggest-missing-item.rs:18:1
+  --> $DIR/suggest-missing-item.rs:21:1
    |
 LL |     async fn foo();
    |     --------------- `foo` from trait
-LL |
+...
 LL |     async fn bar() -> i32;
    |     ---------------------- `bar` from trait
 LL |
 LL |     fn test(&self) -> impl Sized + '_;
    |     ---------------------------------- `test` from trait
-LL |
+...
 LL |     async fn baz(&self) -> &i32;
    |     ---------------------------- `baz` from trait
 ...
diff --git a/tests/ui/impl-trait/issue-55872-2.stderr b/tests/ui/impl-trait/issue-55872-2.stderr
index 3e70f1cf800..b5b7f293a40 100644
--- a/tests/ui/impl-trait/issue-55872-2.stderr
+++ b/tests/ui/impl-trait/issue-55872-2.stderr
@@ -9,6 +9,8 @@ error: type parameter `T` is part of concrete type but not used in parameter lis
    |
 LL |         async {}
    |         ^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/impl-trait/issues/issue-54600.rs b/tests/ui/impl-trait/issues/issue-54600.rs
index 3024fedf7b5..ccf2767012e 100644
--- a/tests/ui/impl-trait/issues/issue-54600.rs
+++ b/tests/ui/impl-trait/issues/issue-54600.rs
@@ -2,6 +2,6 @@ use std::fmt::Debug;
 
 fn main() {
     let x: Option<impl Debug> = Some(44_u32);
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
     println!("{:?}", x);
 }
diff --git a/tests/ui/impl-trait/issues/issue-54600.stderr b/tests/ui/impl-trait/issues/issue-54600.stderr
index 7ef063af952..9a8e3675b95 100644
--- a/tests/ui/impl-trait/issues/issue-54600.stderr
+++ b/tests/ui/impl-trait/issues/issue-54600.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-54600.rs:4:19
    |
 LL |     let x: Option<impl Debug> = Some(44_u32);
diff --git a/tests/ui/impl-trait/issues/issue-54840.rs b/tests/ui/impl-trait/issues/issue-54840.rs
index 8f1e0ece03a..910d23f1d93 100644
--- a/tests/ui/impl-trait/issues/issue-54840.rs
+++ b/tests/ui/impl-trait/issues/issue-54840.rs
@@ -3,5 +3,5 @@ use std::ops::Add;
 fn main() {
     let i: i32 = 0;
     let j: &impl Add = &i;
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
 }
diff --git a/tests/ui/impl-trait/issues/issue-54840.stderr b/tests/ui/impl-trait/issues/issue-54840.stderr
index 1d1316f0e11..67cabf44950 100644
--- a/tests/ui/impl-trait/issues/issue-54840.stderr
+++ b/tests/ui/impl-trait/issues/issue-54840.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-54840.rs:5:13
    |
 LL |     let j: &impl Add = &i;
diff --git a/tests/ui/impl-trait/issues/issue-58504.rs b/tests/ui/impl-trait/issues/issue-58504.rs
index e5865d0dfff..f1d7b94ef2d 100644
--- a/tests/ui/impl-trait/issues/issue-58504.rs
+++ b/tests/ui/impl-trait/issues/issue-58504.rs
@@ -8,5 +8,5 @@ fn mk_gen() -> impl Generator<Return=!, Yield=()> {
 
 fn main() {
     let gens: [impl Generator<Return=!, Yield=()>;2] = [ mk_gen(), mk_gen() ];
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
 }
diff --git a/tests/ui/impl-trait/issues/issue-58504.stderr b/tests/ui/impl-trait/issues/issue-58504.stderr
index 26ec2a4f9cf..1be676ee075 100644
--- a/tests/ui/impl-trait/issues/issue-58504.stderr
+++ b/tests/ui/impl-trait/issues/issue-58504.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-58504.rs:10:16
    |
 LL |     let gens: [impl Generator<Return=!, Yield=()>;2] = [ mk_gen(), mk_gen() ];
diff --git a/tests/ui/impl-trait/issues/issue-58956.rs b/tests/ui/impl-trait/issues/issue-58956.rs
index 68cfcd9ba4f..5d5566860c0 100644
--- a/tests/ui/impl-trait/issues/issue-58956.rs
+++ b/tests/ui/impl-trait/issues/issue-58956.rs
@@ -5,9 +5,9 @@ impl Lam for B {}
 pub struct Wrap<T>(T);
 
 const _A: impl Lam = {
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
     let x: Wrap<impl Lam> = Wrap(B);
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
     x.0
 };
 
diff --git a/tests/ui/impl-trait/issues/issue-58956.stderr b/tests/ui/impl-trait/issues/issue-58956.stderr
index 2b4d0abdffc..5ee33352afa 100644
--- a/tests/ui/impl-trait/issues/issue-58956.stderr
+++ b/tests/ui/impl-trait/issues/issue-58956.stderr
@@ -1,10 +1,10 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in const types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in const types
   --> $DIR/issue-58956.rs:7:11
    |
 LL | const _A: impl Lam = {
    |           ^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-58956.rs:9:17
    |
 LL |     let x: Wrap<impl Lam> = Wrap(B);
diff --git a/tests/ui/impl-trait/issues/issue-62742.stderr b/tests/ui/impl-trait/issues/issue-62742.stderr
index d872291c870..8d969e8e0f3 100644
--- a/tests/ui/impl-trait/issues/issue-62742.stderr
+++ b/tests/ui/impl-trait/issues/issue-62742.stderr
@@ -4,7 +4,7 @@ error[E0277]: the trait bound `RawImpl<_>: Raw<_>` is not satisfied
 LL |     WrongImpl::foo(0i32);
    |     ^^^^^^^^^ the trait `Raw<_>` is not implemented for `RawImpl<_>`
    |
-   = help: the trait `Raw<[T]>` is implemented for `RawImpl<T>`
+   = help: the trait `Raw<[_]>` is implemented for `RawImpl<_>`
 note: required by a bound in `SafeImpl`
   --> $DIR/issue-62742.rs:26:35
    |
@@ -42,7 +42,8 @@ error[E0277]: the trait bound `RawImpl<()>: Raw<()>` is not satisfied
 LL |     WrongImpl::<()>::foo(0i32);
    |     ^^^^^^^^^^^^^^^ the trait `Raw<()>` is not implemented for `RawImpl<()>`
    |
-   = help: the trait `Raw<[T]>` is implemented for `RawImpl<T>`
+   = help: the trait `Raw<[()]>` is implemented for `RawImpl<()>`
+   = help: for that trait implementation, expected `[()]`, found `()`
 note: required by a bound in `SafeImpl`
   --> $DIR/issue-62742.rs:26:35
    |
diff --git a/tests/ui/impl-trait/issues/issue-70971.rs b/tests/ui/impl-trait/issues/issue-70971.rs
index f8ae18bacd6..c24259a71eb 100644
--- a/tests/ui/impl-trait/issues/issue-70971.rs
+++ b/tests/ui/impl-trait/issues/issue-70971.rs
@@ -1,4 +1,4 @@
 fn main() {
     let x : (impl Copy,) = (true,);
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
 }
diff --git a/tests/ui/impl-trait/issues/issue-70971.stderr b/tests/ui/impl-trait/issues/issue-70971.stderr
index d066256bfb0..5609f8b9b01 100644
--- a/tests/ui/impl-trait/issues/issue-70971.stderr
+++ b/tests/ui/impl-trait/issues/issue-70971.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-70971.rs:2:14
    |
 LL |     let x : (impl Copy,) = (true,);
diff --git a/tests/ui/impl-trait/issues/issue-79099.rs b/tests/ui/impl-trait/issues/issue-79099.rs
index da53594f3d0..22c66491ce9 100644
--- a/tests/ui/impl-trait/issues/issue-79099.rs
+++ b/tests/ui/impl-trait/issues/issue-79099.rs
@@ -1,7 +1,7 @@
 struct Bug {
     V1: [(); {
         let f: impl core::future::Future<Output = u8> = async { 1 };
-        //~^ `impl Trait` only allowed in function and inherent method return types
+        //~^ `impl Trait` only allowed in function and inherent method argument and return types
         //~| expected identifier
         1
     }],
diff --git a/tests/ui/impl-trait/issues/issue-79099.stderr b/tests/ui/impl-trait/issues/issue-79099.stderr
index 580250a62fe..82fc03c61b3 100644
--- a/tests/ui/impl-trait/issues/issue-79099.stderr
+++ b/tests/ui/impl-trait/issues/issue-79099.stderr
@@ -9,7 +9,7 @@ LL |         let f: impl core::future::Future<Output = u8> = async { 1 };
    = help: pass `--edition 2021` to `rustc`
    = note: for more on editions, read https://doc.rust-lang.org/edition-guide
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-79099.rs:3:16
    |
 LL |         let f: impl core::future::Future<Output = u8> = async { 1 };
diff --git a/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.rs b/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.rs
index 344f359529b..3224145bffe 100644
--- a/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.rs
+++ b/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.rs
@@ -1,8 +1,8 @@
 struct Foo<T = impl Copy>(T);
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 type Result<T, E = impl std::error::Error> = std::result::Result<T, E>;
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // should not cause ICE
 fn x() -> Foo {
diff --git a/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.stderr b/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.stderr
index 656bd047061..56be4577d51 100644
--- a/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.stderr
+++ b/tests/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.stderr
@@ -1,10 +1,10 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/issue-83929-impl-trait-in-generic-default.rs:1:16
    |
 LL | struct Foo<T = impl Copy>(T);
    |                ^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/issue-83929-impl-trait-in-generic-default.rs:4:20
    |
 LL | type Result<T, E = impl std::error::Error> = std::result::Result<T, E>;
diff --git a/tests/ui/impl-trait/issues/issue-84073.stderr b/tests/ui/impl-trait/issues/issue-84073.stderr
index 3c39aa6ce5b..b4be16ff042 100644
--- a/tests/ui/impl-trait/issues/issue-84073.stderr
+++ b/tests/ui/impl-trait/issues/issue-84073.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `RaceBuilder<T, Never<T>>`
   --> $DIR/issue-84073.rs:32:16
    |
 LL |     Race::new(|race| race.when());
-   |                ^^^^
+   |                ^^^^  ---- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type, where the type for type parameter `T` is specified
    |
diff --git a/tests/ui/impl-trait/issues/issue-84919.rs b/tests/ui/impl-trait/issues/issue-84919.rs
index a0b73743a2b..77d27d7c06b 100644
--- a/tests/ui/impl-trait/issues/issue-84919.rs
+++ b/tests/ui/impl-trait/issues/issue-84919.rs
@@ -3,7 +3,7 @@ impl Trait for () {}
 
 fn foo<'a: 'a>() {
     let _x: impl Trait = ();
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 fn main() {}
diff --git a/tests/ui/impl-trait/issues/issue-84919.stderr b/tests/ui/impl-trait/issues/issue-84919.stderr
index 36010fdef36..20b131b8bd2 100644
--- a/tests/ui/impl-trait/issues/issue-84919.stderr
+++ b/tests/ui/impl-trait/issues/issue-84919.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-84919.rs:5:13
    |
 LL |     let _x: impl Trait = ();
diff --git a/tests/ui/impl-trait/issues/issue-86642.rs b/tests/ui/impl-trait/issues/issue-86642.rs
index e6e95771400..49f8944ac4a 100644
--- a/tests/ui/impl-trait/issues/issue-86642.rs
+++ b/tests/ui/impl-trait/issues/issue-86642.rs
@@ -1,5 +1,5 @@
 static x: impl Fn(&str) -> Result<&str, ()> = move |source| {
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
     let res = (move |source| Ok(source))(source);
     let res = res.or((move |source| Ok(source))(source));
     res
diff --git a/tests/ui/impl-trait/issues/issue-86642.stderr b/tests/ui/impl-trait/issues/issue-86642.stderr
index b6f8a54f35a..6d3be3fff0e 100644
--- a/tests/ui/impl-trait/issues/issue-86642.stderr
+++ b/tests/ui/impl-trait/issues/issue-86642.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in const types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in const types
   --> $DIR/issue-86642.rs:1:11
    |
 LL | static x: impl Fn(&str) -> Result<&str, ()> = move |source| {
diff --git a/tests/ui/impl-trait/issues/issue-87295.rs b/tests/ui/impl-trait/issues/issue-87295.rs
index aeb8f83326e..eb44020ac0e 100644
--- a/tests/ui/impl-trait/issues/issue-87295.rs
+++ b/tests/ui/impl-trait/issues/issue-87295.rs
@@ -14,5 +14,5 @@ impl<F> Struct<F> {
 
 fn main() {
     let _do_not_waste: Struct<impl Trait<Output = i32>> = Struct::new(());
-    //~^ `impl Trait` only allowed in function and inherent method return types
+    //~^ `impl Trait` only allowed in function and inherent method argument and return types
 }
diff --git a/tests/ui/impl-trait/issues/issue-87295.stderr b/tests/ui/impl-trait/issues/issue-87295.stderr
index ec59b719c10..3fe4ee73c80 100644
--- a/tests/ui/impl-trait/issues/issue-87295.stderr
+++ b/tests/ui/impl-trait/issues/issue-87295.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-87295.rs:16:31
    |
 LL |     let _do_not_waste: Struct<impl Trait<Output = i32>> = Struct::new(());
diff --git a/tests/ui/impl-trait/nested_impl_trait.rs b/tests/ui/impl-trait/nested_impl_trait.rs
index e95fab3b650..c036b9e367a 100644
--- a/tests/ui/impl-trait/nested_impl_trait.rs
+++ b/tests/ui/impl-trait/nested_impl_trait.rs
@@ -9,7 +9,7 @@ fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
 
 fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
 //~^ ERROR nested `impl Trait` is not allowed
-//~| `impl Trait` only allowed in function and inherent method return types
+//~| `impl Trait` only allowed in function and inherent method argument and return types
 
 fn bad_in_arg_position(_: impl Into<impl Debug>) { }
 //~^ ERROR nested `impl Trait` is not allowed
diff --git a/tests/ui/impl-trait/nested_impl_trait.stderr b/tests/ui/impl-trait/nested_impl_trait.stderr
index ffe84b8e86f..f1cafd958b0 100644
--- a/tests/ui/impl-trait/nested_impl_trait.stderr
+++ b/tests/ui/impl-trait/nested_impl_trait.stderr
@@ -34,7 +34,7 @@ LL |     fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
    |                                  |         nested `impl Trait` here
    |                                  outer `impl Trait`
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `fn` pointer return types
   --> $DIR/nested_impl_trait.rs:10:32
    |
 LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
diff --git a/tests/ui/impl-trait/opaque-cast-field-access-in-future.stderr b/tests/ui/impl-trait/opaque-cast-field-access-in-future.stderr
index ee4343b110f..2347805343c 100644
--- a/tests/ui/impl-trait/opaque-cast-field-access-in-future.stderr
+++ b/tests/ui/impl-trait/opaque-cast-field-access-in-future.stderr
@@ -1,9 +1,11 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/opaque-cast-field-access-in-future.rs:22:17
    |
 LL | fn run() -> Foo<impl Future<Output = ()>> {
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
+   |
+   = note: cannot satisfy `_: Future`
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/impl-trait/where-allowed-2.stderr b/tests/ui/impl-trait/where-allowed-2.stderr
index 2b328c01c87..b3765ac1a54 100644
--- a/tests/ui/impl-trait/where-allowed-2.stderr
+++ b/tests/ui/impl-trait/where-allowed-2.stderr
@@ -1,9 +1,11 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/where-allowed-2.rs:3:30
    |
 LL | fn in_adt_in_return() -> Vec<impl Debug> { panic!() }
    |                              ^^^^^^^^^^ cannot infer type
+   |
+   = note: cannot satisfy `_: Debug`
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/impl-trait/where-allowed.rs b/tests/ui/impl-trait/where-allowed.rs
index 509d2716649..d3fab326e74 100644
--- a/tests/ui/impl-trait/where-allowed.rs
+++ b/tests/ui/impl-trait/where-allowed.rs
@@ -16,47 +16,47 @@ fn in_adt_in_parameters(_: Vec<impl Debug>) { panic!() }
 
 // Disallowed
 fn in_fn_parameter_in_parameters(_: fn(impl Debug)) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_fn_return_in_parameters(_: fn() -> impl Debug) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_fn_parameter_in_return() -> fn(impl Debug) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_fn_return_in_return() -> fn() -> impl Debug { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_dyn_Fn_parameter_in_parameters(_: &dyn Fn(impl Debug)) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Allowed
 fn in_dyn_Fn_return_in_return() -> &'static dyn Fn() -> impl Debug { panic!() }
 
 // Disallowed
 fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 //~^^ ERROR nested `impl Trait` is not allowed
 
 // Disallowed
 fn in_impl_Fn_return_in_parameters(_: &impl Fn() -> impl Debug) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 //~| ERROR nested `impl Trait` is not allowed
 
 // Allowed
@@ -64,11 +64,11 @@ fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { panic!()
 
 // Disallowed
 fn in_Fn_parameter_in_generics<F: Fn(impl Debug)> (_: F) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 fn in_Fn_return_in_generics<F: Fn() -> impl Debug> (_: F) { panic!() }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 
 // Allowed
@@ -81,22 +81,22 @@ fn in_impl_Trait_in_return() -> impl IntoIterator<Item = impl IntoIterator> {
 
 // Disallowed
 struct InBraceStructField { x: impl Debug }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 struct InAdtInBraceStructField { x: Vec<impl Debug> }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 struct InTupleStructField(impl Debug);
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 enum InEnum {
     InBraceVariant { x: impl Debug },
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
     InTupleVariant(impl Debug),
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Allowed
@@ -107,7 +107,7 @@ trait InTraitDefnParameters {
 // Disallowed
 trait InTraitDefnReturn {
     fn in_return() -> impl Debug;
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Allowed and disallowed in trait impls
@@ -124,7 +124,7 @@ impl DummyTrait for () {
     // Allowed
 
     fn in_trait_impl_return() -> impl Debug { () }
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Allowed
@@ -137,10 +137,10 @@ impl DummyType {
 // Disallowed
 extern "C" {
     fn in_foreign_parameters(_: impl Debug);
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
     fn in_foreign_return() -> impl Debug;
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Allowed
@@ -156,97 +156,97 @@ type InTypeAlias<R> = impl Debug;
 //~^ ERROR `impl Trait` in type aliases is unstable
 
 type InReturnInTypeAlias<R> = fn() -> impl Debug;
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 //~| ERROR `impl Trait` in type aliases is unstable
 
 // Disallowed in impl headers
 impl PartialEq<impl Debug> for () {
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Disallowed in impl headers
 impl PartialEq<()> for impl Debug {
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Disallowed in inherent impls
 impl impl Debug {
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Disallowed in inherent impls
 struct InInherentImplAdt<T> { t: T }
 impl InInherentImplAdt<impl Debug> {
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 
 // Disallowed in where clauses
 fn in_fn_where_clause()
     where impl Debug: Debug
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 {
 }
 
 // Disallowed in where clauses
 fn in_adt_in_fn_where_clause()
     where Vec<impl Debug>: Debug
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 {
 }
 
 // Disallowed
 fn in_trait_parameter_in_fn_where_clause<T>()
     where T: PartialEq<impl Debug>
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 {
 }
 
 // Disallowed
 fn in_Fn_parameter_in_fn_where_clause<T>()
     where T: Fn(impl Debug)
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 {
 }
 
 // Disallowed
 fn in_Fn_return_in_fn_where_clause<T>()
     where T: Fn() -> impl Debug
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 {
 }
 
 // Disallowed
 struct InStructGenericParamDefault<T = impl Debug>(T);
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 enum InEnumGenericParamDefault<T = impl Debug> { Variant(T) }
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 trait InTraitGenericParamDefault<T = impl Debug> {}
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 type InTypeAliasGenericParamDefault<T = impl Debug> = T;
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 // Disallowed
 impl <T = impl Debug> T {}
 //~^ ERROR defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
 //~| WARNING this was previously accepted by the compiler but is being phased out
-//~| ERROR `impl Trait` only allowed in function and inherent method return types
+//~| ERROR `impl Trait` only allowed in function and inherent method argument and return types
 //~| ERROR no nominal type found
 
 // Disallowed
 fn in_method_generic_param_default<T = impl Debug>(_: T) {}
 //~^ ERROR defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
 //~| WARNING this was previously accepted by the compiler but is being phased out
-//~| ERROR `impl Trait` only allowed in function and inherent method return types
+//~| ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 fn main() {
     let _in_local_variable: impl Fn() = || {};
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
     let _in_return_in_local_variable = || -> impl Fn() { || {} };
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
diff --git a/tests/ui/impl-trait/where-allowed.stderr b/tests/ui/impl-trait/where-allowed.stderr
index 3e293437975..bd7c9a94793 100644
--- a/tests/ui/impl-trait/where-allowed.stderr
+++ b/tests/ui/impl-trait/where-allowed.stderr
@@ -43,109 +43,109 @@ LL | type InReturnInTypeAlias<R> = fn() -> impl Debug;
    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
    = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `fn` pointer params
   --> $DIR/where-allowed.rs:18:40
    |
 LL | fn in_fn_parameter_in_parameters(_: fn(impl Debug)) { panic!() }
    |                                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `fn` pointer return types
   --> $DIR/where-allowed.rs:22:42
    |
 LL | fn in_fn_return_in_parameters(_: fn() -> impl Debug) { panic!() }
    |                                          ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `fn` pointer params
   --> $DIR/where-allowed.rs:26:38
    |
 LL | fn in_fn_parameter_in_return() -> fn(impl Debug) { panic!() }
    |                                      ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `fn` pointer return types
   --> $DIR/where-allowed.rs:30:40
    |
 LL | fn in_fn_return_in_return() -> fn() -> impl Debug { panic!() }
    |                                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait params
   --> $DIR/where-allowed.rs:34:49
    |
 LL | fn in_dyn_Fn_parameter_in_parameters(_: &dyn Fn(impl Debug)) { panic!() }
    |                                                 ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return types
   --> $DIR/where-allowed.rs:38:51
    |
 LL | fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() }
    |                                                   ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait params
   --> $DIR/where-allowed.rs:42:55
    |
 LL | fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() }
    |                                                       ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait params
   --> $DIR/where-allowed.rs:49:51
    |
 LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() }
    |                                                   ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return types
   --> $DIR/where-allowed.rs:54:53
    |
 LL | fn in_impl_Fn_return_in_parameters(_: &impl Fn() -> impl Debug) { panic!() }
    |                                                     ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait params
   --> $DIR/where-allowed.rs:58:57
    |
 LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() }
    |                                                         ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait params
   --> $DIR/where-allowed.rs:66:38
    |
 LL | fn in_Fn_parameter_in_generics<F: Fn(impl Debug)> (_: F) { panic!() }
    |                                      ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return types
   --> $DIR/where-allowed.rs:70:40
    |
 LL | fn in_Fn_return_in_generics<F: Fn() -> impl Debug> (_: F) { panic!() }
    |                                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in field types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in field types
   --> $DIR/where-allowed.rs:83:32
    |
 LL | struct InBraceStructField { x: impl Debug }
    |                                ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in field types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in field types
   --> $DIR/where-allowed.rs:87:41
    |
 LL | struct InAdtInBraceStructField { x: Vec<impl Debug> }
    |                                         ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in field types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in field types
   --> $DIR/where-allowed.rs:91:27
    |
 LL | struct InTupleStructField(impl Debug);
    |                           ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in field types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in field types
   --> $DIR/where-allowed.rs:96:25
    |
 LL |     InBraceVariant { x: impl Debug },
    |                         ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in field types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in field types
   --> $DIR/where-allowed.rs:98:20
    |
 LL |     InTupleVariant(impl Debug),
    |                    ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait method return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in trait method return types
   --> $DIR/where-allowed.rs:109:23
    |
 LL |     fn in_return() -> impl Debug;
@@ -154,7 +154,7 @@ LL |     fn in_return() -> impl Debug;
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
    = help: add `#![feature(return_position_impl_trait_in_trait)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `impl` method return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `impl` method return types
   --> $DIR/where-allowed.rs:126:34
    |
 LL |     fn in_trait_impl_return() -> impl Debug { () }
@@ -163,121 +163,121 @@ LL |     fn in_trait_impl_return() -> impl Debug { () }
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
    = help: add `#![feature(return_position_impl_trait_in_trait)]` to the crate attributes to enable
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `extern fn` params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `extern fn` params
   --> $DIR/where-allowed.rs:139:33
    |
 LL |     fn in_foreign_parameters(_: impl Debug);
    |                                 ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `extern fn` return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `extern fn` return types
   --> $DIR/where-allowed.rs:142:31
    |
 LL |     fn in_foreign_return() -> impl Debug;
    |                               ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `fn` pointer return types
   --> $DIR/where-allowed.rs:158:39
    |
 LL | type InReturnInTypeAlias<R> = fn() -> impl Debug;
    |                                       ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in traits
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in traits
   --> $DIR/where-allowed.rs:163:16
    |
 LL | impl PartialEq<impl Debug> for () {
    |                ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in impl headers
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in impl headers
   --> $DIR/where-allowed.rs:168:24
    |
 LL | impl PartialEq<()> for impl Debug {
    |                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in impl headers
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in impl headers
   --> $DIR/where-allowed.rs:173:6
    |
 LL | impl impl Debug {
    |      ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in impl headers
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in impl headers
   --> $DIR/where-allowed.rs:179:24
    |
 LL | impl InInherentImplAdt<impl Debug> {
    |                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in bounds
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in bounds
   --> $DIR/where-allowed.rs:185:11
    |
 LL |     where impl Debug: Debug
    |           ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in bounds
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in bounds
   --> $DIR/where-allowed.rs:192:15
    |
 LL |     where Vec<impl Debug>: Debug
    |               ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in bounds
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in bounds
   --> $DIR/where-allowed.rs:199:24
    |
 LL |     where T: PartialEq<impl Debug>
    |                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait params
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait params
   --> $DIR/where-allowed.rs:206:17
    |
 LL |     where T: Fn(impl Debug)
    |                 ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `Fn` trait return types
   --> $DIR/where-allowed.rs:213:22
    |
 LL |     where T: Fn() -> impl Debug
    |                      ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/where-allowed.rs:219:40
    |
 LL | struct InStructGenericParamDefault<T = impl Debug>(T);
    |                                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/where-allowed.rs:223:36
    |
 LL | enum InEnumGenericParamDefault<T = impl Debug> { Variant(T) }
    |                                    ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/where-allowed.rs:227:38
    |
 LL | trait InTraitGenericParamDefault<T = impl Debug> {}
    |                                      ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/where-allowed.rs:231:41
    |
 LL | type InTypeAliasGenericParamDefault<T = impl Debug> = T;
    |                                         ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/where-allowed.rs:235:11
    |
 LL | impl <T = impl Debug> T {}
    |           ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic parameter defaults
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults
   --> $DIR/where-allowed.rs:242:40
    |
 LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {}
    |                                        ^^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/where-allowed.rs:248:29
    |
 LL |     let _in_local_variable: impl Fn() = || {};
    |                             ^^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in closure return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in closure return types
   --> $DIR/where-allowed.rs:250:46
    |
 LL |     let _in_return_in_local_variable = || -> impl Fn() { || {} };
diff --git a/tests/ui/imports/ambiguous-9.stderr b/tests/ui/imports/ambiguous-9.stderr
index 6c7d79174da..2731ed2ba86 100644
--- a/tests/ui/imports/ambiguous-9.stderr
+++ b/tests/ui/imports/ambiguous-9.stderr
@@ -60,6 +60,7 @@ note: `date_range` could also refer to the function imported here
 LL | use prelude::*;
    |     ^^^^^^^^^^
    = help: consider adding an explicit import of `date_range` to disambiguate
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 4 warnings emitted
 
diff --git a/tests/ui/imports/issue-55457.stderr b/tests/ui/imports/issue-55457.stderr
index 788fcc830ae..30d2373652b 100644
--- a/tests/ui/imports/issue-55457.stderr
+++ b/tests/ui/imports/issue-55457.stderr
@@ -38,6 +38,7 @@ LL | #[derive(NonExistent)]
    |          ^^^^^^^^^^^
    |
    = note: import resolution is stuck, try simplifying macro imports
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot determine resolution for the derive macro `NonExistent`
   --> $DIR/issue-55457.rs:5:10
@@ -46,6 +47,7 @@ LL | #[derive(NonExistent)]
    |          ^^^^^^^^^^^
    |
    = note: import resolution is stuck, try simplifying macro imports
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/indexing/index-help.stderr b/tests/ui/indexing/index-help.stderr
index e020d029875..2cb212a0139 100644
--- a/tests/ui/indexing/index-help.stderr
+++ b/tests/ui/indexing/index-help.stderr
@@ -5,7 +5,8 @@ LL |     x[0i32];
    |       ^^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[{integer}]>` is not implemented for `i32`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[{integer}]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `i32`
    = note: required for `Vec<{integer}>` to implement `Index<i32>`
 
 error: aborting due to previous error
diff --git a/tests/ui/indexing/indexing-requires-a-uint.stderr b/tests/ui/indexing/indexing-requires-a-uint.stderr
index 7a741cfc7de..6ea6bb600e9 100644
--- a/tests/ui/indexing/indexing-requires-a-uint.stderr
+++ b/tests/ui/indexing/indexing-requires-a-uint.stderr
@@ -5,7 +5,8 @@ LL |     [0][0u8];
    |         ^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[{integer}]>` is not implemented for `u8`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[{integer}]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `u8`
    = note: required for `[{integer}]` to implement `Index<u8>`
 
 error[E0308]: mismatched types
diff --git a/tests/ui/inference/cannot-infer-closure-circular.stderr b/tests/ui/inference/cannot-infer-closure-circular.stderr
index b706cd2bc36..98639f307fb 100644
--- a/tests/ui/inference/cannot-infer-closure-circular.stderr
+++ b/tests/ui/inference/cannot-infer-closure-circular.stderr
@@ -3,6 +3,9 @@ error[E0282]: type annotations needed for `Result<(), E>`
    |
 LL |     let x = |r| {
    |              ^
+LL |         let v = r?;
+LL |         Ok(v)
+   |         ----- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type, where the type for type parameter `E` is specified
    |
diff --git a/tests/ui/inference/issue-104649.stderr b/tests/ui/inference/issue-104649.stderr
index 4962b21f9fd..2819329275d 100644
--- a/tests/ui/inference/issue-104649.stderr
+++ b/tests/ui/inference/issue-104649.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `A<std::result::Result<std::result::Re
   --> $DIR/issue-104649.rs:24:9
    |
 LL |     let a = A(Result::Ok(Result::Ok(())));
-   |         ^
+   |         ^                -------------- type must be known at this point
    |
 help: consider giving `a` an explicit type, where the type for type parameter `E` is specified
    |
diff --git a/tests/ui/inference/issue-71584.rs b/tests/ui/inference/issue-71584.rs
index 7bf3ed60ec1..c96c32d5c0a 100644
--- a/tests/ui/inference/issue-71584.rs
+++ b/tests/ui/inference/issue-71584.rs
@@ -1,3 +1,4 @@
+// ignore-windows different list of satisfying impls
 fn main() {
     let n: u32 = 1;
     let mut d: u64 = 2;
diff --git a/tests/ui/inference/issue-71584.stderr b/tests/ui/inference/issue-71584.stderr
index 6ddb7657301..22c0f113d6a 100644
--- a/tests/ui/inference/issue-71584.stderr
+++ b/tests/ui/inference/issue-71584.stderr
@@ -1,5 +1,5 @@
 error[E0284]: type annotations needed
-  --> $DIR/issue-71584.rs:4:15
+  --> $DIR/issue-71584.rs:5:15
    |
 LL |     d = d % n.into();
    |           -   ^^^^
diff --git a/tests/ui/inference/issue-72690.stderr b/tests/ui/inference/issue-72690.stderr
index 225558805e0..6c93241ea07 100644
--- a/tests/ui/inference/issue-72690.stderr
+++ b/tests/ui/inference/issue-72690.stderr
@@ -24,16 +24,15 @@ help: try using a fully qualified path to specify the expected types
 LL |     String::from(<str as AsRef<T>>::as_ref("x"));
    |                  ++++++++++++++++++++++++++   ~
 
-error[E0282]: type annotations needed
-  --> $DIR/issue-72690.rs:12:6
+error[E0283]: type annotations needed
+  --> $DIR/issue-72690.rs:12:9
    |
 LL |     |x| String::from("x".as_ref());
-   |      ^
-   |
-help: consider giving this closure parameter an explicit type
+   |         ^^^^^^ cannot infer type for reference `&_`
    |
-LL |     |x: /* Type */| String::from("x".as_ref());
-   |       ++++++++++++
+   = note: multiple `impl`s satisfying `String: From<&_>` found in the `alloc` crate:
+           - impl From<&String> for String;
+           - impl From<&str> for String;
 
 error[E0283]: type annotations needed
   --> $DIR/issue-72690.rs:12:26
@@ -225,5 +224,4 @@ LL |     String::from(<str as AsRef<T>>::as_ref("x"));
 
 error: aborting due to 17 previous errors
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/inference/multiple-impl-apply.rs b/tests/ui/inference/multiple-impl-apply.rs
new file mode 100644
index 00000000000..314fe0f2ae5
--- /dev/null
+++ b/tests/ui/inference/multiple-impl-apply.rs
@@ -0,0 +1,48 @@
+struct Foo {
+    inner: u32,
+}
+
+struct Bar {
+    inner: u32,
+}
+
+#[derive(Clone, Copy)]
+struct Baz {
+    inner: u32,
+}
+
+impl From<Baz> for Bar {
+    fn from(other: Baz) -> Self {
+        Self {
+            inner: other.inner,
+        }
+    }
+}
+
+impl From<Baz> for Foo {
+    fn from(other: Baz) -> Self {
+        Self {
+            inner: other.inner,
+        }
+    }
+}
+
+fn main() {
+    let x: Baz = Baz { inner: 42 };
+
+    // DOESN'T Compile: Multiple options!
+    let y = x.into(); //~ ERROR E0283
+
+    let y_1: Foo = x.into();
+    let y_2: Bar = x.into();
+
+    let z_1 = Foo::from(y_1);
+    let z_2 = Bar::from(y_2);
+
+    // No type annotations needed, the compiler KNOWS the type must be `Foo`!
+    let m = magic_foo(x);
+}
+
+fn magic_foo(arg: Baz) -> Foo {
+    arg.into()
+}
diff --git a/tests/ui/inference/multiple-impl-apply.stderr b/tests/ui/inference/multiple-impl-apply.stderr
new file mode 100644
index 00000000000..ec49e15201a
--- /dev/null
+++ b/tests/ui/inference/multiple-impl-apply.stderr
@@ -0,0 +1,23 @@
+error[E0283]: type annotations needed
+  --> $DIR/multiple-impl-apply.rs:34:9
+   |
+LL |     let y = x.into();
+   |         ^     ---- type must be known at this point
+   |
+note: multiple `impl`s satisfying `_: From<Baz>` found
+  --> $DIR/multiple-impl-apply.rs:14:1
+   |
+LL | impl From<Baz> for Bar {
+   | ^^^^^^^^^^^^^^^^^^^^^^
+...
+LL | impl From<Baz> for Foo {
+   | ^^^^^^^^^^^^^^^^^^^^^^
+   = note: required for `Baz` to implement `Into<_>`
+help: consider giving `y` an explicit type
+   |
+LL |     let y: /* Type */ = x.into();
+   |          ++++++++++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/inference/need_type_info/concrete-impl.rs b/tests/ui/inference/need_type_info/concrete-impl.rs
index fc79e6201bd..8960f870c39 100644
--- a/tests/ui/inference/need_type_info/concrete-impl.rs
+++ b/tests/ui/inference/need_type_info/concrete-impl.rs
@@ -14,6 +14,4 @@ fn main() {
     <Struct as Ambiguous<_>>::method();
     //~^ ERROR type annotations needed
     //~| NOTE cannot infer type of the type parameter `A`
-    //~| ERROR type annotations needed
-    //~| NOTE infer type of the type parameter `A`
 }
diff --git a/tests/ui/inference/need_type_info/concrete-impl.stderr b/tests/ui/inference/need_type_info/concrete-impl.stderr
index 74c3f6cd5cf..6b86753caf9 100644
--- a/tests/ui/inference/need_type_info/concrete-impl.stderr
+++ b/tests/ui/inference/need_type_info/concrete-impl.stderr
@@ -1,9 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/concrete-impl.rs:14:5
-   |
-LL |     <Struct as Ambiguous<_>>::method();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type of the type parameter `A` declared on the trait `Ambiguous`
-
 error[E0283]: type annotations needed
   --> $DIR/concrete-impl.rs:14:5
    |
@@ -19,7 +13,6 @@ LL |
 LL | impl Ambiguous<Two> for Struct {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/inference/need_type_info/issue-113264-incorrect-impl-trait-in-path-suggestion.stderr b/tests/ui/inference/need_type_info/issue-113264-incorrect-impl-trait-in-path-suggestion.stderr
index 0ec219415ab..9ca94cd58df 100644
--- a/tests/ui/inference/need_type_info/issue-113264-incorrect-impl-trait-in-path-suggestion.stderr
+++ b/tests/ui/inference/need_type_info/issue-113264-incorrect-impl-trait-in-path-suggestion.stderr
@@ -1,9 +1,17 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/issue-113264-incorrect-impl-trait-in-path-suggestion.rs:10:16
    |
 LL |     (S {}).owo(None)
-   |                ^^^^ cannot infer type of the type parameter `T` declared on the enum `Option`
+   |            --- ^^^^ cannot infer type of the type parameter `T` declared on the enum `Option`
+   |            |
+   |            required by a bound introduced by this call
    |
+   = note: cannot satisfy `_: T`
+note: required by a bound in `S::owo`
+  --> $DIR/issue-113264-incorrect-impl-trait-in-path-suggestion.rs:6:35
+   |
+LL |     fn owo(&self, _: Option<&impl T>) {}
+   |                                   ^ required by this bound in `S::owo`
 help: consider specifying the generic argument
    |
 LL |     (S {}).owo(None::<&_>)
@@ -11,4 +19,4 @@ LL |     (S {}).owo(None::<&_>)
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/inference/question-mark-type-infer.stderr b/tests/ui/inference/question-mark-type-infer.stderr
index 7a1e850d157..52baa213302 100644
--- a/tests/ui/inference/question-mark-type-infer.stderr
+++ b/tests/ui/inference/question-mark-type-infer.stderr
@@ -1,9 +1,12 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/question-mark-type-infer.rs:10:21
    |
 LL |     l.iter().map(f).collect()?
    |                     ^^^^^^^ cannot infer type of the type parameter `B` declared on the method `collect`
    |
+   = note: cannot satisfy `_: FromIterator<Result<i32, ()>>`
+note: required by a bound in `collect`
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
 help: consider specifying the generic argument
    |
 LL |     l.iter().map(f).collect::<Vec<_>>()?
@@ -11,4 +14,4 @@ LL |     l.iter().map(f).collect::<Vec<_>>()?
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/integral-indexing.stderr b/tests/ui/integral-indexing.stderr
index bbbb2a86a22..97e658617cf 100644
--- a/tests/ui/integral-indexing.stderr
+++ b/tests/ui/integral-indexing.stderr
@@ -5,7 +5,8 @@ LL |     v[3u8];
    |       ^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[isize]>` is not implemented for `u8`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[isize]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `u8`
    = note: required for `Vec<isize>` to implement `Index<u8>`
 
 error[E0277]: the type `[isize]` cannot be indexed by `i8`
@@ -15,7 +16,8 @@ LL |     v[3i8];
    |       ^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[isize]>` is not implemented for `i8`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[isize]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `i8`
    = note: required for `Vec<isize>` to implement `Index<i8>`
 
 error[E0277]: the type `[isize]` cannot be indexed by `u32`
@@ -25,7 +27,8 @@ LL |     v[3u32];
    |       ^^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[isize]>` is not implemented for `u32`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[isize]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `u32`
    = note: required for `Vec<isize>` to implement `Index<u32>`
 
 error[E0277]: the type `[isize]` cannot be indexed by `i32`
@@ -35,7 +38,8 @@ LL |     v[3i32];
    |       ^^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[isize]>` is not implemented for `i32`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[isize]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `i32`
    = note: required for `Vec<isize>` to implement `Index<i32>`
 
 error[E0277]: the type `[u8]` cannot be indexed by `u8`
@@ -45,7 +49,8 @@ LL |     s.as_bytes()[3u8];
    |                  ^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[u8]>` is not implemented for `u8`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[u8]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `u8`
    = note: required for `[u8]` to implement `Index<u8>`
 
 error[E0277]: the type `[u8]` cannot be indexed by `i8`
@@ -55,7 +60,8 @@ LL |     s.as_bytes()[3i8];
    |                  ^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[u8]>` is not implemented for `i8`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[u8]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `i8`
    = note: required for `[u8]` to implement `Index<i8>`
 
 error[E0277]: the type `[u8]` cannot be indexed by `u32`
@@ -65,7 +71,8 @@ LL |     s.as_bytes()[3u32];
    |                  ^^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[u8]>` is not implemented for `u32`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[u8]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `u32`
    = note: required for `[u8]` to implement `Index<u32>`
 
 error[E0277]: the type `[u8]` cannot be indexed by `i32`
@@ -75,7 +82,8 @@ LL |     s.as_bytes()[3i32];
    |                  ^^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[u8]>` is not implemented for `i32`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[u8]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `i32`
    = note: required for `[u8]` to implement `Index<i32>`
 
 error: aborting due to 8 previous errors
diff --git a/tests/ui/issues/issue-12187-1.stderr b/tests/ui/issues/issue-12187-1.stderr
index 806b7f0ac05..d2a6a96082e 100644
--- a/tests/ui/issues/issue-12187-1.stderr
+++ b/tests/ui/issues/issue-12187-1.stderr
@@ -2,9 +2,9 @@ error[E0282]: type annotations needed for `&T`
   --> $DIR/issue-12187-1.rs:6:9
    |
 LL |     let &v = new();
-   |         ^^
+   |         ^^   ----- type must be known at this point
    |
-help: consider giving this pattern a type, where the placeholders `_` are specified
+help: consider giving this pattern a type, where the type for type parameter `T` is specified
    |
 LL |     let &v: &T = new();
    |           ++++
diff --git a/tests/ui/issues/issue-12187-2.stderr b/tests/ui/issues/issue-12187-2.stderr
index a1fa0a2b002..ac75ebb4256 100644
--- a/tests/ui/issues/issue-12187-2.stderr
+++ b/tests/ui/issues/issue-12187-2.stderr
@@ -2,9 +2,9 @@ error[E0282]: type annotations needed for `&T`
   --> $DIR/issue-12187-2.rs:6:9
    |
 LL |     let &v = new();
-   |         ^^
+   |         ^^   ----- type must be known at this point
    |
-help: consider giving this pattern a type, where the placeholders `_` are specified
+help: consider giving this pattern a type, where the type for type parameter `T` is specified
    |
 LL |     let &v: &T = new();
    |           ++++
diff --git a/tests/ui/issues/issue-16966.stderr b/tests/ui/issues/issue-16966.stderr
index 8c92505b5eb..c53707c5d69 100644
--- a/tests/ui/issues/issue-16966.stderr
+++ b/tests/ui/issues/issue-16966.stderr
@@ -1,9 +1,16 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/issue-16966.rs:2:12
    |
 LL |     panic!(std::default::Default::default());
-   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
+   |     -------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-
+   |     |      |
+   |     |      cannot infer type
+   |     required by a bound introduced by this call
+   |
+   = note: cannot satisfy `_: Any`
+note: required by a bound in `begin_panic`
+  --> $SRC_DIR/std/src/panicking.rs:LL:COL
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/issues/issue-17551.stderr b/tests/ui/issues/issue-17551.stderr
index 5f45a2f8443..3a8f569a3a5 100644
--- a/tests/ui/issues/issue-17551.stderr
+++ b/tests/ui/issues/issue-17551.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `B<T>`
   --> $DIR/issue-17551.rs:6:9
    |
 LL |     let foo = B(marker::PhantomData);
-   |         ^^^
+   |         ^^^     ------------------- type must be known at this point
    |
 help: consider giving `foo` an explicit type, where the type for type parameter `T` is specified
    |
diff --git a/tests/ui/issues/issue-24036.stderr b/tests/ui/issues/issue-24036.stderr
index a425816cdeb..184383b7369 100644
--- a/tests/ui/issues/issue-24036.stderr
+++ b/tests/ui/issues/issue-24036.stderr
@@ -11,12 +11,13 @@ LL |     x = |c| c + 1;
    = note: no two closures, even if identical, have the same type
    = help: consider boxing your closure and/or using it as a trait object
 
-error[E0282]: type annotations needed
+error[E0284]: type annotations needed
   --> $DIR/issue-24036.rs:9:15
    |
 LL |         1 => |c| c + 1,
-   |               ^
+   |               ^    - type must be known at this point
    |
+   = note: cannot satisfy `<_ as Add<i32>>::Output == _`
 help: consider giving this closure parameter an explicit type
    |
 LL |         1 => |c: /* Type */| c + 1,
@@ -24,5 +25,5 @@ LL |         1 => |c: /* Type */| c + 1,
 
 error: aborting due to 2 previous errors
 
-Some errors have detailed explanations: E0282, E0308.
-For more information about an error, try `rustc --explain E0282`.
+Some errors have detailed explanations: E0284, E0308.
+For more information about an error, try `rustc --explain E0284`.
diff --git a/tests/ui/issues/issue-24446.stderr b/tests/ui/issues/issue-24446.stderr
index 4afb87c4825..72d528f1619 100644
--- a/tests/ui/issues/issue-24446.stderr
+++ b/tests/ui/issues/issue-24446.stderr
@@ -1,19 +1,19 @@
-error[E0277]: the size for values of type `(dyn Fn() -> u32 + 'static)` cannot be known at compilation time
+error[E0277]: `(dyn Fn() -> u32 + 'static)` cannot be shared between threads safely
   --> $DIR/issue-24446.rs:2:17
    |
 LL |     static foo: dyn Fn() -> u32 = || -> u32 {
-   |                 ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
+   |                 ^^^^^^^^^^^^^^^ `(dyn Fn() -> u32 + 'static)` cannot be shared between threads safely
    |
-   = help: the trait `Sized` is not implemented for `(dyn Fn() -> u32 + 'static)`
+   = help: the trait `Sync` is not implemented for `(dyn Fn() -> u32 + 'static)`
+   = note: shared static variables must have a type that implements `Sync`
 
-error[E0277]: `(dyn Fn() -> u32 + 'static)` cannot be shared between threads safely
+error[E0277]: the size for values of type `(dyn Fn() -> u32 + 'static)` cannot be known at compilation time
   --> $DIR/issue-24446.rs:2:17
    |
 LL |     static foo: dyn Fn() -> u32 = || -> u32 {
-   |                 ^^^^^^^^^^^^^^^ `(dyn Fn() -> u32 + 'static)` cannot be shared between threads safely
+   |                 ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
    |
-   = help: the trait `Sync` is not implemented for `(dyn Fn() -> u32 + 'static)`
-   = note: shared static variables must have a type that implements `Sync`
+   = help: the trait `Sized` is not implemented for `(dyn Fn() -> u32 + 'static)`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/issues/issue-33571.stderr b/tests/ui/issues/issue-33571.stderr
index 2a9ba5ba71b..819a533ddbe 100644
--- a/tests/ui/issues/issue-33571.stderr
+++ b/tests/ui/issues/issue-33571.stderr
@@ -21,6 +21,7 @@ note: unsafe traits like `Sync` should be implemented explicitly
    |
 LL |          Sync,
    |          ^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/issues/issue-34334.stderr b/tests/ui/issues/issue-34334.stderr
index 9d2c315e4db..753942dd1d1 100644
--- a/tests/ui/issues/issue-34334.stderr
+++ b/tests/ui/issues/issue-34334.stderr
@@ -19,7 +19,8 @@ LL |     let sr2: Vec<(u32, _, _)> = sr.iter().map(|(faction, th_sender, th_rece
    |                                                                                       ^^^^^^^ value of type `Vec<(u32, _, _)>` cannot be built from `std::iter::Iterator<Item=()>`
    |
    = help: the trait `FromIterator<()>` is not implemented for `Vec<(u32, _, _)>`
-   = help: the trait `FromIterator<T>` is implemented for `Vec<T>`
+   = help: the trait `FromIterator<(u32, _, _)>` is implemented for `Vec<(u32, _, _)>`
+   = help: for that trait implementation, expected `(u32, _, _)`, found `()`
 note: the method call chain might not have had the expected associated types
   --> $DIR/issue-34334.rs:5:43
    |
diff --git a/tests/ui/issues/issue-40000.stderr b/tests/ui/issues/issue-40000.stderr
index c41fbb9d2ec..0737a9610e2 100644
--- a/tests/ui/issues/issue-40000.stderr
+++ b/tests/ui/issues/issue-40000.stderr
@@ -15,6 +15,7 @@ LL |     foo(bar);
    |
    = note: expected trait object `dyn for<'a> Fn(&'a i32)`
               found trait object `dyn Fn(&i32)`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/issues/issue-45801.stderr b/tests/ui/issues/issue-45801.stderr
index 8967f49df02..e651e2a68d1 100644
--- a/tests/ui/issues/issue-45801.stderr
+++ b/tests/ui/issues/issue-45801.stderr
@@ -5,6 +5,7 @@ LL |     req.get_ref::<Params>();
    |         ^^^^^^^ the trait `Plugin<i32>` is not implemented for `Params`
    |
    = help: the trait `Plugin<Foo>` is implemented for `Params`
+   = help: for that trait implementation, expected `Foo`, found `i32`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/issues/issue-46101.stderr b/tests/ui/issues/issue-46101.stderr
index 40295b8a115..a0cdd5d5f05 100644
--- a/tests/ui/issues/issue-46101.stderr
+++ b/tests/ui/issues/issue-46101.stderr
@@ -9,6 +9,8 @@ error[E0433]: failed to resolve: partially resolved path in a derive macro
    |
 LL | #[derive(Foo::Anything)]
    |          ^^^^^^^^^^^^^ partially resolved path in a derive macro
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/issues/issue-47715.rs b/tests/ui/issues/issue-47715.rs
index b8088c18dad..0a770593bc9 100644
--- a/tests/ui/issues/issue-47715.rs
+++ b/tests/ui/issues/issue-47715.rs
@@ -7,22 +7,22 @@ trait Iterable {
 }
 
 struct Container<T: Iterable<Item = impl Foo>> {
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
     field: T
 }
 
 enum Enum<T: Iterable<Item = impl Foo>> {
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
     A(T),
 }
 
 union Union<T: Iterable<Item = impl Foo> + Copy> {
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
     x: T,
 }
 
 type Type<T: Iterable<Item = impl Foo>> = T;
-//~^ ERROR `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 
 fn main() {
 }
diff --git a/tests/ui/issues/issue-47715.stderr b/tests/ui/issues/issue-47715.stderr
index dadea34b688..2ded98781c6 100644
--- a/tests/ui/issues/issue-47715.stderr
+++ b/tests/ui/issues/issue-47715.stderr
@@ -1,22 +1,22 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generics
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generics
   --> $DIR/issue-47715.rs:9:37
    |
 LL | struct Container<T: Iterable<Item = impl Foo>> {
    |                                     ^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generics
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generics
   --> $DIR/issue-47715.rs:14:30
    |
 LL | enum Enum<T: Iterable<Item = impl Foo>> {
    |                              ^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generics
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generics
   --> $DIR/issue-47715.rs:19:32
    |
 LL | union Union<T: Iterable<Item = impl Foo> + Copy> {
    |                                ^^^^^^^^
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generics
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generics
   --> $DIR/issue-47715.rs:24:30
    |
 LL | type Type<T: Iterable<Item = impl Foo>> = T;
diff --git a/tests/ui/issues/issue-53251.stderr b/tests/ui/issues/issue-53251.stderr
index d5f14e8deb9..05ea6311589 100644
--- a/tests/ui/issues/issue-53251.stderr
+++ b/tests/ui/issues/issue-53251.stderr
@@ -32,6 +32,7 @@ note: associated function defined here, with 0 generic parameters
    |
 LL |     fn f() {}
    |        ^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this error originates in the macro `impl_add` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 2 previous errors
diff --git a/tests/ui/issues/issue-66667-function-cmp-cycle.stderr b/tests/ui/issues/issue-66667-function-cmp-cycle.stderr
index d9a960ce197..cec8117702a 100644
--- a/tests/ui/issues/issue-66667-function-cmp-cycle.stderr
+++ b/tests/ui/issues/issue-66667-function-cmp-cycle.stderr
@@ -19,7 +19,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-66667-function-cmp-cycle.rs:2:5
    |
 LL | fn first() {
-   |            - help: try adding a return type: `-> bool`
+   |           - help: try adding a return type: `-> bool`
 LL |     second == 1
    |     ^^^^^^^^^^^ expected `()`, found `bool`
 
@@ -44,7 +44,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-66667-function-cmp-cycle.rs:8:5
    |
 LL | fn second() {
-   |             - help: try adding a return type: `-> bool`
+   |            - help: try adding a return type: `-> bool`
 LL |     first == 1
    |     ^^^^^^^^^^ expected `()`, found `bool`
 
@@ -69,7 +69,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-66667-function-cmp-cycle.rs:14:5
    |
 LL | fn bar() {
-   |          - help: try adding a return type: `-> bool`
+   |         - help: try adding a return type: `-> bool`
 LL |     bar == 1
    |     ^^^^^^^^ expected `()`, found `bool`
 
diff --git a/tests/ui/issues/issue-66923-show-error-for-correct-call.stderr b/tests/ui/issues/issue-66923-show-error-for-correct-call.stderr
index 22b1da64cb3..128288e28f5 100644
--- a/tests/ui/issues/issue-66923-show-error-for-correct-call.stderr
+++ b/tests/ui/issues/issue-66923-show-error-for-correct-call.stderr
@@ -5,7 +5,8 @@ LL |     let x2: Vec<f64> = x1.into_iter().collect();
    |                                       ^^^^^^^ value of type `Vec<f64>` cannot be built from `std::iter::Iterator<Item=&f64>`
    |
    = help: the trait `FromIterator<&f64>` is not implemented for `Vec<f64>`
-   = help: the trait `FromIterator<T>` is implemented for `Vec<T>`
+   = help: the trait `FromIterator<f64>` is implemented for `Vec<f64>`
+   = help: for that trait implementation, expected `f64`, found `&f64`
 note: the method call chain might not have had the expected associated types
   --> $DIR/issue-66923-show-error-for-correct-call.rs:8:27
    |
@@ -25,7 +26,8 @@ LL |     let x3 = x1.into_iter().collect::<Vec<f64>>();
    |                             required by a bound introduced by this call
    |
    = help: the trait `FromIterator<&f64>` is not implemented for `Vec<f64>`
-   = help: the trait `FromIterator<T>` is implemented for `Vec<T>`
+   = help: the trait `FromIterator<f64>` is implemented for `Vec<f64>`
+   = help: for that trait implementation, expected `f64`, found `&f64`
 note: the method call chain might not have had the expected associated types
   --> $DIR/issue-66923-show-error-for-correct-call.rs:12:17
    |
diff --git a/tests/ui/iterators/collect-into-slice.stderr b/tests/ui/iterators/collect-into-slice.stderr
index 07dc561f06a..45685ef0ce9 100644
--- a/tests/ui/iterators/collect-into-slice.stderr
+++ b/tests/ui/iterators/collect-into-slice.stderr
@@ -1,3 +1,13 @@
+error[E0277]: a slice of type `[i32]` cannot be built since `[i32]` has no definite size
+  --> $DIR/collect-into-slice.rs:6:38
+   |
+LL |     let some_generated_vec = (0..10).collect();
+   |                                      ^^^^^^^ try explicitly collecting into a `Vec<{integer}>`
+   |
+   = help: the trait `FromIterator<{integer}>` is not implemented for `[i32]`
+note: required by a bound in `collect`
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+
 error[E0277]: the size for values of type `[i32]` cannot be known at compilation time
   --> $DIR/collect-into-slice.rs:6:9
    |
@@ -18,16 +28,6 @@ LL |     let some_generated_vec = (0..10).collect();
 note: required by a bound in `collect`
   --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
 
-error[E0277]: a slice of type `[i32]` cannot be built since `[i32]` has no definite size
-  --> $DIR/collect-into-slice.rs:6:38
-   |
-LL |     let some_generated_vec = (0..10).collect();
-   |                                      ^^^^^^^ try explicitly collecting into a `Vec<{integer}>`
-   |
-   = help: the trait `FromIterator<{integer}>` is not implemented for `[i32]`
-note: required by a bound in `collect`
-  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
-
 error[E0277]: a slice of type `&[i32]` cannot be built since we need to store the elements somewhere
   --> $DIR/collect-into-slice.rs:18:38
    |
diff --git a/tests/ui/iterators/invalid-iterator-chain.stderr b/tests/ui/iterators/invalid-iterator-chain.stderr
index b355da5cb76..2601c9c0d69 100644
--- a/tests/ui/iterators/invalid-iterator-chain.stderr
+++ b/tests/ui/iterators/invalid-iterator-chain.stderr
@@ -5,7 +5,8 @@ LL |     i.collect()
    |       ^^^^^^^ value of type `Vec<X>` cannot be built from `std::iter::Iterator<Item=&X>`
    |
    = help: the trait `FromIterator<&X>` is not implemented for `Vec<X>`
-   = help: the trait `FromIterator<T>` is implemented for `Vec<T>`
+   = help: the trait `FromIterator<X>` is implemented for `Vec<X>`
+   = help: for that trait implementation, expected `X`, found `&X`
 note: the method call chain might not have had the expected associated types
   --> $DIR/invalid-iterator-chain.rs:4:26
    |
@@ -159,7 +160,8 @@ LL |     let g: Vec<i32> = f.collect();
    |                         ^^^^^^^ value of type `Vec<i32>` cannot be built from `std::iter::Iterator<Item=()>`
    |
    = help: the trait `FromIterator<()>` is not implemented for `Vec<i32>`
-   = help: the trait `FromIterator<T>` is implemented for `Vec<T>`
+   = help: the trait `FromIterator<i32>` is implemented for `Vec<i32>`
+   = help: for that trait implementation, expected `i32`, found `()`
 note: the method call chain might not have had the expected associated types
   --> $DIR/invalid-iterator-chain.rs:44:15
    |
diff --git a/tests/ui/lang-items/start_lang_item_args.missing_ret.stderr b/tests/ui/lang-items/start_lang_item_args.missing_ret.stderr
index 2bb29f911a1..14bfcc3d04d 100644
--- a/tests/ui/lang-items/start_lang_item_args.missing_ret.stderr
+++ b/tests/ui/lang-items/start_lang_item_args.missing_ret.stderr
@@ -1,8 +1,8 @@
 error[E0308]: lang item `start` function has wrong type
-  --> $DIR/start_lang_item_args.rs:29:84
+  --> $DIR/start_lang_item_args.rs:29:83
    |
 LL | fn start<T>(_main: fn() -> T, _argc: isize, _argv: *const *const u8, _sigpipe: u8) {}
-   |                                                                                    ^ expected `isize`, found `()`
+   |                                                                                   ^ expected `isize`, found `()`
    |
    = note: expected signature `fn(fn() -> _, _, _, _) -> isize`
               found signature `fn(fn() -> _, _, _, _)`
diff --git a/tests/ui/lifetimes/issue-105675.stderr b/tests/ui/lifetimes/issue-105675.stderr
index 66415f72bcb..54ecd35ed6a 100644
--- a/tests/ui/lifetimes/issue-105675.stderr
+++ b/tests/ui/lifetimes/issue-105675.stderr
@@ -81,6 +81,7 @@ note: the lifetime requirement is introduced here
    |
 LL | fn thing(x: impl FnOnce(&u32, &u32, u32)) {}
    |                  ^^^^^^^^^^^^^^^^^^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: consider specifying the type of the closure parameters
    |
 LL |     let f = |x: &_, y: &_, z: u32| ();
diff --git a/tests/ui/limits/issue-55878.stderr b/tests/ui/limits/issue-55878.stderr
index 93716c0b347..6b463930b00 100644
--- a/tests/ui/limits/issue-55878.stderr
+++ b/tests/ui/limits/issue-55878.stderr
@@ -25,6 +25,7 @@ note: erroneous constant encountered
 LL |     println!("Size: {}", std::mem::size_of::<[u8; u64::MAX as usize]>());
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
    = note: this note originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
diff --git a/tests/ui/lint/cli-unknown-force-warn.stderr b/tests/ui/lint/cli-unknown-force-warn.stderr
index 2ee718a8c8e..5084b4a4001 100644
--- a/tests/ui/lint/cli-unknown-force-warn.stderr
+++ b/tests/ui/lint/cli-unknown-force-warn.stderr
@@ -6,10 +6,12 @@ warning[E0602]: unknown lint: `foo_qux`
 warning[E0602]: unknown lint: `foo_qux`
    |
    = note: requested on the command line with `--force-warn foo_qux`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning[E0602]: unknown lint: `foo_qux`
    |
    = note: requested on the command line with `--force-warn foo_qux`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/lint/command-line-register-unknown-lint-tool.stderr b/tests/ui/lint/command-line-register-unknown-lint-tool.stderr
index c9a2aff2137..65aa1962830 100644
--- a/tests/ui/lint/command-line-register-unknown-lint-tool.stderr
+++ b/tests/ui/lint/command-line-register-unknown-lint-tool.stderr
@@ -5,6 +5,7 @@ error[E0602]: unknown lint tool: `unknown_tool`
 error[E0602]: unknown lint tool: `unknown_tool`
    |
    = note: requested on the command line with `-A unknown_tool::foo`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/lint/crate_level_only_lint.stderr b/tests/ui/lint/crate_level_only_lint.stderr
index 8fb06df2a48..fbb1ec381c8 100644
--- a/tests/ui/lint/crate_level_only_lint.stderr
+++ b/tests/ui/lint/crate_level_only_lint.stderr
@@ -27,36 +27,48 @@ error: allow(uncommon_codepoints) is ignored unless specified at crate level
    |
 LL | #![allow(uncommon_codepoints)]
    |          ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(uncommon_codepoints) is ignored unless specified at crate level
   --> $DIR/crate_level_only_lint.rs:9:9
    |
 LL | #[allow(uncommon_codepoints)]
    |         ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(uncommon_codepoints) is ignored unless specified at crate level
   --> $DIR/crate_level_only_lint.rs:17:9
    |
 LL | #[allow(uncommon_codepoints)]
    |         ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(uncommon_codepoints) is ignored unless specified at crate level
   --> $DIR/crate_level_only_lint.rs:4:10
    |
 LL | #![allow(uncommon_codepoints)]
    |          ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(uncommon_codepoints) is ignored unless specified at crate level
   --> $DIR/crate_level_only_lint.rs:9:9
    |
 LL | #[allow(uncommon_codepoints)]
    |         ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(uncommon_codepoints) is ignored unless specified at crate level
   --> $DIR/crate_level_only_lint.rs:17:9
    |
 LL | #[allow(uncommon_codepoints)]
    |         ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 9 previous errors
 
diff --git a/tests/ui/lint/forbid-group-group-2.stderr b/tests/ui/lint/forbid-group-group-2.stderr
index b2e2bcea1b4..4a2c8fbd68a 100644
--- a/tests/ui/lint/forbid-group-group-2.stderr
+++ b/tests/ui/lint/forbid-group-group-2.stderr
@@ -26,6 +26,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(nonstandard_style) incompatible with previous forbid
   --> $DIR/forbid-group-group-2.rs:7:9
@@ -38,6 +39,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(nonstandard_style) incompatible with previous forbid
   --> $DIR/forbid-group-group-2.rs:7:9
@@ -50,6 +52,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(nonstandard_style) incompatible with previous forbid
   --> $DIR/forbid-group-group-2.rs:7:9
@@ -62,6 +65,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(nonstandard_style) incompatible with previous forbid
   --> $DIR/forbid-group-group-2.rs:7:9
@@ -74,6 +78,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(nonstandard_style) incompatible with previous forbid
   --> $DIR/forbid-group-group-2.rs:7:9
@@ -86,6 +91,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(nonstandard_style) incompatible with previous forbid
   --> $DIR/forbid-group-group-2.rs:7:9
@@ -98,6 +104,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: allow(nonstandard_style) incompatible with previous forbid
   --> $DIR/forbid-group-group-2.rs:7:9
@@ -110,6 +117,7 @@ LL | #[allow(nonstandard_style)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 9 previous errors
 
diff --git a/tests/ui/lint/forbid-group-member.stderr b/tests/ui/lint/forbid-group-member.stderr
index 47336d4d890..ddaaafa12ec 100644
--- a/tests/ui/lint/forbid-group-member.stderr
+++ b/tests/ui/lint/forbid-group-member.stderr
@@ -22,6 +22,7 @@ LL | #[allow(unused_variables)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: allow(unused_variables) incompatible with previous forbid
   --> $DIR/forbid-group-member.rs:8:9
@@ -34,6 +35,7 @@ LL | #[allow(unused_variables)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/lint/forbid-member-group.stderr b/tests/ui/lint/forbid-member-group.stderr
index e6530177833..612dccd8d6c 100644
--- a/tests/ui/lint/forbid-member-group.stderr
+++ b/tests/ui/lint/forbid-member-group.stderr
@@ -15,6 +15,8 @@ LL | #![forbid(unused_variables)]
 LL |
 LL | #[allow(unused)]
    |         ^^^^^^ overruled by previous forbid
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr b/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr
index 0f58953a54b..ecdc625015e 100644
--- a/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr
+++ b/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr
@@ -20,6 +20,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
@@ -33,6 +34,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
diff --git a/tests/ui/lint/force-warn/cap-lints-allow.stderr b/tests/ui/lint/force-warn/cap-lints-allow.stderr
index 03a32fa6f08..5f5f2ff52b6 100644
--- a/tests/ui/lint/force-warn/cap-lints-allow.stderr
+++ b/tests/ui/lint/force-warn/cap-lints-allow.stderr
@@ -20,6 +20,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
@@ -33,6 +34,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
diff --git a/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr b/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr
index b0cd3ddd26f..3a0b1201b0c 100644
--- a/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr
+++ b/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr
@@ -21,6 +21,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
@@ -34,6 +35,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
diff --git a/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr b/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr
index 8c841916c93..92555eda2a7 100644
--- a/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr
+++ b/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr
@@ -21,6 +21,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
@@ -34,6 +35,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
diff --git a/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr b/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr
index c0144205d6a..c14c7957a25 100644
--- a/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr
+++ b/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr
@@ -21,6 +21,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
@@ -34,6 +35,7 @@ LL | pub fn function(_x: Box<SomeTrait>) {}
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | pub fn function(_x: Box<dyn SomeTrait>) {}
diff --git a/tests/ui/lint/force-warn/warnings-lint-group.stderr b/tests/ui/lint/force-warn/warnings-lint-group.stderr
index 1faeed33704..3e73269a233 100644
--- a/tests/ui/lint/force-warn/warnings-lint-group.stderr
+++ b/tests/ui/lint/force-warn/warnings-lint-group.stderr
@@ -1,6 +1,8 @@
 error[E0602]: `warnings` lint group is not supported with ´--force-warn´
 
 error[E0602]: `warnings` lint group is not supported with ´--force-warn´
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/lint/issue-80988.stderr b/tests/ui/lint/issue-80988.stderr
index 73e27ffda7f..7a65881b5ed 100644
--- a/tests/ui/lint/issue-80988.stderr
+++ b/tests/ui/lint/issue-80988.stderr
@@ -22,6 +22,7 @@ LL | #[deny(warnings)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: deny(warnings) incompatible with previous forbid
   --> $DIR/issue-80988.rs:7:8
@@ -34,6 +35,7 @@ LL | #[deny(warnings)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/lint/lint-forbid-attr.stderr b/tests/ui/lint/lint-forbid-attr.stderr
index 5977b9c949d..bd476a0e362 100644
--- a/tests/ui/lint/lint-forbid-attr.stderr
+++ b/tests/ui/lint/lint-forbid-attr.stderr
@@ -15,6 +15,8 @@ LL | #![forbid(deprecated)]
 LL |
 LL | #[allow(deprecated)]
    |         ^^^^^^^^^^ overruled by previous forbid
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/lint/lint-forbid-cmdline.stderr b/tests/ui/lint/lint-forbid-cmdline.stderr
index 0a92e58c04a..ed49a2cb427 100644
--- a/tests/ui/lint/lint-forbid-cmdline.stderr
+++ b/tests/ui/lint/lint-forbid-cmdline.stderr
@@ -13,6 +13,7 @@ LL | #[allow(deprecated)]
    |         ^^^^^^^^^^ overruled by previous forbid
    |
    = note: `forbid` lint level was set on command line
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/lint/lint-malformed.stderr b/tests/ui/lint/lint-malformed.stderr
index 91b4e509b26..2c9f045de71 100644
--- a/tests/ui/lint/lint-malformed.stderr
+++ b/tests/ui/lint/lint-malformed.stderr
@@ -9,6 +9,8 @@ error[E0452]: malformed lint attribute input
    |
 LL | #![allow(bar = "baz")]
    |          ^^^^^^^^^^^ bad attribute argument
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: malformed `deny` attribute input
   --> $DIR/lint-malformed.rs:1:1
@@ -21,12 +23,16 @@ error[E0452]: malformed lint attribute input
    |
 LL | #![allow(bar = "baz")]
    |          ^^^^^^^^^^^ bad attribute argument
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0452]: malformed lint attribute input
   --> $DIR/lint-malformed.rs:2:10
    |
 LL | #![allow(bar = "baz")]
    |          ^^^^^^^^^^^ bad attribute argument
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 5 previous errors
 
diff --git a/tests/ui/lint/lint-removed-cmdline-deny.stderr b/tests/ui/lint/lint-removed-cmdline-deny.stderr
index 80c85d01e53..3321afa7fcd 100644
--- a/tests/ui/lint/lint-removed-cmdline-deny.stderr
+++ b/tests/ui/lint/lint-removed-cmdline-deny.stderr
@@ -6,10 +6,12 @@ error: lint `raw_pointer_derive` has been removed: using derive with raw pointer
 error: lint `raw_pointer_derive` has been removed: using derive with raw pointers is ok
    |
    = note: requested on the command line with `-D raw_pointer_derive`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: lint `raw_pointer_derive` has been removed: using derive with raw pointers is ok
    |
    = note: requested on the command line with `-D raw_pointer_derive`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unused variable: `unused`
   --> $DIR/lint-removed-cmdline-deny.rs:13:17
diff --git a/tests/ui/lint/lint-removed-cmdline.stderr b/tests/ui/lint/lint-removed-cmdline.stderr
index ebfae34ade9..6b76ad3b578 100644
--- a/tests/ui/lint/lint-removed-cmdline.stderr
+++ b/tests/ui/lint/lint-removed-cmdline.stderr
@@ -6,10 +6,12 @@ warning: lint `raw_pointer_derive` has been removed: using derive with raw point
 warning: lint `raw_pointer_derive` has been removed: using derive with raw pointers is ok
    |
    = note: requested on the command line with `-D raw_pointer_derive`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint `raw_pointer_derive` has been removed: using derive with raw pointers is ok
    |
    = note: requested on the command line with `-D raw_pointer_derive`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unused variable: `unused`
   --> $DIR/lint-removed-cmdline.rs:13:17
diff --git a/tests/ui/lint/lint-renamed-cmdline-deny.stderr b/tests/ui/lint/lint-renamed-cmdline-deny.stderr
index df22ef60daf..0e182a4e5de 100644
--- a/tests/ui/lint/lint-renamed-cmdline-deny.stderr
+++ b/tests/ui/lint/lint-renamed-cmdline-deny.stderr
@@ -8,11 +8,13 @@ error: lint `bare_trait_object` has been renamed to `bare_trait_objects`
    |
    = help: use the new name `bare_trait_objects`
    = note: requested on the command line with `-D bare_trait_object`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: lint `bare_trait_object` has been renamed to `bare_trait_objects`
    |
    = help: use the new name `bare_trait_objects`
    = note: requested on the command line with `-D bare_trait_object`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unused variable: `unused`
   --> $DIR/lint-renamed-cmdline-deny.rs:10:17
diff --git a/tests/ui/lint/lint-renamed-cmdline.stderr b/tests/ui/lint/lint-renamed-cmdline.stderr
index a41284003ed..675443ddedf 100644
--- a/tests/ui/lint/lint-renamed-cmdline.stderr
+++ b/tests/ui/lint/lint-renamed-cmdline.stderr
@@ -8,11 +8,13 @@ warning: lint `bare_trait_object` has been renamed to `bare_trait_objects`
    |
    = help: use the new name `bare_trait_objects`
    = note: requested on the command line with `-D bare_trait_object`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint `bare_trait_object` has been renamed to `bare_trait_objects`
    |
    = help: use the new name `bare_trait_objects`
    = note: requested on the command line with `-D bare_trait_object`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unused variable: `unused`
   --> $DIR/lint-renamed-cmdline.rs:9:17
diff --git a/tests/ui/lint/lint-stability-deprecated.stderr b/tests/ui/lint/lint-stability-deprecated.stderr
index 19a4649e168..609fc56a8ae 100644
--- a/tests/ui/lint/lint-stability-deprecated.stderr
+++ b/tests/ui/lint/lint-stability-deprecated.stderr
@@ -639,18 +639,24 @@ warning: use of deprecated associated type `lint_stability::TraitWithAssociatedT
    |
 LL |         struct S2<T: TraitWithAssociatedTypes>(T::TypeDeprecated);
    |                                                ^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: use of deprecated associated type `lint_stability::TraitWithAssociatedTypes::TypeDeprecated`: text
   --> $DIR/lint-stability-deprecated.rs:102:13
    |
 LL |             TypeDeprecated = u16,
    |             ^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: use of deprecated associated type `lint_stability::TraitWithAssociatedTypes::TypeDeprecated`: text
   --> $DIR/lint-stability-deprecated.rs:102:13
    |
 LL |             TypeDeprecated = u16,
    |             ^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 108 warnings emitted
 
diff --git a/tests/ui/lint/lint-unexported-no-mangle.stderr b/tests/ui/lint/lint-unexported-no-mangle.stderr
index 85852782222..0efec51abaf 100644
--- a/tests/ui/lint/lint-unexported-no-mangle.stderr
+++ b/tests/ui/lint/lint-unexported-no-mangle.stderr
@@ -10,18 +10,22 @@ warning: lint `private_no_mangle_statics` has been removed: no longer a warning,
 warning: lint `private_no_mangle_fns` has been removed: no longer a warning, `#[no_mangle]` functions always exported
    |
    = note: requested on the command line with `-F private_no_mangle_fns`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint `private_no_mangle_statics` has been removed: no longer a warning, `#[no_mangle]` statics always exported
    |
    = note: requested on the command line with `-F private_no_mangle_statics`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint `private_no_mangle_fns` has been removed: no longer a warning, `#[no_mangle]` functions always exported
    |
    = note: requested on the command line with `-F private_no_mangle_fns`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: lint `private_no_mangle_statics` has been removed: no longer a warning, `#[no_mangle]` statics always exported
    |
    = note: requested on the command line with `-F private_no_mangle_statics`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: const items should never be `#[no_mangle]`
   --> $DIR/lint-unexported-no-mangle.rs:9:1
diff --git a/tests/ui/lint/lint-unknown-lint-cmdline-deny.stderr b/tests/ui/lint/lint-unknown-lint-cmdline-deny.stderr
index 677b5edc894..f12ce03ddfc 100644
--- a/tests/ui/lint/lint-unknown-lint-cmdline-deny.stderr
+++ b/tests/ui/lint/lint-unknown-lint-cmdline-deny.stderr
@@ -11,20 +11,24 @@ error[E0602]: unknown lint: `dead_cod`
 error[E0602]: unknown lint: `bogus`
    |
    = note: requested on the command line with `-D bogus`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0602]: unknown lint: `dead_cod`
    |
    = help: did you mean: `dead_code`
    = note: requested on the command line with `-D dead_cod`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0602]: unknown lint: `bogus`
    |
    = note: requested on the command line with `-D bogus`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0602]: unknown lint: `dead_cod`
    |
    = help: did you mean: `dead_code`
    = note: requested on the command line with `-D dead_cod`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/lint/lint-unknown-lint-cmdline.stderr b/tests/ui/lint/lint-unknown-lint-cmdline.stderr
index 10db76ac4f1..f452fc9eb94 100644
--- a/tests/ui/lint/lint-unknown-lint-cmdline.stderr
+++ b/tests/ui/lint/lint-unknown-lint-cmdline.stderr
@@ -11,20 +11,24 @@ warning[E0602]: unknown lint: `dead_cod`
 warning[E0602]: unknown lint: `bogus`
    |
    = note: requested on the command line with `-D bogus`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning[E0602]: unknown lint: `dead_cod`
    |
    = help: did you mean: `dead_code`
    = note: requested on the command line with `-D dead_cod`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning[E0602]: unknown lint: `bogus`
    |
    = note: requested on the command line with `-D bogus`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning[E0602]: unknown lint: `dead_cod`
    |
    = help: did you mean: `dead_code`
    = note: requested on the command line with `-D dead_cod`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 6 warnings emitted
 
diff --git a/tests/ui/lint/must_not_suspend/gated.stderr b/tests/ui/lint/must_not_suspend/gated.stderr
index 64de1ebeaab..f0d2117d42b 100644
--- a/tests/ui/lint/must_not_suspend/gated.stderr
+++ b/tests/ui/lint/must_not_suspend/gated.stderr
@@ -18,6 +18,7 @@ LL | #![deny(must_not_suspend)]
    = note: the `must_not_suspend` lint is unstable
    = note: see issue #83310 <https://github.com/rust-lang/rust/issues/83310> for more information
    = help: add `#![feature(must_not_suspend)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `must_not_suspend`
   --> $DIR/gated.rs:4:1
@@ -28,6 +29,7 @@ LL | #![deny(must_not_suspend)]
    = note: the `must_not_suspend` lint is unstable
    = note: see issue #83310 <https://github.com/rust-lang/rust/issues/83310> for more information
    = help: add `#![feature(must_not_suspend)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/lint/reasons-erroneous.rs b/tests/ui/lint/reasons-erroneous.rs
index cd693ae166c..7b286eb1d18 100644
--- a/tests/ui/lint/reasons-erroneous.rs
+++ b/tests/ui/lint/reasons-erroneous.rs
@@ -1,51 +1,27 @@
+// compile-flags: -Zdeduplicate-diagnostics=yes
+
 #![feature(lint_reasons)]
 
 #![warn(absolute_paths_not_starting_with_crate, reason = 0)]
 //~^ ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| NOTE reason must be a string literal
 //~| NOTE reason must be a string literal
 #![warn(anonymous_parameters, reason = b"consider these, for we have condemned them")]
 //~^ ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| NOTE reason must be a string literal
 //~| NOTE reason must be a string literal
 #![warn(bare_trait_objects, reasons = "leaders to no sure land, guides their bearings lost")]
 //~^ ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| NOTE bad attribute argument
-//~| NOTE bad attribute argument
-//~| NOTE bad attribute argument
 //~| NOTE bad attribute argument
 #![warn(box_pointers, blerp = "or in league with robbers have reversed the signposts")]
 //~^ ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| NOTE bad attribute argument
-//~| NOTE bad attribute argument
-//~| NOTE bad attribute argument
 //~| NOTE bad attribute argument
 #![warn(elided_lifetimes_in_paths, reason("disrespectful to ancestors", "irresponsible to heirs"))]
 //~^ ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| NOTE bad attribute argument
-//~| NOTE bad attribute argument
-//~| NOTE bad attribute argument
 //~| NOTE bad attribute argument
 #![warn(ellipsis_inclusive_range_patterns, reason = "born barren", reason = "a freak growth")]
 //~^ ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| NOTE reason in lint attribute must come last
 //~| NOTE reason in lint attribute must come last
 #![warn(keyword_idents, reason = "root in rubble", macro_use_extern_crate)]
 //~^ ERROR malformed lint attribute
-//~| ERROR malformed lint attribute
-//~| NOTE reason in lint attribute must come last
 //~| NOTE reason in lint attribute must come last
 #![warn(missing_copy_implementations, reason)]
 //~^ WARN unknown lint
diff --git a/tests/ui/lint/reasons-erroneous.stderr b/tests/ui/lint/reasons-erroneous.stderr
index 5521af17c84..003da567370 100644
--- a/tests/ui/lint/reasons-erroneous.stderr
+++ b/tests/ui/lint/reasons-erroneous.stderr
@@ -1,5 +1,5 @@
 error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:3:58
+  --> $DIR/reasons-erroneous.rs:5:58
    |
 LL | #![warn(absolute_paths_not_starting_with_crate, reason = 0)]
    |                                                          ^ reason must be a string literal
@@ -11,121 +11,43 @@ LL | #![warn(anonymous_parameters, reason = b"consider these, for we have condem
    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ reason must be a string literal
 
 error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:13:29
+  --> $DIR/reasons-erroneous.rs:11:29
    |
 LL | #![warn(bare_trait_objects, reasons = "leaders to no sure land, guides their bearings lost")]
    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
 
 error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:13:29
-   |
-LL | #![warn(bare_trait_objects, reasons = "leaders to no sure land, guides their bearings lost")]
-   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:22:23
-   |
-LL | #![warn(box_pointers, blerp = "or in league with robbers have reversed the signposts")]
-   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:22:23
-   |
-LL | #![warn(box_pointers, blerp = "or in league with robbers have reversed the signposts")]
-   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:31:36
-   |
-LL | #![warn(elided_lifetimes_in_paths, reason("disrespectful to ancestors", "irresponsible to heirs"))]
-   |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:31:36
-   |
-LL | #![warn(elided_lifetimes_in_paths, reason("disrespectful to ancestors", "irresponsible to heirs"))]
-   |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:40:44
-   |
-LL | #![warn(ellipsis_inclusive_range_patterns, reason = "born barren", reason = "a freak growth")]
-   |                                            ^^^^^^^^^^^^^^^^^^^^^^ reason in lint attribute must come last
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:45:25
-   |
-LL | #![warn(keyword_idents, reason = "root in rubble", macro_use_extern_crate)]
-   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^ reason in lint attribute must come last
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:3:58
-   |
-LL | #![warn(absolute_paths_not_starting_with_crate, reason = 0)]
-   |                                                          ^ reason must be a string literal
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:8:40
-   |
-LL | #![warn(anonymous_parameters, reason = b"consider these, for we have condemned them")]
-   |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ reason must be a string literal
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:13:29
-   |
-LL | #![warn(bare_trait_objects, reasons = "leaders to no sure land, guides their bearings lost")]
-   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:13:29
-   |
-LL | #![warn(bare_trait_objects, reasons = "leaders to no sure land, guides their bearings lost")]
-   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:22:23
-   |
-LL | #![warn(box_pointers, blerp = "or in league with robbers have reversed the signposts")]
-   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:22:23
+  --> $DIR/reasons-erroneous.rs:14:23
    |
 LL | #![warn(box_pointers, blerp = "or in league with robbers have reversed the signposts")]
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
 
 error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:31:36
-   |
-LL | #![warn(elided_lifetimes_in_paths, reason("disrespectful to ancestors", "irresponsible to heirs"))]
-   |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
-
-error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:31:36
+  --> $DIR/reasons-erroneous.rs:17:36
    |
 LL | #![warn(elided_lifetimes_in_paths, reason("disrespectful to ancestors", "irresponsible to heirs"))]
    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ bad attribute argument
 
 error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:40:44
+  --> $DIR/reasons-erroneous.rs:20:44
    |
 LL | #![warn(ellipsis_inclusive_range_patterns, reason = "born barren", reason = "a freak growth")]
    |                                            ^^^^^^^^^^^^^^^^^^^^^^ reason in lint attribute must come last
 
 error[E0452]: malformed lint attribute input
-  --> $DIR/reasons-erroneous.rs:45:25
+  --> $DIR/reasons-erroneous.rs:23:25
    |
 LL | #![warn(keyword_idents, reason = "root in rubble", macro_use_extern_crate)]
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^ reason in lint attribute must come last
 
 warning: unknown lint: `reason`
-  --> $DIR/reasons-erroneous.rs:50:39
+  --> $DIR/reasons-erroneous.rs:26:39
    |
 LL | #![warn(missing_copy_implementations, reason)]
    |                                       ^^^^^^
    |
    = note: `#[warn(unknown_lints)]` on by default
 
-error: aborting due to 20 previous errors; 1 warning emitted
+error: aborting due to 7 previous errors; 1 warning emitted
 
 For more information about this error, try `rustc --explain E0452`.
diff --git a/tests/ui/lint/reference_casting.rs b/tests/ui/lint/reference_casting.rs
index fba8789e999..25e0c75f70d 100644
--- a/tests/ui/lint/reference_casting.rs
+++ b/tests/ui/lint/reference_casting.rs
@@ -64,6 +64,10 @@ unsafe fn ref_to_mut() {
     let _num = &mut *num;
     //~^ ERROR casting `&T` to `&mut T` is undefined behavior
 
+    let cell = &std::cell::UnsafeCell::new(0);
+    let _num = &mut *(cell as *const _ as *mut i32);
+    //~^ ERROR casting `&T` to `&mut T` is undefined behavior
+
     unsafe fn generic_ref_cast_mut<T>(this: &T) -> &mut T {
         &mut *((this as *const _) as *mut _)
         //~^ ERROR casting `&T` to `&mut T` is undefined behavior
@@ -106,6 +110,8 @@ unsafe fn assign_to_ref() {
         std::mem::transmute::<*const i32, *mut i32>(num),
         -1i32,
     );
+    *((&std::cell::UnsafeCell::new(0)) as *const _ as *mut i32) = 5;
+    //~^ ERROR assigning to `&T` is undefined behavior
 
     let value = num as *const i32 as *mut i32;
     *value = 1;
@@ -148,6 +154,8 @@ unsafe fn no_warn() {
     *RAW_PTR = 42; // RAW_PTR is defined outside the function body,
                    // make sure we don't ICE on it when trying to
                    // determine if we should lint on it or not.
+    let cell = &std::cell::UnsafeCell::new(0);
+    let _num = &mut *(cell.get() as *mut i32);
 
     fn safe_as_mut<T>(x: &std::cell::UnsafeCell<T>) -> &mut T {
         unsafe { &mut *std::cell::UnsafeCell::raw_get(x as *const _ as *const _) }
diff --git a/tests/ui/lint/reference_casting.stderr b/tests/ui/lint/reference_casting.stderr
index 8f89cf9805b..8d5f8da6852 100644
--- a/tests/ui/lint/reference_casting.stderr
+++ b/tests/ui/lint/reference_casting.stderr
@@ -158,7 +158,16 @@ LL |     let _num = &mut *num;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:68:9
+  --> $DIR/reference_casting.rs:68:16
+   |
+LL |     let _num = &mut *(cell as *const _ as *mut i32);
+   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
+   = note: even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get`
+
+error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
+  --> $DIR/reference_casting.rs:72:9
    |
 LL |         &mut *((this as *const _) as *mut _)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -166,7 +175,7 @@ LL |         &mut *((this as *const _) as *mut _)
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:73:18
+  --> $DIR/reference_casting.rs:77:18
    |
 LL |         unsafe { &mut *std::cell::UnsafeCell::raw_get(x as *const _ as *const _) }
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -174,7 +183,7 @@ LL |         unsafe { &mut *std::cell::UnsafeCell::raw_get(x as *const _ as *con
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:78:18
+  --> $DIR/reference_casting.rs:82:18
    |
 LL |         unsafe { &mut *std::cell::UnsafeCell::raw_get(x as *const _ as *const _) }
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -182,7 +191,7 @@ LL |         unsafe { &mut *std::cell::UnsafeCell::raw_get(x as *const _ as *con
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:88:5
+  --> $DIR/reference_casting.rs:92:5
    |
 LL |     *(a as *const _ as *mut _) = String::from("Replaced");
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -190,7 +199,7 @@ LL |     *(a as *const _ as *mut _) = String::from("Replaced");
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:90:5
+  --> $DIR/reference_casting.rs:94:5
    |
 LL |     *(a as *const _ as *mut String) += " world";
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -198,7 +207,7 @@ LL |     *(a as *const _ as *mut String) += " world";
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:92:5
+  --> $DIR/reference_casting.rs:96:5
    |
 LL |     *std::ptr::from_ref(num).cast_mut() += 1;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -206,7 +215,7 @@ LL |     *std::ptr::from_ref(num).cast_mut() += 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:94:5
+  --> $DIR/reference_casting.rs:98:5
    |
 LL |     *std::ptr::from_ref({ num }).cast_mut() += 1;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -214,7 +223,7 @@ LL |     *std::ptr::from_ref({ num }).cast_mut() += 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:96:5
+  --> $DIR/reference_casting.rs:100:5
    |
 LL |     *{ std::ptr::from_ref(num) }.cast_mut() += 1;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -222,7 +231,7 @@ LL |     *{ std::ptr::from_ref(num) }.cast_mut() += 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:98:5
+  --> $DIR/reference_casting.rs:102:5
    |
 LL |     *(std::ptr::from_ref({ num }) as *mut i32) += 1;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -230,7 +239,7 @@ LL |     *(std::ptr::from_ref({ num }) as *mut i32) += 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:100:5
+  --> $DIR/reference_casting.rs:104:5
    |
 LL |     *std::mem::transmute::<_, *mut i32>(num) += 1;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -238,7 +247,7 @@ LL |     *std::mem::transmute::<_, *mut i32>(num) += 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:102:5
+  --> $DIR/reference_casting.rs:106:5
    |
 LL |     *(std::mem::transmute::<_, *mut i32>(num) as *mut i32) += 1;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -246,7 +255,7 @@ LL |     *(std::mem::transmute::<_, *mut i32>(num) as *mut i32) += 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:104:5
+  --> $DIR/reference_casting.rs:108:5
    |
 LL | /     std::ptr::write(
 LL | |
@@ -258,7 +267,16 @@ LL | |     );
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:111:5
+  --> $DIR/reference_casting.rs:113:5
+   |
+LL |     *((&std::cell::UnsafeCell::new(0)) as *const _ as *mut i32) = 5;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
+   = note: even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get`
+
+error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
+  --> $DIR/reference_casting.rs:117:5
    |
 LL |     let value = num as *const i32 as *mut i32;
    |                 ----------------------------- casting happend here
@@ -268,7 +286,7 @@ LL |     *value = 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:114:5
+  --> $DIR/reference_casting.rs:120:5
    |
 LL |     let value = num as *const i32 as *mut i32;
    |                 ----------------------------- casting happend here
@@ -279,7 +297,7 @@ LL |     *value_rebind = 1;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:116:5
+  --> $DIR/reference_casting.rs:122:5
    |
 LL |     *(num as *const i32).cast::<i32>().cast_mut() = 2;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -287,7 +305,7 @@ LL |     *(num as *const i32).cast::<i32>().cast_mut() = 2;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:118:5
+  --> $DIR/reference_casting.rs:124:5
    |
 LL |     *(num as *const _ as usize as *mut i32) = 2;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -295,7 +313,7 @@ LL |     *(num as *const _ as usize as *mut i32) = 2;
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:120:5
+  --> $DIR/reference_casting.rs:126:5
    |
 LL |     let value = num as *const i32 as *mut i32;
    |                 ----------------------------- casting happend here
@@ -306,7 +324,7 @@ LL |     std::ptr::write(value, 2);
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:122:5
+  --> $DIR/reference_casting.rs:128:5
    |
 LL |     let value = num as *const i32 as *mut i32;
    |                 ----------------------------- casting happend here
@@ -317,7 +335,7 @@ LL |     std::ptr::write_unaligned(value, 2);
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:124:5
+  --> $DIR/reference_casting.rs:130:5
    |
 LL |     let value = num as *const i32 as *mut i32;
    |                 ----------------------------- casting happend here
@@ -328,12 +346,12 @@ LL |     std::ptr::write_volatile(value, 2);
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
 error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
-  --> $DIR/reference_casting.rs:128:9
+  --> $DIR/reference_casting.rs:134:9
    |
 LL |         *(this as *const _ as *mut _) = a;
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
 
-error: aborting due to 38 previous errors
+error: aborting due to 40 previous errors
 
diff --git a/tests/ui/lint/register-tool-lint.stderr b/tests/ui/lint/register-tool-lint.stderr
index 842d845ff7c..7ebdbdec929 100644
--- a/tests/ui/lint/register-tool-lint.stderr
+++ b/tests/ui/lint/register-tool-lint.stderr
@@ -13,6 +13,7 @@ LL | #![warn(abc::my_lint)]
    |         ^^^
    |
    = help: add `#![register_tool(abc)]` to the crate root
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/lint/rfc-2383-lint-reason/expect_unused_inside_impl_block.rs b/tests/ui/lint/rfc-2383-lint-reason/expect_unused_inside_impl_block.rs
new file mode 100644
index 00000000000..1e2ff12a206
--- /dev/null
+++ b/tests/ui/lint/rfc-2383-lint-reason/expect_unused_inside_impl_block.rs
@@ -0,0 +1,30 @@
+// check-pass
+// incremental
+
+#![feature(lint_reasons)]
+#![warn(unused)]
+
+struct OneUnused;
+struct TwoUnused;
+
+impl OneUnused {
+    #[expect(unused)]
+    fn unused() {}
+}
+
+impl TwoUnused {
+    #[expect(unused)]
+    fn unused1(){}
+
+    // This unused method has `#[expect(unused)]`, so the compiler should not emit a warning.
+    // This ui test was added after a regression in the compiler where it did not recognize multiple
+    // `#[expect(unused)]` annotations inside of impl blocks.
+    // issue 114416
+    #[expect(unused)]
+    fn unused2(){}
+}
+
+fn main() {
+    let _ = OneUnused;
+    let _ = TwoUnused;
+}
diff --git a/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.rs b/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.rs
index 479ee198e17..77cb5e88bf7 100644
--- a/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.rs
+++ b/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.rs
@@ -1,24 +1,20 @@
+// compile-flags: -Zdeduplicate-diagnostics=yes
+
 #![feature(lint_reasons)]
 
 #[forbid(unused_variables)]
 //~^ NOTE `forbid` level set here
-//~| NOTE `forbid` level set here
 #[expect(unused_variables)]
 //~^ ERROR incompatible with previous forbid [E0453]
 //~| NOTE overruled by previous forbid
-//~| ERROR incompatible with previous forbid [E0453]
-//~| NOTE overruled by previous forbid
 fn expect_forbidden_lint_1() {}
 
 #[forbid(while_true)]
 //~^ NOTE `forbid` level set here
-//~| NOTE `forbid` level set here
 //~| NOTE the lint level is defined here
 #[expect(while_true)]
 //~^ ERROR incompatible with previous forbid [E0453]
 //~| NOTE overruled by previous forbid
-//~| ERROR incompatible with previous forbid [E0453]
-//~| NOTE overruled by previous forbid
 fn expect_forbidden_lint_2() {
     // This while loop will produce a `while_true` lint as the lint level
     // at this node is still `forbid` and the `while_true` check happens
diff --git a/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.stderr b/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.stderr
index a8116e93404..0f42ffbdea3 100644
--- a/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.stderr
+++ b/tests/ui/lint/rfc-2383-lint-reason/expect_with_forbid.stderr
@@ -1,32 +1,14 @@
 error[E0453]: expect(unused_variables) incompatible with previous forbid
-  --> $DIR/expect_with_forbid.rs:6:10
+  --> $DIR/expect_with_forbid.rs:7:10
    |
 LL | #[forbid(unused_variables)]
    |          ---------------- `forbid` level set here
-...
-LL | #[expect(unused_variables)]
-   |          ^^^^^^^^^^^^^^^^ overruled by previous forbid
-
-error[E0453]: expect(while_true) incompatible with previous forbid
-  --> $DIR/expect_with_forbid.rs:17:10
-   |
-LL | #[forbid(while_true)]
-   |          ---------- `forbid` level set here
-...
-LL | #[expect(while_true)]
-   |          ^^^^^^^^^^ overruled by previous forbid
-
-error[E0453]: expect(unused_variables) incompatible with previous forbid
-  --> $DIR/expect_with_forbid.rs:6:10
-   |
-LL | #[forbid(unused_variables)]
-   |          ---------------- `forbid` level set here
-...
+LL |
 LL | #[expect(unused_variables)]
    |          ^^^^^^^^^^^^^^^^ overruled by previous forbid
 
 error[E0453]: expect(while_true) incompatible with previous forbid
-  --> $DIR/expect_with_forbid.rs:17:10
+  --> $DIR/expect_with_forbid.rs:15:10
    |
 LL | #[forbid(while_true)]
    |          ---------- `forbid` level set here
@@ -35,17 +17,17 @@ LL | #[expect(while_true)]
    |          ^^^^^^^^^^ overruled by previous forbid
 
 error: denote infinite loops with `loop { ... }`
-  --> $DIR/expect_with_forbid.rs:26:5
+  --> $DIR/expect_with_forbid.rs:22:5
    |
 LL |     while true {}
    |     ^^^^^^^^^^ help: use `loop`
    |
 note: the lint level is defined here
-  --> $DIR/expect_with_forbid.rs:13:10
+  --> $DIR/expect_with_forbid.rs:12:10
    |
 LL | #[forbid(while_true)]
    |          ^^^^^^^^^^
 
-error: aborting due to 5 previous errors
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0453`.
diff --git a/tests/ui/lint/unaligned_references.rs b/tests/ui/lint/unaligned_references.rs
index 0c9c79c08b2..3f6dab35475 100644
--- a/tests/ui/lint/unaligned_references.rs
+++ b/tests/ui/lint/unaligned_references.rs
@@ -1,3 +1,6 @@
+use std::mem::ManuallyDrop;
+use std::fmt::Debug;
+
 #[repr(packed)]
 pub struct Good {
     data: u64,
@@ -27,6 +30,26 @@ impl Foo for Packed2 {
     }
 }
 
+// Test for #115396
+fn packed_dyn() {
+    #[repr(packed)]
+    struct Unaligned<T: ?Sized>(ManuallyDrop<T>);
+
+    let ref local = Unaligned(ManuallyDrop::new([3, 5, 8u64]));
+    let foo: &Unaligned<dyn Debug> = &*local;
+    println!("{:?}", &*foo.0); //~ ERROR reference to packed field
+    let foo: &Unaligned<[u64]> = &*local;
+    println!("{:?}", &*foo.0); //~ ERROR reference to packed field
+
+    // Even if the actual alignment is 1, we cannot know that when looking at `dyn Debug.`
+    let ref local = Unaligned(ManuallyDrop::new([3, 5, 8u8]));
+    let foo: &Unaligned<dyn Debug> = &*local;
+    println!("{:?}", &*foo.0); //~ ERROR reference to packed field
+    // However, we *can* know the alignment when looking at a slice.
+    let foo: &Unaligned<[u8]> = &*local;
+    println!("{:?}", &*foo.0); // no error!
+}
+
 fn main() {
     unsafe {
         let good = Good { data: 0, ptr: &0, data2: [0, 0], aligned: [0; 32] };
diff --git a/tests/ui/lint/unaligned_references.stderr b/tests/ui/lint/unaligned_references.stderr
index d3abc37669f..328cafbd986 100644
--- a/tests/ui/lint/unaligned_references.stderr
+++ b/tests/ui/lint/unaligned_references.stderr
@@ -1,5 +1,5 @@
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:25:13
+  --> $DIR/unaligned_references.rs:28:13
    |
 LL |             &self.x;
    |             ^^^^^^^
@@ -9,7 +9,37 @@ LL |             &self.x;
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:34:17
+  --> $DIR/unaligned_references.rs:40:24
+   |
+LL |     println!("{:?}", &*foo.0);
+   |                        ^^^^^
+   |
+   = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
+   = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
+   = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
+
+error[E0793]: reference to packed field is unaligned
+  --> $DIR/unaligned_references.rs:42:24
+   |
+LL |     println!("{:?}", &*foo.0);
+   |                        ^^^^^
+   |
+   = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
+   = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
+   = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
+
+error[E0793]: reference to packed field is unaligned
+  --> $DIR/unaligned_references.rs:47:24
+   |
+LL |     println!("{:?}", &*foo.0);
+   |                        ^^^^^
+   |
+   = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
+   = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
+   = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
+
+error[E0793]: reference to packed field is unaligned
+  --> $DIR/unaligned_references.rs:57:17
    |
 LL |         let _ = &good.ptr;
    |                 ^^^^^^^^^
@@ -19,7 +49,7 @@ LL |         let _ = &good.ptr;
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:35:17
+  --> $DIR/unaligned_references.rs:58:17
    |
 LL |         let _ = &good.data;
    |                 ^^^^^^^^^^
@@ -29,7 +59,7 @@ LL |         let _ = &good.data;
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:37:17
+  --> $DIR/unaligned_references.rs:60:17
    |
 LL |         let _ = &good.data as *const _;
    |                 ^^^^^^^^^^
@@ -39,7 +69,7 @@ LL |         let _ = &good.data as *const _;
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:38:27
+  --> $DIR/unaligned_references.rs:61:27
    |
 LL |         let _: *const _ = &good.data;
    |                           ^^^^^^^^^^
@@ -49,7 +79,7 @@ LL |         let _: *const _ = &good.data;
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:40:17
+  --> $DIR/unaligned_references.rs:63:17
    |
 LL |         let _ = good.data.clone();
    |                 ^^^^^^^^^
@@ -59,7 +89,7 @@ LL |         let _ = good.data.clone();
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:42:17
+  --> $DIR/unaligned_references.rs:65:17
    |
 LL |         let _ = &good.data2[0];
    |                 ^^^^^^^^^^^^^^
@@ -69,7 +99,7 @@ LL |         let _ = &good.data2[0];
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:51:17
+  --> $DIR/unaligned_references.rs:74:17
    |
 LL |         let _ = &packed2.x;
    |                 ^^^^^^^^^^
@@ -79,7 +109,7 @@ LL |         let _ = &packed2.x;
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:90:20
+  --> $DIR/unaligned_references.rs:113:20
    |
 LL |         let _ref = &m1.1.a;
    |                    ^^^^^^^
@@ -89,7 +119,7 @@ LL |         let _ref = &m1.1.a;
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
 error[E0793]: reference to packed field is unaligned
-  --> $DIR/unaligned_references.rs:93:20
+  --> $DIR/unaligned_references.rs:116:20
    |
 LL |         let _ref = &m2.1.a;
    |                    ^^^^^^^
@@ -98,6 +128,6 @@ LL |         let _ref = &m2.1.a;
    = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
    = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
 
-error: aborting due to 10 previous errors
+error: aborting due to 13 previous errors
 
 For more information about this error, try `rustc --explain E0793`.
diff --git a/tests/ui/loops/loop-break-value.stderr b/tests/ui/loops/loop-break-value.stderr
index 6c83bc7575c..a691960f962 100644
--- a/tests/ui/loops/loop-break-value.stderr
+++ b/tests/ui/loops/loop-break-value.stderr
@@ -319,7 +319,7 @@ error[E0308]: mismatched types
   --> $DIR/loop-break-value.rs:159:15
    |
 LL | fn main() {
-   |           - expected `()` because of this return type
+   |          - expected `()` because of this return type
 ...
 LL |     loop { // point at the return type
    |     ---- this loop is expected to be of type `()`
diff --git a/tests/ui/lub-glb/old-lub-glb-object.stderr b/tests/ui/lub-glb/old-lub-glb-object.stderr
index 3d0c171e013..c476d6f692b 100644
--- a/tests/ui/lub-glb/old-lub-glb-object.stderr
+++ b/tests/ui/lub-glb/old-lub-glb-object.stderr
@@ -15,6 +15,7 @@ LL |         _ => y,
    |
    = note: expected trait object `dyn for<'a, 'b> Foo<&'a u8, &'b u8>`
               found trait object `dyn for<'a> Foo<&'a u8, &'a u8>`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/macros/builtin-std-paths-fail.stderr b/tests/ui/macros/builtin-std-paths-fail.stderr
index 004a39043b7..331943843c0 100644
--- a/tests/ui/macros/builtin-std-paths-fail.stderr
+++ b/tests/ui/macros/builtin-std-paths-fail.stderr
@@ -15,12 +15,16 @@ error[E0433]: failed to resolve: could not find `RustcDecodable` in `core`
    |
 LL |     core::RustcDecodable,
    |           ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `core`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0433]: failed to resolve: could not find `RustcDecodable` in `core`
   --> $DIR/builtin-std-paths-fail.rs:4:11
    |
 LL |     core::RustcDecodable,
    |           ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `core`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0433]: failed to resolve: could not find `bench` in `core`
   --> $DIR/builtin-std-paths-fail.rs:7:9
@@ -63,12 +67,16 @@ error[E0433]: failed to resolve: could not find `RustcDecodable` in `std`
    |
 LL |     std::RustcDecodable,
    |          ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `std`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0433]: failed to resolve: could not find `RustcDecodable` in `std`
   --> $DIR/builtin-std-paths-fail.rs:16:10
    |
 LL |     std::RustcDecodable,
    |          ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `std`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0433]: failed to resolve: could not find `bench` in `std`
   --> $DIR/builtin-std-paths-fail.rs:19:8
diff --git a/tests/ui/macros/meta-item-absolute-path.stderr b/tests/ui/macros/meta-item-absolute-path.stderr
index c53971e245f..f0d763d7abb 100644
--- a/tests/ui/macros/meta-item-absolute-path.stderr
+++ b/tests/ui/macros/meta-item-absolute-path.stderr
@@ -9,6 +9,8 @@ error[E0433]: failed to resolve: maybe a missing crate `Absolute`?
    |
 LL | #[derive(::Absolute)]
    |            ^^^^^^^^ maybe a missing crate `Absolute`?
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/macros/stringify.rs b/tests/ui/macros/stringify.rs
index 816f99baa84..8b4e6250a30 100644
--- a/tests/ui/macros/stringify.rs
+++ b/tests/ui/macros/stringify.rs
@@ -3,6 +3,7 @@
 // compile-flags: --test
 
 #![feature(async_closure)]
+#![feature(auto_traits)]
 #![feature(box_patterns)]
 #![feature(const_trait_impl)]
 #![feature(decl_macro)]
diff --git a/tests/ui/methods/method-ambig-one-trait-unknown-int-type.stderr b/tests/ui/methods/method-ambig-one-trait-unknown-int-type.stderr
index e0f8a5447b0..0a022dc3984 100644
--- a/tests/ui/methods/method-ambig-one-trait-unknown-int-type.stderr
+++ b/tests/ui/methods/method-ambig-one-trait-unknown-int-type.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `Vec<T>`
   --> $DIR/method-ambig-one-trait-unknown-int-type.rs:24:9
    |
 LL |     let mut x = Vec::new();
-   |         ^^^^^
+   |         ^^^^^   ---------- type must be known at this point
    |
 help: consider giving `x` an explicit type, where the type for type parameter `T` is specified
    |
diff --git a/tests/ui/mismatched_types/issue-19109.stderr b/tests/ui/mismatched_types/issue-19109.stderr
index 5cef64bb169..ca819d93a50 100644
--- a/tests/ui/mismatched_types/issue-19109.stderr
+++ b/tests/ui/mismatched_types/issue-19109.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-19109.rs:4:5
    |
 LL | fn function(t: &mut dyn Trait) {
-   |                                - help: try adding a return type: `-> *mut dyn Trait`
+   |                               - help: try adding a return type: `-> *mut dyn Trait`
 LL |     t as *mut dyn Trait
    |     ^^^^^^^^^^^^^^^^^^^ expected `()`, found `*mut dyn Trait`
    |
diff --git a/tests/ui/native-library-link-flags/modifiers-override.stderr b/tests/ui/native-library-link-flags/modifiers-override.stderr
index eb3ab55c310..64427651e9f 100644
--- a/tests/ui/native-library-link-flags/modifiers-override.stderr
+++ b/tests/ui/native-library-link-flags/modifiers-override.stderr
@@ -21,6 +21,8 @@ error: overriding linking modifiers from command line is not supported
    |
 LL | extern "C" {}
    | ^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/never_type/never-value-fallback-issue-66757.nofallback.stderr b/tests/ui/never_type/never-value-fallback-issue-66757.nofallback.stderr
index 54c16230fe6..cb378630589 100644
--- a/tests/ui/never_type/never-value-fallback-issue-66757.nofallback.stderr
+++ b/tests/ui/never_type/never-value-fallback-issue-66757.nofallback.stderr
@@ -5,6 +5,7 @@ LL |     <E as From<_>>::from(never);
    |      ^ the trait `From<()>` is not implemented for `E`
    |
    = help: the trait `From<!>` is implemented for `E`
+   = help: for that trait implementation, expected `!`, found `()`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/nll/closure-malformed-projection-input-issue-102800.stderr b/tests/ui/nll/closure-malformed-projection-input-issue-102800.stderr
index 46dba006433..aeb0a1394cc 100644
--- a/tests/ui/nll/closure-malformed-projection-input-issue-102800.stderr
+++ b/tests/ui/nll/closure-malformed-projection-input-issue-102800.stderr
@@ -15,6 +15,7 @@ LL |     let _: for<'a> fn(<&'a () as Trait>::Ty) = |_| {};
    |
    = note: `&'0 ()` must implement `Trait`, for any lifetime `'0`...
    = note: ...but `Trait` is actually implemented for the type `&'static ()`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/nll/issue-97997.stderr b/tests/ui/nll/issue-97997.stderr
index 46440c021f5..89eaf77adf0 100644
--- a/tests/ui/nll/issue-97997.stderr
+++ b/tests/ui/nll/issue-97997.stderr
@@ -15,6 +15,7 @@ LL |     <fn(&u8) as Foo>::ASSOC;
    |
    = note: `Foo` would have to be implemented for the type `for<'a> fn(&'a u8)`
    = note: ...but `Foo` is actually implemented for the type `fn(&'0 u8)`, for some specific lifetime `'0`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/nll/missing-universe-cause-issue-114907.stderr b/tests/ui/nll/missing-universe-cause-issue-114907.stderr
index c3dd4257a73..988eee61027 100644
--- a/tests/ui/nll/missing-universe-cause-issue-114907.stderr
+++ b/tests/ui/nll/missing-universe-cause-issue-114907.stderr
@@ -38,6 +38,7 @@ LL |     accept(callback);
    |
    = note: closure with signature `fn(&'2 ())` must implement `FnOnce<(&'1 (),)>`, for any lifetime `'1`...
    = note: ...but it actually implements `FnOnce<(&'2 (),)>`, for some specific lifetime `'2`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0308]: mismatched types
   --> $DIR/missing-universe-cause-issue-114907.rs:33:5
@@ -73,6 +74,8 @@ error: higher-ranked subtype error
    |
 LL |     accept(callback);
    |                     ^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/nll/relate_tys/impl-fn-ignore-binder-via-bottom.stderr b/tests/ui/nll/relate_tys/impl-fn-ignore-binder-via-bottom.stderr
index b945ffedda5..804071a3e6f 100644
--- a/tests/ui/nll/relate_tys/impl-fn-ignore-binder-via-bottom.stderr
+++ b/tests/ui/nll/relate_tys/impl-fn-ignore-binder-via-bottom.stderr
@@ -15,6 +15,7 @@ LL |     let _x = <fn(&())>::make_f();
    |
    = note: `Y` would have to be implemented for the type `for<'a> fn(&'a ())`
    = note: ...but `Y` is actually implemented for the type `fn(&'0 ())`, for some specific lifetime `'0`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: implementation of `Y` is not general enough
   --> $DIR/impl-fn-ignore-binder-via-bottom.rs:30:14
@@ -24,6 +25,7 @@ LL |     let _x = <fn(&())>::make_f();
    |
    = note: `Y` would have to be implemented for the type `for<'a> fn(&'a ())`
    = note: ...but `Y` is actually implemented for the type `fn(&'0 ())`, for some specific lifetime `'0`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/nll/type-check-pointer-comparisons.stderr b/tests/ui/nll/type-check-pointer-comparisons.stderr
index 0d8480a42c1..37098b585df 100644
--- a/tests/ui/nll/type-check-pointer-comparisons.stderr
+++ b/tests/ui/nll/type-check-pointer-comparisons.stderr
@@ -61,6 +61,8 @@ LL |     x == y;
    = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
 
 help: `'a` and `'b` must be the same: replace one with the other
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: lifetime may not live long enough
   --> $DIR/type-check-pointer-comparisons.rs:16:5
@@ -93,6 +95,8 @@ LL |     f == g;
    = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
 
 help: `'a` and `'b` must be the same: replace one with the other
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/nll/user-annotations/normalization-2.stderr b/tests/ui/nll/user-annotations/normalization-2.stderr
index 6b0dcb414ae..dcf049a7a61 100644
--- a/tests/ui/nll/user-annotations/normalization-2.stderr
+++ b/tests/ui/nll/user-annotations/normalization-2.stderr
@@ -131,6 +131,7 @@ help: the following changes may resolve your lifetime errors
    |
    = help: replace `'a` with `'static`
    = help: replace `'b` with `'static`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: lifetime may not live long enough
   --> $DIR/normalization-2.rs:89:5
@@ -185,6 +186,7 @@ help: the following changes may resolve your lifetime errors
    |
    = help: replace `'a` with `'static`
    = help: replace `'b` with `'static`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: lifetime may not live long enough
   --> $DIR/normalization-2.rs:117:5
diff --git a/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr b/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr
index d0a4179fe3e..659679e4440 100644
--- a/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr
+++ b/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr
@@ -14,6 +14,7 @@ LL | fn foo(_: &dyn Foo<Bar = ()>) {}
    |                    ^^^^^^^^ help: remove this bound
    |
    = note: this associated type has a `where Self: Sized` bound. Thus, while the associated type can be specified, it cannot be used in any way, because trait objects are not `Sized`.
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unnecessary associated type bound for not object safe associated type
   --> $DIR/assoc_type_bounds_sized_unnecessary.rs:9:20
@@ -22,6 +23,7 @@ LL | fn foo(_: &dyn Foo<Bar = ()>) {}
    |                    ^^^^^^^^ help: remove this bound
    |
    = note: this associated type has a `where Self: Sized` bound. Thus, while the associated type can be specified, it cannot be used in any way, because trait objects are not `Sized`.
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/offset-of/offset-of-output-type.stderr b/tests/ui/offset-of/offset-of-output-type.stderr
index 6133f3263ab..233d4987643 100644
--- a/tests/ui/offset-of/offset-of-output-type.stderr
+++ b/tests/ui/offset-of/offset-of-output-type.stderr
@@ -42,7 +42,7 @@ error[E0308]: mismatched types
   --> $DIR/offset-of-output-type.rs:19:5
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 ...
 LL |     offset_of!(S, v)
    |     ^^^^^^^^^^^^^^^^ expected `()`, found `usize`
diff --git a/tests/ui/on-unimplemented/impl-substs.stderr b/tests/ui/on-unimplemented/impl-substs.stderr
index a0fad0acd0b..36d80f3e681 100644
--- a/tests/ui/on-unimplemented/impl-substs.stderr
+++ b/tests/ui/on-unimplemented/impl-substs.stderr
@@ -7,7 +7,8 @@ LL |     Foo::<usize>::foo((1i32, 1i32, 1i32));
    |     required by a bound introduced by this call
    |
    = help: the trait `Foo<usize>` is not implemented for `(i32, i32, i32)`
-   = help: the trait `Foo<A>` is implemented for `(A, B, C)`
+   = help: the trait `Foo<i32>` is implemented for `(i32, i32, i32)`
+   = help: for that trait implementation, expected `i32`, found `usize`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/on-unimplemented/on-impl.stderr b/tests/ui/on-unimplemented/on-impl.stderr
index 2253c5992a6..3a0b8353fa5 100644
--- a/tests/ui/on-unimplemented/on-impl.stderr
+++ b/tests/ui/on-unimplemented/on-impl.stderr
@@ -8,6 +8,7 @@ LL |     Index::<u32>::index(&[1, 2, 3] as &[i32], 2u32);
    |
    = help: the trait `Index<u32>` is not implemented for `[i32]`
    = help: the trait `Index<usize>` is implemented for `[i32]`
+   = help: for that trait implementation, expected `usize`, found `u32`
 
 error[E0277]: the trait bound `[i32]: Index<u32>` is not satisfied
   --> $DIR/on-impl.rs:22:5
@@ -17,6 +18,7 @@ LL |     Index::<u32>::index(&[1, 2, 3] as &[i32], 2u32);
    |
    = help: the trait `Index<u32>` is not implemented for `[i32]`
    = help: the trait `Index<usize>` is implemented for `[i32]`
+   = help: for that trait implementation, expected `usize`, found `u32`
 
 error[E0277]: the trait bound `[i32]: Index<u32>` is not satisfied
   --> $DIR/on-impl.rs:22:5
@@ -26,6 +28,7 @@ LL |     Index::<u32>::index(&[1, 2, 3] as &[i32], 2u32);
    |
    = help: the trait `Index<u32>` is not implemented for `[i32]`
    = help: the trait `Index<usize>` is implemented for `[i32]`
+   = help: for that trait implementation, expected `usize`, found `u32`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/on-unimplemented/slice-index.stderr b/tests/ui/on-unimplemented/slice-index.stderr
index b9bca211f43..5e0117be529 100644
--- a/tests/ui/on-unimplemented/slice-index.stderr
+++ b/tests/ui/on-unimplemented/slice-index.stderr
@@ -5,7 +5,8 @@ LL |     x[1i32];
    |       ^^^^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[i32]>` is not implemented for `i32`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[i32]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `i32`
    = note: required for `[i32]` to implement `Index<i32>`
 
 error[E0277]: the type `[i32]` cannot be indexed by `RangeTo<i32>`
diff --git a/tests/ui/or-patterns/missing-bindings.stderr b/tests/ui/or-patterns/missing-bindings.stderr
index 4457b7893d5..7f182a85787 100644
--- a/tests/ui/or-patterns/missing-bindings.stderr
+++ b/tests/ui/or-patterns/missing-bindings.stderr
@@ -103,22 +103,6 @@ LL |     let (A(A(a, b) | B(c), d) | B(e)) = Y;
    |                 |
    |                 variable not in all patterns
 
-error[E0408]: variable `c` is not bound in all patterns
-  --> $DIR/missing-bindings.rs:45:33
-   |
-LL |     let (A(A(a, b) | B(c), d) | B(e)) = Y;
-   |                        -        ^^^^ pattern doesn't bind `c`
-   |                        |
-   |                        variable not in all patterns
-
-error[E0408]: variable `d` is not bound in all patterns
-  --> $DIR/missing-bindings.rs:45:33
-   |
-LL |     let (A(A(a, b) | B(c), d) | B(e)) = Y;
-   |                            -    ^^^^ pattern doesn't bind `d`
-   |                            |
-   |                            variable not in all patterns
-
 error[E0408]: variable `e` is not bound in all patterns
   --> $DIR/missing-bindings.rs:45:10
    |
@@ -143,6 +127,22 @@ LL |     let (A(A(a, b) | B(c), d) | B(e)) = Y;
    |                 |
    |                 variable not in all patterns
 
+error[E0408]: variable `c` is not bound in all patterns
+  --> $DIR/missing-bindings.rs:45:33
+   |
+LL |     let (A(A(a, b) | B(c), d) | B(e)) = Y;
+   |                        -        ^^^^ pattern doesn't bind `c`
+   |                        |
+   |                        variable not in all patterns
+
+error[E0408]: variable `d` is not bound in all patterns
+  --> $DIR/missing-bindings.rs:45:33
+   |
+LL |     let (A(A(a, b) | B(c), d) | B(e)) = Y;
+   |                            -    ^^^^ pattern doesn't bind `d`
+   |                            |
+   |                            variable not in all patterns
+
 error[E0408]: variable `a` is not bound in all patterns
   --> $DIR/missing-bindings.rs:61:29
    |
@@ -151,14 +151,6 @@ LL |                     Ok(a) | Err(_),
    |                        |
    |                        variable not in all patterns
 
-error[E0408]: variable `a` is not bound in all patterns
-  --> $DIR/missing-bindings.rs:69:21
-   |
-LL |                     A(_, a) |
-   |                          - variable not in all patterns
-LL |                     B(b),
-   |                     ^^^^ pattern doesn't bind `a`
-
 error[E0408]: variable `b` is not bound in all patterns
   --> $DIR/missing-bindings.rs:68:21
    |
@@ -168,6 +160,14 @@ LL |                     B(b),
    |                       - variable not in all patterns
 
 error[E0408]: variable `a` is not bound in all patterns
+  --> $DIR/missing-bindings.rs:69:21
+   |
+LL |                     A(_, a) |
+   |                          - variable not in all patterns
+LL |                     B(b),
+   |                     ^^^^ pattern doesn't bind `a`
+
+error[E0408]: variable `a` is not bound in all patterns
   --> $DIR/missing-bindings.rs:72:17
    |
 LL |                     A(_, a) |
@@ -185,6 +185,24 @@ LL |                     B(b),
 LL |                 B(_)
    |                 ^^^^ pattern doesn't bind `b`
 
+error[E0408]: variable `b` is not bound in all patterns
+  --> $DIR/missing-bindings.rs:57:13
+   |
+LL | /             V1(
+LL | |
+LL | |
+LL | |                 A(
+...  |
+LL | |                 B(Ok(a) | Err(a))
+LL | |             ) |
+   | |_____________^ pattern doesn't bind `b`
+...
+LL |                       B(b),
+   |                         - variable not in all patterns
+...
+LL |               V3(c),
+   |               ^^^^^ pattern doesn't bind `b`
+
 error[E0408]: variable `c` is not bound in all patterns
   --> $DIR/missing-bindings.rs:57:13
    |
@@ -219,24 +237,6 @@ LL |                     A(_, a) |
 LL |             V3(c),
    |             ^^^^^ pattern doesn't bind `a`
 
-error[E0408]: variable `b` is not bound in all patterns
-  --> $DIR/missing-bindings.rs:57:13
-   |
-LL | /             V1(
-LL | |
-LL | |
-LL | |                 A(
-...  |
-LL | |                 B(Ok(a) | Err(a))
-LL | |             ) |
-   | |_____________^ pattern doesn't bind `b`
-...
-LL |                       B(b),
-   |                         - variable not in all patterns
-...
-LL |               V3(c),
-   |               ^^^^^ pattern doesn't bind `b`
-
 error: aborting due to 26 previous errors
 
 For more information about this error, try `rustc --explain E0408`.
diff --git a/tests/ui/parser/assoc-const-underscore-semantic-fail.rs b/tests/ui/parser/assoc/assoc-const-underscore-semantic-fail.rs
index d37ce06c555..d37ce06c555 100644
--- a/tests/ui/parser/assoc-const-underscore-semantic-fail.rs
+++ b/tests/ui/parser/assoc/assoc-const-underscore-semantic-fail.rs
diff --git a/tests/ui/parser/assoc-const-underscore-semantic-fail.stderr b/tests/ui/parser/assoc/assoc-const-underscore-semantic-fail.stderr
index 538bf0ec100..538bf0ec100 100644
--- a/tests/ui/parser/assoc-const-underscore-semantic-fail.stderr
+++ b/tests/ui/parser/assoc/assoc-const-underscore-semantic-fail.stderr
diff --git a/tests/ui/parser/assoc-const-underscore-syntactic-pass.rs b/tests/ui/parser/assoc/assoc-const-underscore-syntactic-pass.rs
index 60da408c811..60da408c811 100644
--- a/tests/ui/parser/assoc-const-underscore-syntactic-pass.rs
+++ b/tests/ui/parser/assoc/assoc-const-underscore-syntactic-pass.rs
diff --git a/tests/ui/parser/assoc-oddities-1.rs b/tests/ui/parser/assoc/assoc-oddities-1.rs
index 5914805e5c1..5914805e5c1 100644
--- a/tests/ui/parser/assoc-oddities-1.rs
+++ b/tests/ui/parser/assoc/assoc-oddities-1.rs
diff --git a/tests/ui/parser/assoc-oddities-1.stderr b/tests/ui/parser/assoc/assoc-oddities-1.stderr
index acf71b4893a..acf71b4893a 100644
--- a/tests/ui/parser/assoc-oddities-1.stderr
+++ b/tests/ui/parser/assoc/assoc-oddities-1.stderr
diff --git a/tests/ui/parser/assoc-oddities-2.rs b/tests/ui/parser/assoc/assoc-oddities-2.rs
index 3d35aad7455..3d35aad7455 100644
--- a/tests/ui/parser/assoc-oddities-2.rs
+++ b/tests/ui/parser/assoc/assoc-oddities-2.rs
diff --git a/tests/ui/parser/assoc-oddities-2.stderr b/tests/ui/parser/assoc/assoc-oddities-2.stderr
index d3b90c34c29..d3b90c34c29 100644
--- a/tests/ui/parser/assoc-oddities-2.stderr
+++ b/tests/ui/parser/assoc/assoc-oddities-2.stderr
diff --git a/tests/ui/parser/assoc-static-semantic-fail.rs b/tests/ui/parser/assoc/assoc-static-semantic-fail.rs
index 403160f1253..403160f1253 100644
--- a/tests/ui/parser/assoc-static-semantic-fail.rs
+++ b/tests/ui/parser/assoc/assoc-static-semantic-fail.rs
diff --git a/tests/ui/parser/assoc-static-semantic-fail.stderr b/tests/ui/parser/assoc/assoc-static-semantic-fail.stderr
index 8178bd22373..8178bd22373 100644
--- a/tests/ui/parser/assoc-static-semantic-fail.stderr
+++ b/tests/ui/parser/assoc/assoc-static-semantic-fail.stderr
diff --git a/tests/ui/parser/assoc-static-syntactic-fail.rs b/tests/ui/parser/assoc/assoc-static-syntactic-fail.rs
index 492f2ea16ef..492f2ea16ef 100644
--- a/tests/ui/parser/assoc-static-syntactic-fail.rs
+++ b/tests/ui/parser/assoc/assoc-static-syntactic-fail.rs
diff --git a/tests/ui/parser/assoc-static-syntactic-fail.stderr b/tests/ui/parser/assoc/assoc-static-syntactic-fail.stderr
index e9723614512..e9723614512 100644
--- a/tests/ui/parser/assoc-static-syntactic-fail.stderr
+++ b/tests/ui/parser/assoc/assoc-static-syntactic-fail.stderr
diff --git a/tests/ui/parser/assoc-type-in-type-arg.rs b/tests/ui/parser/assoc/assoc-type-in-type-arg.rs
index 000956ea24f..000956ea24f 100644
--- a/tests/ui/parser/assoc-type-in-type-arg.rs
+++ b/tests/ui/parser/assoc/assoc-type-in-type-arg.rs
diff --git a/tests/ui/parser/assoc-type-in-type-arg.stderr b/tests/ui/parser/assoc/assoc-type-in-type-arg.stderr
index b637702f21e..b637702f21e 100644
--- a/tests/ui/parser/assoc-type-in-type-arg.stderr
+++ b/tests/ui/parser/assoc/assoc-type-in-type-arg.stderr
diff --git a/tests/ui/parser/associated-types-project-from-hrtb-explicit.rs b/tests/ui/parser/assoc/associated-types-project-from-hrtb-explicit.rs
index b238a9ca226..b238a9ca226 100644
--- a/tests/ui/parser/associated-types-project-from-hrtb-explicit.rs
+++ b/tests/ui/parser/assoc/associated-types-project-from-hrtb-explicit.rs
diff --git a/tests/ui/parser/associated-types-project-from-hrtb-explicit.stderr b/tests/ui/parser/assoc/associated-types-project-from-hrtb-explicit.stderr
index aa0fa0e3c0a..aa0fa0e3c0a 100644
--- a/tests/ui/parser/associated-types-project-from-hrtb-explicit.stderr
+++ b/tests/ui/parser/assoc/associated-types-project-from-hrtb-explicit.stderr
diff --git a/tests/ui/parser/attr-stmt-expr-attr-bad.stderr b/tests/ui/parser/attr-stmt-expr-attr-bad.stderr
index 96899fd3fc5..e46c591080d 100644
--- a/tests/ui/parser/attr-stmt-expr-attr-bad.stderr
+++ b/tests/ui/parser/attr-stmt-expr-attr-bad.stderr
@@ -27,6 +27,7 @@ LL | #[cfg(FALSE)] fn e() { let _ = foo(#![attr]); }
    |
    = note: inner attributes, like `#![no_std]`, annotate the item enclosing them, and are usually found at the beginning of source files
    = note: outer attributes, like `#[test]`, annotate the item following them
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: expected expression, found `)`
   --> $DIR/attr-stmt-expr-attr-bad.rs:7:44
diff --git a/tests/ui/parser/issues/issue-15980.rs b/tests/ui/parser/issues/issue-15980.rs
index 87faa7d5ff1..eb7b6ca8296 100644
--- a/tests/ui/parser/issues/issue-15980.rs
+++ b/tests/ui/parser/issues/issue-15980.rs
@@ -9,9 +9,6 @@ fn main(){
             //~^ ERROR expected identifier, found keyword `return`
             //~| NOTE expected identifier, found keyword
         }
-        //~^ NOTE expected one of `.`, `=>`, `?`, or an operator
         _ => {}
-        //~^ ERROR expected one of `.`, `=>`, `?`, or an operator, found reserved identifier `_`
-        //~| NOTE unexpected token
     }
 }
diff --git a/tests/ui/parser/issues/issue-15980.stderr b/tests/ui/parser/issues/issue-15980.stderr
index c59c811199e..cf8d0114787 100644
--- a/tests/ui/parser/issues/issue-15980.stderr
+++ b/tests/ui/parser/issues/issue-15980.stderr
@@ -11,15 +11,10 @@ help: escape `return` to use it as an identifier
    |
 LL |             r#return
    |             ++
-
-error: expected one of `.`, `=>`, `?`, or an operator, found reserved identifier `_`
-  --> $DIR/issue-15980.rs:13:9
+help: you might have meant to start a match arm after the match guard
    |
-LL |         }
-   |          - expected one of `.`, `=>`, `?`, or an operator
-LL |
-LL |         _ => {}
-   |         ^ unexpected token
+LL |         Err(ref e) if e.kind == io::EndOfFile => {
+   |                                               ++
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
diff --git a/tests/ui/parser/issues/issue-52496.stderr b/tests/ui/parser/issues/issue-52496.stderr
index 77335c64c21..78c81bf5b0d 100644
--- a/tests/ui/parser/issues/issue-52496.stderr
+++ b/tests/ui/parser/issues/issue-52496.stderr
@@ -8,10 +8,15 @@ error: expected one of `,`, `:`, or `}`, found `.`
   --> $DIR/issue-52496.rs:8:22
    |
 LL |     let _ = Foo { bar.into(), bat: -1, . };
-   |             ---   -  ^ expected one of `,`, `:`, or `}`
+   |             ---   ---^ expected one of `,`, `:`, or `}`
    |             |     |
-   |             |     help: try naming a field: `bar:`
+   |             |     while parsing this struct field
    |             while parsing this struct
+   |
+help: try naming a field
+   |
+LL |     let _ = Foo { bar: bar.into(), bat: -1, . };
+   |                   ++++
 
 error: expected identifier, found `.`
   --> $DIR/issue-52496.rs:8:40
diff --git a/tests/ui/parser/issues/issue-84117.stderr b/tests/ui/parser/issues/issue-84117.stderr
index 237bc11bd06..958f3b40bb0 100644
--- a/tests/ui/parser/issues/issue-84117.stderr
+++ b/tests/ui/parser/issues/issue-84117.stderr
@@ -47,6 +47,7 @@ LL |     let outer_local:e_outer<&str, { let inner_local:e_inner<&str, }
    |                                         |
    |                                         while parsing the type for `inner_local`
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: you might have meant to end the type parameters here
    |
 LL |     let outer_local:e_outer<&str, { let inner_local:e_inner<&str>, }
@@ -61,6 +62,8 @@ error: expected one of `!`, `.`, `::`, `;`, `?`, `else`, `{`, or an operator, fo
    |
 LL |     let outer_local:e_outer<&str, { let inner_local:e_inner<&str, }
    |                                                                 ^ expected one of 8 possible tokens
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: expected one of `!`, `.`, `::`, `;`, `?`, `else`, `{`, or an operator, found `,`
   --> $DIR/issue-84117.rs:2:33
diff --git a/tests/ui/parser/issues/issue-89396.fixed b/tests/ui/parser/issues/issue-89396.fixed
index 823ad8cd1f8..0c040ddea44 100644
--- a/tests/ui/parser/issues/issue-89396.fixed
+++ b/tests/ui/parser/issues/issue-89396.fixed
@@ -8,9 +8,9 @@ fn main() {
     let _ = match opt {
         Some(_) => true,
         //~^ ERROR: expected one of
-        //~| HELP: try using a fat arrow here
+        //~| HELP: use a fat arrow to start a match arm
         None => false,
         //~^ ERROR: expected one of
-        //~| HELP: try using a fat arrow here
+        //~| HELP: use a fat arrow to start a match arm
     };
 }
diff --git a/tests/ui/parser/issues/issue-89396.rs b/tests/ui/parser/issues/issue-89396.rs
index f1d9efa524f..d95f666d797 100644
--- a/tests/ui/parser/issues/issue-89396.rs
+++ b/tests/ui/parser/issues/issue-89396.rs
@@ -8,9 +8,9 @@ fn main() {
     let _ = match opt {
         Some(_) = true,
         //~^ ERROR: expected one of
-        //~| HELP: try using a fat arrow here
+        //~| HELP: use a fat arrow to start a match arm
         None -> false,
         //~^ ERROR: expected one of
-        //~| HELP: try using a fat arrow here
+        //~| HELP: use a fat arrow to start a match arm
     };
 }
diff --git a/tests/ui/parser/issues/issue-89396.stderr b/tests/ui/parser/issues/issue-89396.stderr
index 504420574e2..41ce0705074 100644
--- a/tests/ui/parser/issues/issue-89396.stderr
+++ b/tests/ui/parser/issues/issue-89396.stderr
@@ -5,7 +5,7 @@ LL |         Some(_) = true,
    |                 ^
    |                 |
    |                 expected one of `=>`, `if`, or `|`
-   |                 help: try using a fat arrow here: `=>`
+   |                 help: use a fat arrow to start a match arm: `=>`
 
 error: expected one of `=>`, `@`, `if`, or `|`, found `->`
   --> $DIR/issue-89396.rs:12:14
@@ -14,7 +14,7 @@ LL |         None -> false,
    |              ^^
    |              |
    |              expected one of `=>`, `@`, `if`, or `|`
-   |              help: try using a fat arrow here: `=>`
+   |              help: use a fat arrow to start a match arm: `=>`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/parser/macro/macro-repeat.stderr b/tests/ui/parser/macro/macro-repeat.stderr
index 63554b197b9..ade2bbf9b0b 100644
--- a/tests/ui/parser/macro/macro-repeat.stderr
+++ b/tests/ui/parser/macro/macro-repeat.stderr
@@ -9,6 +9,8 @@ error: variable 'v' is still repeating at this depth
    |
 LL |         $v
    |         ^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/parser/missing-fat-arrow.rs b/tests/ui/parser/missing-fat-arrow.rs
new file mode 100644
index 00000000000..325f1ccf2fd
--- /dev/null
+++ b/tests/ui/parser/missing-fat-arrow.rs
@@ -0,0 +1,38 @@
+fn main() {
+    let x = 1;
+    let y = 2;
+    let value = 3;
+
+    match value {
+        Some(x) if x == y {
+            self.next_token()?; //~ ERROR expected identifier, found keyword `self`
+        },
+        _ => {}
+    }
+    let _: i32 = (); //~ ERROR mismatched types
+}
+
+struct Foo {
+    value: usize
+}
+
+fn foo(a: Option<&mut Foo>, b: usize) {
+    match a {
+        Some(a) if a.value == b {
+            a.value = 1; //~ ERROR expected one of `,`, `:`, or `}`, found `.`
+        },
+        _ => {}
+    }
+    let _: i32 = (); //~ ERROR mismatched types
+}
+
+fn bar(a: Option<&mut Foo>, b: usize) {
+    match a {
+        Some(a) if a.value == b {
+            a.value, //~ ERROR expected one of `,`, `:`, or `}`, found `.`
+        } => {
+        }
+        _ => {}
+    }
+    let _: i32 = (); //~ ERROR mismatched types
+}
diff --git a/tests/ui/parser/missing-fat-arrow.stderr b/tests/ui/parser/missing-fat-arrow.stderr
new file mode 100644
index 00000000000..a6c786905e9
--- /dev/null
+++ b/tests/ui/parser/missing-fat-arrow.stderr
@@ -0,0 +1,78 @@
+error: expected identifier, found keyword `self`
+  --> $DIR/missing-fat-arrow.rs:8:13
+   |
+LL |         Some(x) if x == y {
+   |                         - while parsing this struct
+LL |             self.next_token()?;
+   |             ^^^^ expected identifier, found keyword
+   |
+help: you might have meant to start a match arm after the match guard
+   |
+LL |         Some(x) if x == y => {
+   |                           ++
+
+error: expected one of `,`, `:`, or `}`, found `.`
+  --> $DIR/missing-fat-arrow.rs:22:14
+   |
+LL |         Some(a) if a.value == b {
+   |                               - while parsing this struct
+LL |             a.value = 1;
+   |             -^ expected one of `,`, `:`, or `}`
+   |             |
+   |             while parsing this struct field
+   |
+help: try naming a field
+   |
+LL |             a: a.value = 1;
+   |             ++
+help: you might have meant to start a match arm after the match guard
+   |
+LL |         Some(a) if a.value == b => {
+   |                                 ++
+
+error: expected one of `,`, `:`, or `}`, found `.`
+  --> $DIR/missing-fat-arrow.rs:32:14
+   |
+LL |         Some(a) if a.value == b {
+   |                               - while parsing this struct
+LL |             a.value,
+   |             -^ expected one of `,`, `:`, or `}`
+   |             |
+   |             while parsing this struct field
+   |
+help: try naming a field
+   |
+LL |             a: a.value,
+   |             ++
+help: you might have meant to start a match arm after the match guard
+   |
+LL |         Some(a) if a.value == b => {
+   |                                 ++
+
+error[E0308]: mismatched types
+  --> $DIR/missing-fat-arrow.rs:12:18
+   |
+LL |     let _: i32 = ();
+   |            ---   ^^ expected `i32`, found `()`
+   |            |
+   |            expected due to this
+
+error[E0308]: mismatched types
+  --> $DIR/missing-fat-arrow.rs:26:18
+   |
+LL |     let _: i32 = ();
+   |            ---   ^^ expected `i32`, found `()`
+   |            |
+   |            expected due to this
+
+error[E0308]: mismatched types
+  --> $DIR/missing-fat-arrow.rs:37:18
+   |
+LL |     let _: i32 = ();
+   |            ---   ^^ expected `i32`, found `()`
+   |            |
+   |            expected due to this
+
+error: aborting due to 6 previous errors
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/tests/ui/parser/recover-quantified-closure.stderr b/tests/ui/parser/recover-quantified-closure.stderr
index 39eec80f658..37e93cbee7b 100644
--- a/tests/ui/parser/recover-quantified-closure.stderr
+++ b/tests/ui/parser/recover-quantified-closure.stderr
@@ -25,10 +25,10 @@ LL |     for <Foo>::Bar in x {}
    = help: consider removing `for<...>`
 
 error: implicit types in closure signatures are forbidden when `for<...>` is present
-  --> $DIR/recover-quantified-closure.rs:2:25
+  --> $DIR/recover-quantified-closure.rs:2:24
    |
 LL |     for<'a> |x: &'a u8| *x + 1;
-   |     -------             ^
+   |     -------            ^
    |     |
    |     `for<...>` is here
 
diff --git a/tests/ui/parser/removed-syntax-with-2.stderr b/tests/ui/parser/removed-syntax-with-2.stderr
index c6ae1ce674f..e75c5bcd643 100644
--- a/tests/ui/parser/removed-syntax-with-2.stderr
+++ b/tests/ui/parser/removed-syntax-with-2.stderr
@@ -2,8 +2,9 @@ error: expected one of `,`, `:`, or `}`, found `a`
   --> $DIR/removed-syntax-with-2.rs:8:31
    |
 LL |     let b = S { foo: (), with a };
-   |             -                 ^ expected one of `,`, `:`, or `}`
-   |             |
+   |             -            ---- ^ expected one of `,`, `:`, or `}`
+   |             |            |
+   |             |            while parsing this struct field
    |             while parsing this struct
 
 error[E0063]: missing field `bar` in initializer of `S`
diff --git a/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr b/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
index c0a6558a1bf..0b432487615 100644
--- a/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
+++ b/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
@@ -307,6 +307,7 @@ LL |         ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false
    |                                                                  ^ move occurs because `b` has type `&mut U`, which does not implement the `Copy` trait
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0507]: cannot move out of `a` in pattern guard
   --> $DIR/borrowck-pat-ref-mut-and-ref.rs:109:66
@@ -323,6 +324,7 @@ LL |         ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false
    |                                                                  ^ move occurs because `a` has type `&mut Result<U, U>`, which does not implement the `Copy` trait
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
   --> $DIR/borrowck-pat-ref-mut-and-ref.rs:117:9
diff --git a/tests/ui/pattern/patkind-litrange-no-expr.stderr b/tests/ui/pattern/patkind-litrange-no-expr.stderr
index eb1ee7e4567..45a26148940 100644
--- a/tests/ui/pattern/patkind-litrange-no-expr.stderr
+++ b/tests/ui/pattern/patkind-litrange-no-expr.stderr
@@ -9,6 +9,8 @@ error: arbitrary expressions aren't allowed in patterns
    |
 LL |     Arith = 1 + 1,
    |             ^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/pattern/slice-patterns-irrefutable.stderr b/tests/ui/pattern/slice-patterns-irrefutable.stderr
index fac99534f3e..e98ee28d686 100644
--- a/tests/ui/pattern/slice-patterns-irrefutable.stderr
+++ b/tests/ui/pattern/slice-patterns-irrefutable.stderr
@@ -3,6 +3,9 @@ error[E0282]: type annotations needed for `[_; 3]`
    |
 LL |     let b;
    |         ^
+LL |
+LL |     [a, b] = Default::default();
+   |      - type must be known at this point
    |
 help: consider giving `b` an explicit type, where the placeholders `_` are specified
    |
diff --git a/tests/ui/privacy/effective_visibilities.stderr b/tests/ui/privacy/effective_visibilities.stderr
index f74f812e1a0..41d63532dea 100644
--- a/tests/ui/privacy/effective_visibilities.stderr
+++ b/tests/ui/privacy/effective_visibilities.stderr
@@ -45,6 +45,8 @@ error: not in the table
    |
 LL |         struct PrivStruct;
    |         ^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: Direct: pub(crate), Reexported: pub, Reachable: pub, ReachableThroughImplTrait: pub
   --> $DIR/effective_visibilities.rs:25:9
@@ -81,6 +83,8 @@ error: Direct: pub(crate), Reexported: pub, Reachable: pub, ReachableThroughImpl
    |
 LL |             A(
    |             ^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: Direct: pub(crate), Reexported: pub, Reachable: pub, ReachableThroughImplTrait: pub
   --> $DIR/effective_visibilities.rs:38:17
diff --git a/tests/ui/privacy/effective_visibilities_full_priv.stderr b/tests/ui/privacy/effective_visibilities_full_priv.stderr
index 29d82e2ee01..0577be1475f 100644
--- a/tests/ui/privacy/effective_visibilities_full_priv.stderr
+++ b/tests/ui/privacy/effective_visibilities_full_priv.stderr
@@ -9,6 +9,8 @@ error: not in the table
    |
 LL |     struct Priv;
    |     ^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: Direct: pub(crate), Reexported: pub(crate), Reachable: pub(crate), ReachableThroughImplTrait: pub(crate)
   --> $DIR/effective_visibilities_full_priv.rs:13:5
diff --git a/tests/ui/privacy/privacy1.stderr b/tests/ui/privacy/privacy1.stderr
index ca8f242e0be..a3552e146a6 100644
--- a/tests/ui/privacy/privacy1.stderr
+++ b/tests/ui/privacy/privacy1.stderr
@@ -21,6 +21,7 @@ note: the module `baz` is defined here
    |
 LL |     mod baz {
    |     ^^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0603]: module `baz` is private
   --> $DIR/privacy1.rs:141:18
diff --git a/tests/ui/proc-macro/issue-37788.stderr b/tests/ui/proc-macro/issue-37788.stderr
index e437bb90b1d..0a116d6f80d 100644
--- a/tests/ui/proc-macro/issue-37788.stderr
+++ b/tests/ui/proc-macro/issue-37788.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-37788.rs:8:5
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 LL |     // Test that constructing the `visible_parent_map` (in `cstore_impl.rs`) does not ICE.
 LL |     std::cell::Cell::new(0)
    |     ^^^^^^^^^^^^^^^^^^^^^^^- help: consider using a semicolon here: `;`
diff --git a/tests/ui/proc-macro/issue-75930-derive-cfg.stderr b/tests/ui/proc-macro/issue-75930-derive-cfg.stderr
index 6d1efb0dc28..f3f470676e4 100644
--- a/tests/ui/proc-macro/issue-75930-derive-cfg.stderr
+++ b/tests/ui/proc-macro/issue-75930-derive-cfg.stderr
@@ -22,6 +22,7 @@ LL | #[derive(Print)]
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 2 warnings emitted
 
diff --git a/tests/ui/proc-macro/macro-namespace-reserved-2.stderr b/tests/ui/proc-macro/macro-namespace-reserved-2.stderr
index b9effe7cf21..0471124061e 100644
--- a/tests/ui/proc-macro/macro-namespace-reserved-2.stderr
+++ b/tests/ui/proc-macro/macro-namespace-reserved-2.stderr
@@ -143,6 +143,7 @@ LL | #[derive(my_macro)]
    |          ^^^^^^^^
    |
    = note: `my_macro` is in scope, but it is a function-like macro
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 20 previous errors
 
diff --git a/tests/ui/proc-macro/pretty-print-hack-show.local.stderr b/tests/ui/proc-macro/pretty-print-hack-show.local.stderr
index 873054927c9..118882f73a3 100644
--- a/tests/ui/proc-macro/pretty-print-hack-show.local.stderr
+++ b/tests/ui/proc-macro/pretty-print-hack-show.local.stderr
@@ -18,6 +18,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/allsorts-rental-0.5.6/src/lib.rs:4:6
@@ -28,6 +29,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/allsorts-rental-0.5.6/src/lib.rs:4:6
@@ -38,6 +40,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/rental-0.5.5/src/lib.rs:4:6
@@ -58,6 +61,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/rental-0.5.5/src/lib.rs:4:6
@@ -68,6 +72,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/rental-0.5.5/src/lib.rs:4:6
@@ -78,6 +83,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/proc-macro/pretty-print-hack-show.remapped.stderr b/tests/ui/proc-macro/pretty-print-hack-show.remapped.stderr
index 873054927c9..118882f73a3 100644
--- a/tests/ui/proc-macro/pretty-print-hack-show.remapped.stderr
+++ b/tests/ui/proc-macro/pretty-print-hack-show.remapped.stderr
@@ -18,6 +18,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/allsorts-rental-0.5.6/src/lib.rs:4:6
@@ -28,6 +29,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/allsorts-rental-0.5.6/src/lib.rs:4:6
@@ -38,6 +40,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/rental-0.5.5/src/lib.rs:4:6
@@ -58,6 +61,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/rental-0.5.5/src/lib.rs:4:6
@@ -68,6 +72,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: using an old version of `rental`
   --> $DIR/pretty-print-hack/rental-0.5.5/src/lib.rs:4:6
@@ -78,6 +83,7 @@ LL | enum ProceduralMasqueradeDummyType {
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
    = note: older versions of the `rental` crate will stop compiling in future versions of Rust; please update to `rental` v0.5.6, or switch to one of the `rental` alternatives
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/proc-macro/resolve-error.stderr b/tests/ui/proc-macro/resolve-error.stderr
index 3c3f24d0ff2..e7639f474c7 100644
--- a/tests/ui/proc-macro/resolve-error.stderr
+++ b/tests/ui/proc-macro/resolve-error.stderr
@@ -44,6 +44,8 @@ error: cannot find derive macro `attr_proc_macra` in this scope
    |
 LL | #[derive(attr_proc_macra)]
    |          ^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot find derive macro `Dlona` in this scope
   --> $DIR/resolve-error.rs:40:10
@@ -66,6 +68,8 @@ LL | #[derive(Dlona)]
    |
 LL | pub fn derive_clonea(input: TokenStream) -> TokenStream {
    | ------------------------------------------------------- similarly named derive macro `Clona` defined here
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot find derive macro `Dlone` in this scope
   --> $DIR/resolve-error.rs:35:10
@@ -84,6 +88,8 @@ LL | #[derive(Dlone)]
   --> $SRC_DIR/core/src/clone.rs:LL:COL
    |
    = note: similarly named derive macro `Clone` defined here
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot find attribute `FooWithLongNan` in this scope
   --> $DIR/resolve-error.rs:32:3
@@ -123,6 +129,8 @@ LL | #[derive(FooWithLongNan)]
    |
 LL | pub fn derive_foo(input: TokenStream) -> TokenStream {
    | ---------------------------------------------------- similarly named derive macro `FooWithLongName` defined here
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 14 previous errors
 
diff --git a/tests/ui/proc-macro/resolved-located-at.stderr b/tests/ui/proc-macro/resolved-located-at.stderr
index 0b4dbcba682..a4f838521fd 100644
--- a/tests/ui/proc-macro/resolved-located-at.stderr
+++ b/tests/ui/proc-macro/resolved-located-at.stderr
@@ -10,7 +10,7 @@ error[E0308]: mismatched types
   --> $DIR/resolved-located-at.rs:7:27
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 LL |     resolve_located_at!(a b)
    |                           ^ expected `()`, found `S`
    |
diff --git a/tests/ui/proc-macro/span-preservation.stderr b/tests/ui/proc-macro/span-preservation.stderr
index 8c15cb9de98..3ad9c539f84 100644
--- a/tests/ui/proc-macro/span-preservation.stderr
+++ b/tests/ui/proc-macro/span-preservation.stderr
@@ -38,7 +38,7 @@ error[E0308]: mismatched types
   --> $DIR/span-preservation.rs:39:5
    |
 LL | extern "C" fn bar() {
-   |                     - help: try adding a return type: `-> i32`
+   |                    - help: try adding a return type: `-> i32`
 LL |     0
    |     ^ expected `()`, found integer
 
@@ -46,7 +46,7 @@ error[E0308]: mismatched types
   --> $DIR/span-preservation.rs:44:5
    |
 LL | extern "C" fn baz() {
-   |                     - help: try adding a return type: `-> i32`
+   |                    - help: try adding a return type: `-> i32`
 LL |     0
    |     ^ expected `()`, found integer
 
@@ -54,7 +54,7 @@ error[E0308]: mismatched types
   --> $DIR/span-preservation.rs:49:5
    |
 LL | extern "Rust" fn rust_abi() {
-   |                             - help: try adding a return type: `-> i32`
+   |                            - help: try adding a return type: `-> i32`
 LL |     0
    |     ^ expected `()`, found integer
 
@@ -62,7 +62,7 @@ error[E0308]: mismatched types
   --> $DIR/span-preservation.rs:54:5
    |
 LL | extern "\x43" fn c_abi_escaped() {
-   |                                  - help: try adding a return type: `-> i32`
+   |                                 - help: try adding a return type: `-> i32`
 LL |     0
    |     ^ expected `()`, found integer
 
diff --git a/tests/ui/recursion_limit/empty.stderr b/tests/ui/recursion_limit/empty.stderr
index cb5c0c35a5e..2f730677507 100644
--- a/tests/ui/recursion_limit/empty.stderr
+++ b/tests/ui/recursion_limit/empty.stderr
@@ -13,6 +13,8 @@ LL | #![recursion_limit = ""]
    | ^^^^^^^^^^^^^^^^^^^^^--^
    |                      |
    |                      `limit` must be a non-negative integer
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/recursion_limit/invalid_digit.stderr b/tests/ui/recursion_limit/invalid_digit.stderr
index 4dc93ad5f67..4fda3039032 100644
--- a/tests/ui/recursion_limit/invalid_digit.stderr
+++ b/tests/ui/recursion_limit/invalid_digit.stderr
@@ -13,6 +13,8 @@ LL | #![recursion_limit = "-100"]
    | ^^^^^^^^^^^^^^^^^^^^^------^
    |                      |
    |                      not a valid integer
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/recursion_limit/overflow.stderr b/tests/ui/recursion_limit/overflow.stderr
index 2f622d28b45..6057177deb2 100644
--- a/tests/ui/recursion_limit/overflow.stderr
+++ b/tests/ui/recursion_limit/overflow.stderr
@@ -13,6 +13,8 @@ LL | #![recursion_limit = "999999999999999999999999"]
    | ^^^^^^^^^^^^^^^^^^^^^--------------------------^
    |                      |
    |                      `limit` is too large
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/regions/regions-close-object-into-object-4.stderr b/tests/ui/regions/regions-close-object-into-object-4.stderr
index 7a9f1ab0001..3ff7f891c66 100644
--- a/tests/ui/regions/regions-close-object-into-object-4.stderr
+++ b/tests/ui/regions/regions-close-object-into-object-4.stderr
@@ -26,6 +26,7 @@ error[E0310]: the parameter type `U` may not live long enough
 LL |     Box::new(B(&*v)) as Box<dyn X>
    |     ^^^^^^^^^^^^^^^^ ...so that the type `U` will meet its required lifetime bounds
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: consider adding an explicit lifetime bound...
    |
 LL | fn i<'a, T, U: 'static>(v: Box<dyn A<U>+'a>) -> Box<dyn X + 'static> {
diff --git a/tests/ui/regions/regions-close-object-into-object-5.stderr b/tests/ui/regions/regions-close-object-into-object-5.stderr
index 311e8868c09..88c13483263 100644
--- a/tests/ui/regions/regions-close-object-into-object-5.stderr
+++ b/tests/ui/regions/regions-close-object-into-object-5.stderr
@@ -26,6 +26,7 @@ error[E0310]: the parameter type `T` may not live long enough
 LL |     Box::new(B(&*v)) as Box<dyn X>
    |     ^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
    |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: consider adding an explicit lifetime bound...
    |
 LL | fn f<'a, T: 'static, U>(v: Box<A<T> + 'static>) -> Box<X + 'static> {
diff --git a/tests/ui/repr/repr-align-assign.stderr b/tests/ui/repr/repr-align-assign.stderr
index b878ae0d173..3606d02210b 100644
--- a/tests/ui/repr/repr-align-assign.stderr
+++ b/tests/ui/repr/repr-align-assign.stderr
@@ -15,12 +15,16 @@ error[E0693]: incorrect `repr(align)` attribute format
    |
 LL | #[repr(align=8)]
    |        ^^^^^^^ help: use parentheses instead: `align(8)`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0693]: incorrect `repr(align)` attribute format
   --> $DIR/repr-align-assign.rs:9:8
    |
 LL | #[repr(align="8")]
    |        ^^^^^^^^^ help: use parentheses instead: `align(8)`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/repr/repr-align.stderr b/tests/ui/repr/repr-align.stderr
index 900a811bb8a..84d33a08a6f 100644
--- a/tests/ui/repr/repr-align.stderr
+++ b/tests/ui/repr/repr-align.stderr
@@ -39,36 +39,48 @@ error[E0589]: invalid `repr(align)` attribute: not an unsuffixed integer
    |
 LL | #[repr(align(16.0))]
    |        ^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0589]: invalid `repr(align)` attribute: not a power of two
   --> $DIR/repr-align.rs:7:8
    |
 LL | #[repr(align(15))]
    |        ^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0589]: invalid `repr(align)` attribute: larger than 2^29
   --> $DIR/repr-align.rs:11:8
    |
 LL | #[repr(align(4294967296))]
    |        ^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0589]: invalid `repr(align)` attribute: not an unsuffixed integer
   --> $DIR/repr-align.rs:18:8
    |
 LL | #[repr(align(16.0))]
    |        ^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0589]: invalid `repr(align)` attribute: not a power of two
   --> $DIR/repr-align.rs:22:8
    |
 LL | #[repr(align(15))]
    |        ^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0589]: invalid `repr(align)` attribute: larger than 2^29
   --> $DIR/repr-align.rs:26:8
    |
 LL | #[repr(align(4294967296))]
    |        ^^^^^^^^^^^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 12 previous errors
 
diff --git a/tests/ui/resolve/resolve-inconsistent-names.stderr b/tests/ui/resolve/resolve-inconsistent-names.stderr
index 42b7281d7b0..d6240fb8f87 100644
--- a/tests/ui/resolve/resolve-inconsistent-names.stderr
+++ b/tests/ui/resolve/resolve-inconsistent-names.stderr
@@ -1,11 +1,3 @@
-error[E0408]: variable `a` is not bound in all patterns
-  --> $DIR/resolve-inconsistent-names.rs:13:12
-   |
-LL |        a | b => {}
-   |        -   ^ pattern doesn't bind `a`
-   |        |
-   |        variable not in all patterns
-
 error[E0408]: variable `b` is not bound in all patterns
   --> $DIR/resolve-inconsistent-names.rs:13:8
    |
@@ -14,6 +6,14 @@ LL |        a | b => {}
    |        |
    |        pattern doesn't bind `b`
 
+error[E0408]: variable `a` is not bound in all patterns
+  --> $DIR/resolve-inconsistent-names.rs:13:12
+   |
+LL |        a | b => {}
+   |        -   ^ pattern doesn't bind `a`
+   |        |
+   |        variable not in all patterns
+
 error[E0408]: variable `c` is not bound in all patterns
   --> $DIR/resolve-inconsistent-names.rs:19:9
    |
@@ -54,6 +54,19 @@ LL |         (A, B) | (ref B, c) | (c, A) => ()
    |             |
    |             first binding
 
+error[E0408]: variable `Const2` is not bound in all patterns
+  --> $DIR/resolve-inconsistent-names.rs:31:9
+   |
+LL |         (CONST1, _) | (_, Const2) => ()
+   |         ^^^^^^^^^^^       ------ variable not in all patterns
+   |         |
+   |         pattern doesn't bind `Const2`
+   |
+help: if you meant to match on constant `m::Const2`, use the full path in the pattern
+   |
+LL |         (CONST1, _) | (_, m::Const2) => ()
+   |                           ~~~~~~~~~
+
 error[E0408]: variable `CONST1` is not bound in all patterns
   --> $DIR/resolve-inconsistent-names.rs:31:23
    |
@@ -68,19 +81,6 @@ note: you might have meant to match on constant `m::CONST1`, which exists but is
 LL |     const CONST1: usize = 10;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^ not accessible
 
-error[E0408]: variable `Const2` is not bound in all patterns
-  --> $DIR/resolve-inconsistent-names.rs:31:9
-   |
-LL |         (CONST1, _) | (_, Const2) => ()
-   |         ^^^^^^^^^^^       ------ variable not in all patterns
-   |         |
-   |         pattern doesn't bind `Const2`
-   |
-help: if you meant to match on constant `m::Const2`, use the full path in the pattern
-   |
-LL |         (CONST1, _) | (_, m::Const2) => ()
-   |                           ~~~~~~~~~
-
 error[E0308]: mismatched types
   --> $DIR/resolve-inconsistent-names.rs:19:19
    |
diff --git a/tests/ui/return/return-struct.stderr b/tests/ui/return/return-struct.stderr
index e6c0363e363..282e6498ebe 100644
--- a/tests/ui/return/return-struct.stderr
+++ b/tests/ui/return/return-struct.stderr
@@ -17,7 +17,7 @@ error[E0308]: mismatched types
   --> $DIR/return-struct.rs:15:5
    |
 LL | fn bar() {
-   |          - help: try adding a return type: `-> Age`
+   |         - help: try adding a return type: `-> Age`
 LL |     let mut age = 29;
 LL |     Age::Years(age, 55)
    |     ^^^^^^^^^^^^^^^^^^^ expected `()`, found `Age`
@@ -26,7 +26,7 @@ error[E0308]: mismatched types
   --> $DIR/return-struct.rs:20:5
    |
 LL | fn baz() {
-   |          - help: try adding a return type: `-> S`
+   |         - help: try adding a return type: `-> S`
 LL |     S
    |     ^ expected `()`, found `S`
 
diff --git a/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr b/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr
index d183eaaa623..5f8c5dbe619 100644
--- a/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr
+++ b/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr
@@ -15,6 +15,7 @@ LL |     f: &id,
    |
    = note: expected trait `for<'a, 'b> Fn<(&'a Foo<'b>,)>`
               found trait `Fn<(&Foo<'_>,)>`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: implementation of `FnOnce` is not general enough
   --> $DIR/rfc1623-2.rs:28:8
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/effects/const-bound-on-not-const-associated-fn.rs b/tests/ui/rfcs/rfc-2632-const-trait-impl/effects/const-bound-on-not-const-associated-fn.rs
new file mode 100644
index 00000000000..1e22ddcea8d
--- /dev/null
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/effects/const-bound-on-not-const-associated-fn.rs
@@ -0,0 +1,28 @@
+#![feature(const_trait_impl, effects)]
+
+#[const_trait]
+trait MyTrait {
+    fn do_something(&self);
+}
+
+trait OtherTrait {
+    fn do_something_else() where Self: ~const MyTrait;
+    //~^ ERROR `~const` is not allowed here
+}
+
+struct MyStruct<T>(T);
+
+impl const MyTrait for u32 {
+    fn do_something(&self) {}
+}
+
+impl<T> MyStruct<T> {
+    pub fn foo(&self) where T: ~const MyTrait {
+        //~^ ERROR `~const` is not allowed here
+        self.0.do_something();
+    }
+}
+
+fn main() {
+    MyStruct(0u32).foo();
+}
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/effects/const-bound-on-not-const-associated-fn.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/effects/const-bound-on-not-const-associated-fn.stderr
new file mode 100644
index 00000000000..9210f642706
--- /dev/null
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/effects/const-bound-on-not-const-associated-fn.stderr
@@ -0,0 +1,26 @@
+error: `~const` is not allowed here
+  --> $DIR/const-bound-on-not-const-associated-fn.rs:9:40
+   |
+LL |     fn do_something_else() where Self: ~const MyTrait;
+   |                                        ^^^^^^^^^^^^^^
+   |
+note: this function is not `const`, so it cannot have `~const` trait bounds
+  --> $DIR/const-bound-on-not-const-associated-fn.rs:9:8
+   |
+LL |     fn do_something_else() where Self: ~const MyTrait;
+   |        ^^^^^^^^^^^^^^^^^
+
+error: `~const` is not allowed here
+  --> $DIR/const-bound-on-not-const-associated-fn.rs:20:32
+   |
+LL |     pub fn foo(&self) where T: ~const MyTrait {
+   |                                ^^^^^^^^^^^^^^
+   |
+note: this function is not `const`, so it cannot have `~const` trait bounds
+  --> $DIR/const-bound-on-not-const-associated-fn.rs:20:12
+   |
+LL |     pub fn foo(&self) where T: ~const MyTrait {
+   |            ^^^
+
+error: aborting due to 2 previous errors
+
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/issue-102156.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/issue-102156.stderr
index 8bf00eaff1f..e8ae7e4e36c 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/issue-102156.stderr
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/issue-102156.stderr
@@ -13,6 +13,7 @@ LL | use core::convert::{From, TryFrom};
    |     ^^^^ maybe a missing crate `core`?
    |
    = help: consider adding `extern crate core` to use the `core` crate
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.nn.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.nn.stderr
index 97f346e8c1d..b60399c57dc 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.nn.stderr
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.nn.stderr
@@ -9,6 +9,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL | trait Bar: ~const Foo {}
    |                   ^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.ny.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.ny.stderr
index 97f346e8c1d..b60399c57dc 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.ny.stderr
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-2.ny.stderr
@@ -9,6 +9,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL | trait Bar: ~const Foo {}
    |                   ^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.nn.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.nn.stderr
index 2897eabb081..eb12a236d8c 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.nn.stderr
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.nn.stderr
@@ -9,6 +9,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL | trait Bar: ~const Foo {}
    |                   ^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: ~const can only be applied to `#[const_trait]` traits
   --> $DIR/super-traits-fail-3.rs:17:24
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.ny.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.ny.stderr
index 9839a4f2480..cd0ee73277d 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.ny.stderr
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.ny.stderr
@@ -9,6 +9,8 @@ error: ~const can only be applied to `#[const_trait]` traits
    |
 LL | trait Bar: ~const Foo {}
    |                   ^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs b/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs
index 89d74cecfdb..4b720b534a4 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs
@@ -7,7 +7,8 @@ struct Foo<const N: usize>;
 
 impl<const N: usize> Foo<N> {
     fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
-        //~^ ERROR mismatched types
+        //~^ ERROR `~const` is not allowed here
+        //~| ERROR mismatched types
         Foo
     }
 }
@@ -30,7 +31,7 @@ fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
 }
 
 fn main() {
-   let foo = Foo::<0>;
-   let foo = bar::<(), _>(foo);
-   let _foo = bar::<(), _>(foo);
+    let foo = Foo::<0>;
+    let foo = bar::<(), _>(foo);
+    let _foo = bar::<(), _>(foo);
 }
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.stderr
index ec5d21d33c6..be7a83dc184 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.stderr
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.stderr
@@ -1,17 +1,29 @@
 error: `~const` is not allowed here
-  --> $DIR/tilde-const-and-const-params.rs:26:11
+  --> $DIR/tilde-const-and-const-params.rs:9:15
+   |
+LL |     fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
+   |               ^^^^^^^^^^^^
+   |
+note: this function is not `const`, so it cannot have `~const` trait bounds
+  --> $DIR/tilde-const-and-const-params.rs:9:8
+   |
+LL |     fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
+   |        ^^^
+
+error: `~const` is not allowed here
+  --> $DIR/tilde-const-and-const-params.rs:27:11
    |
 LL | fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
    |           ^^^^^^^^^^^^
    |
 note: this function is not `const`, so it cannot have `~const` trait bounds
-  --> $DIR/tilde-const-and-const-params.rs:26:4
+  --> $DIR/tilde-const-and-const-params.rs:27:4
    |
 LL | fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
    |    ^^^
 
 error[E0308]: mismatched types
-  --> $DIR/tilde-const-and-const-params.rs:26:61
+  --> $DIR/tilde-const-and-const-params.rs:27:61
    |
 LL | fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
    |                                                             ^^^^^^^^^ expected `false`, found `true`
@@ -28,6 +40,6 @@ LL |     fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
    = note: expected constant `false`
               found constant `true`
 
-error: aborting due to 3 previous errors
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0308`.
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.rs b/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.rs
index 85ca5fc9048..11f353f3f8a 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.rs
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.rs
@@ -6,7 +6,9 @@ trait Bar {}
 trait Foo {
     fn a();
     fn b() where Self: ~const Bar;
+    //~^ ERROR `~const` is not allowed here
     fn c<T: ~const Bar>();
+    //~^ ERROR `~const` is not allowed here
 }
 
 fn test1<T: Foo>() {
diff --git a/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.stderr b/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.stderr
index 255878e1775..3d6fedbabbf 100644
--- a/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.stderr
+++ b/tests/ui/rfcs/rfc-2632-const-trait-impl/trait-where-clause.stderr
@@ -1,5 +1,29 @@
+error: `~const` is not allowed here
+  --> $DIR/trait-where-clause.rs:8:24
+   |
+LL |     fn b() where Self: ~const Bar;
+   |                        ^^^^^^^^^^
+   |
+note: this function is not `const`, so it cannot have `~const` trait bounds
+  --> $DIR/trait-where-clause.rs:8:8
+   |
+LL |     fn b() where Self: ~const Bar;
+   |        ^
+
+error: `~const` is not allowed here
+  --> $DIR/trait-where-clause.rs:10:13
+   |
+LL |     fn c<T: ~const Bar>();
+   |             ^^^^^^^^^^
+   |
+note: this function is not `const`, so it cannot have `~const` trait bounds
+  --> $DIR/trait-where-clause.rs:10:8
+   |
+LL |     fn c<T: ~const Bar>();
+   |        ^
+
 error[E0277]: the trait bound `T: Bar` is not satisfied
-  --> $DIR/trait-where-clause.rs:14:5
+  --> $DIR/trait-where-clause.rs:16:5
    |
 LL |     T::b();
    |     ^ the trait `Bar` is not implemented for `T`
@@ -15,13 +39,13 @@ LL | fn test1<T: Foo + Bar>() {
    |                 +++++
 
 error[E0277]: the trait bound `T: Bar` is not satisfied
-  --> $DIR/trait-where-clause.rs:16:12
+  --> $DIR/trait-where-clause.rs:18:12
    |
 LL |     T::c::<T>();
    |            ^ the trait `Bar` is not implemented for `T`
    |
 note: required by a bound in `Foo::c`
-  --> $DIR/trait-where-clause.rs:9:13
+  --> $DIR/trait-where-clause.rs:10:13
    |
 LL |     fn c<T: ~const Bar>();
    |             ^^^^^^^^^^ required by this bound in `Foo::c`
@@ -30,6 +54,6 @@ help: consider further restricting this bound
 LL | fn test1<T: Foo + Bar>() {
    |                 +++++
 
-error: aborting due to 2 previous errors
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/rust-2018/edition-lint-fully-qualified-paths.stderr b/tests/ui/rust-2018/edition-lint-fully-qualified-paths.stderr
index 497ee440dfd..c0a322edcd6 100644
--- a/tests/ui/rust-2018/edition-lint-fully-qualified-paths.stderr
+++ b/tests/ui/rust-2018/edition-lint-fully-qualified-paths.stderr
@@ -20,6 +20,7 @@ LL |     let _: <foo::Baz as ::foo::Foo>::Bar = ();
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
    = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: absolute paths must start with `self`, `super`, `crate`, or an external crate name in the 2018 edition
   --> $DIR/edition-lint-fully-qualified-paths.rs:25:13
diff --git a/tests/ui/rust-2018/edition-lint-nested-empty-paths.stderr b/tests/ui/rust-2018/edition-lint-nested-empty-paths.stderr
index 8769cbb35b0..041572be844 100644
--- a/tests/ui/rust-2018/edition-lint-nested-empty-paths.stderr
+++ b/tests/ui/rust-2018/edition-lint-nested-empty-paths.stderr
@@ -29,6 +29,7 @@ LL | use foo::{bar::{XX, baz::{}}};
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
    = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: absolute paths must start with `self`, `super`, `crate`, or an external crate name in the 2018 edition
   --> $DIR/edition-lint-nested-empty-paths.rs:27:5
@@ -47,6 +48,7 @@ LL | use foo::{bar::{baz::{}, baz1::{}}};
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
    = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 5 previous errors
 
diff --git a/tests/ui/rust-2018/edition-lint-nested-paths.stderr b/tests/ui/rust-2018/edition-lint-nested-paths.stderr
index 354a6fe3252..4a70bb7e5c8 100644
--- a/tests/ui/rust-2018/edition-lint-nested-paths.stderr
+++ b/tests/ui/rust-2018/edition-lint-nested-paths.stderr
@@ -20,6 +20,7 @@ LL | use foo::{a, b};
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
    = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: absolute paths must start with `self`, `super`, `crate`, or an external crate name in the 2018 edition
   --> $DIR/edition-lint-nested-paths.rs:23:13
@@ -38,6 +39,7 @@ LL |         use foo::{self as x, c};
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
    = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/rust-2018/edition-lint-paths.stderr b/tests/ui/rust-2018/edition-lint-paths.stderr
index 42652be9401..fde17338d98 100644
--- a/tests/ui/rust-2018/edition-lint-paths.stderr
+++ b/tests/ui/rust-2018/edition-lint-paths.stderr
@@ -38,6 +38,7 @@ LL |     use {main, Bar as SomethingElse};
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
    = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: absolute paths must start with `self`, `super`, `crate`, or an external crate name in the 2018 edition
   --> $DIR/edition-lint-paths.rs:25:9
@@ -47,6 +48,7 @@ LL |     use {main, Bar as SomethingElse};
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
    = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: absolute paths must start with `self`, `super`, `crate`, or an external crate name in the 2018 edition
   --> $DIR/edition-lint-paths.rs:40:5
diff --git a/tests/ui/rust-2018/uniform-paths/cross-crate.stderr b/tests/ui/rust-2018/uniform-paths/cross-crate.stderr
index 45f77a0c9fe..8682c56d2a5 100644
--- a/tests/ui/rust-2018/uniform-paths/cross-crate.stderr
+++ b/tests/ui/rust-2018/uniform-paths/cross-crate.stderr
@@ -33,6 +33,7 @@ note: the tool module imported here
    |
 LL | use cross_crate::*;
    |     ^^^^^^^^^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/rust-2018/uniform-paths/prelude-fail-2.stderr b/tests/ui/rust-2018/uniform-paths/prelude-fail-2.stderr
index 908bb498586..3dacb796911 100644
--- a/tests/ui/rust-2018/uniform-paths/prelude-fail-2.stderr
+++ b/tests/ui/rust-2018/uniform-paths/prelude-fail-2.stderr
@@ -51,6 +51,7 @@ note: the tool module imported here
    |
 LL | use rustfmt as imported_rustfmt;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot use a tool module through an import
   --> $DIR/prelude-fail-2.rs:19:13
@@ -63,6 +64,7 @@ note: the tool module imported here
    |
 LL |     pub use rustfmt as imported_rustfmt;
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.aarch64.stderr b/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.aarch64.stderr
index 8328178e8d0..1006c3bc17e 100644
--- a/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.aarch64.stderr
+++ b/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.aarch64.stderr
@@ -3,6 +3,8 @@ error: cfi sanitizer is not supported for this target
 error: `-Zsanitizer=cfi` is incompatible with `-Zsanitizer=kcfi`
 
 error: `-Zsanitizer=cfi` is incompatible with `-Zsanitizer=kcfi`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.x86_64.stderr b/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.x86_64.stderr
index 8328178e8d0..1006c3bc17e 100644
--- a/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.x86_64.stderr
+++ b/tests/ui/sanitize/sanitizer-cfi-is-incompatible-with-saniziter-kcfi.x86_64.stderr
@@ -3,6 +3,8 @@ error: cfi sanitizer is not supported for this target
 error: `-Zsanitizer=cfi` is incompatible with `-Zsanitizer=kcfi`
 
 error: `-Zsanitizer=cfi` is incompatible with `-Zsanitizer=kcfi`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/self/arbitrary_self_types_needing_mut_pin.fixed b/tests/ui/self/arbitrary_self_types_needing_mut_pin.fixed
index ccd65ff4091..a400a1672a4 100644
--- a/tests/ui/self/arbitrary_self_types_needing_mut_pin.fixed
+++ b/tests/ui/self/arbitrary_self_types_needing_mut_pin.fixed
@@ -8,5 +8,6 @@ impl S {
 }
 
 fn main() {
-    Pin::new(&mut S).x(); //~ ERROR no method named `x` found
+    let mut pinned = std::pin::pin!(S);
+    pinned.as_mut().x(); //~ ERROR no method named `x` found
 }
diff --git a/tests/ui/self/arbitrary_self_types_needing_mut_pin.stderr b/tests/ui/self/arbitrary_self_types_needing_mut_pin.stderr
index f34ce4dce49..5dcb5861120 100644
--- a/tests/ui/self/arbitrary_self_types_needing_mut_pin.stderr
+++ b/tests/ui/self/arbitrary_self_types_needing_mut_pin.stderr
@@ -4,16 +4,14 @@ error[E0599]: no method named `x` found for struct `S` in the current scope
 LL | struct S;
    | -------- method `x` not found for this struct
 ...
-LL |     fn x(self: Pin<&mut Self>) {
-   |        - the method is available for `Pin<&mut S>` here
-...
 LL |     S.x();
    |       ^ method not found in `S`
    |
-help: consider wrapping the receiver expression with the appropriate type
+help: consider pinning the expression
+   |
+LL ~     let mut pinned = std::pin::pin!(S);
+LL ~     pinned.as_mut().x();
    |
-LL |     Pin::new(&mut S).x();
-   |     +++++++++++++  +
 
 error: aborting due to previous error
 
diff --git a/tests/ui/span/issue-39698.stderr b/tests/ui/span/issue-39698.stderr
index 81211b20a01..50008083211 100644
--- a/tests/ui/span/issue-39698.stderr
+++ b/tests/ui/span/issue-39698.stderr
@@ -1,3 +1,13 @@
+error[E0408]: variable `b` is not bound in all patterns
+  --> $DIR/issue-39698.rs:10:9
+   |
+LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}", a); }
+   |         ^^^^^^^^^^^            -    ^^^^^^^^   ^^^^^^^^ pattern doesn't bind `b`
+   |         |                      |    |
+   |         |                      |    pattern doesn't bind `b`
+   |         |                      variable not in all patterns
+   |         pattern doesn't bind `b`
+
 error[E0408]: variable `c` is not bound in all patterns
   --> $DIR/issue-39698.rs:10:9
    |
@@ -8,16 +18,6 @@ LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}
    |         |             pattern doesn't bind `c`
    |         pattern doesn't bind `c`
 
-error[E0408]: variable `d` is not bound in all patterns
-  --> $DIR/issue-39698.rs:10:37
-   |
-LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}", a); }
-   |                  -          -       ^^^^^^^^   ^^^^^^^^ pattern doesn't bind `d`
-   |                  |          |       |
-   |                  |          |       pattern doesn't bind `d`
-   |                  |          variable not in all patterns
-   |                  variable not in all patterns
-
 error[E0408]: variable `a` is not bound in all patterns
   --> $DIR/issue-39698.rs:10:23
    |
@@ -28,15 +28,15 @@ LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}
    |               |       pattern doesn't bind `a`
    |               variable not in all patterns
 
-error[E0408]: variable `b` is not bound in all patterns
-  --> $DIR/issue-39698.rs:10:9
+error[E0408]: variable `d` is not bound in all patterns
+  --> $DIR/issue-39698.rs:10:37
    |
 LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}", a); }
-   |         ^^^^^^^^^^^            -    ^^^^^^^^   ^^^^^^^^ pattern doesn't bind `b`
-   |         |                      |    |
-   |         |                      |    pattern doesn't bind `b`
-   |         |                      variable not in all patterns
-   |         pattern doesn't bind `b`
+   |                  -          -       ^^^^^^^^   ^^^^^^^^ pattern doesn't bind `d`
+   |                  |          |       |
+   |                  |          |       pattern doesn't bind `d`
+   |                  |          variable not in all patterns
+   |                  variable not in all patterns
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/str/str-idx.stderr b/tests/ui/str/str-idx.stderr
index cb1a6fcacfc..e8bbb8058fa 100644
--- a/tests/ui/str/str-idx.stderr
+++ b/tests/ui/str/str-idx.stderr
@@ -7,7 +7,8 @@ LL |     let _: u8 = s[4];
    = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
    = note: you can use `.chars().nth()` or `.bytes().nth()`
            for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[_]>` is implemented for `usize`
+   = help: for that trait implementation, expected `[_]`, found `str`
    = note: required for `str` to implement `Index<{integer}>`
 
 error[E0277]: the type `str` cannot be indexed by `{integer}`
@@ -21,7 +22,8 @@ LL |     let _ = s.get(4);
    = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
    = note: you can use `.chars().nth()` or `.bytes().nth()`
            for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[_]>` is implemented for `usize`
+   = help: for that trait implementation, expected `[_]`, found `str`
 note: required by a bound in `core::str::<impl str>::get`
   --> $SRC_DIR/core/src/str/mod.rs:LL:COL
 
@@ -36,7 +38,8 @@ LL |     let _ = s.get_unchecked(4);
    = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
    = note: you can use `.chars().nth()` or `.bytes().nth()`
            for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[_]>` is implemented for `usize`
+   = help: for that trait implementation, expected `[_]`, found `str`
 note: required by a bound in `core::str::<impl str>::get_unchecked`
   --> $SRC_DIR/core/src/str/mod.rs:LL:COL
 
diff --git a/tests/ui/str/str-mut-idx.stderr b/tests/ui/str/str-mut-idx.stderr
index ca4b86ba306..e6835bb54fb 100644
--- a/tests/ui/str/str-mut-idx.stderr
+++ b/tests/ui/str/str-mut-idx.stderr
@@ -31,7 +31,8 @@ LL |     s[1usize] = bot();
    |       ^^^^^^ string indices are ranges of `usize`
    |
    = help: the trait `SliceIndex<str>` is not implemented for `usize`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[_]>` is implemented for `usize`
+   = help: for that trait implementation, expected `[_]`, found `str`
    = note: required for `str` to implement `Index<usize>`
 
 error[E0277]: the type `str` cannot be indexed by `{integer}`
@@ -45,7 +46,8 @@ LL |     s.get_mut(1);
    = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
    = note: you can use `.chars().nth()` or `.bytes().nth()`
            for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[_]>` is implemented for `usize`
+   = help: for that trait implementation, expected `[_]`, found `str`
 note: required by a bound in `core::str::<impl str>::get_mut`
   --> $SRC_DIR/core/src/str/mod.rs:LL:COL
 
@@ -60,7 +62,8 @@ LL |     s.get_unchecked_mut(1);
    = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
    = note: you can use `.chars().nth()` or `.bytes().nth()`
            for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[_]>` is implemented for `usize`
+   = help: for that trait implementation, expected `[_]`, found `str`
 note: required by a bound in `core::str::<impl str>::get_unchecked_mut`
   --> $SRC_DIR/core/src/str/mod.rs:LL:COL
 
diff --git a/tests/ui/suggestions/impl-trait-missing-lifetime.stderr b/tests/ui/suggestions/impl-trait-missing-lifetime.stderr
index b476d61017f..2c29cfa0b91 100644
--- a/tests/ui/suggestions/impl-trait-missing-lifetime.stderr
+++ b/tests/ui/suggestions/impl-trait-missing-lifetime.stderr
@@ -26,9 +26,9 @@ error: lifetime may not live long enough
   --> $DIR/impl-trait-missing-lifetime.rs:16:69
    |
 LL | async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
-   |                                                    --------------   ^^^^^^^^ returning this value requires that `'1` must outlive `'static`
-   |                                                    |
-   |                                                    return type `impl Future<Output = Option<&'static ()>>` contains a lifetime `'1`
+   | -----------------------------------------------------------------   ^^^^^^^^ returning this value requires that `'1` must outlive `'static`
+   | |
+   | return type `impl Future<Output = Option<&'static ()>>` contains a lifetime `'1`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/suggestions/issue-101623.stderr b/tests/ui/suggestions/issue-101623.stderr
index 361483cc08d..9f00de17484 100644
--- a/tests/ui/suggestions/issue-101623.stderr
+++ b/tests/ui/suggestions/issue-101623.stderr
@@ -7,7 +7,8 @@ LL |     Trait::do_stuff({ fun(&mut *inner) });
    |     |               the trait `Trait<'_>` is not implemented for `*mut ()`
    |     required by a bound introduced by this call
    |
-   = help: the trait `Trait<'a>` is implemented for `()`
+   = help: the trait `Trait<'_>` is implemented for `()`
+   = help: for that trait implementation, expected `()`, found `*mut ()`
 
 error: aborting due to previous error
 
diff --git a/tests/ui/suggestions/issue-61963.stderr b/tests/ui/suggestions/issue-61963.stderr
index b99b1b0b9b3..ec62153b0a7 100644
--- a/tests/ui/suggestions/issue-61963.stderr
+++ b/tests/ui/suggestions/issue-61963.stderr
@@ -37,6 +37,7 @@ LL |     bar: Box<Bar>,
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL |     bar: Box<dyn Bar>,
@@ -50,6 +51,7 @@ LL |     bar: Box<Bar>,
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL |     bar: Box<dyn Bar>,
@@ -63,6 +65,7 @@ LL | pub struct Foo {
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | dyn pub struct Foo {
@@ -76,6 +79,7 @@ LL | pub struct Foo {
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | dyn pub struct Foo {
@@ -89,6 +93,7 @@ LL | pub struct Foo {
    |
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: use `dyn`
    |
 LL | dyn pub struct Foo {
diff --git a/tests/ui/suggestions/issue-83892.stderr b/tests/ui/suggestions/issue-83892.stderr
index baf6b1447e6..5e471819b27 100644
--- a/tests/ui/suggestions/issue-83892.stderr
+++ b/tests/ui/suggestions/issue-83892.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-83892.rs:9:15
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 LL |     match () {
 LL |         () => func()
    |               ^^^^^^ expected `()`, found `u8`
diff --git a/tests/ui/suggestions/missing-lifetime-specifier.stderr b/tests/ui/suggestions/missing-lifetime-specifier.stderr
index 21d2378382c..fa4bc2fa79d 100644
--- a/tests/ui/suggestions/missing-lifetime-specifier.stderr
+++ b/tests/ui/suggestions/missing-lifetime-specifier.stderr
@@ -164,6 +164,7 @@ note: union defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | pub union Qux<'t, 'k, I> {
    |           ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static e: RefCell<HashMap<i32, Vec<Vec<Qux<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
@@ -182,6 +183,7 @@ note: union defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | pub union Qux<'t, 'k, I> {
    |           ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static e: RefCell<HashMap<i32, Vec<Vec<Qux<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
@@ -200,6 +202,7 @@ note: union defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | pub union Qux<'t, 'k, I> {
    |           ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static e: RefCell<HashMap<i32, Vec<Vec<Qux<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
@@ -218,6 +221,7 @@ note: union defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | pub union Qux<'t, 'k, I> {
    |           ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static e: RefCell<HashMap<i32, Vec<Vec<Qux<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
@@ -254,6 +258,7 @@ note: trait defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | trait Tar<'t, 'k, I> {}
    |       ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static f: RefCell<HashMap<i32, Vec<Vec<&Tar<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
@@ -272,6 +277,7 @@ note: trait defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | trait Tar<'t, 'k, I> {}
    |       ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static f: RefCell<HashMap<i32, Vec<Vec<&Tar<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
@@ -290,6 +296,7 @@ note: trait defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | trait Tar<'t, 'k, I> {}
    |       ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static f: RefCell<HashMap<i32, Vec<Vec<&Tar<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
@@ -308,6 +315,7 @@ note: trait defined here, with 2 lifetime parameters: `'t`, `'k`
    |
 LL | trait Tar<'t, 'k, I> {}
    |       ^^^ --  --
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 help: add missing lifetime argument
    |
 LL |     static f: RefCell<HashMap<i32, Vec<Vec<&Tar<'static, 'static, i32>>>>> = RefCell::new(HashMap::new());
diff --git a/tests/ui/suggestions/return-closures.stderr b/tests/ui/suggestions/return-closures.stderr
index f0810bbb254..97c13200ac3 100644
--- a/tests/ui/suggestions/return-closures.stderr
+++ b/tests/ui/suggestions/return-closures.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/return-closures.rs:3:5
    |
 LL | fn foo() {
-   |          - help: try adding a return type: `-> impl for<'a> Fn(&'a i32) -> i32`
+   |         - help: try adding a return type: `-> impl for<'a> Fn(&'a i32) -> i32`
 LL |
 LL |     |x: &i32| 1i32
    |     ^^^^^^^^^^^^^^ expected `()`, found closure
@@ -14,7 +14,7 @@ error[E0308]: mismatched types
   --> $DIR/return-closures.rs:9:5
    |
 LL | fn bar(i: impl Sized) {
-   |                       - help: a return type might be missing here: `-> _`
+   |                      - help: a return type might be missing here: `-> _`
 LL |
 LL |     || i
    |     ^^^^ expected `()`, found closure
diff --git a/tests/ui/suggestions/slice-issue-87994.stderr b/tests/ui/suggestions/slice-issue-87994.stderr
index 84ecd749b0d..656f71eb877 100644
--- a/tests/ui/suggestions/slice-issue-87994.stderr
+++ b/tests/ui/suggestions/slice-issue-87994.stderr
@@ -1,4 +1,4 @@
-error[E0277]: the size for values of type `[i32]` cannot be known at compilation time
+error[E0277]: `[i32]` is not an iterator
   --> $DIR/slice-issue-87994.rs:3:12
    |
 LL |   for _ in v[1..] {
@@ -13,7 +13,7 @@ LL |   for _ in &v[1..] {
 LL |   for _ in &mut v[1..] {
    |            ++++
 
-error[E0277]: `[i32]` is not an iterator
+error[E0277]: the size for values of type `[i32]` cannot be known at compilation time
   --> $DIR/slice-issue-87994.rs:3:12
    |
 LL |   for _ in v[1..] {
@@ -28,7 +28,7 @@ LL |   for _ in &v[1..] {
 LL |   for _ in &mut v[1..] {
    |            ++++
 
-error[E0277]: the size for values of type `[K]` cannot be known at compilation time
+error[E0277]: `[K]` is not an iterator
   --> $DIR/slice-issue-87994.rs:11:13
    |
 LL |   for i2 in v2[1..] {
@@ -43,7 +43,7 @@ LL |   for i2 in &v2[1..] {
 LL |   for i2 in &mut v2[1..] {
    |             ++++
 
-error[E0277]: `[K]` is not an iterator
+error[E0277]: the size for values of type `[K]` cannot be known at compilation time
   --> $DIR/slice-issue-87994.rs:11:13
    |
 LL |   for i2 in v2[1..] {
diff --git a/tests/ui/suggestions/suggest-dereferencing-index.stderr b/tests/ui/suggestions/suggest-dereferencing-index.stderr
index 147dc9234c5..adf01339972 100644
--- a/tests/ui/suggestions/suggest-dereferencing-index.stderr
+++ b/tests/ui/suggestions/suggest-dereferencing-index.stderr
@@ -5,7 +5,8 @@ LL |     let one_item_please: i32 = [1, 2, 3][i];
    |                                          ^ slice indices are of type `usize` or ranges of `usize`
    |
    = help: the trait `SliceIndex<[{integer}]>` is not implemented for `&usize`
-   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
+   = help: the trait `SliceIndex<[{integer}]>` is implemented for `usize`
+   = help: for that trait implementation, expected `usize`, found `&usize`
    = note: required for `[{integer}]` to implement `Index<&usize>`
 help: dereference this index
    |
diff --git a/tests/ui/suggestions/suggest-ret-on-async-w-late.fixed b/tests/ui/suggestions/suggest-ret-on-async-w-late.fixed
new file mode 100644
index 00000000000..0a08383317f
--- /dev/null
+++ b/tests/ui/suggestions/suggest-ret-on-async-w-late.fixed
@@ -0,0 +1,14 @@
+// edition: 2021
+// run-rustfix
+
+#![allow(unused)]
+
+// Make sure we don't ICE when suggesting a return type
+// for an async fn that has late-bound vars...
+
+async fn ice(_: &i32) -> bool {
+    true
+    //~^ ERROR mismatched types
+}
+
+fn main() {}
diff --git a/tests/ui/suggestions/suggest-ret-on-async-w-late.rs b/tests/ui/suggestions/suggest-ret-on-async-w-late.rs
index 459b94f943b..5c8f185bd4b 100644
--- a/tests/ui/suggestions/suggest-ret-on-async-w-late.rs
+++ b/tests/ui/suggestions/suggest-ret-on-async-w-late.rs
@@ -1,4 +1,7 @@
 // edition: 2021
+// run-rustfix
+
+#![allow(unused)]
 
 // Make sure we don't ICE when suggesting a return type
 // for an async fn that has late-bound vars...
diff --git a/tests/ui/suggestions/suggest-ret-on-async-w-late.stderr b/tests/ui/suggestions/suggest-ret-on-async-w-late.stderr
index bff864b222b..352f6da3607 100644
--- a/tests/ui/suggestions/suggest-ret-on-async-w-late.stderr
+++ b/tests/ui/suggestions/suggest-ret-on-async-w-late.stderr
@@ -1,8 +1,8 @@
 error[E0308]: mismatched types
-  --> $DIR/suggest-ret-on-async-w-late.rs:7:5
+  --> $DIR/suggest-ret-on-async-w-late.rs:10:5
    |
 LL | async fn ice(_: &i32) {
-   |                       - help: try adding a return type: `-> bool`
+   |                      - help: try adding a return type: `-> bool`
 LL |     true
    |     ^^^^ expected `()`, found `bool`
 
diff --git a/tests/ui/tool-attributes/tool-attributes-misplaced-1.stderr b/tests/ui/tool-attributes/tool-attributes-misplaced-1.stderr
index 71fd5f1d44a..2045dc6a36e 100644
--- a/tests/ui/tool-attributes/tool-attributes-misplaced-1.stderr
+++ b/tests/ui/tool-attributes/tool-attributes-misplaced-1.stderr
@@ -9,6 +9,8 @@ error: cannot find derive macro `rustfmt` in this scope
    |
 LL | #[derive(rustfmt)]
    |          ^^^^^^^
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: cannot find attribute `rustfmt` in this scope
   --> $DIR/tool-attributes-misplaced-1.rs:9:3
diff --git a/tests/ui/tool_lints.stderr b/tests/ui/tool_lints.stderr
index d36cd193b15..f1d825caba1 100644
--- a/tests/ui/tool_lints.stderr
+++ b/tests/ui/tool_lints.stderr
@@ -13,6 +13,7 @@ LL | #[warn(foo::bar)]
    |        ^^^
    |
    = help: add `#![register_tool(foo)]` to the crate root
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/traits/associated_type_bound/impl-is-shadowed.rs b/tests/ui/traits/associated_type_bound/impl-is-shadowed.rs
new file mode 100644
index 00000000000..6c3125a9fc5
--- /dev/null
+++ b/tests/ui/traits/associated_type_bound/impl-is-shadowed.rs
@@ -0,0 +1,21 @@
+// check-pass
+trait Bar<'a> {
+    type Assoc: 'static;
+}
+
+impl<'a> Bar<'a> for () {
+    type Assoc = ();
+}
+
+struct ImplsStatic<CG: Bar<'static>> {
+    d: &'static <CG as Bar<'static>>::Assoc,
+}
+
+fn caller(b: ImplsStatic<()>)
+where
+    for<'a> (): Bar<'a>
+{
+    let _: &<() as Bar<'static>>::Assoc = b.d;
+}
+
+fn main() {}
diff --git a/tests/ui/traits/coercion-generic-bad.stderr b/tests/ui/traits/coercion-generic-bad.stderr
index e7e8a796796..30a3c40db95 100644
--- a/tests/ui/traits/coercion-generic-bad.stderr
+++ b/tests/ui/traits/coercion-generic-bad.stderr
@@ -5,6 +5,7 @@ LL |     let s: Box<dyn Trait<isize>> = Box::new(Struct { person: "Fred" });
    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait<isize>` is not implemented for `Struct`
    |
    = help: the trait `Trait<&'static str>` is implemented for `Struct`
+   = help: for that trait implementation, expected `&'static str`, found `isize`
    = note: required for the cast from `Box<Struct>` to `Box<dyn Trait<isize>>`
 
 error: aborting due to previous error
diff --git a/tests/ui/traits/copy-guessing.stderr b/tests/ui/traits/copy-guessing.stderr
index 568b7e5a64a..7e676c9da01 100644
--- a/tests/ui/traits/copy-guessing.stderr
+++ b/tests/ui/traits/copy-guessing.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `Option<T>`
   --> $DIR/copy-guessing.rs:20:9
    |
 LL |     let n = None;
-   |         ^
+   |         ^   ---- type must be known at this point
    |
 help: consider giving `n` an explicit type, where the type for type parameter `T` is specified
    |
diff --git a/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.rs b/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.rs
index 9a444be500c..205b1173e07 100644
--- a/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.rs
+++ b/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.rs
@@ -14,7 +14,5 @@ impl<X> Method<u32> for Thing<X> {
 
 fn main() {
     let thing = Thing(true);
-    thing.method(42);
-    //~^ ERROR type annotations needed
-    //~| ERROR type annotations needed
+    thing.method(42); //~ ERROR type annotations needed
 }
diff --git a/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.stderr b/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.stderr
index 57b2587ae5c..2185c51e59d 100644
--- a/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.stderr
+++ b/tests/ui/traits/do-not-mention-type-params-by-name-in-suggestion-issue-96292.stderr
@@ -1,14 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/do-not-mention-type-params-by-name-in-suggestion-issue-96292.rs:17:11
-   |
-LL |     thing.method(42);
-   |           ^^^^^^
-   |
-help: try using a fully qualified path to specify the expected types
-   |
-LL |     <Thing<bool> as Method<T>>::method(thing, 42);
-   |     +++++++++++++++++++++++++++++++++++     ~
-
 error[E0283]: type annotations needed
   --> $DIR/do-not-mention-type-params-by-name-in-suggestion-issue-96292.rs:17:11
    |
@@ -28,7 +17,6 @@ help: try using a fully qualified path to specify the expected types
 LL |     <Thing<bool> as Method<T>>::method(thing, 42);
    |     +++++++++++++++++++++++++++++++++++     ~
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/issue-38404.stderr b/tests/ui/traits/issue-38404.stderr
index f8625f53b78..a5c258eb36e 100644
--- a/tests/ui/traits/issue-38404.stderr
+++ b/tests/ui/traits/issue-38404.stderr
@@ -25,6 +25,7 @@ LL | trait A<T>: std::ops::Add<Self> + Sized {}
    |             ^^^^^^^^^^^^^^^^^^^ ...because it uses `Self` as a type parameter
 LL | trait B<T>: A<T> {}
    |       - this trait cannot be made into an object...
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/traits/issue-59029-1.stderr b/tests/ui/traits/issue-59029-1.stderr
index 203a8928530..51354bcc545 100644
--- a/tests/ui/traits/issue-59029-1.stderr
+++ b/tests/ui/traits/issue-59029-1.stderr
@@ -9,6 +9,8 @@ error[E0220]: associated type `Res` not found for `Self`
    |
 LL | trait MkSvc<Target, Req> = Svc<Target> where Self::Res: Svc<Req>;
    |                                                    ^^^ there is a similarly named associated type `Res` in the trait `Svc`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/traits/issue-77982.rs b/tests/ui/traits/issue-77982.rs
index f5be6cf21c1..2331dda9168 100644
--- a/tests/ui/traits/issue-77982.rs
+++ b/tests/ui/traits/issue-77982.rs
@@ -1,3 +1,4 @@
+// ignore-windows different list of satisfying impls
 use std::collections::HashMap;
 
 fn what() {
diff --git a/tests/ui/traits/issue-77982.stderr b/tests/ui/traits/issue-77982.stderr
index 33cc186ac0b..592cfd970c6 100644
--- a/tests/ui/traits/issue-77982.stderr
+++ b/tests/ui/traits/issue-77982.stderr
@@ -1,5 +1,5 @@
 error[E0283]: type annotations needed
-  --> $DIR/issue-77982.rs:8:10
+  --> $DIR/issue-77982.rs:9:10
    |
 LL |     opts.get(opt.as_ref());
    |          ^^^ ------------ type must be known at this point
@@ -18,7 +18,7 @@ LL |     opts.get::<Q>(opt.as_ref());
    |             +++++
 
 error[E0283]: type annotations needed
-  --> $DIR/issue-77982.rs:8:10
+  --> $DIR/issue-77982.rs:9:10
    |
 LL |     opts.get(opt.as_ref());
    |          ^^^     ------ type must be known at this point
@@ -35,25 +35,34 @@ help: consider specifying the generic argument
 LL |     opts.get::<Q>(opt.as_ref());
    |             +++++
 
-error[E0282]: type annotations needed
-  --> $DIR/issue-77982.rs:13:59
+error[E0283]: type annotations needed
+  --> $DIR/issue-77982.rs:14:59
    |
 LL |     let ips: Vec<_> = (0..100_000).map(|_| u32::from(0u32.into())).collect();
-   |                                                           ^^^^
-   |
+   |                                            ---            ^^^^
+   |                                            |
+   |                                            type must be known at this point
+   |
+   = note: multiple `impl`s satisfying `u32: From<_>` found in the `core` crate:
+           - impl From<Ipv4Addr> for u32;
+           - impl From<NonZeroU32> for u32;
+           - impl From<bool> for u32;
+           - impl From<char> for u32;
+           - impl From<u16> for u32;
+           - impl From<u8> for u32;
 help: try using a fully qualified path to specify the expected types
    |
 LL |     let ips: Vec<_> = (0..100_000).map(|_| u32::from(<u32 as Into<T>>::into(0u32))).collect();
    |                                                      +++++++++++++++++++++++    ~
 
 error[E0283]: type annotations needed for `Box<T>`
-  --> $DIR/issue-77982.rs:36:9
+  --> $DIR/issue-77982.rs:37:9
    |
 LL |     let _ = ().foo();
    |         ^      --- type must be known at this point
    |
 note: multiple `impl`s satisfying `(): Foo<'_, _>` found
-  --> $DIR/issue-77982.rs:29:1
+  --> $DIR/issue-77982.rs:30:1
    |
 LL | impl Foo<'static, u32> for () {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -65,13 +74,13 @@ LL |     let _: Box<T> = ().foo();
    |          ++++++++
 
 error[E0283]: type annotations needed for `Box<T>`
-  --> $DIR/issue-77982.rs:40:9
+  --> $DIR/issue-77982.rs:41:9
    |
 LL |     let _ = (&()).bar();
    |         ^         --- type must be known at this point
    |
 note: multiple `impl`s satisfying `&(): Bar<'_, _>` found
-  --> $DIR/issue-77982.rs:32:1
+  --> $DIR/issue-77982.rs:33:1
    |
 LL | impl<'a> Bar<'static, u32> for &'a () {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -84,5 +93,4 @@ LL |     let _: Box<T> = (&()).bar();
 
 error: aborting due to 5 previous errors
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/multidispatch-convert-ambig-dest.rs b/tests/ui/traits/multidispatch-convert-ambig-dest.rs
index aa74e11c362..36e1e868fca 100644
--- a/tests/ui/traits/multidispatch-convert-ambig-dest.rs
+++ b/tests/ui/traits/multidispatch-convert-ambig-dest.rs
@@ -25,7 +25,6 @@ where T : Convert<U>
 fn a() {
     test(22, std::default::Default::default());
     //~^ ERROR type annotations needed
-    //~| ERROR type annotations needed
 }
 
 fn main() {}
diff --git a/tests/ui/traits/multidispatch-convert-ambig-dest.stderr b/tests/ui/traits/multidispatch-convert-ambig-dest.stderr
index e927f26e96d..e3bfc78bb08 100644
--- a/tests/ui/traits/multidispatch-convert-ambig-dest.stderr
+++ b/tests/ui/traits/multidispatch-convert-ambig-dest.stderr
@@ -1,14 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/multidispatch-convert-ambig-dest.rs:26:5
-   |
-LL |     test(22, std::default::Default::default());
-   |     ^^^^ cannot infer type of the type parameter `U` declared on the function `test`
-   |
-help: consider specifying the generic arguments
-   |
-LL |     test::<i32, U>(22, std::default::Default::default());
-   |         ++++++++++
-
 error[E0283]: type annotations needed
   --> $DIR/multidispatch-convert-ambig-dest.rs:26:5
    |
@@ -37,7 +26,6 @@ help: consider specifying the generic arguments
 LL |     test::<i32, U>(22, std::default::Default::default());
    |         ++++++++++
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/new-solver/alias-bound-unsound.rs b/tests/ui/traits/new-solver/alias-bound-unsound.rs
index 38d83d289f1..825e874d71b 100644
--- a/tests/ui/traits/new-solver/alias-bound-unsound.rs
+++ b/tests/ui/traits/new-solver/alias-bound-unsound.rs
@@ -27,6 +27,5 @@ fn main() {
     //~| ERROR overflow evaluating the requirement `<() as Foo>::Item well-formed`
     //~| ERROR overflow evaluating the requirement `String <: <() as Foo>::Item`
     //~| ERROR overflow evaluating the requirement `&<() as Foo>::Item well-formed`
-    //~| ERROR type annotations needed
     println!("{x}");
 }
diff --git a/tests/ui/traits/new-solver/alias-bound-unsound.stderr b/tests/ui/traits/new-solver/alias-bound-unsound.stderr
index abc6677c132..ca4b5c90ff2 100644
--- a/tests/ui/traits/new-solver/alias-bound-unsound.stderr
+++ b/tests/ui/traits/new-solver/alias-bound-unsound.stderr
@@ -11,18 +11,7 @@ note: required by a bound in `Foo::Item`
 LL |     type Item: Copy
    |                ^^^^ required by this bound in `Foo::Item`
 
-error[E0282]: type annotations needed
-  --> $DIR/alias-bound-unsound.rs:24:5
-   |
-LL |     drop(<() as Foo>::copy_me(&x));
-   |     ^^^^ cannot infer type of the type parameter `T` declared on the function `drop`
-   |
-help: consider specifying the generic argument
-   |
-LL |     drop::<T>(<() as Foo>::copy_me(&x));
-   |         +++++
-
-error[E0275]: overflow evaluating the requirement `&<() as Foo>::Item well-formed`
+error[E0275]: overflow evaluating the requirement `String <: <() as Foo>::Item`
   --> $DIR/alias-bound-unsound.rs:24:31
    |
 LL |     drop(<() as Foo>::copy_me(&x));
@@ -30,40 +19,39 @@ LL |     drop(<() as Foo>::copy_me(&x));
    |
    = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`alias_bound_unsound`)
 
-error[E0275]: overflow evaluating the requirement `String <: <() as Foo>::Item`
-  --> $DIR/alias-bound-unsound.rs:24:31
+error[E0275]: overflow evaluating the requirement `<() as Foo>::Item == _`
+  --> $DIR/alias-bound-unsound.rs:24:10
    |
 LL |     drop(<() as Foo>::copy_me(&x));
-   |                               ^^
+   |          ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`alias_bound_unsound`)
 
-error[E0275]: overflow evaluating the requirement `<() as Foo>::Item well-formed`
+error[E0275]: overflow evaluating the requirement `<() as Foo>::Item: Sized`
   --> $DIR/alias-bound-unsound.rs:24:10
    |
 LL |     drop(<() as Foo>::copy_me(&x));
-   |          ^^^^^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^^^
    |
    = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`alias_bound_unsound`)
+   = note: the return type of a function must have a statically known size
 
-error[E0275]: overflow evaluating the requirement `<() as Foo>::Item == _`
-  --> $DIR/alias-bound-unsound.rs:24:10
+error[E0275]: overflow evaluating the requirement `&<() as Foo>::Item well-formed`
+  --> $DIR/alias-bound-unsound.rs:24:31
    |
 LL |     drop(<() as Foo>::copy_me(&x));
-   |          ^^^^^^^^^^^^^^^^^^^^^^^^
+   |                               ^^
    |
    = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`alias_bound_unsound`)
 
-error[E0275]: overflow evaluating the requirement `<() as Foo>::Item: Sized`
+error[E0275]: overflow evaluating the requirement `<() as Foo>::Item well-formed`
   --> $DIR/alias-bound-unsound.rs:24:10
    |
 LL |     drop(<() as Foo>::copy_me(&x));
-   |          ^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`alias_bound_unsound`)
-   = note: the return type of a function must have a statically known size
 
-error: aborting due to 7 previous errors
+error: aborting due to 6 previous errors
 
-Some errors have detailed explanations: E0275, E0282.
-For more information about an error, try `rustc --explain E0275`.
+For more information about this error, try `rustc --explain E0275`.
diff --git a/tests/ui/traits/new-solver/assembly/runaway-impl-candidate-selection.stderr b/tests/ui/traits/new-solver/assembly/runaway-impl-candidate-selection.stderr
index 47004821ad7..414deb47727 100644
--- a/tests/ui/traits/new-solver/assembly/runaway-impl-candidate-selection.stderr
+++ b/tests/ui/traits/new-solver/assembly/runaway-impl-candidate-selection.stderr
@@ -1,9 +1,16 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/runaway-impl-candidate-selection.rs:13:22
    |
 LL |     println!("{:?}", iter::<_>());
    |                      ^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `iter`
+   |
+   = note: cannot satisfy `_: Iterator`
+note: required by a bound in `iter`
+  --> $DIR/runaway-impl-candidate-selection.rs:8:12
+   |
+LL | fn iter<T: Iterator>() -> <T as Iterator>::Item {
+   |            ^^^^^^^^ required by this bound in `iter`
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.rs b/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.rs
index fcafdcf637a..44e763ef990 100644
--- a/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.rs
+++ b/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.rs
@@ -27,6 +27,5 @@ fn impls<T: Trait>() {}
 
 fn main() {
     impls::<W<_>>();
-    //~^ ERROR type annotations needed
-    //~| ERROR overflow evaluating the requirement
+    //~^ ERROR overflow evaluating the requirement
 }
diff --git a/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.stderr b/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.stderr
index a861156711d..1ac0e297729 100644
--- a/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.stderr
+++ b/tests/ui/traits/new-solver/cycles/coinduction/fixpoint-exponential-growth.stderr
@@ -1,9 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/fixpoint-exponential-growth.rs:29:5
-   |
-LL |     impls::<W<_>>();
-   |     ^^^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `impls`
-
 error[E0275]: overflow evaluating the requirement `W<_>: Trait`
   --> $DIR/fixpoint-exponential-growth.rs:29:13
    |
@@ -17,7 +11,6 @@ note: required by a bound in `impls`
 LL | fn impls<T: Trait>() {}
    |             ^^^^^ required by this bound in `impls`
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0275, E0282.
-For more information about an error, try `rustc --explain E0275`.
+For more information about this error, try `rustc --explain E0275`.
diff --git a/tests/ui/traits/new-solver/generalize/generalize-proj-new-universe-index-2.stderr b/tests/ui/traits/new-solver/generalize/generalize-proj-new-universe-index-2.stderr
index 9a8060133b8..9aa4f4531f9 100644
--- a/tests/ui/traits/new-solver/generalize/generalize-proj-new-universe-index-2.stderr
+++ b/tests/ui/traits/new-solver/generalize/generalize-proj-new-universe-index-2.stderr
@@ -1,9 +1,18 @@
-error[E0282]: type annotations needed
+error[E0284]: type annotations needed: cannot satisfy `<<Leaf as WithAssoc<_>>::Assoc as Id>::Assoc == <<Leaf as WithAssoc<_>>::Assoc as Id>::Assoc`
   --> $DIR/generalize-proj-new-universe-index-2.rs:74:5
    |
 LL |     bound::<<Rigid as IdHigherRankedBound>::Assoc, <Wrapper<Leaf> as Id>::Assoc, _>()
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type of the type parameter `V` declared on the function `bound`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot satisfy `<<Leaf as WithAssoc<_>>::Assoc as Id>::Assoc == <<Leaf as WithAssoc<_>>::Assoc as Id>::Assoc`
+   |
+note: required by a bound in `bound`
+  --> $DIR/generalize-proj-new-universe-index-2.rs:69:21
+   |
+LL | fn bound<T: ?Sized, U: ?Sized, V: ?Sized>()
+   |    ----- required by a bound in this function
+LL | where
+LL |     T: WithAssoc<U, Assoc = V>,
+   |                     ^^^^^^^^^ required by this bound in `bound`
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0284`.
diff --git a/tests/ui/traits/new-solver/normalizes_to_ignores_unnormalizable_candidate.self_infer.stderr b/tests/ui/traits/new-solver/normalizes_to_ignores_unnormalizable_candidate.self_infer.stderr
index 06283201261..f482e8cfaf9 100644
--- a/tests/ui/traits/new-solver/normalizes_to_ignores_unnormalizable_candidate.self_infer.stderr
+++ b/tests/ui/traits/new-solver/normalizes_to_ignores_unnormalizable_candidate.self_infer.stderr
@@ -1,9 +1,17 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/normalizes_to_ignores_unnormalizable_candidate.rs:36:5
    |
 LL |     foo(unconstrained())
-   |     ^^^ cannot infer type of the type parameter `T` declared on the function `foo`
+   |     ^^^ --------------- type must be known at this point
+   |     |
+   |     cannot infer type of the type parameter `T` declared on the function `foo`
    |
+   = note: cannot satisfy `_: Trait`
+note: required by a bound in `foo`
+  --> $DIR/normalizes_to_ignores_unnormalizable_candidate.rs:19:11
+   |
+LL | fn foo<T: Trait<Assoc = u8>>(x: T) {}
+   |           ^^^^^^^^^^^^^^^^^ required by this bound in `foo`
 help: consider specifying the generic argument
    |
 LL |     foo::<T>(unconstrained())
@@ -11,4 +19,4 @@ LL |     foo::<T>(unconstrained())
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/new-solver/overflow/exponential-trait-goals.rs b/tests/ui/traits/new-solver/overflow/exponential-trait-goals.rs
index b37f09ee185..3d2e70a639f 100644
--- a/tests/ui/traits/new-solver/overflow/exponential-trait-goals.rs
+++ b/tests/ui/traits/new-solver/overflow/exponential-trait-goals.rs
@@ -15,6 +15,5 @@ fn impls<T: Trait>() {}
 
 fn main() {
     impls::<W<_>>();
-    //~^ ERROR type annotations needed
-    //~| ERROR overflow evaluating the requirement `W<_>: Trait`
+    //~^ ERROR overflow evaluating the requirement `W<_>: Trait`
 }
diff --git a/tests/ui/traits/new-solver/overflow/exponential-trait-goals.stderr b/tests/ui/traits/new-solver/overflow/exponential-trait-goals.stderr
index beed40f3649..023efc41aeb 100644
--- a/tests/ui/traits/new-solver/overflow/exponential-trait-goals.stderr
+++ b/tests/ui/traits/new-solver/overflow/exponential-trait-goals.stderr
@@ -1,9 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/exponential-trait-goals.rs:17:5
-   |
-LL |     impls::<W<_>>();
-   |     ^^^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `impls`
-
 error[E0275]: overflow evaluating the requirement `W<_>: Trait`
   --> $DIR/exponential-trait-goals.rs:17:13
    |
@@ -17,7 +11,6 @@ note: required by a bound in `impls`
 LL | fn impls<T: Trait>() {}
    |             ^^^^^ required by this bound in `impls`
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0275, E0282.
-For more information about an error, try `rustc --explain E0275`.
+For more information about this error, try `rustc --explain E0275`.
diff --git a/tests/ui/traits/non_lifetime_binders/bad-sized-cond.stderr b/tests/ui/traits/non_lifetime_binders/bad-sized-cond.stderr
index ed9b57cb1bd..d8db07277c5 100644
--- a/tests/ui/traits/non_lifetime_binders/bad-sized-cond.stderr
+++ b/tests/ui/traits/non_lifetime_binders/bad-sized-cond.stderr
@@ -23,13 +23,13 @@ LL | where
 LL |     for<V> V: Sized,
    |               ^^^^^ required by this bound in `foo`
 
-error[E0277]: the size for values of type `V` cannot be known at compilation time
+error[E0277]: `V` is not an iterator
   --> $DIR/bad-sized-cond.rs:20:5
    |
 LL |     bar();
-   |     ^^^ doesn't have a size known at compile-time
+   |     ^^^ `V` is not an iterator
    |
-   = help: the trait `Sized` is not implemented for `V`
+   = help: the trait `Iterator` is not implemented for `V`
    = note: required for `V` to implement `IntoIterator`
 note: required by a bound in `bar`
   --> $DIR/bad-sized-cond.rs:12:15
@@ -40,13 +40,13 @@ LL | where
 LL |     for<V> V: IntoIterator,
    |               ^^^^^^^^^^^^ required by this bound in `bar`
 
-error[E0277]: `V` is not an iterator
+error[E0277]: the size for values of type `V` cannot be known at compilation time
   --> $DIR/bad-sized-cond.rs:20:5
    |
 LL |     bar();
-   |     ^^^ `V` is not an iterator
+   |     ^^^ doesn't have a size known at compile-time
    |
-   = help: the trait `Iterator` is not implemented for `V`
+   = help: the trait `Sized` is not implemented for `V`
    = note: required for `V` to implement `IntoIterator`
 note: required by a bound in `bar`
   --> $DIR/bad-sized-cond.rs:12:15
diff --git a/tests/ui/traits/non_lifetime_binders/on-rpit.rs b/tests/ui/traits/non_lifetime_binders/on-rpit.rs
new file mode 100644
index 00000000000..c501e057e28
--- /dev/null
+++ b/tests/ui/traits/non_lifetime_binders/on-rpit.rs
@@ -0,0 +1,16 @@
+// check-pass
+
+#![feature(non_lifetime_binders)]
+//~^ WARN the feature `non_lifetime_binders` is incomplete
+
+trait Trait<T: ?Sized> {}
+
+impl<T: ?Sized> Trait<T> for i32 {}
+
+fn produce() -> impl for<T> Trait<T> {
+    16
+}
+
+fn main() {
+    let _ = produce();
+}
diff --git a/tests/ui/traits/non_lifetime_binders/on-rpit.stderr b/tests/ui/traits/non_lifetime_binders/on-rpit.stderr
new file mode 100644
index 00000000000..34c56068c5c
--- /dev/null
+++ b/tests/ui/traits/non_lifetime_binders/on-rpit.stderr
@@ -0,0 +1,11 @@
+warning: the feature `non_lifetime_binders` is incomplete and may not be safe to use and/or cause compiler crashes
+  --> $DIR/on-rpit.rs:3:12
+   |
+LL | #![feature(non_lifetime_binders)]
+   |            ^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: see issue #108185 <https://github.com/rust-lang/rust/issues/108185> for more information
+   = note: `#[warn(incomplete_features)]` on by default
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.rs b/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.rs
index 538e74ee1b0..e9e2f6b1290 100644
--- a/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.rs
+++ b/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.rs
@@ -18,7 +18,5 @@ where
 
 fn main() {
     let a = A(B);
-    a.method();
-    //~^ ERROR type annotations needed
-    //~| ERROR type annotations needed
+    a.method(); //~ ERROR type annotations needed
 }
diff --git a/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.stderr b/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.stderr
index 92d9d32cf9c..86ae49b32fc 100644
--- a/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.stderr
+++ b/tests/ui/traits/not-suggest-non-existing-fully-qualified-path.stderr
@@ -1,14 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/not-suggest-non-existing-fully-qualified-path.rs:21:7
-   |
-LL |     a.method();
-   |       ^^^^^^
-   |
-help: try using a fully qualified path to specify the expected types
-   |
-LL |     <A<B> as V<U>>::method(a);
-   |     +++++++++++++++++++++++ ~
-
 error[E0283]: type annotations needed
   --> $DIR/not-suggest-non-existing-fully-qualified-path.rs:21:7
    |
@@ -35,7 +24,6 @@ help: try using a fully qualified path to specify the expected types
 LL |     <A<B> as V<U>>::method(a);
    |     +++++++++++++++++++++++ ~
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/suggest-fully-qualified-closure.stderr b/tests/ui/traits/suggest-fully-qualified-closure.stderr
index 2aea3783fea..43cef7027a2 100644
--- a/tests/ui/traits/suggest-fully-qualified-closure.stderr
+++ b/tests/ui/traits/suggest-fully-qualified-closure.stderr
@@ -1,14 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/suggest-fully-qualified-closure.rs:23:7
-   |
-LL |     q.lol(||());
-   |       ^^^
-   |
-help: try using a fully qualified path to specify the expected types
-   |
-LL |     <Qqq as MyTrait<T>>::lol::<{closure@}>(&q, ||());
-   |     +++ ~
-
 error[E0283]: type annotations needed
   --> $DIR/suggest-fully-qualified-closure.rs:23:7
    |
@@ -28,7 +17,6 @@ help: try using a fully qualified path to specify the expected types
 LL |     <Qqq as MyTrait<T>>::lol::<{closure@}>(&q, ||());
    |     +++ ~
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.rs b/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.rs
index 9a2cf469d08..f0861857bf7 100644
--- a/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.rs
+++ b/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.rs
@@ -42,9 +42,7 @@ impl<T> DerefMut for DerefsTo<T> {
 
 fn main() {
     let mut thing = Thing;
-    thing.method();
-    //~^ ERROR type annotations needed
-    //~| ERROR type annotations needed
+    thing.method(); //~ ERROR type annotations needed
     thing.mut_method(); //~ ERROR type annotations needed
     thing.by_self(); //~ ERROR type annotations needed
 
diff --git a/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.stderr b/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.stderr
index 68b31a1ca34..841acb5ffd3 100644
--- a/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.stderr
+++ b/tests/ui/traits/suggest-fully-qualified-path-with-adjustment.stderr
@@ -1,14 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:45:11
-   |
-LL |     thing.method();
-   |           ^^^^^^
-   |
-help: try using a fully qualified path to specify the expected types
-   |
-LL |     <Thing as Method<T>>::method(&thing);
-   |     ++++++++++++++++++++++++++++++     ~
-
 error[E0283]: type annotations needed
   --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:45:11
    |
@@ -29,7 +18,7 @@ LL |     <Thing as Method<T>>::method(&thing);
    |     ++++++++++++++++++++++++++++++     ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:48:11
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:46:11
    |
 LL |     thing.mut_method();
    |           ^^^^^^^^^^
@@ -48,7 +37,7 @@ LL |     <Thing as Method<T>>::mut_method(&mut thing);
    |     +++++++++++++++++++++++++++++++++++++      ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:49:11
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:47:11
    |
 LL |     thing.by_self();
    |           ^^^^^^^
@@ -67,7 +56,7 @@ LL |     <&Thing as MethodRef<T>>::by_self(&thing);
    |     +++++++++++++++++++++++++++++++++++     ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:52:14
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:50:14
    |
 LL |     deref_to.method();
    |              ^^^^^^
@@ -86,7 +75,7 @@ LL |     <Thing as Method<T>>::method(&deref_to);
    |     ++++++++++++++++++++++++++++++        ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:53:14
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:51:14
    |
 LL |     deref_to.mut_method();
    |              ^^^^^^^^^^
@@ -105,7 +94,7 @@ LL |     <Thing as Method<T>>::mut_method(&mut deref_to);
    |     +++++++++++++++++++++++++++++++++++++         ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:54:14
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:52:14
    |
 LL |     deref_to.by_self();
    |              ^^^^^^^
@@ -124,7 +113,7 @@ LL |     <&Thing as MethodRef<T>>::by_self(&deref_to);
    |     +++++++++++++++++++++++++++++++++++        ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:57:20
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:55:20
    |
 LL |     deref_deref_to.method();
    |                    ^^^^^^
@@ -143,7 +132,7 @@ LL |     <Thing as Method<T>>::method(&deref_deref_to);
    |     ++++++++++++++++++++++++++++++              ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:58:20
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:56:20
    |
 LL |     deref_deref_to.mut_method();
    |                    ^^^^^^^^^^
@@ -162,7 +151,7 @@ LL |     <Thing as Method<T>>::mut_method(&mut deref_deref_to);
    |     +++++++++++++++++++++++++++++++++++++               ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:59:20
+  --> $DIR/suggest-fully-qualified-path-with-adjustment.rs:57:20
    |
 LL |     deref_deref_to.by_self();
    |                    ^^^^^^^
@@ -180,7 +169,6 @@ help: try using a fully qualified path to specify the expected types
 LL |     <&Thing as MethodRef<T>>::by_self(&deref_deref_to);
    |     +++++++++++++++++++++++++++++++++++              ~
 
-error: aborting due to 10 previous errors
+error: aborting due to 9 previous errors
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.rs b/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.rs
index da640c8c8c2..6a63e27f75f 100644
--- a/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.rs
+++ b/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.rs
@@ -42,9 +42,7 @@ impl<T> DerefMut for DerefsTo<T> {
 
 fn main() {
     let mut ref_thing = &Thing;
-    ref_thing.method();
-    //~^ ERROR type annotations needed
-    //~| ERROR type annotations needed
+    ref_thing.method(); //~ ERROR type annotations needed
     ref_thing.by_self(); //~ ERROR type annotations needed
 
     let mut mut_thing = &mut Thing;
diff --git a/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.stderr b/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.stderr
index 27518a54e75..1865d81bad1 100644
--- a/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.stderr
+++ b/tests/ui/traits/suggest-fully-qualified-path-without-adjustment.stderr
@@ -1,14 +1,3 @@
-error[E0282]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:45:15
-   |
-LL |     ref_thing.method();
-   |               ^^^^^^
-   |
-help: try using a fully qualified path to specify the expected types
-   |
-LL |     <Thing as Method<T>>::method(ref_thing);
-   |     +++++++++++++++++++++++++++++         ~
-
 error[E0283]: type annotations needed
   --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:45:15
    |
@@ -29,7 +18,7 @@ LL |     <Thing as Method<T>>::method(ref_thing);
    |     +++++++++++++++++++++++++++++         ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:48:15
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:46:15
    |
 LL |     ref_thing.by_self();
    |               ^^^^^^^
@@ -48,7 +37,7 @@ LL |     <&Thing as MethodRef<T>>::by_self(ref_thing);
    |     ++++++++++++++++++++++++++++++++++         ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:51:15
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:49:15
    |
 LL |     mut_thing.method();
    |               ^^^^^^
@@ -67,7 +56,7 @@ LL |     <Thing as Method<T>>::method(mut_thing);
    |     +++++++++++++++++++++++++++++         ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:52:15
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:50:15
    |
 LL |     mut_thing.mut_method();
    |               ^^^^^^^^^^
@@ -86,7 +75,7 @@ LL |     <Thing as Method<T>>::mut_method(mut_thing);
    |     +++++++++++++++++++++++++++++++++         ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:53:15
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:51:15
    |
 LL |     mut_thing.by_self();
    |               ^^^^^^^
@@ -105,7 +94,7 @@ LL |     <&Thing as MethodRef<T>>::by_self(mut_thing);
    |     ++++++++++++++++++++++++++++++++++         ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:56:14
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:54:14
    |
 LL |     deref_to.method();
    |              ^^^^^^
@@ -124,7 +113,7 @@ LL |     <Thing as Method<T>>::method(deref_to);
    |     +++++++++++++++++++++++++++++        ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:57:14
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:55:14
    |
 LL |     deref_to.mut_method();
    |              ^^^^^^^^^^
@@ -143,7 +132,7 @@ LL |     <Thing as Method<T>>::mut_method(deref_to);
    |     +++++++++++++++++++++++++++++++++        ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:58:14
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:56:14
    |
 LL |     deref_to.by_self();
    |              ^^^^^^^
@@ -162,7 +151,7 @@ LL |     <&Thing as MethodRef<T>>::by_self(deref_to);
    |     ++++++++++++++++++++++++++++++++++        ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:61:20
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:59:20
    |
 LL |     deref_deref_to.method();
    |                    ^^^^^^
@@ -181,7 +170,7 @@ LL |     <Thing as Method<T>>::method(deref_deref_to);
    |     +++++++++++++++++++++++++++++              ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:62:20
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:60:20
    |
 LL |     deref_deref_to.mut_method();
    |                    ^^^^^^^^^^
@@ -200,7 +189,7 @@ LL |     <Thing as Method<T>>::mut_method(deref_deref_to);
    |     +++++++++++++++++++++++++++++++++              ~
 
 error[E0283]: type annotations needed
-  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:63:20
+  --> $DIR/suggest-fully-qualified-path-without-adjustment.rs:61:20
    |
 LL |     deref_deref_to.by_self();
    |                    ^^^^^^^
@@ -218,7 +207,6 @@ help: try using a fully qualified path to specify the expected types
 LL |     <&Thing as MethodRef<T>>::by_self(deref_deref_to);
    |     ++++++++++++++++++++++++++++++++++              ~
 
-error: aborting due to 12 previous errors
+error: aborting due to 11 previous errors
 
-Some errors have detailed explanations: E0282, E0283.
-For more information about an error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/try-block/try-block-bad-type.stderr b/tests/ui/try-block/try-block-bad-type.stderr
index e11c3f81003..b41bf86d3d9 100644
--- a/tests/ui/try-block/try-block-bad-type.stderr
+++ b/tests/ui/try-block/try-block-bad-type.stderr
@@ -6,6 +6,7 @@ LL |         Err("")?;
    |
    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
    = help: the trait `From<Infallible>` is implemented for `TryFromSliceError`
+   = help: for that trait implementation, expected `Infallible`, found `&str`
    = note: required for `Result<u32, TryFromSliceError>` to implement `FromResidual<Result<Infallible, &str>>`
 
 error[E0271]: type mismatch resolving `<Result<i32, i32> as Try>::Output == &str`
diff --git a/tests/ui/try-trait/bad-interconversion.stderr b/tests/ui/try-trait/bad-interconversion.stderr
index 7eb392faa66..d8b9431becc 100644
--- a/tests/ui/try-trait/bad-interconversion.stderr
+++ b/tests/ui/try-trait/bad-interconversion.stderr
@@ -73,7 +73,8 @@ LL |     ControlFlow::Continue(Err("hello")?)
    |                                       ^ this `?` produces `Result<Infallible, &str>`, which is incompatible with `ControlFlow<String>`
    |
    = help: the trait `FromResidual<Result<Infallible, &str>>` is not implemented for `ControlFlow<String>`
-   = help: the trait `FromResidual` is implemented for `ControlFlow<B, C>`
+   = help: the trait `FromResidual<ControlFlow<String, Infallible>>` is implemented for `ControlFlow<String>`
+   = help: for that trait implementation, expected `ControlFlow<String, Infallible>`, found `Result<Infallible, &str>`
 
 error[E0277]: the `?` operator can only be used on `ControlFlow`s in a function that returns `ControlFlow`
   --> $DIR/bad-interconversion.rs:37:12
@@ -84,7 +85,8 @@ LL |     Some(3)?;
    |            ^ this `?` produces `Option<Infallible>`, which is incompatible with `ControlFlow<u64>`
    |
    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `ControlFlow<u64>`
-   = help: the trait `FromResidual` is implemented for `ControlFlow<B, C>`
+   = help: the trait `FromResidual<ControlFlow<u64, Infallible>>` is implemented for `ControlFlow<u64>`
+   = help: for that trait implementation, expected `ControlFlow<u64, Infallible>`, found `Option<Infallible>`
 
 error[E0277]: the `?` operator in a function that returns `ControlFlow<B, _>` can only be used on other `ControlFlow<B, _>`s (with the same Break type)
   --> $DIR/bad-interconversion.rs:43:29
@@ -96,7 +98,8 @@ LL |     ControlFlow::Break(4_u8)?;
    |
    = help: the trait `FromResidual<ControlFlow<u8, Infallible>>` is not implemented for `ControlFlow<i64>`
    = note: unlike `Result`, there's no `From`-conversion performed for `ControlFlow`
-   = help: the trait `FromResidual` is implemented for `ControlFlow<B, C>`
+   = help: the trait `FromResidual<ControlFlow<i64, Infallible>>` is implemented for `ControlFlow<i64>`
+   = help: for that trait implementation, expected `i64`, found `u8`
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/tuple/tuple-struct-fields/test2.stderr b/tests/ui/tuple/tuple-struct-fields/test2.stderr
index 64a9ac13566..784411aba8f 100644
--- a/tests/ui/tuple/tuple-struct-fields/test2.stderr
+++ b/tests/ui/tuple/tuple-struct-fields/test2.stderr
@@ -22,6 +22,8 @@ error[E0412]: cannot find type `foo` in this scope
    |
 LL |     define_struct! { (foo) }
    |                       ^^^ not found in this scope
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/tuple/tuple-struct-fields/test3.stderr b/tests/ui/tuple/tuple-struct-fields/test3.stderr
index 75262ed5780..00b07c03152 100644
--- a/tests/ui/tuple/tuple-struct-fields/test3.stderr
+++ b/tests/ui/tuple/tuple-struct-fields/test3.stderr
@@ -22,6 +22,8 @@ error[E0412]: cannot find type `foo` in this scope
    |
 LL |     define_struct! { foo }
    |                      ^^^ not found in this scope
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/type-alias-enum-variants/enum-variant-priority-lint-ambiguous_associated_items.stderr b/tests/ui/type-alias-enum-variants/enum-variant-priority-lint-ambiguous_associated_items.stderr
index 0202a2fea49..359bd09ecd0 100644
--- a/tests/ui/type-alias-enum-variants/enum-variant-priority-lint-ambiguous_associated_items.stderr
+++ b/tests/ui/type-alias-enum-variants/enum-variant-priority-lint-ambiguous_associated_items.stderr
@@ -36,6 +36,7 @@ note: `V` could also refer to the associated type defined here
    |
 LL |     type V;
    |     ^^^^^^
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/type-alias-impl-trait/normalize-alias-type.rs b/tests/ui/type-alias-impl-trait/normalize-alias-type.rs
new file mode 100644
index 00000000000..7c62002b931
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/normalize-alias-type.rs
@@ -0,0 +1,32 @@
+// check-pass
+// compile-flags: -Z mir-opt-level=3
+#![feature(type_alias_impl_trait)]
+#![crate_type = "lib"]
+pub trait Tr {
+    fn get(&self) -> u32;
+}
+
+impl Tr for (u32,) {
+    #[inline]
+    fn get(&self) -> u32 { self.0 }
+}
+
+pub fn tr1() -> impl Tr {
+    (32,)
+}
+
+pub fn tr2() -> impl Tr {
+    struct Inner {
+        x: X,
+    }
+    type X = impl Tr;
+    impl Tr for Inner {
+        fn get(&self) -> u32 {
+            self.x.get()
+        }
+    }
+
+    Inner {
+        x: tr1(),
+    }
+}
diff --git a/tests/ui/type-alias-impl-trait/tait-normalize.rs b/tests/ui/type-alias-impl-trait/tait-normalize.rs
new file mode 100644
index 00000000000..26d94dbb42a
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/tait-normalize.rs
@@ -0,0 +1,14 @@
+// check-pass
+
+#![feature(type_alias_impl_trait)]
+
+fn enum_upvar() {
+    type T = impl Copy;
+    let foo: T = Some((1u32, 2u32));
+    let x = move || match foo {
+        None => (),
+        Some((a, b)) => (),
+    };
+}
+
+fn main(){}
diff --git a/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.rs b/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.rs
index 857066c78c9..9796823a724 100644
--- a/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.rs
+++ b/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.rs
@@ -4,7 +4,7 @@
 // FIXME: this is ruled out for now but should work
 
 type Foo = fn() -> impl Send;
-//~^ ERROR: `impl Trait` only allowed in function and inherent method return types
+//~^ ERROR: `impl Trait` only allowed in function and inherent method argument and return types
 
 fn make_foo() -> Foo {
     || 15
diff --git a/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.stderr b/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.stderr
index ff375b2ff86..e57c59d6165 100644
--- a/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.stderr
+++ b/tests/ui/type-alias-impl-trait/type-alias-impl-trait-fn-type.stderr
@@ -1,4 +1,4 @@
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return types
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in `fn` pointer return types
   --> $DIR/type-alias-impl-trait-fn-type.rs:6:20
    |
 LL | type Foo = fn() -> impl Send;
diff --git a/tests/ui/type-inference/sort_by_key.stderr b/tests/ui/type-inference/sort_by_key.stderr
index de7b4b24899..81af024b3fb 100644
--- a/tests/ui/type-inference/sort_by_key.stderr
+++ b/tests/ui/type-inference/sort_by_key.stderr
@@ -1,9 +1,14 @@
-error[E0282]: type annotations needed
+error[E0283]: type annotations needed
   --> $DIR/sort_by_key.rs:3:40
    |
 LL |     lst.sort_by_key(|&(v, _)| v.iter().sum());
-   |                                        ^^^ cannot infer type of the type parameter `S` declared on the method `sum`
+   |         -----------                    ^^^ cannot infer type of the type parameter `S` declared on the method `sum`
+   |         |
+   |         type must be known at this point
    |
+   = note: cannot satisfy `_: Ord`
+note: required by a bound in `slice::<impl [T]>::sort_by_key`
+  --> $SRC_DIR/alloc/src/slice.rs:LL:COL
 help: consider specifying the generic argument
    |
 LL |     lst.sort_by_key(|&(v, _)| v.iter().sum::<S>());
@@ -11,4 +16,4 @@ LL |     lst.sort_by_key(|&(v, _)| v.iter().sum::<S>());
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0283`.
diff --git a/tests/ui/type/subtyping-opaque-type.rs b/tests/ui/type/subtyping-opaque-type.rs
new file mode 100644
index 00000000000..beda232ea8b
--- /dev/null
+++ b/tests/ui/type/subtyping-opaque-type.rs
@@ -0,0 +1,19 @@
+// check-pass
+// compile-flags: -Zvalidate-mir
+trait Duh {}
+
+impl Duh for i32 {}
+
+trait Trait {
+    type Assoc: Duh;
+}
+
+impl<R: Duh, F: FnMut() -> R> Trait for F {
+    type Assoc = R;
+}
+
+fn foo() -> impl Trait<Assoc = impl Send> {
+    || 42
+}
+
+fn main() {}
diff --git a/tests/ui/type/type-check/cannot_infer_local_or_vec.stderr b/tests/ui/type/type-check/cannot_infer_local_or_vec.stderr
index 09c4b2053b2..7be00341d10 100644
--- a/tests/ui/type/type-check/cannot_infer_local_or_vec.stderr
+++ b/tests/ui/type/type-check/cannot_infer_local_or_vec.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `Vec<_>`
   --> $DIR/cannot_infer_local_or_vec.rs:2:9
    |
 LL |     let x = vec![];
-   |         ^
+   |         ^   ------ type must be known at this point
    |
 help: consider giving `x` an explicit type, where the placeholders `_` are specified
    |
diff --git a/tests/ui/type/type-check/point-at-inference-issue-116155.rs b/tests/ui/type/type-check/point-at-inference-issue-116155.rs
new file mode 100644
index 00000000000..1e9942d42e8
--- /dev/null
+++ b/tests/ui/type/type-check/point-at-inference-issue-116155.rs
@@ -0,0 +1,17 @@
+struct S<T>(T);
+
+impl<T> S<T> {
+    fn new() -> Self {
+        loop {}
+    }
+
+    fn constrain<F: Fn() -> T>(&self, _f: F) {}
+}
+
+fn main() {
+    let s = S::new();
+    let c = || true;
+    s.constrain(c);
+    let _: S<usize> = s;
+    //~^ ERROR mismatched types
+}
diff --git a/tests/ui/type/type-check/point-at-inference-issue-116155.stderr b/tests/ui/type/type-check/point-at-inference-issue-116155.stderr
new file mode 100644
index 00000000000..c8c01603cb8
--- /dev/null
+++ b/tests/ui/type/type-check/point-at-inference-issue-116155.stderr
@@ -0,0 +1,18 @@
+error[E0308]: mismatched types
+  --> $DIR/point-at-inference-issue-116155.rs:15:23
+   |
+LL |     s.constrain(c);
+   |     -           - this argument has type `{closure@$DIR/point-at-inference-issue-116155.rs:13:13: 13:15}`...
+   |     |
+   |     ... which causes `s` to have type `S<bool>`
+LL |     let _: S<usize> = s;
+   |            --------   ^ expected `S<usize>`, found `S<bool>`
+   |            |
+   |            expected due to this
+   |
+   = note: expected struct `S<usize>`
+              found struct `S<bool>`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/tests/ui/typeck/issue-104513-ice.rs b/tests/ui/typeck/issue-104513-ice.rs
index bcac0fa1e70..4968d3f51fe 100644
--- a/tests/ui/typeck/issue-104513-ice.rs
+++ b/tests/ui/typeck/issue-104513-ice.rs
@@ -1,6 +1,6 @@
 struct S;
 fn f() {
     let _: S<impl Oops> = S; //~ ERROR cannot find trait `Oops` in this scope
-    //~^ ERROR `impl Trait` only allowed in function and inherent method return types
+    //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types
 }
 fn main() {}
diff --git a/tests/ui/typeck/issue-104513-ice.stderr b/tests/ui/typeck/issue-104513-ice.stderr
index 09187d7863a..56c6b336154 100644
--- a/tests/ui/typeck/issue-104513-ice.stderr
+++ b/tests/ui/typeck/issue-104513-ice.stderr
@@ -4,7 +4,7 @@ error[E0405]: cannot find trait `Oops` in this scope
 LL |     let _: S<impl Oops> = S;
    |                   ^^^^ not found in this scope
 
-error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable bindings
+error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in variable bindings
   --> $DIR/issue-104513-ice.rs:3:14
    |
 LL |     let _: S<impl Oops> = S;
diff --git a/tests/ui/typeck/issue-57673-ice-on-deref-of-boxed-trait.stderr b/tests/ui/typeck/issue-57673-ice-on-deref-of-boxed-trait.stderr
index dc4bc5b5f44..6c3302f29c2 100644
--- a/tests/ui/typeck/issue-57673-ice-on-deref-of-boxed-trait.stderr
+++ b/tests/ui/typeck/issue-57673-ice-on-deref-of-boxed-trait.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-57673-ice-on-deref-of-boxed-trait.rs:5:5
    |
 LL | fn ice(x: Box<dyn Iterator<Item=()>>) {
-   |                                       - help: try adding a return type: `-> (dyn Iterator<Item = ()> + 'static)`
+   |                                      - help: try adding a return type: `-> (dyn Iterator<Item = ()> + 'static)`
 LL |     *x
    |     ^^ expected `()`, found `dyn Iterator`
    |
diff --git a/tests/ui/typeck/issue-90027-async-fn-return-suggestion.stderr b/tests/ui/typeck/issue-90027-async-fn-return-suggestion.stderr
index 0d72ae118f3..c46f4ec1ec3 100644
--- a/tests/ui/typeck/issue-90027-async-fn-return-suggestion.stderr
+++ b/tests/ui/typeck/issue-90027-async-fn-return-suggestion.stderr
@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-90027-async-fn-return-suggestion.rs:4:5
    |
 LL | async fn hello() {
-   |                  - help: try adding a return type: `-> i32`
+   |                 - help: try adding a return type: `-> i32`
 LL |     0
    |     ^ expected `()`, found integer
 
diff --git a/tests/ui/typeck/issue-91267.stderr b/tests/ui/typeck/issue-91267.stderr
index 72acd9c673b..7e48b251980 100644
--- a/tests/ui/typeck/issue-91267.stderr
+++ b/tests/ui/typeck/issue-91267.stderr
@@ -14,7 +14,7 @@ error[E0308]: mismatched types
   --> $DIR/issue-91267.rs:4:5
    |
 LL | fn main() {
-   |           - expected `()` because of default return type
+   |          - expected `()` because of default return type
 LL |     type_ascribe!(0, u8<e<5>=e>)
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `u8`
 
diff --git a/tests/ui/typeck/typeck-builtin-bound-type-parameters.stderr b/tests/ui/typeck/typeck-builtin-bound-type-parameters.stderr
index a3517af877c..67ca2b061f9 100644
--- a/tests/ui/typeck/typeck-builtin-bound-type-parameters.stderr
+++ b/tests/ui/typeck/typeck-builtin-bound-type-parameters.stderr
@@ -21,6 +21,8 @@ LL | trait Trait: Copy<dyn Send> {}
    |              ^^^^---------- help: remove these generics
    |              |
    |              expected 0 generic arguments
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
   --> $DIR/typeck-builtin-bound-type-parameters.rs:8:21
diff --git a/tests/ui/unknown-lint-tool-name.stderr b/tests/ui/unknown-lint-tool-name.stderr
index 5f8349ce6c3..72731ab1e3d 100644
--- a/tests/ui/unknown-lint-tool-name.stderr
+++ b/tests/ui/unknown-lint-tool-name.stderr
@@ -21,6 +21,7 @@ LL | #![deny(foo::bar)]
    |         ^^^
    |
    = help: add `#![register_tool(foo)]` to the crate root
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0710]: unknown tool name `foo` found in scoped lint: `foo::bar`
   --> $DIR/unknown-lint-tool-name.rs:4:9
@@ -29,6 +30,7 @@ LL | #[allow(foo::bar)]
    |         ^^^
    |
    = help: add `#![register_tool(foo)]` to the crate root
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/unknown-unstable-lints/deny-unstable-lint-command-line.stderr b/tests/ui/unknown-unstable-lints/deny-unstable-lint-command-line.stderr
index 32f8d2f45dc..f0450aea49a 100644
--- a/tests/ui/unknown-unstable-lints/deny-unstable-lint-command-line.stderr
+++ b/tests/ui/unknown-unstable-lints/deny-unstable-lint-command-line.stderr
@@ -8,11 +8,13 @@ error: unknown lint: `test_unstable_lint`
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `-Zcrate-attr="feature(test_unstable_lint)"` to the command-line options to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unknown lint: `test_unstable_lint`
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `-Zcrate-attr="feature(test_unstable_lint)"` to the command-line options to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/unknown-unstable-lints/deny-unstable-lint-inline.stderr b/tests/ui/unknown-unstable-lints/deny-unstable-lint-inline.stderr
index 2a2a9811bfb..20a36b28dc6 100644
--- a/tests/ui/unknown-unstable-lints/deny-unstable-lint-inline.stderr
+++ b/tests/ui/unknown-unstable-lints/deny-unstable-lint-inline.stderr
@@ -20,6 +20,7 @@ LL | #![allow(test_unstable_lint)]
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: unknown lint: `test_unstable_lint`
   --> $DIR/deny-unstable-lint-inline.rs:4:1
@@ -29,6 +30,7 @@ LL | #![allow(test_unstable_lint)]
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-command-line.stderr b/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-command-line.stderr
index dd9ecf02fa6..a2deecf1caf 100644
--- a/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-command-line.stderr
+++ b/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-command-line.stderr
@@ -8,11 +8,13 @@ warning: unknown lint: `test_unstable_lint`
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `-Zcrate-attr="feature(test_unstable_lint)"` to the command-line options to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `test_unstable_lint`
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `-Zcrate-attr="feature(test_unstable_lint)"` to the command-line options to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-inline.stderr b/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-inline.stderr
index 0548cd226d8..12afb2e294a 100644
--- a/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-inline.stderr
+++ b/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-inline.stderr
@@ -20,6 +20,7 @@ LL | #![allow(test_unstable_lint)]
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `test_unstable_lint`
   --> $DIR/warn-unknown-unstable-lint-inline.rs:4:1
@@ -29,6 +30,7 @@ LL | #![allow(test_unstable_lint)]
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: 3 warnings emitted
 
diff --git a/tests/ui/use/use-super-global-path.stderr b/tests/ui/use/use-super-global-path.stderr
index 7014a12e9dd..00d172f4799 100644
--- a/tests/ui/use/use-super-global-path.stderr
+++ b/tests/ui/use/use-super-global-path.stderr
@@ -9,6 +9,8 @@ error[E0433]: failed to resolve: global paths cannot start with `super`
    |
 LL |     use ::super::{S, Z};
    |           ^^^^^ global paths cannot start with `super`
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0433]: failed to resolve: global paths cannot start with `super`
   --> $DIR/use-super-global-path.rs:11:15
diff --git a/tests/ui/wf/wf-fn-where-clause.stderr b/tests/ui/wf/wf-fn-where-clause.stderr
index 2aec641e71e..cd6c051feed 100644
--- a/tests/ui/wf/wf-fn-where-clause.stderr
+++ b/tests/ui/wf/wf-fn-where-clause.stderr
@@ -14,6 +14,15 @@ help: consider further restricting type parameter `U`
 LL | fn foo<T,U>() where T: ExtraCopy<U>, U: std::marker::Copy
    |                                    ++++++++++++++++++++++
 
+error[E0038]: the trait `Copy` cannot be made into an object
+  --> $DIR/wf-fn-where-clause.rs:12:16
+   |
+LL | fn bar() where Vec<dyn Copy>:, {}
+   |                ^^^^^^^^^^^^^ `Copy` cannot be made into an object
+   |
+   = note: the trait cannot be made into an object because it requires `Self: Sized`
+   = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
+
 error[E0277]: the size for values of type `(dyn Copy + 'static)` cannot be known at compilation time
   --> $DIR/wf-fn-where-clause.rs:12:16
    |
@@ -34,15 +43,6 @@ LL | struct Vec<T> {
 LL |     t: T,
    |        - ...if indirection were used here: `Box<T>`
 
-error[E0038]: the trait `Copy` cannot be made into an object
-  --> $DIR/wf-fn-where-clause.rs:12:16
-   |
-LL | fn bar() where Vec<dyn Copy>:, {}
-   |                ^^^^^^^^^^^^^ `Copy` cannot be made into an object
-   |
-   = note: the trait cannot be made into an object because it requires `Self: Sized`
-   = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
-
 error: aborting due to 3 previous errors
 
 Some errors have detailed explanations: E0038, E0277.