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-rw-r--r--.gitignore2
-rw-r--r--compiler/rustc_codegen_cranelift/src/lib.rs2
-rw-r--r--compiler/rustc_codegen_gcc/src/lib.rs2
-rw-r--r--compiler/rustc_codegen_llvm/messages.ftl3
-rw-r--r--compiler/rustc_codegen_llvm/src/back/write.rs4
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs8
-rw-r--r--compiler/rustc_codegen_llvm/src/errors.rs5
-rw-r--r--compiler/rustc_codegen_ssa/src/back/linker.rs16
-rw-r--r--compiler/rustc_codegen_ssa/src/back/write.rs4
-rw-r--r--compiler/rustc_codegen_ssa/src/base.rs6
-rw-r--r--compiler/rustc_codegen_ssa/src/mir/rvalue.rs22
-rw-r--r--compiler/rustc_codegen_ssa/src/traits/builder.rs13
-rw-r--r--compiler/rustc_errors/src/emitter.rs25
-rw-r--r--compiler/rustc_errors/src/lib.rs30
-rw-r--r--compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs33
-rw-r--r--compiler/rustc_mir_transform/src/coverage/counters.rs8
-rw-r--r--compiler/rustc_mir_transform/src/coverage/query.rs19
-rw-r--r--compiler/rustc_mir_transform/src/inline.rs3
-rw-r--r--compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs51
-rw-r--r--compiler/rustc_next_trait_solver/src/solve/effect_goals.rs2
-rw-r--r--compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs254
-rw-r--r--compiler/rustc_next_trait_solver/src/solve/normalizes_to/opaque_types.rs28
-rw-r--r--compiler/rustc_resolve/src/late/diagnostics.rs23
-rw-r--r--compiler/rustc_session/src/config.rs26
-rw-r--r--compiler/rustc_span/src/analyze_source_file.rs187
-rw-r--r--compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs4
-rw-r--r--compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs2
-rw-r--r--compiler/rustc_trait_selection/src/solve/fulfill/derive_errors.rs128
-rw-r--r--compiler/rustc_trait_selection/src/solve/inspect/analyse.rs2
-rw-r--r--compiler/rustc_trait_selection/src/solve/select.rs3
-rw-r--r--compiler/rustc_trait_selection/src/traits/util.rs4
-rw-r--r--compiler/rustc_type_ir/src/solve/inspect.rs2
-rw-r--r--config.example.toml9
-rw-r--r--library/alloc/src/boxed.rs128
m---------library/backtrace0
-rw-r--r--library/core/src/ops/mod.rs2
-rw-r--r--library/core/src/ops/range.rs82
-rw-r--r--library/core/src/prelude/mod.rs14
-rw-r--r--library/core/src/prelude/v1.rs (renamed from library/core/src/prelude/common.rs)4
-rw-r--r--library/core/src/range.rs28
-rw-r--r--library/core/src/slice/iter/macros.rs2
-rw-r--r--library/std/src/io/util.rs28
-rw-r--r--library/std/src/lib.rs1
-rw-r--r--library/std/src/prelude/mod.rs14
-rw-r--r--library/std/src/prelude/v1.rs (renamed from library/std/src/prelude/common.rs)4
-rw-r--r--library/std/src/sys/pal/unix/sync/mutex.rs6
-rw-r--r--library/std/src/sys/pal/unix/thread.rs2
-rw-r--r--src/bootstrap/Cargo.lock12
-rw-r--r--src/bootstrap/Cargo.toml3
-rwxr-xr-xsrc/bootstrap/configure.py12
-rw-r--r--src/bootstrap/src/bin/main.rs16
-rw-r--r--src/bootstrap/src/core/build_steps/compile.rs9
-rw-r--r--src/bootstrap/src/core/build_steps/llvm.rs17
-rw-r--r--src/bootstrap/src/core/build_steps/test.rs29
-rw-r--r--src/bootstrap/src/core/builder/mod.rs2
-rw-r--r--src/bootstrap/src/core/config/config.rs23
-rw-r--r--src/bootstrap/src/lib.rs3
-rw-r--r--src/bootstrap/src/utils/change_tracker.rs5
-rw-r--r--src/bootstrap/src/utils/exec.rs22
-rw-r--r--src/bootstrap/src/utils/helpers.rs3
-rw-r--r--src/bootstrap/src/utils/tracing.rs17
-rw-r--r--src/ci/github-actions/jobs.yml8
-rw-r--r--src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md8
-rw-r--r--src/doc/rustc/src/codegen-options/index.md2
-rw-r--r--src/doc/rustc/src/command-line-arguments.md2
-rw-r--r--src/librustdoc/html/static/css/rustdoc.css43
-rw-r--r--src/librustdoc/html/static/js/scrape-examples.js12
-rw-r--r--src/tools/clippy/tests/ui/implicit_return.stderr42
-rw-r--r--src/tools/clippy/tests/ui/legacy_numeric_constants.stderr5
-rw-r--r--src/tools/run-make-support/src/external_deps/rustc.rs2
-rw-r--r--tests/codegen/enum/enum-debug-niche-2.rs4
-rw-r--r--tests/codegen/intrinsics/transmute-niched.rs29
-rw-r--r--tests/codegen/intrinsics/transmute.rs8
-rw-r--r--tests/codegen/slice-iter-len-eq-zero.rs36
-rw-r--r--tests/coverage/assert_not.cov-map12
-rw-r--r--tests/coverage/async2.cov-map12
-rw-r--r--tests/coverage/bad_counter_ids.cov-map18
-rw-r--r--tests/coverage/conditions.cov-map321
-rw-r--r--tests/coverage/drop_trait.cov-map6
-rw-r--r--tests/coverage/generics.cov-map6
-rw-r--r--tests/coverage/loops_branches.cov-map34
-rw-r--r--tests/coverage/try_error_result.cov-map24
-rw-r--r--tests/coverage/while.cov-map6
-rw-r--r--tests/crashes/134905.rs16
-rw-r--r--tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-abort.mir58
-rw-r--r--tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-unwind.mir58
-rw-r--r--tests/run-make/rustc-help/help-v.stdout2
-rw-r--r--tests/run-make/rustc-help/help.stdout2
-rw-r--r--tests/rustdoc-gui/scrape-examples-button-focus.goml26
-rw-r--r--tests/rustdoc-js-std/vec-new.js2
-rw-r--r--tests/ui/associated-consts/associated-const-in-trait.rs1
-rw-r--r--tests/ui/associated-consts/associated-const-in-trait.stderr18
-rw-r--r--tests/ui/associated-consts/wrong-projection-self-ty-invalid-bivariant-arg2.stderr24
-rw-r--r--tests/ui/associated-types/defaults-suitability.current.stderr5
-rw-r--r--tests/ui/associated-types/defaults-suitability.next.stderr5
-rw-r--r--tests/ui/associated-types/hr-associated-type-bound-object.rs1
-rw-r--r--tests/ui/associated-types/hr-associated-type-bound-object.stderr21
-rw-r--r--tests/ui/associated-types/hr-associated-type-bound-param-2.rs1
-rw-r--r--tests/ui/associated-types/hr-associated-type-bound-param-2.stderr22
-rw-r--r--tests/ui/associated-types/issue-38821.stderr10
-rw-r--r--tests/ui/associated-types/issue-54108.current.stderr5
-rw-r--r--tests/ui/associated-types/issue-54108.next.stderr5
-rw-r--r--tests/ui/attributes/rustc_confusables.stderr5
-rw-r--r--tests/ui/attributes/rustc_confusables_std_cases.stderr10
-rw-r--r--tests/ui/auto-traits/assoc-ty.next.stderr25
-rw-r--r--tests/ui/auto-traits/assoc-ty.rs4
-rw-r--r--tests/ui/borrowck/issue-115259-suggest-iter-mut.stderr5
-rw-r--r--tests/ui/borrowck/issue-62387-suggest-iter-mut-2.stderr5
-rw-r--r--tests/ui/borrowck/issue-62387-suggest-iter-mut.stderr10
-rw-r--r--tests/ui/c-variadic/issue-86053-1.stderr5
-rw-r--r--tests/ui/cfg/cfg-method-receiver.stderr5
-rw-r--r--tests/ui/check-cfg/diagnotics.cargo.stderr5
-rw-r--r--tests/ui/check-cfg/diagnotics.rustc.stderr5
-rw-r--r--tests/ui/closures/2229_closure_analysis/bad-pattern.stderr5
-rw-r--r--tests/ui/closures/2229_closure_analysis/issue-118144.stderr5
-rw-r--r--tests/ui/closures/issue-78720.stderr5
-rw-r--r--tests/ui/compare-method/bad-self-type.stderr5
-rw-r--r--tests/ui/const-generics/defaults/doesnt_infer.stderr24
-rw-r--r--tests/ui/const-generics/ensure_is_evaluatable.stderr5
-rw-r--r--tests/ui/const-generics/fn_with_two_const_inputs.stderr5
-rw-r--r--tests/ui/const-generics/generic_arg_infer/issue-91614.stderr8
-rw-r--r--tests/ui/const-generics/generic_const_exprs/abstract-const-as-cast-3.stderr20
-rw-r--r--tests/ui/const-generics/generic_const_exprs/assoc_const_unification/doesnt_unify_evaluatable.stderr5
-rw-r--r--tests/ui/const-generics/generic_const_exprs/const_kind_expr/issue_114151.stderr5
-rw-r--r--tests/ui/const-generics/generic_const_exprs/const_kind_expr/wf_obligation.stderr5
-rw-r--r--tests/ui/const-generics/generic_const_exprs/expected-type-of-closure-body-to-be-a-closure-or-coroutine-ice-113776.stderr5
-rw-r--r--tests/ui/const-generics/generic_const_exprs/issue-62504.full.stderr24
-rw-r--r--tests/ui/const-generics/generic_const_exprs/issue-62504.min.stderr24
-rw-r--r--tests/ui/const-generics/generic_const_exprs/issue-80742.stderr2
-rw-r--r--tests/ui/consts/const-needs_drop-monomorphic.stderr18
-rw-r--r--tests/ui/consts/const-pattern-irrefutable.stderr15
-rw-r--r--tests/ui/delegation/correct_body_owner_parent_found_in_diagnostics.stderr18
-rw-r--r--tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr5
-rw-r--r--tests/ui/dropck/explicit-drop-bounds.bad1.stderr10
-rw-r--r--tests/ui/dst/issue-90528-unsizing-suggestion-3.stderr5
-rw-r--r--tests/ui/dyn-compatibility/assoc_type_bounds_sized_used.stderr28
-rw-r--r--tests/ui/empty/empty-struct-braces-expr.stderr15
-rw-r--r--tests/ui/empty/empty-struct-tuple-pat.stderr5
-rw-r--r--tests/ui/env-macro/error-recovery-issue-55897.stderr5
-rw-r--r--tests/ui/error-codes/E0027.stderr15
-rw-r--r--tests/ui/extern/not-in-block.stderr10
-rw-r--r--tests/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr5
-rw-r--r--tests/ui/fmt/no-inline-literals-out-of-range.stderr5
-rw-r--r--tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.next.stderr14
-rw-r--r--tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.rs8
-rw-r--r--tests/ui/impl-trait/issues/issue-62742.stderr42
-rw-r--r--tests/ui/impl-trait/no-method-suggested-traits.stderr30
-rw-r--r--tests/ui/imports/glob-resolve1.stderr5
-rw-r--r--tests/ui/imports/issue-45829/import-self.stderr5
-rw-r--r--tests/ui/imports/suggest-import-issue-120074.edition2015.stderr5
-rw-r--r--tests/ui/imports/suggest-import-issue-120074.edition2021.stderr5
-rw-r--r--tests/ui/inference/need_type_info/type-alias.stderr4
-rw-r--r--tests/ui/issues/issue-32004.stderr5
-rw-r--r--tests/ui/issues/issue-41652/issue-41652.stderr5
-rw-r--r--tests/ui/issues/issue-51874.stderr5
-rw-r--r--tests/ui/issues/issue-5358-1.stderr5
-rw-r--r--tests/ui/issues/issue-56175.stderr5
-rw-r--r--tests/ui/issues/issue-57741-dereference-boxed-value/issue-57741.stderr20
-rw-r--r--tests/ui/issues/issue-58734.rs1
-rw-r--r--tests/ui/issues/issue-58734.stderr30
-rw-r--r--tests/ui/let-else/let-else-deref-coercion.stderr10
-rw-r--r--tests/ui/lexer/lex-bad-char-literals-1.stderr5
-rw-r--r--tests/ui/lifetimes/borrowck-let-suggestion.stderr5
-rw-r--r--tests/ui/lint/let_underscore/issue-119696-err-on-fn.stderr5
-rw-r--r--tests/ui/lint/let_underscore/issue-119697-extra-let.stderr5
-rw-r--r--tests/ui/lint/let_underscore/let_underscore_drop.stderr5
-rw-r--r--tests/ui/lint/let_underscore/let_underscore_lock.stderr20
-rw-r--r--tests/ui/lint/lint-strict-provenance-lossy-casts.stderr5
-rw-r--r--tests/ui/lint/static-mut-refs.e2021.stderr30
-rw-r--r--tests/ui/lint/static-mut-refs.e2024.stderr30
-rw-r--r--tests/ui/lint/type-overflow.stderr10
-rw-r--r--tests/ui/lint/unused/issue-67691-unused-field-in-or-pattern.stderr10
-rw-r--r--tests/ui/lint/wide_pointer_comparisons.stderr5
-rw-r--r--tests/ui/macros/expr_2021_cargo_fix_edition.stderr10
-rw-r--r--tests/ui/macros/macro-backtrace-invalid-internals.stderr10
-rw-r--r--tests/ui/match/issue-56685.stderr20
-rw-r--r--tests/ui/methods/inherent-bound-in-probe.stderr13
-rw-r--r--tests/ui/methods/issues/issue-90315.stderr5
-rw-r--r--tests/ui/methods/method-on-ambiguous-numeric-type.stderr5
-rw-r--r--tests/ui/mir/issue-112269.stderr10
-rw-r--r--tests/ui/mismatched_types/issue-112036.stderr5
-rw-r--r--tests/ui/moves/use_of_moved_value_copy_suggestions.stderr5
-rw-r--r--tests/ui/namespace/namespace-mix.stderr20
-rw-r--r--tests/ui/nll/ty-outlives/projection-no-regions-closure.stderr10
-rw-r--r--tests/ui/nll/ty-outlives/projection-no-regions-fn.stderr10
-rw-r--r--tests/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr10
-rw-r--r--tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.stderr5
-rw-r--r--tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.stderr5
-rw-r--r--tests/ui/object-pointer-types.stderr5
-rw-r--r--tests/ui/parser/bad-char-literals.stderr5
-rw-r--r--tests/ui/parser/bad-escape-suggest-raw-string.stderr5
-rw-r--r--tests/ui/parser/byte-literals.stderr5
-rw-r--r--tests/ui/parser/char/whitespace-character-literal.stderr5
-rw-r--r--tests/ui/parser/extern-no-fn.stderr5
-rw-r--r--tests/ui/parser/issues/issue-65257-invalid-var-decl-recovery.stderr10
-rw-r--r--tests/ui/parser/issues/issue-87086-colon-path-sep.stderr45
-rw-r--r--tests/ui/parser/missing-fn-issue-65381-2.stderr5
-rw-r--r--tests/ui/parser/misspelled-keywords/const.stderr5
-rw-r--r--tests/ui/parser/recover/turbofish-arg-with-stray-colon.stderr5
-rw-r--r--tests/ui/parser/type-ascription-in-pattern.stderr10
-rw-r--r--tests/ui/parser/use-colon-as-mod-sep.stderr20
-rw-r--r--tests/ui/pattern/pat-tuple-field-count-cross.stderr5
-rw-r--r--tests/ui/pattern/pat-tuple-overfield.stderr5
-rw-r--r--tests/ui/pattern/patkind-ref-binding-issue-114896.stderr5
-rw-r--r--tests/ui/pattern/patkind-ref-binding-issue-122415.stderr5
-rw-r--r--tests/ui/pattern/usefulness/doc-hidden-fields.stderr45
-rw-r--r--tests/ui/pattern/usefulness/stable-gated-fields.stderr15
-rw-r--r--tests/ui/privacy/privacy5.stderr50
-rw-r--r--tests/ui/privacy/suggest-box-new.stderr10
-rw-r--r--tests/ui/pub/pub-ident-fn-or-struct.stderr5
-rw-r--r--tests/ui/pub/pub-restricted.stderr25
-rw-r--r--tests/ui/resolve/const-with-typo-in-pattern-binding.stderr5
-rw-r--r--tests/ui/resolve/issue-39226.stderr5
-rw-r--r--tests/ui/resolve/issue-55673.stderr5
-rw-r--r--tests/ui/resolve/issue-73427.stderr35
-rw-r--r--tests/ui/resolve/privacy-enum-ctor.stderr5
-rw-r--r--tests/ui/resolve/resolve-inconsistent-names.stderr10
-rw-r--r--tests/ui/resolve/resolve-issue-135614-assoc-const.import_trait_associated_functions.stderr5
-rw-r--r--tests/ui/resolve/resolve-issue-135614-assoc-const.normal.stderr5
-rw-r--r--tests/ui/resolve/typo-suggestion-for-variable-with-name-similar-to-struct-field.stderr5
-rw-r--r--tests/ui/resolve/typo-suggestion-mistyped-in-path.stderr5
-rw-r--r--tests/ui/rfcs/rfc-2008-non-exhaustive/struct.stderr15
-rw-r--r--tests/ui/rfcs/rfc-2008-non-exhaustive/variant.stderr10
-rw-r--r--tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.stderr5
-rw-r--r--tests/ui/rust-2018/trait-import-suggestions.stderr5
-rw-r--r--tests/ui/specialization/fuzzed/fuzzing-ice-134905.rs22
-rw-r--r--tests/ui/specialization/fuzzed/fuzzing-ice-134905.stderr40
-rw-r--r--tests/ui/stability-attribute/const-stability-attribute-implies-using-stable.stderr5
-rw-r--r--tests/ui/stability-attribute/const-stability-attribute-implies-using-unstable.stderr5
-rw-r--r--tests/ui/stability-attribute/stability-attribute-implies-using-stable.stderr5
-rw-r--r--tests/ui/stability-attribute/stability-attribute-implies-using-unstable.stderr5
-rw-r--r--tests/ui/statics/issue-15261.stderr5
-rw-r--r--tests/ui/statics/static-mut-shared-parens.stderr5
-rw-r--r--tests/ui/statics/static-mut-xc.stderr5
-rw-r--r--tests/ui/statics/static-recursive.stderr5
-rw-r--r--tests/ui/structs-enums/multiple-reprs.rs12
-rw-r--r--tests/ui/structs/struct-fields-hints-no-dupe.stderr5
-rw-r--r--tests/ui/structs/struct-pat-derived-error.stderr15
-rw-r--r--tests/ui/structs/struct-tuple-field-names.stderr15
-rw-r--r--tests/ui/structs/suggest-replacing-field-when-specifying-same-type.stderr60
-rw-r--r--tests/ui/suggestions/bound-suggestions.stderr5
-rw-r--r--tests/ui/suggestions/const-pat-non-exaustive-let-new-var.stderr5
-rw-r--r--tests/ui/suggestions/crate-or-module-typo.stderr10
-rw-r--r--tests/ui/suggestions/dyn-incompatible-trait-should-use-where-sized.stderr5
-rw-r--r--tests/ui/suggestions/field-access.stderr15
-rw-r--r--tests/ui/suggestions/imm-ref-trait-object-literal.stderr5
-rw-r--r--tests/ui/suggestions/impl-trait-missing-lifetime-gated.stderr20
-rw-r--r--tests/ui/suggestions/let-binding-suggest-issue-133713.fixed12
-rw-r--r--tests/ui/suggestions/let-binding-suggest-issue-133713.rs12
-rw-r--r--tests/ui/suggestions/let-binding-suggest-issue-133713.stderr27
-rw-r--r--tests/ui/suggestions/recover-missing-turbofish-surrounding-angle-braket.stderr5
-rw-r--r--tests/ui/suggestions/struct-field-type-including-single-colon.stderr10
-rw-r--r--tests/ui/suggestions/suggest-change-mut.stderr5
-rw-r--r--tests/ui/suggestions/suggest-deref-in-match-issue-132784.stderr50
-rw-r--r--tests/ui/suggestions/suggest-methods.stderr5
-rw-r--r--tests/ui/suggestions/suggest-variants.stderr10
-rw-r--r--tests/ui/suggestions/type-ascription-instead-of-path-2.stderr5
-rw-r--r--tests/ui/suggestions/type-ascription-instead-of-path-in-type.stderr5
-rw-r--r--tests/ui/suggestions/type-mismatch-byte-literal.stderr15
-rw-r--r--tests/ui/test-attrs/inaccessible-test-modules.stderr5
-rw-r--r--tests/ui/traits/alias/expand-higher-ranked-alias.rs18
-rw-r--r--tests/ui/traits/associated_type_bound/assoc_type_bound_with_struct.stderr20
-rw-r--r--tests/ui/traits/item-privacy.rs9
-rw-r--r--tests/ui/traits/item-privacy.stderr66
-rw-r--r--tests/ui/traits/next-solver/method/path_lookup_wf_constraints.rs39
-rw-r--r--tests/ui/traits/non_lifetime_binders/type-match-with-late-bound.stderr15
-rw-r--r--tests/ui/transmutability/assoc-bound.stderr5
-rw-r--r--tests/ui/type-alias-impl-trait/constrain_in_projection.current.stderr11
-rw-r--r--tests/ui/type-alias-impl-trait/constrain_in_projection.rs1
-rw-r--r--tests/ui/type-alias-impl-trait/constrain_in_projection2.current.stderr12
-rw-r--r--tests/ui/type-alias-impl-trait/constrain_in_projection2.rs1
-rw-r--r--tests/ui/type/issue-100584.stderr10
-rw-r--r--tests/ui/type/pattern_types/pattern_type_mismatch.stderr10
-rw-r--r--tests/ui/typeck/issue-29181.stderr5
-rw-r--r--tests/ui/typeck/method-chain-gats.stderr5
-rw-r--r--tests/ui/typeck/mismatched-map-under-self.stderr5
-rw-r--r--tests/ui/unresolved/unresolved-candidates.stderr5
277 files changed, 2343 insertions, 1971 deletions
diff --git a/.gitignore b/.gitignore
index ddc8dad95e8..2184e04f16b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,6 +54,8 @@ no_llvm_build
 /library/target
 /src/bootstrap/target
 /src/tools/x/target
+# Created by `x vendor`
+/vendor
 # Created by default with `src/ci/docker/run.sh`
 /obj/
 # Created by nix dev shell / .envrc
diff --git a/compiler/rustc_codegen_cranelift/src/lib.rs b/compiler/rustc_codegen_cranelift/src/lib.rs
index b0153419903..a3f43744875 100644
--- a/compiler/rustc_codegen_cranelift/src/lib.rs
+++ b/compiler/rustc_codegen_cranelift/src/lib.rs
@@ -289,7 +289,7 @@ fn build_isa(sess: &Session) -> Arc<dyn TargetIsa + 'static> {
             flags_builder.set("opt_level", "none").unwrap();
         }
         OptLevel::Less
-        | OptLevel::Default
+        | OptLevel::More
         | OptLevel::Size
         | OptLevel::SizeMin
         | OptLevel::Aggressive => {
diff --git a/compiler/rustc_codegen_gcc/src/lib.rs b/compiler/rustc_codegen_gcc/src/lib.rs
index ce88ac39021..6455bcec685 100644
--- a/compiler/rustc_codegen_gcc/src/lib.rs
+++ b/compiler/rustc_codegen_gcc/src/lib.rs
@@ -476,7 +476,7 @@ fn to_gcc_opt_level(optlevel: Option<OptLevel>) -> OptimizationLevel {
         Some(level) => match level {
             OptLevel::No => OptimizationLevel::None,
             OptLevel::Less => OptimizationLevel::Limited,
-            OptLevel::Default => OptimizationLevel::Standard,
+            OptLevel::More => OptimizationLevel::Standard,
             OptLevel::Aggressive => OptimizationLevel::Aggressive,
             OptLevel::Size | OptLevel::SizeMin => OptimizationLevel::Limited,
         },
diff --git a/compiler/rustc_codegen_llvm/messages.ftl b/compiler/rustc_codegen_llvm/messages.ftl
index 9585848cbf0..399d7ffea8e 100644
--- a/compiler/rustc_codegen_llvm/messages.ftl
+++ b/compiler/rustc_codegen_llvm/messages.ftl
@@ -38,9 +38,6 @@ codegen_llvm_lto_proc_macro = lto cannot be used for `proc-macro` crate type wit
 codegen_llvm_mismatch_data_layout =
     data-layout for target `{$rustc_target}`, `{$rustc_layout}`, differs from LLVM target's `{$llvm_target}` default layout, `{$llvm_layout}`
 
-codegen_llvm_multiple_source_dicompileunit = multiple source DICompileUnits found
-codegen_llvm_multiple_source_dicompileunit_with_llvm_err = multiple source DICompileUnits found: {$llvm_err}
-
 codegen_llvm_parse_bitcode = failed to parse bitcode for LTO module
 codegen_llvm_parse_bitcode_with_llvm_err = failed to parse bitcode for LTO module: {$llvm_err}
 
diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs
index 58933a77e53..9fa10e96068 100644
--- a/compiler/rustc_codegen_llvm/src/back/write.rs
+++ b/compiler/rustc_codegen_llvm/src/back/write.rs
@@ -141,7 +141,7 @@ fn to_llvm_opt_settings(cfg: config::OptLevel) -> (llvm::CodeGenOptLevel, llvm::
     match cfg {
         No => (llvm::CodeGenOptLevel::None, llvm::CodeGenOptSizeNone),
         Less => (llvm::CodeGenOptLevel::Less, llvm::CodeGenOptSizeNone),
-        Default => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeNone),
+        More => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeNone),
         Aggressive => (llvm::CodeGenOptLevel::Aggressive, llvm::CodeGenOptSizeNone),
         Size => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeDefault),
         SizeMin => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeAggressive),
@@ -153,7 +153,7 @@ fn to_pass_builder_opt_level(cfg: config::OptLevel) -> llvm::PassBuilderOptLevel
     match cfg {
         No => llvm::PassBuilderOptLevel::O0,
         Less => llvm::PassBuilderOptLevel::O1,
-        Default => llvm::PassBuilderOptLevel::O2,
+        More => llvm::PassBuilderOptLevel::O2,
         Aggressive => llvm::PassBuilderOptLevel::O3,
         Size => llvm::PassBuilderOptLevel::Os,
         SizeMin => llvm::PassBuilderOptLevel::Oz,
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs b/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs
index 11824398f24..187d97c54c8 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs
@@ -437,6 +437,12 @@ fn build_enum_variant_member_di_node<'ll, 'tcx>(
         .source_info
         .unwrap_or_else(|| (unknown_file_metadata(cx), UNKNOWN_LINE_NUMBER));
 
+    let discr = discr_value.opt_single_val().map(|value| {
+        let tag_base_type = tag_base_type(cx.tcx, enum_type_and_layout);
+        let size = cx.size_of(tag_base_type);
+        cx.const_uint_big(cx.type_ix(size.bits()), value)
+    });
+
     unsafe {
         llvm::LLVMRustDIBuilderCreateVariantMemberType(
             DIB(cx),
@@ -448,7 +454,7 @@ fn build_enum_variant_member_di_node<'ll, 'tcx>(
             enum_type_and_layout.size.bits(),
             enum_type_and_layout.align.abi.bits() as u32,
             Size::ZERO.bits(),
-            discr_value.opt_single_val().map(|value| cx.const_u128(value)),
+            discr,
             DIFlags::FlagZero,
             variant_member_info.variant_struct_type_di_node,
         )
diff --git a/compiler/rustc_codegen_llvm/src/errors.rs b/compiler/rustc_codegen_llvm/src/errors.rs
index f4c9491f758..97f49256165 100644
--- a/compiler/rustc_codegen_llvm/src/errors.rs
+++ b/compiler/rustc_codegen_llvm/src/errors.rs
@@ -131,8 +131,6 @@ pub enum LlvmError<'a> {
     LoadBitcode { name: CString },
     #[diag(codegen_llvm_write_thinlto_key)]
     WriteThinLtoKey { err: std::io::Error },
-    #[diag(codegen_llvm_multiple_source_dicompileunit)]
-    MultipleSourceDiCompileUnit,
     #[diag(codegen_llvm_prepare_thin_lto_module)]
     PrepareThinLtoModule,
     #[diag(codegen_llvm_parse_bitcode)]
@@ -155,9 +153,6 @@ impl<G: EmissionGuarantee> Diagnostic<'_, G> for WithLlvmError<'_> {
             PrepareThinLtoContext => fluent::codegen_llvm_prepare_thin_lto_context_with_llvm_err,
             LoadBitcode { .. } => fluent::codegen_llvm_load_bitcode_with_llvm_err,
             WriteThinLtoKey { .. } => fluent::codegen_llvm_write_thinlto_key_with_llvm_err,
-            MultipleSourceDiCompileUnit => {
-                fluent::codegen_llvm_multiple_source_dicompileunit_with_llvm_err
-            }
             PrepareThinLtoModule => fluent::codegen_llvm_prepare_thin_lto_module_with_llvm_err,
             ParseBitcode => fluent::codegen_llvm_parse_bitcode_with_llvm_err,
             PrepareAutoDiff { .. } => fluent::codegen_llvm_prepare_autodiff_with_llvm_err,
diff --git a/compiler/rustc_codegen_ssa/src/back/linker.rs b/compiler/rustc_codegen_ssa/src/back/linker.rs
index 8fb831471a9..05d6ff35751 100644
--- a/compiler/rustc_codegen_ssa/src/back/linker.rs
+++ b/compiler/rustc_codegen_ssa/src/back/linker.rs
@@ -410,7 +410,7 @@ impl<'a> GccLinker<'a> {
         let opt_level = match self.sess.opts.optimize {
             config::OptLevel::No => "O0",
             config::OptLevel::Less => "O1",
-            config::OptLevel::Default | config::OptLevel::Size | config::OptLevel::SizeMin => "O2",
+            config::OptLevel::More | config::OptLevel::Size | config::OptLevel::SizeMin => "O2",
             config::OptLevel::Aggressive => "O3",
         };
 
@@ -685,7 +685,7 @@ impl<'a> Linker for GccLinker<'a> {
 
         // GNU-style linkers support optimization with -O. GNU ld doesn't
         // need a numeric argument, but other linkers do.
-        if self.sess.opts.optimize == config::OptLevel::Default
+        if self.sess.opts.optimize == config::OptLevel::More
             || self.sess.opts.optimize == config::OptLevel::Aggressive
         {
             self.link_arg("-O1");
@@ -1213,7 +1213,7 @@ impl<'a> Linker for EmLinker<'a> {
         self.cc_arg(match self.sess.opts.optimize {
             OptLevel::No => "-O0",
             OptLevel::Less => "-O1",
-            OptLevel::Default => "-O2",
+            OptLevel::More => "-O2",
             OptLevel::Aggressive => "-O3",
             OptLevel::Size => "-Os",
             OptLevel::SizeMin => "-Oz",
@@ -1384,7 +1384,7 @@ impl<'a> Linker for WasmLd<'a> {
         self.link_arg(match self.sess.opts.optimize {
             OptLevel::No => "-O0",
             OptLevel::Less => "-O1",
-            OptLevel::Default => "-O2",
+            OptLevel::More => "-O2",
             OptLevel::Aggressive => "-O3",
             // Currently LLD doesn't support `Os` and `Oz`, so pass through `O2`
             // instead.
@@ -1451,7 +1451,7 @@ impl<'a> WasmLd<'a> {
         let opt_level = match self.sess.opts.optimize {
             config::OptLevel::No => "O0",
             config::OptLevel::Less => "O1",
-            config::OptLevel::Default => "O2",
+            config::OptLevel::More => "O2",
             config::OptLevel::Aggressive => "O3",
             // wasm-ld only handles integer LTO opt levels. Use O2
             config::OptLevel::Size | config::OptLevel::SizeMin => "O2",
@@ -1525,7 +1525,7 @@ impl<'a> Linker for L4Bender<'a> {
     fn optimize(&mut self) {
         // GNU-style linkers support optimization with -O. GNU ld doesn't
         // need a numeric argument, but other linkers do.
-        if self.sess.opts.optimize == config::OptLevel::Default
+        if self.sess.opts.optimize == config::OptLevel::More
             || self.sess.opts.optimize == config::OptLevel::Aggressive
         {
             self.link_arg("-O1");
@@ -1929,7 +1929,7 @@ impl<'a> Linker for LlbcLinker<'a> {
         match self.sess.opts.optimize {
             OptLevel::No => "-O0",
             OptLevel::Less => "-O1",
-            OptLevel::Default => "-O2",
+            OptLevel::More => "-O2",
             OptLevel::Aggressive => "-O3",
             OptLevel::Size => "-Os",
             OptLevel::SizeMin => "-Oz",
@@ -2006,7 +2006,7 @@ impl<'a> Linker for BpfLinker<'a> {
         self.link_arg(match self.sess.opts.optimize {
             OptLevel::No => "-O0",
             OptLevel::Less => "-O1",
-            OptLevel::Default => "-O2",
+            OptLevel::More => "-O2",
             OptLevel::Aggressive => "-O3",
             OptLevel::Size => "-Os",
             OptLevel::SizeMin => "-Oz",
diff --git a/compiler/rustc_codegen_ssa/src/back/write.rs b/compiler/rustc_codegen_ssa/src/back/write.rs
index ce2161a07eb..f029c08a808 100644
--- a/compiler/rustc_codegen_ssa/src/back/write.rs
+++ b/compiler/rustc_codegen_ssa/src/back/write.rs
@@ -236,7 +236,7 @@ impl ModuleConfig {
             // Copy what clang does by turning on loop vectorization at O2 and
             // slp vectorization at O3.
             vectorize_loop: !sess.opts.cg.no_vectorize_loops
-                && (sess.opts.optimize == config::OptLevel::Default
+                && (sess.opts.optimize == config::OptLevel::More
                     || sess.opts.optimize == config::OptLevel::Aggressive),
             vectorize_slp: !sess.opts.cg.no_vectorize_slp
                 && sess.opts.optimize == config::OptLevel::Aggressive,
@@ -260,7 +260,7 @@ impl ModuleConfig {
                 MergeFunctions::Trampolines | MergeFunctions::Aliases => {
                     use config::OptLevel::*;
                     match sess.opts.optimize {
-                        Aggressive | Default | SizeMin | Size => true,
+                        Aggressive | More | SizeMin | Size => true,
                         Less | No => false,
                     }
                 }
diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs
index d9fbf539fd3..e800492dad0 100644
--- a/compiler/rustc_codegen_ssa/src/base.rs
+++ b/compiler/rustc_codegen_ssa/src/base.rs
@@ -1054,12 +1054,12 @@ pub(crate) fn provide(providers: &mut Providers) {
             config::OptLevel::No => return config::OptLevel::No,
             // If globally optimise-speed is already specified, just use that level.
             config::OptLevel::Less => return config::OptLevel::Less,
-            config::OptLevel::Default => return config::OptLevel::Default,
+            config::OptLevel::More => return config::OptLevel::More,
             config::OptLevel::Aggressive => return config::OptLevel::Aggressive,
             // If globally optimize-for-size has been requested, use -O2 instead (if optimize(size)
             // are present).
-            config::OptLevel::Size => config::OptLevel::Default,
-            config::OptLevel::SizeMin => config::OptLevel::Default,
+            config::OptLevel::Size => config::OptLevel::More,
+            config::OptLevel::SizeMin => config::OptLevel::More,
         };
 
         let defids = tcx.collect_and_partition_mono_items(cratenum).all_mono_items;
diff --git a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
index 3b7fefee80a..4c5b183cfe9 100644
--- a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
@@ -435,18 +435,22 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         scalar: abi::Scalar,
         backend_ty: Bx::Type,
     ) {
-        if matches!(self.cx.sess().opts.optimize, OptLevel::No)
-            // For now, the critical niches are all over `Int`eger values.
-            // Should floating-point values or pointers ever get more complex
-            // niches, then this code will probably want to handle them too.
-            || !matches!(scalar.primitive(), abi::Primitive::Int(..))
-            || scalar.is_always_valid(self.cx)
-        {
+        if matches!(self.cx.sess().opts.optimize, OptLevel::No) || scalar.is_always_valid(self.cx) {
             return;
         }
 
-        let range = scalar.valid_range(self.cx);
-        bx.assume_integer_range(imm, backend_ty, range);
+        match scalar.primitive() {
+            abi::Primitive::Int(..) => {
+                let range = scalar.valid_range(self.cx);
+                bx.assume_integer_range(imm, backend_ty, range);
+            }
+            abi::Primitive::Pointer(abi::AddressSpace::DATA)
+                if !scalar.valid_range(self.cx).contains(0) =>
+            {
+                bx.assume_nonnull(imm);
+            }
+            abi::Primitive::Pointer(..) | abi::Primitive::Float(..) => {}
+        }
     }
 
     pub(crate) fn codegen_rvalue_unsized(
diff --git a/compiler/rustc_codegen_ssa/src/traits/builder.rs b/compiler/rustc_codegen_ssa/src/traits/builder.rs
index b7dcf16fa2b..d9bb5ae773e 100644
--- a/compiler/rustc_codegen_ssa/src/traits/builder.rs
+++ b/compiler/rustc_codegen_ssa/src/traits/builder.rs
@@ -243,6 +243,19 @@ pub trait BuilderMethods<'a, 'tcx>:
         self.assume(cmp);
     }
 
+    /// Emits an `assume` that the `val` of pointer type is non-null.
+    ///
+    /// You may want to check the optimization level before bothering calling this.
+    fn assume_nonnull(&mut self, val: Self::Value) {
+        // Arguably in LLVM it'd be better to emit an assume operand bundle instead
+        // <https://llvm.org/docs/LangRef.html#assume-operand-bundles>
+        // but this works fine for all backends.
+
+        let null = self.const_null(self.type_ptr());
+        let is_null = self.icmp(IntPredicate::IntNE, val, null);
+        self.assume(is_null);
+    }
+
     fn range_metadata(&mut self, load: Self::Value, range: WrappingRange);
     fn nonnull_metadata(&mut self, load: Self::Value);
 
diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs
index 4824dc098ad..634afacf539 100644
--- a/compiler/rustc_errors/src/emitter.rs
+++ b/compiler/rustc_errors/src/emitter.rs
@@ -1976,13 +1976,16 @@ impl HumanEmitter {
             Some(Style::HeaderMsg),
         );
 
+        let other_suggestions = suggestions.len().saturating_sub(MAX_SUGGESTIONS);
+
         let mut row_num = 2;
         for (i, (complete, parts, highlights, _)) in
-            suggestions.iter().enumerate().take(MAX_SUGGESTIONS)
+            suggestions.into_iter().enumerate().take(MAX_SUGGESTIONS)
         {
             debug!(?complete, ?parts, ?highlights);
 
-            let has_deletion = parts.iter().any(|p| p.is_deletion(sm) || p.is_replacement(sm));
+            let has_deletion =
+                parts.iter().any(|p| p.is_deletion(sm) || p.is_destructive_replacement(sm));
             let is_multiline = complete.lines().count() > 1;
 
             if i == 0 {
@@ -2167,7 +2170,7 @@ impl HumanEmitter {
                 self.draw_code_line(
                     &mut buffer,
                     &mut row_num,
-                    highlight_parts,
+                    &highlight_parts,
                     line_pos + line_start,
                     line,
                     show_code_change,
@@ -2213,7 +2216,12 @@ impl HumanEmitter {
             if let DisplaySuggestion::Diff | DisplaySuggestion::Underline | DisplaySuggestion::Add =
                 show_code_change
             {
-                for part in parts {
+                for mut part in parts {
+                    // If this is a replacement of, e.g. `"a"` into `"ab"`, adjust the
+                    // suggestion and snippet to look as if we just suggested to add
+                    // `"b"`, which is typically much easier for the user to understand.
+                    part.trim_trivial_replacements(sm);
+
                     let snippet = if let Ok(snippet) = sm.span_to_snippet(part.span) {
                         snippet
                     } else {
@@ -2376,9 +2384,12 @@ impl HumanEmitter {
                 row_num = row + 1;
             }
         }
-        if suggestions.len() > MAX_SUGGESTIONS {
-            let others = suggestions.len() - MAX_SUGGESTIONS;
-            let msg = format!("and {} other candidate{}", others, pluralize!(others));
+        if other_suggestions > 0 {
+            let msg = format!(
+                "and {} other candidate{}",
+                other_suggestions,
+                pluralize!(other_suggestions)
+            );
             buffer.puts(row_num, max_line_num_len + 3, &msg, Style::NoStyle);
         }
 
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index 9af17db9a6e..8ff5dc12596 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -230,10 +230,40 @@ impl SubstitutionPart {
         !self.snippet.is_empty() && self.replaces_meaningful_content(sm)
     }
 
+    /// Whether this is a replacement that overwrites source with a snippet
+    /// in a way that isn't a superset of the original string. For example,
+    /// replacing "abc" with "abcde" is not destructive, but replacing it
+    /// it with "abx" is, since the "c" character is lost.
+    pub fn is_destructive_replacement(&self, sm: &SourceMap) -> bool {
+        self.is_replacement(sm)
+            && !sm.span_to_snippet(self.span).is_ok_and(|snippet| {
+                self.snippet.trim_start().starts_with(snippet.trim_start())
+                    || self.snippet.trim_end().ends_with(snippet.trim_end())
+            })
+    }
+
     fn replaces_meaningful_content(&self, sm: &SourceMap) -> bool {
         sm.span_to_snippet(self.span)
             .map_or(!self.span.is_empty(), |snippet| !snippet.trim().is_empty())
     }
+
+    /// Try to turn a replacement into an addition when the span that is being
+    /// overwritten matches either the prefix or suffix of the replacement.
+    fn trim_trivial_replacements(&mut self, sm: &SourceMap) {
+        if self.snippet.is_empty() {
+            return;
+        }
+        let Ok(snippet) = sm.span_to_snippet(self.span) else {
+            return;
+        };
+        if self.snippet.starts_with(&snippet) {
+            self.span = self.span.shrink_to_hi();
+            self.snippet = self.snippet[snippet.len()..].to_string();
+        } else if self.snippet.ends_with(&snippet) {
+            self.span = self.span.shrink_to_lo();
+            self.snippet = self.snippet[..self.snippet.len() - snippet.len()].to_string();
+        }
+    }
 }
 
 impl CodeSuggestion {
diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
index e74ffeff343..1113f7f7095 100644
--- a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
+++ b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
@@ -798,13 +798,16 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 bug!("`resolve_ty_and_res_fully_qualified_call` called on `LangItem`")
             }
         };
+
+        self.register_wf_obligation(
+            ty.raw.into(),
+            qself.span,
+            ObligationCauseCode::WellFormed(None),
+        );
+        self.select_obligations_where_possible(|_| {});
+
         if let Some(&cached_result) = self.typeck_results.borrow().type_dependent_defs().get(hir_id)
         {
-            self.register_wf_obligation(
-                ty.raw.into(),
-                qself.span,
-                ObligationCauseCode::WellFormed(None),
-            );
             // Return directly on cache hit. This is useful to avoid doubly reporting
             // errors with default match binding modes. See #44614.
             let def = cached_result.map_or(Res::Err, |(kind, def_id)| Res::Def(kind, def_id));
@@ -824,18 +827,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
                 let trait_missing_method =
                     matches!(error, method::MethodError::NoMatch(_)) && ty.normalized.is_trait();
-                // If we have a path like `MyTrait::missing_method`, then don't register
-                // a WF obligation for `dyn MyTrait` when method lookup fails. Otherwise,
-                // register a WF obligation so that we can detect any additional
-                // errors in the self type.
-                if !trait_missing_method {
-                    self.register_wf_obligation(
-                        ty.raw.into(),
-                        qself.span,
-                        ObligationCauseCode::WellFormed(None),
-                    );
-                }
-
                 if item_name.name != kw::Empty {
                     self.report_method_error(
                         hir_id,
@@ -849,14 +840,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 result
             });
 
-        if result.is_ok() {
-            self.register_wf_obligation(
-                ty.raw.into(),
-                qself.span,
-                ObligationCauseCode::WellFormed(None),
-            );
-        }
-
         // Write back the new resolution.
         self.write_resolution(hir_id, result);
         (
diff --git a/compiler/rustc_mir_transform/src/coverage/counters.rs b/compiler/rustc_mir_transform/src/coverage/counters.rs
index 6f9984d5d0a..039f346495b 100644
--- a/compiler/rustc_mir_transform/src/coverage/counters.rs
+++ b/compiler/rustc_mir_transform/src/coverage/counters.rs
@@ -114,12 +114,8 @@ pub(crate) fn transcribe_counters(
         let mut new_counters_for_sites = |sites: Vec<BasicCoverageBlock>| {
             sites.into_iter().map(|node| new.ensure_phys_counter(node)).collect::<Vec<_>>()
         };
-        let mut pos = new_counters_for_sites(pos);
-        let mut neg = new_counters_for_sites(neg);
-
-        // These sorts are also not strictly necessary; see above.
-        pos.sort();
-        neg.sort();
+        let pos = new_counters_for_sites(pos);
+        let neg = new_counters_for_sites(neg);
 
         let pos_counter = new.make_sum(&pos).unwrap_or(CovTerm::Zero);
         let new_counter = new.make_subtracted_sum(pos_counter, &neg);
diff --git a/compiler/rustc_mir_transform/src/coverage/query.rs b/compiler/rustc_mir_transform/src/coverage/query.rs
index cd89fbe772d..ef86358b205 100644
--- a/compiler/rustc_mir_transform/src/coverage/query.rs
+++ b/compiler/rustc_mir_transform/src/coverage/query.rs
@@ -123,11 +123,20 @@ fn coverage_ids_info<'tcx>(
         }
     }
 
-    // FIXME(Zalathar): It should be possible to sort `priority_list[1..]` by
-    // `!bcbs_seen.contains(bcb)` to simplify the mappings even further, at the
-    // expense of some churn in the tests. When doing so, also consider removing
-    // the sorts in `transcribe_counters`.
-    let node_counters = make_node_counters(&fn_cov_info.node_flow_data, &fn_cov_info.priority_list);
+    // Clone the priority list so that we can re-sort it.
+    let mut priority_list = fn_cov_info.priority_list.clone();
+    // The first ID in the priority list represents the synthetic "sink" node,
+    // and must remain first so that it _never_ gets a physical counter.
+    debug_assert_eq!(priority_list[0], priority_list.iter().copied().max().unwrap());
+    assert!(!bcbs_seen.contains(priority_list[0]));
+    // Partition the priority list, so that unreachable nodes (removed by MIR opts)
+    // are sorted later and therefore are _more_ likely to get a physical counter.
+    // This is counter-intuitive, but it means that `transcribe_counters` can
+    // easily skip those unused physical counters and replace them with zero.
+    // (The original ordering remains in effect within both partitions.)
+    priority_list[1..].sort_by_key(|&bcb| !bcbs_seen.contains(bcb));
+
+    let node_counters = make_node_counters(&fn_cov_info.node_flow_data, &priority_list);
     let coverage_counters = transcribe_counters(&node_counters, &bcb_needs_counter, &bcbs_seen);
 
     let CoverageCounters {
diff --git a/compiler/rustc_mir_transform/src/inline.rs b/compiler/rustc_mir_transform/src/inline.rs
index ab617e2ce6f..1f8392b2118 100644
--- a/compiler/rustc_mir_transform/src/inline.rs
+++ b/compiler/rustc_mir_transform/src/inline.rs
@@ -49,8 +49,7 @@ impl<'tcx> crate::MirPass<'tcx> for Inline {
         match sess.mir_opt_level() {
             0 | 1 => false,
             2 => {
-                (sess.opts.optimize == OptLevel::Default
-                    || sess.opts.optimize == OptLevel::Aggressive)
+                (sess.opts.optimize == OptLevel::More || sess.opts.optimize == OptLevel::Aggressive)
                     && sess.opts.incremental == None
             }
             _ => true,
diff --git a/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs b/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs
index a3274fb4011..b0f59ed1474 100644
--- a/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs
@@ -6,7 +6,6 @@ use derive_where::derive_where;
 use rustc_type_ir::fold::TypeFoldable;
 use rustc_type_ir::inherent::*;
 use rustc_type_ir::lang_items::TraitSolverLangItem;
-use rustc_type_ir::solve::inspect;
 use rustc_type_ir::visit::TypeVisitableExt as _;
 use rustc_type_ir::{self as ty, Interner, TypingMode, Upcast as _, elaborate};
 use tracing::{debug, instrument};
@@ -297,25 +296,6 @@ where
         let Ok(normalized_self_ty) =
             self.structurally_normalize_ty(goal.param_env, goal.predicate.self_ty())
         else {
-            // FIXME: We register a fake candidate when normalization fails so that
-            // we can point at the reason for *why*. I'm tempted to say that this
-            // is the wrong way to do this, though.
-            let result =
-                self.probe(|&result| inspect::ProbeKind::RigidAlias { result }).enter(|this| {
-                    let normalized_ty = this.next_ty_infer();
-                    let alias_relate_goal = Goal::new(
-                        this.cx(),
-                        goal.param_env,
-                        ty::PredicateKind::AliasRelate(
-                            goal.predicate.self_ty().into(),
-                            normalized_ty.into(),
-                            ty::AliasRelationDirection::Equate,
-                        ),
-                    );
-                    this.add_goal(GoalSource::AliasWellFormed, alias_relate_goal);
-                    this.evaluate_added_goals_and_make_canonical_response(Certainty::AMBIGUOUS)
-                });
-            assert_eq!(result, Err(NoSolution));
             return vec![];
         };
 
@@ -797,11 +777,12 @@ where
     /// treat the alias as rigid.
     ///
     /// See trait-system-refactor-initiative#124 for more details.
-    #[instrument(level = "debug", skip(self), ret)]
+    #[instrument(level = "debug", skip(self, inject_normalize_to_rigid_candidate), ret)]
     pub(super) fn merge_candidates(
         &mut self,
         proven_via: Option<TraitGoalProvenVia>,
         candidates: Vec<Candidate<I>>,
+        inject_normalize_to_rigid_candidate: impl FnOnce(&mut EvalCtxt<'_, D>) -> QueryResult<I>,
     ) -> QueryResult<I> {
         let Some(proven_via) = proven_via else {
             // We don't care about overflow. If proving the trait goal overflowed, then
@@ -818,13 +799,27 @@ where
             // FIXME(const_trait_impl): should this behavior also be used by
             // constness checking. Doing so is *at least theoretically* breaking,
             // see github.com/rust-lang/rust/issues/133044#issuecomment-2500709754
-            TraitGoalProvenVia::ParamEnv | TraitGoalProvenVia::AliasBound => candidates
-                .iter()
-                .filter(|c| {
-                    matches!(c.source, CandidateSource::AliasBound | CandidateSource::ParamEnv(_))
-                })
-                .map(|c| c.result)
-                .collect(),
+            TraitGoalProvenVia::ParamEnv | TraitGoalProvenVia::AliasBound => {
+                let mut candidates_from_env: Vec<_> = candidates
+                    .iter()
+                    .filter(|c| {
+                        matches!(
+                            c.source,
+                            CandidateSource::AliasBound | CandidateSource::ParamEnv(_)
+                        )
+                    })
+                    .map(|c| c.result)
+                    .collect();
+
+                // If the trait goal has been proven by using the environment, we want to treat
+                // aliases as rigid if there are no applicable projection bounds in the environment.
+                if candidates_from_env.is_empty() {
+                    if let Ok(response) = inject_normalize_to_rigid_candidate(self) {
+                        candidates_from_env.push(response);
+                    }
+                }
+                candidates_from_env
+            }
             TraitGoalProvenVia::Misc => candidates.iter().map(|c| c.result).collect(),
         };
 
diff --git a/compiler/rustc_next_trait_solver/src/solve/effect_goals.rs b/compiler/rustc_next_trait_solver/src/solve/effect_goals.rs
index eb398e8724d..0b61c368d8e 100644
--- a/compiler/rustc_next_trait_solver/src/solve/effect_goals.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/effect_goals.rs
@@ -405,6 +405,6 @@ where
                 goal.with(ecx.cx(), goal.predicate.trait_ref);
             ecx.compute_trait_goal(trait_goal)
         })?;
-        self.merge_candidates(proven_via, candidates)
+        self.merge_candidates(proven_via, candidates, |_ecx| Err(NoSolution))
     }
 }
diff --git a/compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs b/compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs
index 1d0ec7b45ca..88002e1a88a 100644
--- a/compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs
@@ -30,75 +30,26 @@ where
     ) -> QueryResult<I> {
         self.set_is_normalizes_to_goal();
         debug_assert!(self.term_is_fully_unconstrained(goal));
-        let normalize_result = self
-            .probe(|&result| ProbeKind::TryNormalizeNonRigid { result })
-            .enter(|this| this.normalize_at_least_one_step(goal));
-
-        match normalize_result {
-            Ok(res) => Ok(res),
-            Err(NoSolution) => {
-                self.probe(|&result| ProbeKind::RigidAlias { result }).enter(|this| {
-                    let Goal { param_env, predicate: NormalizesTo { alias, term } } = goal;
-                    this.add_rigid_constraints(param_env, alias)?;
-                    this.relate_rigid_alias_non_alias(param_env, alias, ty::Invariant, term)?;
-                    this.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
-                })
-            }
-        }
-    }
-
-    /// Register any obligations that are used to validate that an alias should be
-    /// treated as rigid.
-    ///
-    /// An alias may be considered rigid if it fails normalization, but we also don't
-    /// want to consider aliases that are not well-formed to be rigid simply because
-    /// they fail normalization.
-    ///
-    /// For example, some `<T as Trait>::Assoc` where `T: Trait` does not hold, or an
-    /// opaque type whose hidden type doesn't actually satisfy the opaque item bounds.
-    fn add_rigid_constraints(
-        &mut self,
-        param_env: I::ParamEnv,
-        rigid_alias: ty::AliasTerm<I>,
-    ) -> Result<(), NoSolution> {
-        let cx = self.cx();
-        match rigid_alias.kind(cx) {
-            // Projections are rigid only if their trait ref holds,
-            // and the GAT where-clauses hold.
-            ty::AliasTermKind::ProjectionTy | ty::AliasTermKind::ProjectionConst => {
-                let trait_ref = rigid_alias.trait_ref(cx);
-                self.add_goal(GoalSource::AliasWellFormed, Goal::new(cx, param_env, trait_ref));
-                Ok(())
-            }
-            ty::AliasTermKind::OpaqueTy => {
-                if self.opaque_type_is_rigid(rigid_alias.def_id) {
-                    Ok(())
-                } else {
-                    Err(NoSolution)
-                }
-            }
-            // FIXME(generic_const_exprs): we would need to support generic consts here
-            ty::AliasTermKind::UnevaluatedConst => Err(NoSolution),
-            // Inherent and weak types are never rigid. This type must not be well-formed.
-            ty::AliasTermKind::WeakTy | ty::AliasTermKind::InherentTy => Err(NoSolution),
-        }
-    }
-
-    /// Normalize the given alias by at least one step. If the alias is rigid, this
-    /// returns `NoSolution`.
-    #[instrument(level = "trace", skip(self), ret)]
-    fn normalize_at_least_one_step(&mut self, goal: Goal<I, NormalizesTo<I>>) -> QueryResult<I> {
         let cx = self.cx();
         match goal.predicate.alias.kind(cx) {
             ty::AliasTermKind::ProjectionTy | ty::AliasTermKind::ProjectionConst => {
                 let candidates = self.assemble_and_evaluate_candidates(goal);
+                let trait_ref = goal.predicate.alias.trait_ref(cx);
                 let (_, proven_via) =
                     self.probe(|_| ProbeKind::ShadowedEnvProbing).enter(|ecx| {
-                        let trait_goal: Goal<I, ty::TraitPredicate<I>> =
-                            goal.with(cx, goal.predicate.alias.trait_ref(cx));
+                        let trait_goal: Goal<I, ty::TraitPredicate<I>> = goal.with(cx, trait_ref);
                         ecx.compute_trait_goal(trait_goal)
                     })?;
-                self.merge_candidates(proven_via, candidates)
+                self.merge_candidates(proven_via, candidates, |ecx| {
+                    ecx.probe(|&result| ProbeKind::RigidAlias { result }).enter(|this| {
+                        this.structurally_instantiate_normalizes_to_term(
+                            goal,
+                            goal.predicate.alias,
+                        );
+                        this.add_goal(GoalSource::AliasWellFormed, goal.with(cx, trait_ref));
+                        this.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
+                    })
+                })
             }
             ty::AliasTermKind::InherentTy => self.normalize_inherent_associated_type(goal),
             ty::AliasTermKind::OpaqueTy => self.normalize_opaque_type(goal),
@@ -120,6 +71,17 @@ where
         self.eq(goal.param_env, goal.predicate.term, term)
             .expect("expected goal term to be fully unconstrained");
     }
+
+    /// Unlike `instantiate_normalizes_to_term` this instantiates the expected term
+    /// with a rigid alias. Using this is pretty much always wrong.
+    pub fn structurally_instantiate_normalizes_to_term(
+        &mut self,
+        goal: Goal<I, NormalizesTo<I>>,
+        term: ty::AliasTerm<I>,
+    ) {
+        self.relate_rigid_alias_non_alias(goal.param_env, term, ty::Invariant, goal.predicate.term)
+            .expect("expected goal term to be fully unconstrained");
+    }
 }
 
 impl<D, I> assembly::GoalKind<D> for NormalizesTo<I>
@@ -576,80 +538,92 @@ where
         let cx = ecx.cx();
         let metadata_def_id = cx.require_lang_item(TraitSolverLangItem::Metadata);
         assert_eq!(metadata_def_id, goal.predicate.def_id());
-        ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
-            let metadata_ty = match goal.predicate.self_ty().kind() {
-                ty::Bool
-                | ty::Char
-                | ty::Int(..)
-                | ty::Uint(..)
-                | ty::Float(..)
-                | ty::Array(..)
-                | ty::Pat(..)
-                | ty::RawPtr(..)
-                | ty::Ref(..)
-                | ty::FnDef(..)
-                | ty::FnPtr(..)
-                | ty::Closure(..)
-                | ty::CoroutineClosure(..)
-                | ty::Infer(ty::IntVar(..) | ty::FloatVar(..))
-                | ty::Coroutine(..)
-                | ty::CoroutineWitness(..)
-                | ty::Never
-                | ty::Foreign(..)
-                | ty::Dynamic(_, _, ty::DynStar) => Ty::new_unit(cx),
-
-                ty::Error(e) => Ty::new_error(cx, e),
-
-                ty::Str | ty::Slice(_) => Ty::new_usize(cx),
-
-                ty::Dynamic(_, _, ty::Dyn) => {
-                    let dyn_metadata = cx.require_lang_item(TraitSolverLangItem::DynMetadata);
-                    cx.type_of(dyn_metadata)
-                        .instantiate(cx, &[I::GenericArg::from(goal.predicate.self_ty())])
-                }
+        let metadata_ty = match goal.predicate.self_ty().kind() {
+            ty::Bool
+            | ty::Char
+            | ty::Int(..)
+            | ty::Uint(..)
+            | ty::Float(..)
+            | ty::Array(..)
+            | ty::Pat(..)
+            | ty::RawPtr(..)
+            | ty::Ref(..)
+            | ty::FnDef(..)
+            | ty::FnPtr(..)
+            | ty::Closure(..)
+            | ty::CoroutineClosure(..)
+            | ty::Infer(ty::IntVar(..) | ty::FloatVar(..))
+            | ty::Coroutine(..)
+            | ty::CoroutineWitness(..)
+            | ty::Never
+            | ty::Foreign(..)
+            | ty::Dynamic(_, _, ty::DynStar) => Ty::new_unit(cx),
 
-                ty::Alias(_, _) | ty::Param(_) | ty::Placeholder(..) => {
-                    // This is the "fallback impl" for type parameters, unnormalizable projections
-                    // and opaque types: If the `self_ty` is `Sized`, then the metadata is `()`.
-                    // FIXME(ptr_metadata): This impl overlaps with the other impls and shouldn't
-                    // exist. Instead, `Pointee<Metadata = ()>` should be a supertrait of `Sized`.
-                    let sized_predicate = ty::TraitRef::new(
-                        cx,
-                        cx.require_lang_item(TraitSolverLangItem::Sized),
-                        [I::GenericArg::from(goal.predicate.self_ty())],
-                    );
-                    // FIXME(-Znext-solver=coinductive): Should this be `GoalSource::ImplWhereBound`?
-                    ecx.add_goal(GoalSource::Misc, goal.with(cx, sized_predicate));
-                    Ty::new_unit(cx)
-                }
+            ty::Error(e) => Ty::new_error(cx, e),
 
-                ty::Adt(def, args) if def.is_struct() => match def.struct_tail_ty(cx) {
-                    None => Ty::new_unit(cx),
-                    Some(tail_ty) => {
-                        Ty::new_projection(cx, metadata_def_id, [tail_ty.instantiate(cx, args)])
-                    }
-                },
-                ty::Adt(_, _) => Ty::new_unit(cx),
+            ty::Str | ty::Slice(_) => Ty::new_usize(cx),
 
-                ty::Tuple(elements) => match elements.last() {
-                    None => Ty::new_unit(cx),
-                    Some(tail_ty) => Ty::new_projection(cx, metadata_def_id, [tail_ty]),
-                },
+            ty::Dynamic(_, _, ty::Dyn) => {
+                let dyn_metadata = cx.require_lang_item(TraitSolverLangItem::DynMetadata);
+                cx.type_of(dyn_metadata)
+                    .instantiate(cx, &[I::GenericArg::from(goal.predicate.self_ty())])
+            }
+
+            ty::Alias(_, _) | ty::Param(_) | ty::Placeholder(..) => {
+                // This is the "fallback impl" for type parameters, unnormalizable projections
+                // and opaque types: If the `self_ty` is `Sized`, then the metadata is `()`.
+                // FIXME(ptr_metadata): This impl overlaps with the other impls and shouldn't
+                // exist. Instead, `Pointee<Metadata = ()>` should be a supertrait of `Sized`.
+                let alias_bound_result =
+                    ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
+                        let sized_predicate = ty::TraitRef::new(
+                            cx,
+                            cx.require_lang_item(TraitSolverLangItem::Sized),
+                            [I::GenericArg::from(goal.predicate.self_ty())],
+                        );
+                        ecx.add_goal(GoalSource::Misc, goal.with(cx, sized_predicate));
+                        ecx.instantiate_normalizes_to_term(goal, Ty::new_unit(cx).into());
+                        ecx.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
+                    });
+                // In case the dummy alias-bound candidate does not apply, we instead treat this projection
+                // as rigid.
+                return alias_bound_result.or_else(|NoSolution| {
+                    ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|this| {
+                        this.structurally_instantiate_normalizes_to_term(
+                            goal,
+                            goal.predicate.alias,
+                        );
+                        this.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
+                    })
+                });
+            }
 
-                ty::UnsafeBinder(_) => {
-                    // FIXME(unsafe_binder): Figure out how to handle pointee for unsafe binders.
-                    todo!()
+            ty::Adt(def, args) if def.is_struct() => match def.struct_tail_ty(cx) {
+                None => Ty::new_unit(cx),
+                Some(tail_ty) => {
+                    Ty::new_projection(cx, metadata_def_id, [tail_ty.instantiate(cx, args)])
                 }
+            },
+            ty::Adt(_, _) => Ty::new_unit(cx),
 
-                ty::Infer(
-                    ty::TyVar(_) | ty::FreshTy(_) | ty::FreshIntTy(_) | ty::FreshFloatTy(_),
-                )
-                | ty::Bound(..) => panic!(
-                    "unexpected self ty `{:?}` when normalizing `<T as Pointee>::Metadata`",
-                    goal.predicate.self_ty()
-                ),
-            };
+            ty::Tuple(elements) => match elements.last() {
+                None => Ty::new_unit(cx),
+                Some(tail_ty) => Ty::new_projection(cx, metadata_def_id, [tail_ty]),
+            },
 
+            ty::UnsafeBinder(_) => {
+                // FIXME(unsafe_binder): Figure out how to handle pointee for unsafe binders.
+                todo!()
+            }
+
+            ty::Infer(ty::TyVar(_) | ty::FreshTy(_) | ty::FreshIntTy(_) | ty::FreshFloatTy(_))
+            | ty::Bound(..) => panic!(
+                "unexpected self ty `{:?}` when normalizing `<T as Pointee>::Metadata`",
+                goal.predicate.self_ty()
+            ),
+        };
+
+        ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
             ecx.instantiate_normalizes_to_term(goal, metadata_ty.into());
             ecx.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
         })
@@ -850,12 +824,14 @@ where
                 todo!("discr subgoal...")
             }
 
-            // We do not call `Ty::discriminant_ty` on alias, param, or placeholder
-            // types, which return `<self_ty as DiscriminantKind>::Discriminant`
-            // (or ICE in the case of placeholders). Projecting a type to itself
-            // is never really productive.
+            // Given an alias, parameter, or placeholder we add an impl candidate normalizing to a rigid
+            // alias. In case there's a where-bound further constraining this alias it is preferred over
+            // this impl candidate anyways. It's still a bit scuffed.
             ty::Alias(_, _) | ty::Param(_) | ty::Placeholder(..) => {
-                return Err(NoSolution);
+                return ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
+                    ecx.structurally_instantiate_normalizes_to_term(goal, goal.predicate.alias);
+                    ecx.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
+                });
             }
 
             ty::Infer(ty::TyVar(_) | ty::FreshTy(_) | ty::FreshIntTy(_) | ty::FreshFloatTy(_))
@@ -902,12 +878,14 @@ where
                 todo!()
             }
 
-            // We do not call `Ty::async_destructor_ty` on alias, param, or placeholder
-            // types, which return `<self_ty as AsyncDestruct>::AsyncDestructor`
-            // (or ICE in the case of placeholders). Projecting a type to itself
-            // is never really productive.
+            // Given an alias, parameter, or placeholder we add an impl candidate normalizing to a rigid
+            // alias. In case there's a where-bound further constraining this alias it is preferred over
+            // this impl candidate anyways. It's still a bit scuffed.
             ty::Alias(_, _) | ty::Param(_) | ty::Placeholder(..) => {
-                return Err(NoSolution);
+                return ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
+                    ecx.structurally_instantiate_normalizes_to_term(goal, goal.predicate.alias);
+                    ecx.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
+                });
             }
 
             ty::Infer(ty::TyVar(_) | ty::FreshTy(_) | ty::FreshIntTy(_) | ty::FreshFloatTy(_))
diff --git a/compiler/rustc_next_trait_solver/src/solve/normalizes_to/opaque_types.rs b/compiler/rustc_next_trait_solver/src/solve/normalizes_to/opaque_types.rs
index 26a8a22d77e..60c20762a30 100644
--- a/compiler/rustc_next_trait_solver/src/solve/normalizes_to/opaque_types.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/normalizes_to/opaque_types.rs
@@ -35,14 +35,15 @@ where
                 self.evaluate_added_goals_and_make_canonical_response(Certainty::AMBIGUOUS)
             }
             TypingMode::Analysis { defining_opaque_types } => {
-                let Some(def_id) = opaque_ty.def_id.as_local() else {
-                    return Err(NoSolution);
+                let Some(def_id) = opaque_ty
+                    .def_id
+                    .as_local()
+                    .filter(|&def_id| defining_opaque_types.contains(&def_id))
+                else {
+                    self.structurally_instantiate_normalizes_to_term(goal, goal.predicate.alias);
+                    return self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes);
                 };
 
-                if !defining_opaque_types.contains(&def_id) {
-                    return Err(NoSolution);
-                }
-
                 // FIXME: This may have issues when the args contain aliases...
                 match uses_unique_placeholders_ignoring_regions(self.cx(), opaque_ty.args) {
                     Err(NotUniqueParam::NotParam(param)) if param.is_non_region_infer() => {
@@ -97,15 +98,16 @@ where
                 self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
             }
             TypingMode::PostBorrowckAnalysis { defined_opaque_types } => {
-                let Some(def_id) = opaque_ty.def_id.as_local() else {
-                    return Err(NoSolution);
+                let Some(def_id) = opaque_ty
+                    .def_id
+                    .as_local()
+                    .filter(|&def_id| defined_opaque_types.contains(&def_id))
+                else {
+                    self.structurally_instantiate_normalizes_to_term(goal, goal.predicate.alias);
+                    return self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes);
                 };
 
-                if !defined_opaque_types.contains(&def_id) {
-                    return Err(NoSolution);
-                }
-
-                let actual = cx.type_of(opaque_ty.def_id).instantiate(cx, opaque_ty.args);
+                let actual = cx.type_of(def_id.into()).instantiate(cx, opaque_ty.args);
                 // FIXME: Actually use a proper binder here instead of relying on `ReErased`.
                 //
                 // This is also probably unsound or sth :shrug:
diff --git a/compiler/rustc_resolve/src/late/diagnostics.rs b/compiler/rustc_resolve/src/late/diagnostics.rs
index a80b68d9773..0962865e7f1 100644
--- a/compiler/rustc_resolve/src/late/diagnostics.rs
+++ b/compiler/rustc_resolve/src/late/diagnostics.rs
@@ -2347,9 +2347,14 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> {
     // try to give a suggestion for this pattern: `name = blah`, which is common in other languages
     // suggest `let name = blah` to introduce a new binding
     fn let_binding_suggestion(&mut self, err: &mut Diag<'_>, ident_span: Span) -> bool {
+        if ident_span.from_expansion() {
+            return false;
+        }
+
+        // only suggest when the code is a assignment without prefix code
         if let Some(Expr { kind: ExprKind::Assign(lhs, ..), .. }) = self.diag_metadata.in_assignment
             && let ast::ExprKind::Path(None, ref path) = lhs.kind
-            && !ident_span.from_expansion()
+            && self.r.tcx.sess.source_map().is_line_before_span_empty(ident_span)
         {
             let (span, text) = match path.segments.first() {
                 Some(seg) if let Some(name) = seg.ident.as_str().strip_prefix("let") => {
@@ -2368,6 +2373,22 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> {
             );
             return true;
         }
+
+        // a special case for #133713
+        // '=' maybe a typo of `:`, which is a type annotation instead of assignment
+        if err.code == Some(E0423)
+            && let Some((let_span, None, Some(val_span))) = self.diag_metadata.current_let_binding
+            && val_span.contains(ident_span)
+            && val_span.lo() == ident_span.lo()
+        {
+            err.span_suggestion_verbose(
+                let_span.shrink_to_hi().to(val_span.shrink_to_lo()),
+                "you might have meant to use `:` for type annotation",
+                ": ",
+                Applicability::MaybeIncorrect,
+            );
+            return true;
+        }
         false
     }
 
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 2fb4b27b889..7d473b86ff5 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -86,12 +86,18 @@ pub enum CFProtection {
 
 #[derive(Clone, Copy, Debug, PartialEq, Hash, HashStable_Generic)]
 pub enum OptLevel {
-    No,         // -O0
-    Less,       // -O1
-    Default,    // -O2
-    Aggressive, // -O3
-    Size,       // -Os
-    SizeMin,    // -Oz
+    /// `-Copt-level=0`
+    No,
+    /// `-Copt-level=1`
+    Less,
+    /// `-Copt-level=2`
+    More,
+    /// `-Copt-level=3` / `-O`
+    Aggressive,
+    /// `-Copt-level=s`
+    Size,
+    /// `-Copt-level=z`
+    SizeMin,
 }
 
 /// This is what the `LtoCli` values get mapped to after resolving defaults and
@@ -1253,7 +1259,7 @@ impl Options {
             Some(setting) => setting,
             None => match self.optimize {
                 OptLevel::No | OptLevel::Less | OptLevel::Size | OptLevel::SizeMin => true,
-                OptLevel::Default | OptLevel::Aggressive => false,
+                OptLevel::More | OptLevel::Aggressive => false,
             },
         }
     }
@@ -1572,7 +1578,7 @@ pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
              stack-protector-strategies|link-args|deployment-target]",
         ),
         opt(Stable, FlagMulti, "g", "", "Equivalent to -C debuginfo=2", ""),
-        opt(Stable, FlagMulti, "O", "", "Equivalent to -C opt-level=2", ""),
+        opt(Stable, FlagMulti, "O", "", "Equivalent to -C opt-level=3", ""),
         opt(Stable, Opt, "o", "", "Write output to <filename>", "FILENAME"),
         opt(Stable, Opt, "", "out-dir", "Write output to compiler-chosen filename in <dir>", "DIR"),
         opt(
@@ -2127,12 +2133,12 @@ fn parse_opt_level(
         })
         .max();
     if max_o > max_c {
-        OptLevel::Default
+        OptLevel::Aggressive
     } else {
         match cg.opt_level.as_ref() {
             "0" => OptLevel::No,
             "1" => OptLevel::Less,
-            "2" => OptLevel::Default,
+            "2" => OptLevel::More,
             "3" => OptLevel::Aggressive,
             "s" => OptLevel::Size,
             "z" => OptLevel::SizeMin,
diff --git a/compiler/rustc_span/src/analyze_source_file.rs b/compiler/rustc_span/src/analyze_source_file.rs
index fba20566580..47cc16b623d 100644
--- a/compiler/rustc_span/src/analyze_source_file.rs
+++ b/compiler/rustc_span/src/analyze_source_file.rs
@@ -95,65 +95,32 @@ cfg_match! {
                 if multibyte_mask == 0 {
                     assert!(intra_chunk_offset == 0);
 
-                    // Check if there are any control characters in the chunk. All
-                    // control characters that we can encounter at this point have a
-                    // byte value less than 32 or ...
-                    let control_char_test0 = unsafe { _mm_cmplt_epi8(chunk, _mm_set1_epi8(32)) };
-                    let control_char_mask0 = unsafe { _mm_movemask_epi8(control_char_test0) };
-
-                    // ... it's the ASCII 'DEL' character with a value of 127.
-                    let control_char_test1 = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(127)) };
-                    let control_char_mask1 = unsafe { _mm_movemask_epi8(control_char_test1) };
-
-                    let control_char_mask = control_char_mask0 | control_char_mask1;
-
-                    if control_char_mask != 0 {
-                        // Check for newlines in the chunk
-                        let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) };
-                        let newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) };
-
-                        if control_char_mask == newlines_mask {
-                            // All control characters are newlines, record them
-                            let mut newlines_mask = 0xFFFF0000 | newlines_mask as u32;
-                            let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1);
-
-                            loop {
-                                let index = newlines_mask.trailing_zeros();
-
-                                if index >= CHUNK_SIZE as u32 {
-                                    // We have arrived at the end of the chunk.
-                                    break;
-                                }
-
-                                lines.push(RelativeBytePos(index) + output_offset);
-
-                                // Clear the bit, so we can find the next one.
-                                newlines_mask &= (!1) << index;
-                            }
-
-                            // We are done for this chunk. All control characters were
-                            // newlines and we took care of those.
-                            continue;
-                        } else {
-                            // Some of the control characters are not newlines,
-                            // fall through to the slow path below.
-                        }
-                    } else {
-                        // No control characters, nothing to record for this chunk
-                        continue;
+                    // Check for newlines in the chunk
+                    let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) };
+                    let mut newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) };
+
+                    let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1);
+
+                    while newlines_mask != 0 {
+                        let index = newlines_mask.trailing_zeros();
+
+                        lines.push(RelativeBytePos(index) + output_offset);
+
+                        // Clear the bit, so we can find the next one.
+                        newlines_mask &= newlines_mask - 1;
                     }
+                } else {
+                    // The slow path.
+                    // There are multibyte chars in here, fallback to generic decoding.
+                    let scan_start = chunk_index * CHUNK_SIZE + intra_chunk_offset;
+                    intra_chunk_offset = analyze_source_file_generic(
+                        &src[scan_start..],
+                        CHUNK_SIZE - intra_chunk_offset,
+                        RelativeBytePos::from_usize(scan_start),
+                        lines,
+                        multi_byte_chars,
+                    );
                 }
-
-                // The slow path.
-                // There are control chars in here, fallback to generic decoding.
-                let scan_start = chunk_index * CHUNK_SIZE + intra_chunk_offset;
-                intra_chunk_offset = analyze_source_file_generic(
-                    &src[scan_start..],
-                    CHUNK_SIZE - intra_chunk_offset,
-                    RelativeBytePos::from_usize(scan_start),
-                    lines,
-                    multi_byte_chars,
-                );
             }
 
             // There might still be a tail left to analyze
@@ -253,65 +220,32 @@ cfg_match! {
                 if multibyte_mask == 0 {
                     assert!(intra_chunk_offset == 0);
 
-                    // Check if there are any control characters in the chunk. All
-                    // control characters that we can encounter at this point have a
-                    // byte value less than 32 or ...
-                    let control_char_test0 = unsafe { _mm_cmplt_epi8(chunk, _mm_set1_epi8(32)) };
-                    let control_char_mask0 = unsafe { _mm_movemask_epi8(control_char_test0) };
-
-                    // ... it's the ASCII 'DEL' character with a value of 127.
-                    let control_char_test1 = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(127)) };
-                    let control_char_mask1 = unsafe { _mm_movemask_epi8(control_char_test1) };
-
-                    let control_char_mask = control_char_mask0 | control_char_mask1;
-
-                    if control_char_mask != 0 {
-                        // Check for newlines in the chunk
-                        let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) };
-                        let newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) };
-
-                        if control_char_mask == newlines_mask {
-                            // All control characters are newlines, record them
-                            let mut newlines_mask = 0xFFFF0000 | newlines_mask as u32;
-                            let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1);
-
-                            loop {
-                                let index = newlines_mask.trailing_zeros();
-
-                                if index >= CHUNK_SIZE as u32 {
-                                    // We have arrived at the end of the chunk.
-                                    break;
-                                }
-
-                                lines.push(RelativeBytePos(index) + output_offset);
-
-                                // Clear the bit, so we can find the next one.
-                                newlines_mask &= (!1) << index;
-                            }
-
-                            // We are done for this chunk. All control characters were
-                            // newlines and we took care of those.
-                            continue;
-                        } else {
-                            // Some of the control characters are not newlines,
-                            // fall through to the slow path below.
-                        }
-                    } else {
-                        // No control characters, nothing to record for this chunk
-                        continue;
+                    // Check for newlines in the chunk
+                    let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) };
+                    let mut newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) };
+
+                    let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1);
+
+                    while newlines_mask != 0 {
+                        let index = newlines_mask.trailing_zeros();
+
+                        lines.push(RelativeBytePos(index) + output_offset);
+
+                        // Clear the bit, so we can find the next one.
+                        newlines_mask &= newlines_mask - 1;
                     }
+                } else {
+                    // The slow path.
+                    // There are multibyte chars in here, fallback to generic decoding.
+                    let scan_start = chunk_index * CHUNK_SIZE + intra_chunk_offset;
+                    intra_chunk_offset = analyze_source_file_generic(
+                        &src[scan_start..],
+                        CHUNK_SIZE - intra_chunk_offset,
+                        RelativeBytePos::from_usize(scan_start),
+                        lines,
+                        multi_byte_chars,
+                    );
                 }
-
-                // The slow path.
-                // There are control chars in here, fallback to generic decoding.
-                let scan_start = chunk_index * CHUNK_SIZE + intra_chunk_offset;
-                intra_chunk_offset = analyze_source_file_generic(
-                    &src[scan_start..],
-                    CHUNK_SIZE - intra_chunk_offset,
-                    RelativeBytePos::from_usize(scan_start),
-                    lines,
-                    multi_byte_chars,
-                );
             }
 
             // There might still be a tail left to analyze
@@ -369,29 +303,18 @@ fn analyze_source_file_generic(
         // string.
         let mut char_len = 1;
 
-        if byte < 32 {
-            // This is an ASCII control character, it could be one of the cases
-            // that are interesting to us.
-
+        if byte == b'\n' {
             let pos = RelativeBytePos::from_usize(i) + output_offset;
-
-            if let b'\n' = byte {
-                lines.push(pos + RelativeBytePos(1));
-            }
-        } else if byte >= 127 {
-            // The slow path:
-            // This is either ASCII control character "DEL" or the beginning of
-            // a multibyte char. Just decode to `char`.
+            lines.push(pos + RelativeBytePos(1));
+        } else if byte >= 128 {
+            // This is the beginning of a multibyte char. Just decode to `char`.
             let c = src[i..].chars().next().unwrap();
             char_len = c.len_utf8();
 
             let pos = RelativeBytePos::from_usize(i) + output_offset;
-
-            if char_len > 1 {
-                assert!((2..=4).contains(&char_len));
-                let mbc = MultiByteChar { pos, bytes: char_len as u8 };
-                multi_byte_chars.push(mbc);
-            }
+            assert!((2..=4).contains(&char_len));
+            let mbc = MultiByteChar { pos, bytes: char_len as u8 };
+            multi_byte_chars.push(mbc);
         }
 
         i += char_len;
diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs
index 1b43820bac0..49fa21e50c0 100644
--- a/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs
+++ b/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs
@@ -585,6 +585,10 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                     ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(ty)) => {
                         let ty = self.resolve_vars_if_possible(ty);
                         if self.next_trait_solver() {
+                            if let Err(guar) = ty.error_reported() {
+                                return guar;
+                            }
+
                             // FIXME: we'll need a better message which takes into account
                             // which bounds actually failed to hold.
                             self.dcx().struct_span_err(
diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs
index 658fb4009d5..e4f250ca4f5 100644
--- a/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs
+++ b/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs
@@ -172,8 +172,8 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
             {
                 1
             }
-            ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(_)) => 3,
             ty::PredicateKind::Coerce(_) => 2,
+            ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(_)) => 3,
             _ => 0,
         });
 
diff --git a/compiler/rustc_trait_selection/src/solve/fulfill/derive_errors.rs b/compiler/rustc_trait_selection/src/solve/fulfill/derive_errors.rs
index 7364b4aa343..982782bc57c 100644
--- a/compiler/rustc_trait_selection/src/solve/fulfill/derive_errors.rs
+++ b/compiler/rustc_trait_selection/src/solve/fulfill/derive_errors.rs
@@ -7,7 +7,7 @@ use rustc_infer::traits::{
     PredicateObligation, SelectionError,
 };
 use rustc_middle::ty::error::{ExpectedFound, TypeError};
-use rustc_middle::ty::{self, TyCtxt};
+use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_middle::{bug, span_bug};
 use rustc_next_trait_solver::solve::{GenerateProofTree, SolverDelegateEvalExt as _};
 use rustc_type_ir::solve::{Goal, NoSolution};
@@ -139,6 +139,7 @@ pub(super) fn fulfillment_error_for_overflow<'tcx>(
     }
 }
 
+#[instrument(level = "debug", skip(infcx), ret)]
 fn find_best_leaf_obligation<'tcx>(
     infcx: &InferCtxt<'tcx>,
     obligation: &PredicateObligation<'tcx>,
@@ -197,6 +198,9 @@ impl<'tcx> BestObligation<'tcx> {
                 candidates.retain(|candidate| candidate.result().is_ok());
             }
             false => {
+                // We always handle rigid alias candidates separately as we may not add them for
+                // aliases whose trait bound doesn't hold.
+                candidates.retain(|c| !matches!(c.kind(), inspect::ProbeKind::RigidAlias { .. }));
                 // If we have >1 candidate, one may still be due to "boring" reasons, like
                 // an alias-relate that failed to hold when deeply evaluated. We really
                 // don't care about reasons like this.
@@ -211,23 +215,12 @@ impl<'tcx> BestObligation<'tcx> {
                                             | GoalSource::AliasBoundConstCondition
                                             | GoalSource::InstantiateHigherRanked
                                             | GoalSource::AliasWellFormed
-                                    ) && match (self.consider_ambiguities, nested_goal.result()) {
-                                        (true, Ok(Certainty::Maybe(MaybeCause::Ambiguity)))
-                                        | (false, Err(_)) => true,
-                                        _ => false,
-                                    }
+                                    ) && nested_goal.result().is_err()
                                 },
                             )
                         })
                     });
                 }
-
-                // Prefer a non-rigid candidate if there is one.
-                if candidates.len() > 1 {
-                    candidates.retain(|candidate| {
-                        !matches!(candidate.kind(), inspect::ProbeKind::RigidAlias { .. })
-                    });
-                }
             }
         }
 
@@ -266,6 +259,90 @@ impl<'tcx> BestObligation<'tcx> {
 
         ControlFlow::Break(self.obligation.clone())
     }
+
+    /// If a normalization of an associated item or a trait goal fails without trying any
+    /// candidates it's likely that normalizing its self type failed. We manually detect
+    /// such cases here.
+    fn detect_error_in_self_ty_normalization(
+        &mut self,
+        goal: &inspect::InspectGoal<'_, 'tcx>,
+        self_ty: Ty<'tcx>,
+    ) -> ControlFlow<PredicateObligation<'tcx>> {
+        assert!(!self.consider_ambiguities);
+        let tcx = goal.infcx().tcx;
+        if let ty::Alias(..) = self_ty.kind() {
+            let infer_term = goal.infcx().next_ty_var(self.obligation.cause.span);
+            let pred = ty::PredicateKind::AliasRelate(
+                self_ty.into(),
+                infer_term.into(),
+                ty::AliasRelationDirection::Equate,
+            );
+            let obligation =
+                Obligation::new(tcx, self.obligation.cause.clone(), goal.goal().param_env, pred);
+            self.with_derived_obligation(obligation, |this| {
+                goal.infcx().visit_proof_tree_at_depth(
+                    goal.goal().with(tcx, pred),
+                    goal.depth() + 1,
+                    this,
+                )
+            })
+        } else {
+            ControlFlow::Continue(())
+        }
+    }
+
+    /// It is likely that `NormalizesTo` failed without any applicable candidates
+    /// because the alias is not well-formed.
+    ///
+    /// As we only enter `RigidAlias` candidates if the trait bound of the associated type
+    /// holds, we discard these candidates in `non_trivial_candidates` and always manually
+    /// check this here.
+    fn detect_non_well_formed_assoc_item(
+        &mut self,
+        goal: &inspect::InspectGoal<'_, 'tcx>,
+        alias: ty::AliasTerm<'tcx>,
+    ) -> ControlFlow<PredicateObligation<'tcx>> {
+        let tcx = goal.infcx().tcx;
+        let obligation = Obligation::new(
+            tcx,
+            self.obligation.cause.clone(),
+            goal.goal().param_env,
+            alias.trait_ref(tcx),
+        );
+        self.with_derived_obligation(obligation, |this| {
+            goal.infcx().visit_proof_tree_at_depth(
+                goal.goal().with(tcx, alias.trait_ref(tcx)),
+                goal.depth() + 1,
+                this,
+            )
+        })
+    }
+
+    /// If we have no candidates, then it's likely that there is a
+    /// non-well-formed alias in the goal.
+    fn detect_error_from_empty_candidates(
+        &mut self,
+        goal: &inspect::InspectGoal<'_, 'tcx>,
+    ) -> ControlFlow<PredicateObligation<'tcx>> {
+        let tcx = goal.infcx().tcx;
+        let pred_kind = goal.goal().predicate.kind();
+
+        match pred_kind.no_bound_vars() {
+            Some(ty::PredicateKind::Clause(ty::ClauseKind::Trait(pred))) => {
+                self.detect_error_in_self_ty_normalization(goal, pred.self_ty())?;
+            }
+            Some(ty::PredicateKind::NormalizesTo(pred))
+                if let ty::AliasTermKind::ProjectionTy | ty::AliasTermKind::ProjectionConst =
+                    pred.alias.kind(tcx) =>
+            {
+                self.detect_error_in_self_ty_normalization(goal, pred.alias.self_ty())?;
+                self.detect_non_well_formed_assoc_item(goal, pred.alias)?;
+            }
+            Some(_) | None => {}
+        }
+
+        ControlFlow::Break(self.obligation.clone())
+    }
 }
 
 impl<'tcx> ProofTreeVisitor<'tcx> for BestObligation<'tcx> {
@@ -277,11 +354,19 @@ impl<'tcx> ProofTreeVisitor<'tcx> for BestObligation<'tcx> {
 
     #[instrument(level = "trace", skip(self, goal), fields(goal = ?goal.goal()))]
     fn visit_goal(&mut self, goal: &inspect::InspectGoal<'_, 'tcx>) -> Self::Result {
-        let candidates = self.non_trivial_candidates(goal);
-        trace!(candidates = ?candidates.iter().map(|c| c.kind()).collect::<Vec<_>>());
+        let tcx = goal.infcx().tcx;
+        // Skip goals that aren't the *reason* for our goal's failure.
+        match (self.consider_ambiguities, goal.result()) {
+            (true, Ok(Certainty::Maybe(MaybeCause::Ambiguity))) | (false, Err(_)) => {}
+            _ => return ControlFlow::Continue(()),
+        }
+        let pred_kind = goal.goal().predicate.kind();
 
-        let [candidate] = candidates.as_slice() else {
-            return ControlFlow::Break(self.obligation.clone());
+        let candidates = self.non_trivial_candidates(goal);
+        let candidate = match candidates.as_slice() {
+            [candidate] => candidate,
+            [] => return self.detect_error_from_empty_candidates(goal),
+            _ => return ControlFlow::Break(self.obligation.clone()),
         };
 
         // Don't walk into impls that have `do_not_recommend`.
@@ -291,13 +376,12 @@ impl<'tcx> ProofTreeVisitor<'tcx> for BestObligation<'tcx> {
         } = candidate.kind()
             && goal.infcx().tcx.do_not_recommend_impl(impl_def_id)
         {
+            trace!("#[do_not_recommend] -> exit");
             return ControlFlow::Break(self.obligation.clone());
         }
 
-        let tcx = goal.infcx().tcx;
         // FIXME: Also, what about considering >1 layer up the stack? May be necessary
         // for normalizes-to.
-        let pred_kind = goal.goal().predicate.kind();
         let child_mode = match pred_kind.skip_binder() {
             ty::PredicateKind::Clause(ty::ClauseKind::Trait(pred)) => {
                 ChildMode::Trait(pred_kind.rebind(pred))
@@ -390,12 +474,6 @@ impl<'tcx> ProofTreeVisitor<'tcx> for BestObligation<'tcx> {
                 }
             }
 
-            // Skip nested goals that aren't the *reason* for our goal's failure.
-            match (self.consider_ambiguities, nested_goal.result()) {
-                (true, Ok(Certainty::Maybe(MaybeCause::Ambiguity))) | (false, Err(_)) => {}
-                _ => continue,
-            }
-
             self.with_derived_obligation(obligation, |this| nested_goal.visit_with(this))?;
         }
 
diff --git a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
index 9f4ee54bd4c..9fbc1d64d74 100644
--- a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
+++ b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
@@ -300,7 +300,6 @@ impl<'a, 'tcx> InspectGoal<'a, 'tcx> {
                         inspect::ProbeKind::NormalizedSelfTyAssembly
                         | inspect::ProbeKind::UnsizeAssembly
                         | inspect::ProbeKind::Root { .. }
-                        | inspect::ProbeKind::TryNormalizeNonRigid { .. }
                         | inspect::ProbeKind::TraitCandidate { .. }
                         | inspect::ProbeKind::OpaqueTypeStorageLookup { .. }
                         | inspect::ProbeKind::RigidAlias { .. } => {
@@ -325,7 +324,6 @@ impl<'a, 'tcx> InspectGoal<'a, 'tcx> {
             // We add a candidate even for the root evaluation if there
             // is only one way to prove a given goal, e.g. for `WellFormed`.
             inspect::ProbeKind::Root { result }
-            | inspect::ProbeKind::TryNormalizeNonRigid { result }
             | inspect::ProbeKind::TraitCandidate { source: _, result }
             | inspect::ProbeKind::OpaqueTypeStorageLookup { result }
             | inspect::ProbeKind::RigidAlias { result } => {
diff --git a/compiler/rustc_trait_selection/src/solve/select.rs b/compiler/rustc_trait_selection/src/solve/select.rs
index b0b6274907d..4437fc5b029 100644
--- a/compiler/rustc_trait_selection/src/solve/select.rs
+++ b/compiler/rustc_trait_selection/src/solve/select.rs
@@ -175,8 +175,7 @@ fn to_selection<'tcx>(
                 span_bug!(span, "didn't expect to select an unknowable candidate")
             }
         },
-        ProbeKind::TryNormalizeNonRigid { result: _ }
-        | ProbeKind::NormalizedSelfTyAssembly
+        ProbeKind::NormalizedSelfTyAssembly
         | ProbeKind::UnsizeAssembly
         | ProbeKind::UpcastProjectionCompatibility
         | ProbeKind::OpaqueTypeStorageLookup { result: _ }
diff --git a/compiler/rustc_trait_selection/src/traits/util.rs b/compiler/rustc_trait_selection/src/traits/util.rs
index d30363ec158..15f5cf916a4 100644
--- a/compiler/rustc_trait_selection/src/traits/util.rs
+++ b/compiler/rustc_trait_selection/src/traits/util.rs
@@ -47,11 +47,11 @@ pub fn expand_trait_aliases<'tcx>(
                     queue.extend(
                         tcx.explicit_super_predicates_of(trait_pred.def_id())
                             .iter_identity_copied()
-                            .map(|(clause, span)| {
+                            .map(|(super_clause, span)| {
                                 let mut spans = spans.clone();
                                 spans.push(span);
                                 (
-                                    clause.instantiate_supertrait(
+                                    super_clause.instantiate_supertrait(
                                         tcx,
                                         clause.kind().rebind(trait_pred.trait_ref),
                                     ),
diff --git a/compiler/rustc_type_ir/src/solve/inspect.rs b/compiler/rustc_type_ir/src/solve/inspect.rs
index d0e618dc6f9..18fb71dd290 100644
--- a/compiler/rustc_type_ir/src/solve/inspect.rs
+++ b/compiler/rustc_type_ir/src/solve/inspect.rs
@@ -111,8 +111,6 @@ pub enum ProbeStep<I: Interner> {
 pub enum ProbeKind<I: Interner> {
     /// The root inference context while proving a goal.
     Root { result: QueryResult<I> },
-    /// Trying to normalize an alias by at least one step in `NormalizesTo`.
-    TryNormalizeNonRigid { result: QueryResult<I> },
     /// Probe entered when normalizing the self ty during candidate assembly
     NormalizedSelfTyAssembly,
     /// A candidate for proving a trait or alias-relate goal.
diff --git a/config.example.toml b/config.example.toml
index a4ba776b651..f5395375afe 100644
--- a/config.example.toml
+++ b/config.example.toml
@@ -87,10 +87,6 @@
 # Whether to build LLVM with support for it's gpu offload runtime.
 #offload = false
 
-# Indicates whether ccache is used when building LLVM. Set to `true` to use the first `ccache` in
-# PATH, or set an absolute path to use a specific version.
-#ccache = false
-
 # When true, link libstdc++ statically into the rustc_llvm.
 # This is useful if you don't want to use the dynamic version of that
 # library provided by LLVM.
@@ -424,6 +420,11 @@
 # What custom diff tool to use for displaying compiletest tests.
 #compiletest-diff-tool = <none>
 
+# Indicates whether ccache is used when building certain artifacts (e.g. LLVM).
+# Set to `true` to use the first `ccache` in PATH, or set an absolute path to use
+# a specific version.
+#ccache = false
+
 # =============================================================================
 # General install configuration options
 # =============================================================================
diff --git a/library/alloc/src/boxed.rs b/library/alloc/src/boxed.rs
index 8b38e6fc259..60e46dc7a09 100644
--- a/library/alloc/src/boxed.rs
+++ b/library/alloc/src/boxed.rs
@@ -280,13 +280,9 @@ impl<T> Box<T> {
     ///
     /// ```
     /// let mut five = Box::<u32>::new_uninit();
-    ///
-    /// let five = unsafe {
-    ///     // Deferred initialization:
-    ///     five.as_mut_ptr().write(5);
-    ///
-    ///     five.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// five.write(5);
+    /// let five = unsafe { five.assume_init() };
     ///
     /// assert_eq!(*five, 5)
     /// ```
@@ -367,13 +363,9 @@ impl<T> Box<T> {
     /// #![feature(allocator_api)]
     ///
     /// let mut five = Box::<u32>::try_new_uninit()?;
-    ///
-    /// let five = unsafe {
-    ///     // Deferred initialization:
-    ///     five.as_mut_ptr().write(5);
-    ///
-    ///     five.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// five.write(5);
+    /// let five = unsafe { five.assume_init() };
     ///
     /// assert_eq!(*five, 5);
     /// # Ok::<(), std::alloc::AllocError>(())
@@ -435,10 +427,8 @@ impl<T, A: Allocator> Box<T, A> {
         A: Allocator,
     {
         let mut boxed = Self::new_uninit_in(alloc);
-        unsafe {
-            boxed.as_mut_ptr().write(x);
-            boxed.assume_init()
-        }
+        boxed.write(x);
+        unsafe { boxed.assume_init() }
     }
 
     /// Allocates memory in the given allocator then places `x` into it,
@@ -463,10 +453,8 @@ impl<T, A: Allocator> Box<T, A> {
         A: Allocator,
     {
         let mut boxed = Self::try_new_uninit_in(alloc)?;
-        unsafe {
-            boxed.as_mut_ptr().write(x);
-            Ok(boxed.assume_init())
-        }
+        boxed.write(x);
+        unsafe { Ok(boxed.assume_init()) }
     }
 
     /// Constructs a new box with uninitialized contents in the provided allocator.
@@ -479,13 +467,9 @@ impl<T, A: Allocator> Box<T, A> {
     /// use std::alloc::System;
     ///
     /// let mut five = Box::<u32, _>::new_uninit_in(System);
-    ///
-    /// let five = unsafe {
-    ///     // Deferred initialization:
-    ///     five.as_mut_ptr().write(5);
-    ///
-    ///     five.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// five.write(5);
+    /// let five = unsafe { five.assume_init() };
     ///
     /// assert_eq!(*five, 5)
     /// ```
@@ -517,13 +501,9 @@ impl<T, A: Allocator> Box<T, A> {
     /// use std::alloc::System;
     ///
     /// let mut five = Box::<u32, _>::try_new_uninit_in(System)?;
-    ///
-    /// let five = unsafe {
-    ///     // Deferred initialization:
-    ///     five.as_mut_ptr().write(5);
-    ///
-    ///     five.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// five.write(5);
+    /// let five = unsafe { five.assume_init() };
     ///
     /// assert_eq!(*five, 5);
     /// # Ok::<(), std::alloc::AllocError>(())
@@ -669,15 +649,11 @@ impl<T> Box<[T]> {
     ///
     /// ```
     /// let mut values = Box::<[u32]>::new_uninit_slice(3);
-    ///
-    /// let values = unsafe {
-    ///     // Deferred initialization:
-    ///     values[0].as_mut_ptr().write(1);
-    ///     values[1].as_mut_ptr().write(2);
-    ///     values[2].as_mut_ptr().write(3);
-    ///
-    ///     values.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// values[0].write(1);
+    /// values[1].write(2);
+    /// values[2].write(3);
+    /// let values = unsafe {values.assume_init() };
     ///
     /// assert_eq!(*values, [1, 2, 3])
     /// ```
@@ -722,13 +698,11 @@ impl<T> Box<[T]> {
     /// #![feature(allocator_api)]
     ///
     /// let mut values = Box::<[u32]>::try_new_uninit_slice(3)?;
-    /// let values = unsafe {
-    ///     // Deferred initialization:
-    ///     values[0].as_mut_ptr().write(1);
-    ///     values[1].as_mut_ptr().write(2);
-    ///     values[2].as_mut_ptr().write(3);
-    ///     values.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// values[0].write(1);
+    /// values[1].write(2);
+    /// values[2].write(3);
+    /// let values = unsafe { values.assume_init() };
     ///
     /// assert_eq!(*values, [1, 2, 3]);
     /// # Ok::<(), std::alloc::AllocError>(())
@@ -814,15 +788,11 @@ impl<T, A: Allocator> Box<[T], A> {
     /// use std::alloc::System;
     ///
     /// let mut values = Box::<[u32], _>::new_uninit_slice_in(3, System);
-    ///
-    /// let values = unsafe {
-    ///     // Deferred initialization:
-    ///     values[0].as_mut_ptr().write(1);
-    ///     values[1].as_mut_ptr().write(2);
-    ///     values[2].as_mut_ptr().write(3);
-    ///
-    ///     values.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// values[0].write(1);
+    /// values[1].write(2);
+    /// values[2].write(3);
+    /// let values = unsafe { values.assume_init() };
     ///
     /// assert_eq!(*values, [1, 2, 3])
     /// ```
@@ -873,13 +843,11 @@ impl<T, A: Allocator> Box<[T], A> {
     /// use std::alloc::System;
     ///
     /// let mut values = Box::<[u32], _>::try_new_uninit_slice_in(3, System)?;
-    /// let values = unsafe {
-    ///     // Deferred initialization:
-    ///     values[0].as_mut_ptr().write(1);
-    ///     values[1].as_mut_ptr().write(2);
-    ///     values[2].as_mut_ptr().write(3);
-    ///     values.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// values[0].write(1);
+    /// values[1].write(2);
+    /// values[2].write(3);
+    /// let values = unsafe { values.assume_init() };
     ///
     /// assert_eq!(*values, [1, 2, 3]);
     /// # Ok::<(), std::alloc::AllocError>(())
@@ -959,13 +927,9 @@ impl<T, A: Allocator> Box<mem::MaybeUninit<T>, A> {
     ///
     /// ```
     /// let mut five = Box::<u32>::new_uninit();
-    ///
-    /// let five: Box<u32> = unsafe {
-    ///     // Deferred initialization:
-    ///     five.as_mut_ptr().write(5);
-    ///
-    ///     five.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// five.write(5);
+    /// let five: Box<u32> = unsafe { five.assume_init() };
     ///
     /// assert_eq!(*five, 5)
     /// ```
@@ -1030,15 +994,11 @@ impl<T, A: Allocator> Box<[mem::MaybeUninit<T>], A> {
     ///
     /// ```
     /// let mut values = Box::<[u32]>::new_uninit_slice(3);
-    ///
-    /// let values = unsafe {
-    ///     // Deferred initialization:
-    ///     values[0].as_mut_ptr().write(1);
-    ///     values[1].as_mut_ptr().write(2);
-    ///     values[2].as_mut_ptr().write(3);
-    ///
-    ///     values.assume_init()
-    /// };
+    /// // Deferred initialization:
+    /// values[0].write(1);
+    /// values[1].write(2);
+    /// values[2].write(3);
+    /// let values = unsafe { values.assume_init() };
     ///
     /// assert_eq!(*values, [1, 2, 3])
     /// ```
diff --git a/library/backtrace b/library/backtrace
-Subproject f8cc6ac9acc4e663ecd96f9bcf1ff4542636d1b
+Subproject 9d2c34e7e63afe1e71c333b247065e3b7ba4d88
diff --git a/library/core/src/ops/mod.rs b/library/core/src/ops/mod.rs
index 7b2ced2cc4b..627a875d9f7 100644
--- a/library/core/src/ops/mod.rs
+++ b/library/core/src/ops/mod.rs
@@ -182,6 +182,8 @@ pub use self::function::{Fn, FnMut, FnOnce};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::index::{Index, IndexMut};
 pub(crate) use self::index_range::IndexRange;
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+pub use self::range::IntoBounds;
 #[stable(feature = "inclusive_range", since = "1.26.0")]
 pub use self::range::{Bound, RangeBounds, RangeInclusive, RangeToInclusive};
 #[unstable(feature = "one_sided_range", issue = "69780")]
diff --git a/library/core/src/ops/range.rs b/library/core/src/ops/range.rs
index 42e07a0e51d..5580faefacc 100644
--- a/library/core/src/ops/range.rs
+++ b/library/core/src/ops/range.rs
@@ -831,6 +831,30 @@ pub trait RangeBounds<T: ?Sized> {
     }
 }
 
+/// Used to convert a range into start and end bounds, consuming the
+/// range by value.
+///
+/// `IntoBounds` is implemented by Rust’s built-in range types, produced
+/// by range syntax like `..`, `a..`, `..b`, `..=c`, `d..e`, or `f..=g`.
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+pub trait IntoBounds<T>: RangeBounds<T> {
+    /// Convert this range into the start and end bounds.
+    /// Returns `(start_bound, end_bound)`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(range_into_bounds)]
+    ///
+    /// use std::ops::Bound::*;
+    /// use std::ops::IntoBounds;
+    ///
+    /// assert_eq!((0..5).into_bounds(), (Included(0), Excluded(5)));
+    /// assert_eq!((..=7).into_bounds(), (Unbounded, Included(7)));
+    /// ```
+    fn into_bounds(self) -> (Bound<T>, Bound<T>);
+}
+
 use self::Bound::{Excluded, Included, Unbounded};
 
 #[stable(feature = "collections_range", since = "1.28.0")]
@@ -843,6 +867,13 @@ impl<T: ?Sized> RangeBounds<T> for RangeFull {
     }
 }
 
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+impl<T> IntoBounds<T> for RangeFull {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Unbounded, Unbounded)
+    }
+}
+
 #[stable(feature = "collections_range", since = "1.28.0")]
 impl<T> RangeBounds<T> for RangeFrom<T> {
     fn start_bound(&self) -> Bound<&T> {
@@ -853,6 +884,13 @@ impl<T> RangeBounds<T> for RangeFrom<T> {
     }
 }
 
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+impl<T> IntoBounds<T> for RangeFrom<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Included(self.start), Unbounded)
+    }
+}
+
 #[stable(feature = "collections_range", since = "1.28.0")]
 impl<T> RangeBounds<T> for RangeTo<T> {
     fn start_bound(&self) -> Bound<&T> {
@@ -863,6 +901,13 @@ impl<T> RangeBounds<T> for RangeTo<T> {
     }
 }
 
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+impl<T> IntoBounds<T> for RangeTo<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Unbounded, Excluded(self.end))
+    }
+}
+
 #[stable(feature = "collections_range", since = "1.28.0")]
 impl<T> RangeBounds<T> for Range<T> {
     fn start_bound(&self) -> Bound<&T> {
@@ -873,6 +918,13 @@ impl<T> RangeBounds<T> for Range<T> {
     }
 }
 
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+impl<T> IntoBounds<T> for Range<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Included(self.start), Excluded(self.end))
+    }
+}
+
 #[stable(feature = "collections_range", since = "1.28.0")]
 impl<T> RangeBounds<T> for RangeInclusive<T> {
     fn start_bound(&self) -> Bound<&T> {
@@ -889,6 +941,22 @@ impl<T> RangeBounds<T> for RangeInclusive<T> {
     }
 }
 
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+impl<T> IntoBounds<T> for RangeInclusive<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (
+            Included(self.start),
+            if self.exhausted {
+                // When the iterator is exhausted, we usually have start == end,
+                // but we want the range to appear empty, containing nothing.
+                Excluded(self.end)
+            } else {
+                Included(self.end)
+            },
+        )
+    }
+}
+
 #[stable(feature = "collections_range", since = "1.28.0")]
 impl<T> RangeBounds<T> for RangeToInclusive<T> {
     fn start_bound(&self) -> Bound<&T> {
@@ -899,6 +967,13 @@ impl<T> RangeBounds<T> for RangeToInclusive<T> {
     }
 }
 
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+impl<T> IntoBounds<T> for RangeToInclusive<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Unbounded, Included(self.end))
+    }
+}
+
 #[stable(feature = "collections_range", since = "1.28.0")]
 impl<T> RangeBounds<T> for (Bound<T>, Bound<T>) {
     fn start_bound(&self) -> Bound<&T> {
@@ -918,6 +993,13 @@ impl<T> RangeBounds<T> for (Bound<T>, Bound<T>) {
     }
 }
 
+#[unstable(feature = "range_into_bounds", issue = "136903")]
+impl<T> IntoBounds<T> for (Bound<T>, Bound<T>) {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        self
+    }
+}
+
 #[stable(feature = "collections_range", since = "1.28.0")]
 impl<'a, T: ?Sized + 'a> RangeBounds<T> for (Bound<&'a T>, Bound<&'a T>) {
     fn start_bound(&self) -> Bound<&T> {
diff --git a/library/core/src/prelude/mod.rs b/library/core/src/prelude/mod.rs
index 0ab97f5bbd5..590ffd64b5b 100644
--- a/library/core/src/prelude/mod.rs
+++ b/library/core/src/prelude/mod.rs
@@ -9,16 +9,7 @@
 
 #![stable(feature = "core_prelude", since = "1.4.0")]
 
-mod common;
-
-/// The first version of the prelude of The Rust Standard Library.
-///
-/// See the [module-level documentation](self) for more.
-#[stable(feature = "rust1", since = "1.0.0")]
-pub mod v1 {
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub use super::common::*;
-}
+pub mod v1;
 
 /// The 2015 version of the core prelude.
 ///
@@ -64,7 +55,8 @@ pub mod rust_2021 {
 #[stable(feature = "prelude_2024", since = "1.85.0")]
 pub mod rust_2024 {
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub use super::common::*;
+    #[doc(no_inline)]
+    pub use super::v1::*;
 
     #[stable(feature = "prelude_2021", since = "1.55.0")]
     #[doc(no_inline)]
diff --git a/library/core/src/prelude/common.rs b/library/core/src/prelude/v1.rs
index 8b116cecb52..50fd67e8395 100644
--- a/library/core/src/prelude/common.rs
+++ b/library/core/src/prelude/v1.rs
@@ -1,7 +1,9 @@
-//! Items common to the prelude of all editions.
+//! The first version of the core prelude.
 //!
 //! See the [module-level documentation](super) for more.
 
+#![stable(feature = "core_prelude", since = "1.4.0")]
+
 // No formatting: this file is nothing but re-exports, and their order is worth preserving.
 #![cfg_attr(rustfmt, rustfmt::skip)]
 
diff --git a/library/core/src/range.rs b/library/core/src/range.rs
index 6a62928873f..e94499065ac 100644
--- a/library/core/src/range.rs
+++ b/library/core/src/range.rs
@@ -31,7 +31,9 @@ pub use iter::{IterRange, IterRangeFrom, IterRangeInclusive};
 #[doc(inline)]
 pub use crate::iter::Step;
 #[doc(inline)]
-pub use crate::ops::{Bound, OneSidedRange, RangeBounds, RangeFull, RangeTo, RangeToInclusive};
+pub use crate::ops::{
+    Bound, IntoBounds, OneSidedRange, RangeBounds, RangeFull, RangeTo, RangeToInclusive,
+};
 
 /// A (half-open) range bounded inclusively below and exclusively above
 /// (`start..end` in a future edition).
@@ -175,6 +177,14 @@ impl<T> RangeBounds<T> for Range<&T> {
     }
 }
 
+// #[unstable(feature = "range_into_bounds", issue = "136903")]
+#[unstable(feature = "new_range_api", issue = "125687")]
+impl<T> IntoBounds<T> for Range<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Included(self.start), Excluded(self.end))
+    }
+}
+
 #[unstable(feature = "new_range_api", issue = "125687")]
 impl<T> From<Range<T>> for legacy::Range<T> {
     #[inline]
@@ -343,6 +353,14 @@ impl<T> RangeBounds<T> for RangeInclusive<&T> {
     }
 }
 
+// #[unstable(feature = "range_into_bounds", issue = "136903")]
+#[unstable(feature = "new_range_api", issue = "125687")]
+impl<T> IntoBounds<T> for RangeInclusive<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Included(self.start), Included(self.end))
+    }
+}
+
 #[unstable(feature = "new_range_api", issue = "125687")]
 impl<T> From<RangeInclusive<T>> for legacy::RangeInclusive<T> {
     #[inline]
@@ -479,6 +497,14 @@ impl<T> RangeBounds<T> for RangeFrom<&T> {
     }
 }
 
+// #[unstable(feature = "range_into_bounds", issue = "136903")]
+#[unstable(feature = "new_range_api", issue = "125687")]
+impl<T> IntoBounds<T> for RangeFrom<T> {
+    fn into_bounds(self) -> (Bound<T>, Bound<T>) {
+        (Included(self.start), Unbounded)
+    }
+}
+
 #[unstable(feature = "new_range_api", issue = "125687")]
 impl<T> From<RangeFrom<T>> for legacy::RangeFrom<T> {
     #[inline]
diff --git a/library/core/src/slice/iter/macros.rs b/library/core/src/slice/iter/macros.rs
index 830debe02ea..45e320e66bc 100644
--- a/library/core/src/slice/iter/macros.rs
+++ b/library/core/src/slice/iter/macros.rs
@@ -30,7 +30,7 @@ macro_rules! if_zst {
             $zst_body
         } else {
             // SAFETY: for non-ZSTs, the type invariant ensures it cannot be null
-            let $end = unsafe { *(&raw const $this.end_or_len).cast::<NonNull<T>>() };
+            let $end = unsafe { mem::transmute::<*const T, NonNull<T>>($this.end_or_len) };
             $other_body
         }
     }};
diff --git a/library/std/src/io/util.rs b/library/std/src/io/util.rs
index 424f862090f..cb3f864fd4e 100644
--- a/library/std/src/io/util.rs
+++ b/library/std/src/io/util.rs
@@ -7,6 +7,7 @@ use crate::fmt;
 use crate::io::{
     self, BorrowedCursor, BufRead, IoSlice, IoSliceMut, Read, Seek, SeekFrom, SizeHint, Write,
 };
+use crate::mem::MaybeUninit;
 
 /// `Empty` ignores any data written via [`Write`], and will always be empty
 /// (returning zero bytes) when read via [`Read`].
@@ -182,35 +183,26 @@ pub const fn repeat(byte: u8) -> Repeat {
 impl Read for Repeat {
     #[inline]
     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        for slot in &mut *buf {
-            *slot = self.byte;
-        }
+        buf.fill(self.byte);
         Ok(buf.len())
     }
 
+    #[inline]
     fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
-        for slot in &mut *buf {
-            *slot = self.byte;
-        }
+        buf.fill(self.byte);
         Ok(())
     }
 
+    #[inline]
     fn read_buf(&mut self, mut buf: BorrowedCursor<'_>) -> io::Result<()> {
-        // SAFETY: No uninit bytes are being written
-        for slot in unsafe { buf.as_mut() } {
-            slot.write(self.byte);
-        }
-
-        let remaining = buf.capacity();
-
-        // SAFETY: the entire unfilled portion of buf has been initialized
-        unsafe {
-            buf.advance_unchecked(remaining);
-        }
-
+        // SAFETY: No uninit bytes are being written.
+        MaybeUninit::fill(unsafe { buf.as_mut() }, self.byte);
+        // SAFETY: the entire unfilled portion of buf has been initialized.
+        unsafe { buf.advance_unchecked(buf.capacity()) };
         Ok(())
     }
 
+    #[inline]
     fn read_buf_exact(&mut self, buf: BorrowedCursor<'_>) -> io::Result<()> {
         self.read_buf(buf)
     }
diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index 7d7d192c4dd..750116c6269 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -302,6 +302,7 @@
 #![feature(link_cfg)]
 #![feature(linkage)]
 #![feature(macro_metavar_expr_concat)]
+#![feature(maybe_uninit_fill)]
 #![feature(min_specialization)]
 #![feature(must_not_suspend)]
 #![feature(needs_panic_runtime)]
diff --git a/library/std/src/prelude/mod.rs b/library/std/src/prelude/mod.rs
index 14e6c2715df..992a9207a72 100644
--- a/library/std/src/prelude/mod.rs
+++ b/library/std/src/prelude/mod.rs
@@ -111,16 +111,7 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-mod common;
-
-/// The first version of the prelude of The Rust Standard Library.
-///
-/// See the [module-level documentation](self) for more.
-#[stable(feature = "rust1", since = "1.0.0")]
-pub mod v1 {
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub use super::common::*;
-}
+pub mod v1;
 
 /// The 2015 version of the prelude of The Rust Standard Library.
 ///
@@ -162,7 +153,8 @@ pub mod rust_2021 {
 #[stable(feature = "prelude_2024", since = "1.85.0")]
 pub mod rust_2024 {
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub use super::common::*;
+    #[doc(no_inline)]
+    pub use super::v1::*;
 
     #[stable(feature = "prelude_2024", since = "1.85.0")]
     #[doc(no_inline)]
diff --git a/library/std/src/prelude/common.rs b/library/std/src/prelude/v1.rs
index 0f2d8334fca..5b324b2e916 100644
--- a/library/std/src/prelude/common.rs
+++ b/library/std/src/prelude/v1.rs
@@ -1,7 +1,9 @@
-//! Items common to the prelude of all editions.
+//! The first version of the prelude of The Rust Standard Library.
 //!
 //! See the [module-level documentation](super) for more.
 
+#![stable(feature = "rust1", since = "1.0.0")]
+
 // No formatting: this file is nothing but re-exports, and their order is worth preserving.
 #![cfg_attr(rustfmt, rustfmt::skip)]
 
diff --git a/library/std/src/sys/pal/unix/sync/mutex.rs b/library/std/src/sys/pal/unix/sync/mutex.rs
index 8ff6c3d3d15..557e70af94b 100644
--- a/library/std/src/sys/pal/unix/sync/mutex.rs
+++ b/library/std/src/sys/pal/unix/sync/mutex.rs
@@ -111,9 +111,9 @@ impl Drop for Mutex {
         // `PTHREAD_MUTEX_INITIALIZER`, which is valid at all locations. Thus,
         // this call always destroys a valid mutex.
         let r = unsafe { libc::pthread_mutex_destroy(self.raw()) };
-        if cfg!(target_os = "dragonfly") {
-            // On DragonFly pthread_mutex_destroy() returns EINVAL if called on a
-            // mutex that was just initialized with libc::PTHREAD_MUTEX_INITIALIZER.
+        if cfg!(any(target_os = "aix", target_os = "dragonfly")) {
+            // On AIX and DragonFly pthread_mutex_destroy() returns EINVAL if called
+            // on a mutex that was just initialized with libc::PTHREAD_MUTEX_INITIALIZER.
             // Once it is used (locked/unlocked) or pthread_mutex_init() is called,
             // this behaviour no longer occurs.
             debug_assert!(r == 0 || r == libc::EINVAL);
diff --git a/library/std/src/sys/pal/unix/thread.rs b/library/std/src/sys/pal/unix/thread.rs
index 479021af040..69c99782f0b 100644
--- a/library/std/src/sys/pal/unix/thread.rs
+++ b/library/std/src/sys/pal/unix/thread.rs
@@ -144,7 +144,7 @@ impl Thread {
                     const TASK_COMM_LEN: usize = 16;
                     let name = truncate_cstr::<{ TASK_COMM_LEN }>(name);
                 } else {
-                    // FreeBSD, DragonFly, FreeBSD and NuttX do not enforce length limits.
+                    // FreeBSD, DragonFly BSD and NuttX do not enforce length limits.
                 }
             };
             // Available since glibc 2.12, musl 1.1.16, and uClibc 1.0.20 for Linux,
diff --git a/src/bootstrap/Cargo.lock b/src/bootstrap/Cargo.lock
index d2f3c7f36ca..a47f3af60cb 100644
--- a/src/bootstrap/Cargo.lock
+++ b/src/bootstrap/Cargo.lock
@@ -59,6 +59,7 @@ dependencies = [
  "termcolor",
  "toml",
  "tracing",
+ "tracing-chrome",
  "tracing-subscriber",
  "tracing-tree",
  "walkdir",
@@ -728,6 +729,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "tracing-chrome"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf0a738ed5d6450a9fb96e86a23ad808de2b727fd1394585da5cdd6788ffe724"
+dependencies = [
+ "serde_json",
+ "tracing-core",
+ "tracing-subscriber",
+]
+
+[[package]]
 name = "tracing-core"
 version = "0.1.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/src/bootstrap/Cargo.toml b/src/bootstrap/Cargo.toml
index d7afcc7f27d..ed51862390d 100644
--- a/src/bootstrap/Cargo.toml
+++ b/src/bootstrap/Cargo.toml
@@ -7,7 +7,7 @@ default-run = "bootstrap"
 
 [features]
 build-metrics = ["sysinfo"]
-tracing = ["dep:tracing", "dep:tracing-subscriber", "dep:tracing-tree"]
+tracing = ["dep:tracing", "dep:tracing-chrome", "dep:tracing-subscriber", "dep:tracing-tree"]
 
 [lib]
 path = "src/lib.rs"
@@ -67,6 +67,7 @@ sysinfo = { version = "0.33.0", default-features = false, optional = true, featu
 
 # Dependencies needed by the `tracing` feature
 tracing = { version = "0.1", optional = true, features = ["attributes"] }
+tracing-chrome = { version = "0.7", optional = true }
 tracing-subscriber = { version = "0.3", optional = true, features = ["env-filter", "fmt", "registry", "std"] }
 tracing-tree = { version = "0.4.0", optional = true }
 
diff --git a/src/bootstrap/configure.py b/src/bootstrap/configure.py
index a86c20d46bd..ac971a64d7c 100755
--- a/src/bootstrap/configure.py
+++ b/src/bootstrap/configure.py
@@ -44,10 +44,14 @@ o("optimize-tests", "rust.optimize-tests", "build tests with optimizations")
 o("verbose-tests", "rust.verbose-tests", "enable verbose output when running tests")
 o(
     "ccache",
-    "llvm.ccache",
-    "invoke gcc/clang via ccache to reuse object files between builds",
+    "build.ccache",
+    "invoke gcc/clang/rustc via ccache to reuse object files between builds",
+)
+o(
+    "sccache",
+    None,
+    "invoke gcc/clang/rustc via sccache to reuse object files between builds",
 )
-o("sccache", None, "invoke gcc/clang via sccache to reuse object files between builds")
 o("local-rust", None, "use an installed rustc rather than downloading a snapshot")
 v("local-rust-root", None, "set prefix for local rust binary")
 o(
@@ -510,7 +514,7 @@ def apply_args(known_args, option_checking, config):
         build_triple = build(known_args)
 
         if option.name == "sccache":
-            set("llvm.ccache", "sccache", config)
+            set("build.ccache", "sccache", config)
         elif option.name == "local-rust":
             for path in os.environ["PATH"].split(os.pathsep):
                 if os.path.exists(path + "/rustc"):
diff --git a/src/bootstrap/src/bin/main.rs b/src/bootstrap/src/bin/main.rs
index 441674936c6..38b380e3db8 100644
--- a/src/bootstrap/src/bin/main.rs
+++ b/src/bootstrap/src/bin/main.rs
@@ -21,7 +21,7 @@ use tracing::instrument;
 #[cfg_attr(feature = "tracing", instrument(level = "trace", name = "main"))]
 fn main() {
     #[cfg(feature = "tracing")]
-    setup_tracing();
+    let _guard = setup_tracing();
 
     let args = env::args().skip(1).collect::<Vec<_>>();
 
@@ -210,7 +210,7 @@ fn check_version(config: &Config) -> Option<String> {
 // - `tracing`'s `#[instrument(..)]` macro will need to be gated like `#![cfg_attr(feature =
 //   "tracing", instrument(..))]`.
 #[cfg(feature = "tracing")]
-fn setup_tracing() {
+fn setup_tracing() -> impl Drop {
     use tracing_subscriber::EnvFilter;
     use tracing_subscriber::layer::SubscriberExt;
 
@@ -218,7 +218,17 @@ fn setup_tracing() {
     // cf. <https://docs.rs/tracing-tree/latest/tracing_tree/struct.HierarchicalLayer.html>.
     let layer = tracing_tree::HierarchicalLayer::default().with_targets(true).with_indent_amount(2);
 
-    let registry = tracing_subscriber::registry().with(filter).with(layer);
+    let mut chrome_layer = tracing_chrome::ChromeLayerBuilder::new().include_args(true);
+
+    // Writes the Chrome profile to trace-<unix-timestamp>.json if enabled
+    if !env::var("BOOTSTRAP_PROFILE").is_ok_and(|v| v == "1") {
+        chrome_layer = chrome_layer.writer(io::sink());
+    }
+
+    let (chrome_layer, _guard) = chrome_layer.build();
+
+    let registry = tracing_subscriber::registry().with(filter).with(layer).with(chrome_layer);
 
     tracing::subscriber::set_global_default(registry).unwrap();
+    _guard
 }
diff --git a/src/bootstrap/src/core/build_steps/compile.rs b/src/bootstrap/src/core/build_steps/compile.rs
index a2375842bdd..479327d6369 100644
--- a/src/bootstrap/src/core/build_steps/compile.rs
+++ b/src/bootstrap/src/core/build_steps/compile.rs
@@ -1092,9 +1092,10 @@ pub fn rustc_cargo(
 
     // We want to link against registerEnzyme and in the future we want to use additional
     // functionality from Enzyme core. For that we need to link against Enzyme.
-    // FIXME(ZuseZ4): Get the LLVM version number automatically instead of hardcoding it.
     if builder.config.llvm_enzyme {
-        cargo.rustflag("-l").rustflag("Enzyme-19");
+        let llvm_config = builder.llvm_config(builder.config.build).unwrap();
+        let llvm_version_major = llvm::get_llvm_version_major(builder, &llvm_config);
+        cargo.rustflag("-l").rustflag(&format!("Enzyme-{llvm_version_major}"));
     }
 
     // Building with protected visibility reduces the number of dynamic relocations needed, giving
@@ -2234,6 +2235,10 @@ pub fn stream_cargo(
     cb: &mut dyn FnMut(CargoMessage<'_>),
 ) -> bool {
     let mut cmd = cargo.into_cmd();
+
+    #[cfg(feature = "tracing")]
+    let _run_span = crate::trace_cmd!(cmd);
+
     let cargo = cmd.as_command_mut();
     // Instruct Cargo to give us json messages on stdout, critically leaving
     // stderr as piped so we can get those pretty colors.
diff --git a/src/bootstrap/src/core/build_steps/llvm.rs b/src/bootstrap/src/core/build_steps/llvm.rs
index ee60dbef7b9..18da0e8252b 100644
--- a/src/bootstrap/src/core/build_steps/llvm.rs
+++ b/src/bootstrap/src/core/build_steps/llvm.rs
@@ -571,10 +571,7 @@ impl Step for Llvm {
 
         // Helper to find the name of LLVM's shared library on darwin and linux.
         let find_llvm_lib_name = |extension| {
-            let version =
-                command(&res.llvm_config).arg("--version").run_capture_stdout(builder).stdout();
-            let major = version.split('.').next().unwrap();
-
+            let major = get_llvm_version_major(builder, &res.llvm_config);
             match &llvm_version_suffix {
                 Some(version_suffix) => format!("libLLVM-{major}{version_suffix}.{extension}"),
                 None => format!("libLLVM-{major}.{extension}"),
@@ -624,12 +621,22 @@ impl Step for Llvm {
     }
 }
 
+pub fn get_llvm_version(builder: &Builder<'_>, llvm_config: &Path) -> String {
+    command(llvm_config).arg("--version").run_capture_stdout(builder).stdout().trim().to_owned()
+}
+
+pub fn get_llvm_version_major(builder: &Builder<'_>, llvm_config: &Path) -> u8 {
+    let version = get_llvm_version(builder, llvm_config);
+    let major_str = version.split_once('.').expect("Failed to parse LLVM version").0;
+    major_str.parse().unwrap()
+}
+
 fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
     if builder.config.dry_run() {
         return;
     }
 
-    let version = command(llvm_config).arg("--version").run_capture_stdout(builder).stdout();
+    let version = get_llvm_version(builder, llvm_config);
     let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
     if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
         if major >= 18 {
diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index 509875a469f..26ed0e5deaa 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -12,6 +12,7 @@ use clap_complete::shells;
 
 use crate::core::build_steps::compile::run_cargo;
 use crate::core::build_steps::doc::DocumentationFormat;
+use crate::core::build_steps::llvm::get_llvm_version;
 use crate::core::build_steps::synthetic_targets::MirOptPanicAbortSyntheticTarget;
 use crate::core::build_steps::tool::{self, SourceType, Tool};
 use crate::core::build_steps::toolstate::ToolState;
@@ -1845,6 +1846,14 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
             }
         }
 
+        // FIXME(136096): on macOS, we get linker warnings about duplicate `-lm` flags.
+        // NOTE: `stage > 1` here because `test --stage 1 ui-fulldeps` is a hack that compiles
+        // with stage 0, but links the tests against stage 1.
+        // cfg(bootstrap) - remove only the `stage > 1` check, leave everything else.
+        if suite == "ui-fulldeps" && compiler.stage > 1 && target.ends_with("darwin") {
+            flags.push("-Alinker_messages".into());
+        }
+
         let mut hostflags = flags.clone();
         hostflags.push(format!("-Lnative={}", builder.test_helpers_out(compiler.host).display()));
         hostflags.extend(linker_flags(builder, compiler.host, LldThreads::No));
@@ -1852,12 +1861,6 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
         let mut targetflags = flags;
         targetflags.push(format!("-Lnative={}", builder.test_helpers_out(target).display()));
 
-        // FIXME: on macOS, we get linker warnings about duplicate `-lm` flags. We should investigate why this happens.
-        if suite == "ui-fulldeps" && target.ends_with("darwin") {
-            hostflags.push("-Alinker_messages".into());
-            targetflags.push("-Alinker_messages".into());
-        }
-
         for flag in hostflags {
             cmd.arg("--host-rustcflags").arg(flag);
         }
@@ -1945,8 +1948,7 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
             let llvm::LlvmResult { llvm_config, .. } =
                 builder.ensure(llvm::Llvm { target: builder.config.build });
             if !builder.config.dry_run() {
-                let llvm_version =
-                    command(&llvm_config).arg("--version").run_capture_stdout(builder).stdout();
+                let llvm_version = get_llvm_version(builder, &llvm_config);
                 let llvm_components =
                     command(&llvm_config).arg("--components").run_capture_stdout(builder).stdout();
                 // Remove trailing newline from llvm-config output.
@@ -1969,13 +1971,12 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
             if !builder.config.dry_run() && suite.ends_with("fulldeps") {
                 let llvm_libdir =
                     command(&llvm_config).arg("--libdir").run_capture_stdout(builder).stdout();
-                let mut rustflags = env::var("RUSTFLAGS").unwrap_or_default();
-                if target.is_msvc() {
-                    rustflags.push_str(&format!("-Clink-arg=-LIBPATH:{llvm_libdir}"));
+                let link_llvm = if target.is_msvc() {
+                    format!("-Clink-arg=-LIBPATH:{llvm_libdir}")
                 } else {
-                    rustflags.push_str(&format!("-Clink-arg=-L{llvm_libdir}"));
-                }
-                cmd.env("RUSTFLAGS", rustflags);
+                    format!("-Clink-arg=-L{llvm_libdir}")
+                };
+                cmd.arg("--host-rustcflags").arg(link_llvm);
             }
 
             if !builder.config.dry_run() && matches!(mode, "run-make" | "coverage-run") {
diff --git a/src/bootstrap/src/core/builder/mod.rs b/src/bootstrap/src/core/builder/mod.rs
index 8e767a8dcc6..ecec589fc32 100644
--- a/src/bootstrap/src/core/builder/mod.rs
+++ b/src/bootstrap/src/core/builder/mod.rs
@@ -1431,7 +1431,7 @@ impl<'a> Builder<'a> {
     ///
     /// Note that this returns `None` if LLVM is disabled, or if we're in a
     /// check build or dry-run, where there's no need to build all of LLVM.
-    fn llvm_config(&self, target: TargetSelection) -> Option<PathBuf> {
+    pub fn llvm_config(&self, target: TargetSelection) -> Option<PathBuf> {
         if self.config.llvm_enabled(target) && self.kind != Kind::Check && !self.config.dry_run() {
             let llvm::LlvmResult { llvm_config, .. } = self.ensure(llvm::Llvm { target });
             if llvm_config.is_file() {
diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index d3ed7ecddd3..62625fc3660 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -935,6 +935,7 @@ define_config! {
         optimized_compiler_builtins: Option<bool> = "optimized-compiler-builtins",
         jobs: Option<u32> = "jobs",
         compiletest_diff_tool: Option<String> = "compiletest-diff-tool",
+        ccache: Option<StringOrBool> = "ccache",
     }
 }
 
@@ -961,6 +962,7 @@ define_config! {
         tests: Option<bool> = "tests",
         enzyme: Option<bool> = "enzyme",
         plugins: Option<bool> = "plugins",
+        // FIXME: Remove this field at Q2 2025, it has been replaced by build.ccache
         ccache: Option<StringOrBool> = "ccache",
         static_libstdcpp: Option<bool> = "static-libstdcpp",
         libzstd: Option<bool> = "libzstd",
@@ -1622,6 +1624,7 @@ impl Config {
             optimized_compiler_builtins,
             jobs,
             compiletest_diff_tool,
+            mut ccache,
         } = toml.build.unwrap_or_default();
 
         config.jobs = Some(threads_from_config(flags.jobs.unwrap_or(jobs.unwrap_or(0))));
@@ -2006,7 +2009,7 @@ impl Config {
                 tests,
                 enzyme,
                 plugins,
-                ccache,
+                ccache: llvm_ccache,
                 static_libstdcpp,
                 libzstd,
                 ninja,
@@ -2029,13 +2032,11 @@ impl Config {
                 download_ci_llvm,
                 build_config,
             } = llvm;
-            match ccache {
-                Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
-                Some(StringOrBool::Bool(true)) => {
-                    config.ccache = Some("ccache".to_string());
-                }
-                Some(StringOrBool::Bool(false)) | None => {}
+            if llvm_ccache.is_some() {
+                eprintln!("Warning: llvm.ccache is deprecated. Use build.ccache instead.");
             }
+
+            ccache = ccache.or(llvm_ccache);
             set(&mut config.ninja_in_file, ninja);
             llvm_tests = tests;
             llvm_enzyme = enzyme;
@@ -2189,6 +2190,14 @@ impl Config {
             }
         }
 
+        match ccache {
+            Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
+            Some(StringOrBool::Bool(true)) => {
+                config.ccache = Some("ccache".to_string());
+            }
+            Some(StringOrBool::Bool(false)) | None => {}
+        }
+
         if config.llvm_from_ci {
             let triple = &config.build.triple;
             let ci_llvm_bin = config.ci_llvm_root().join("bin");
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index 665ab117002..7cd8aacf0d6 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -905,6 +905,9 @@ impl Build {
             return CommandOutput::default();
         }
 
+        #[cfg(feature = "tracing")]
+        let _run_span = trace_cmd!(command);
+
         let created_at = command.get_created_location();
         let executed_at = std::panic::Location::caller();
 
diff --git a/src/bootstrap/src/utils/change_tracker.rs b/src/bootstrap/src/utils/change_tracker.rs
index 6f62df28e49..9b23cf1843e 100644
--- a/src/bootstrap/src/utils/change_tracker.rs
+++ b/src/bootstrap/src/utils/change_tracker.rs
@@ -345,4 +345,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Info,
         summary: "Rustdoc now respects the value of rust.lto.",
     },
+    ChangeInfo {
+        change_id: 136941,
+        severity: ChangeSeverity::Info,
+        summary: "The llvm.ccache option has moved to build.ccache. llvm.ccache is now deprecated.",
+    },
 ];
diff --git a/src/bootstrap/src/utils/exec.rs b/src/bootstrap/src/utils/exec.rs
index 1902dcd3962..7eb9ab96c8a 100644
--- a/src/bootstrap/src/utils/exec.rs
+++ b/src/bootstrap/src/utils/exec.rs
@@ -329,3 +329,25 @@ impl Default for CommandOutput {
         }
     }
 }
+
+/// Helper trait to format both Command and BootstrapCommand as a short execution line,
+/// without all the other details (e.g. environment variables).
+#[allow(unused)]
+pub trait FormatShortCmd {
+    fn format_short_cmd(&self) -> String;
+}
+
+impl FormatShortCmd for BootstrapCommand {
+    fn format_short_cmd(&self) -> String {
+        self.command.format_short_cmd()
+    }
+}
+
+impl FormatShortCmd for Command {
+    fn format_short_cmd(&self) -> String {
+        let program = Path::new(self.get_program());
+        let mut line = vec![program.file_name().unwrap().to_str().unwrap()];
+        line.extend(self.get_args().map(|arg| arg.to_str().unwrap()));
+        line.join(" ")
+    }
+}
diff --git a/src/bootstrap/src/utils/helpers.rs b/src/bootstrap/src/utils/helpers.rs
index a1b1748c85b..3fee397da09 100644
--- a/src/bootstrap/src/utils/helpers.rs
+++ b/src/bootstrap/src/utils/helpers.rs
@@ -265,6 +265,9 @@ pub fn make(host: &str) -> PathBuf {
 
 #[track_caller]
 pub fn output(cmd: &mut Command) -> String {
+    #[cfg(feature = "tracing")]
+    let _run_span = crate::trace_cmd!(cmd);
+
     let output = match cmd.stderr(Stdio::inherit()).output() {
         Ok(status) => status,
         Err(e) => fail(&format!("failed to execute command: {cmd:?}\nERROR: {e}")),
diff --git a/src/bootstrap/src/utils/tracing.rs b/src/bootstrap/src/utils/tracing.rs
index e89decf9e55..99849341dc3 100644
--- a/src/bootstrap/src/utils/tracing.rs
+++ b/src/bootstrap/src/utils/tracing.rs
@@ -47,3 +47,20 @@ macro_rules! error {
         ::tracing::error!($($tokens)*)
     }
 }
+
+#[macro_export]
+macro_rules! trace_cmd {
+    ($cmd:expr) => {
+        {
+            use $crate::utils::exec::FormatShortCmd;
+
+            ::tracing::span!(
+                target: "COMMAND",
+                ::tracing::Level::TRACE,
+                "executing command",
+                cmd = $cmd.format_short_cmd(),
+                full_cmd = ?$cmd
+            ).entered()
+        }
+    };
+}
diff --git a/src/ci/github-actions/jobs.yml b/src/ci/github-actions/jobs.yml
index c08104e796b..729cc70cb8e 100644
--- a/src/ci/github-actions/jobs.yml
+++ b/src/ci/github-actions/jobs.yml
@@ -168,10 +168,10 @@ auto:
     <<: *job-linux-4c
 
   - name: dist-loongarch64-linux
-    <<: *job-linux-4c-largedisk
+    <<: *job-linux-4c
 
   - name: dist-loongarch64-musl
-    <<: *job-linux-4c-largedisk
+    <<: *job-linux-4c
 
   - name: dist-ohos
     <<: *job-linux-4c
@@ -294,9 +294,7 @@ auto:
     <<: *job-linux-4c
 
   - name: x86_64-gnu-debug
-    # This seems to be needed because a full stage 2 build + run-make tests
-    # overwhelms the storage capacity of the standard 4c runner.
-    <<: *job-linux-4c-largedisk
+    <<: *job-linux-4c
 
   - name: x86_64-gnu-distcheck
     <<: *job-linux-8c
diff --git a/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md b/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md
index 3f907e85dd6..04fa5b204dd 100644
--- a/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md
+++ b/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md
@@ -121,6 +121,14 @@ For `#[instrument]`, it's recommended to:
 - Explicitly pick an instrumentation name via `name = ".."` to distinguish between e.g. `run` of different steps.
 - Take care to not cause diverging behavior via tracing, e.g. building extra things only when tracing infra is enabled.
 
+### Profiling bootstrap
+
+You can use the `COMMAND` tracing target to trace execution of most commands spawned by bootstrap. If you also use the `BOOTSTRAP_PROFILE=1` environment variable, bootstrap will generate a Chrome JSON trace file, which can be visualized in Chrome's `chrome://tracing` page or on https://ui.perfetto.dev.
+
+```bash
+$ BOOTSTRAP_TRACING=COMMAND=trace BOOTSTRAP_PROFILE=1 ./x build library
+```
+
 ### rust-analyzer integration?
 
 Unfortunately, because bootstrap is a `rust-analyzer.linkedProjects`, you can't ask r-a to check/build bootstrap itself with `tracing` feature enabled to get relevant completions, due to lack of support as described in <https://github.com/rust-lang/rust-analyzer/issues/8521>.
diff --git a/src/doc/rustc/src/codegen-options/index.md b/src/doc/rustc/src/codegen-options/index.md
index f45217c69ff..8c1769a8c77 100644
--- a/src/doc/rustc/src/codegen-options/index.md
+++ b/src/doc/rustc/src/codegen-options/index.md
@@ -368,7 +368,7 @@ This flag controls the optimization level.
 * `s`: optimize for binary size.
 * `z`: optimize for binary size, but also turn off loop vectorization.
 
-Note: The [`-O` flag][option-o-optimize] is an alias for `-C opt-level=2`.
+Note: The [`-O` flag][option-o-optimize] is an alias for `-C opt-level=3`.
 
 The default is `0`.
 
diff --git a/src/doc/rustc/src/command-line-arguments.md b/src/doc/rustc/src/command-line-arguments.md
index 0942b5ebfee..9dd2e7de1b3 100644
--- a/src/doc/rustc/src/command-line-arguments.md
+++ b/src/doc/rustc/src/command-line-arguments.md
@@ -308,7 +308,7 @@ A synonym for [`-C debuginfo=2`](codegen-options/index.md#debuginfo).
 <a id="option-o-optimize"></a>
 ## `-O`: optimize your code
 
-A synonym for [`-C opt-level=2`](codegen-options/index.md#opt-level).
+A synonym for [`-C opt-level=3`](codegen-options/index.md#opt-level).
 
 <a id="option-o-output"></a>
 ## `-o`: filename of the output
diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index f39c0e4a314..4f5f8f92264 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -41,6 +41,19 @@ xmlns="http://www.w3.org/2000/svg" fill="black" height="18px">\
 	--font-family: "Source Serif 4", NanumBarunGothic, serif;
 	--font-family-code: "Source Code Pro", monospace;
 	--line-number-padding: 4px;
+	/* scraped examples icons (34x33px) */
+	--prev-arrow-image: url('data:image/svg+xml,<svg width="16" height="16" viewBox="0 0 16 16" \
+	enable-background="new 0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path fill="none" \
+	d="M8,3l-4,5l4,5m-4,-5h10" stroke="black" stroke-width="2"/></svg>');
+	--next-arrow-image: url('data:image/svg+xml,<svg width="16" height="16" viewBox="0 0 16 16" \
+	enable-background="new 0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path fill="none" \
+	d="M8,3l4,5l-4,5m4,-5h-10" stroke="black" stroke-width="2"/></svg>');
+	--expand-arrow-image: url('data:image/svg+xml,<svg width="16" height="16" viewBox="0 0 16 16" \
+	enable-background="new 0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path fill="none" \
+	d="M3,10l4,4l4,-4m-4,4M3,7l4,-4l4,4" stroke="black" stroke-width="2"/></svg>');
+	--collapse-arrow-image: url('data:image/svg+xml,<svg width="16" height="16" viewBox="0 0 16 16" \
+	enable-background="new 0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path fill="none" \
+	d="M3,8l4,4l4,-4m-4,4M3,4l4,4l4,-4" stroke="black" stroke-width="2"/></svg>');
 }
 
 :root.sans-serif {
@@ -1729,7 +1742,10 @@ instead, we check that it's not a "finger" cursor.
 	padding: 2px 0 0 4px;
 }
 .example-wrap .button-holder .copy-button::before,
-.example-wrap .test-arrow::before {
+.example-wrap .test-arrow::before,
+.example-wrap .button-holder .prev::before,
+.example-wrap .button-holder .next::before,
+.example-wrap .button-holder .expand::before {
 	filter: var(--copy-path-img-filter);
 }
 .example-wrap .button-holder .copy-button::before {
@@ -1744,6 +1760,24 @@ instead, we check that it's not a "finger" cursor.
 	padding-right: 5px;
 }
 
+.example-wrap .button-holder .prev,
+.example-wrap .button-holder .next,
+.example-wrap .button-holder .expand {
+	line-height: 0px;
+}
+.example-wrap .button-holder .prev::before {
+	content: var(--prev-arrow-image);
+}
+.example-wrap .button-holder .next::before {
+	content: var(--next-arrow-image);
+}
+.example-wrap .button-holder .expand::before {
+	content: var(--expand-arrow-image);
+}
+.example-wrap .button-holder .expand.collapse::before {
+	content: var(--collapse-arrow-image);
+}
+
 .code-attribute {
 	font-weight: 300;
 	color: var(--code-attribute-color);
@@ -2012,6 +2046,13 @@ button#toggle-all-docs:before {
 	filter: var(--settings-menu-filter);
 }
 
+button#toggle-all-docs.will-expand:before {
+	/* Custom arrow icon */
+	content: url('data:image/svg+xml,<svg width="18" height="18" viewBox="0 0 12 12" \
+	enable-background="new 0 0 12 12" xmlns="http://www.w3.org/2000/svg">\
+	<path d="M2,5l4,-4l4,4M2,7l4,4l4,-4" stroke="black" fill="none" stroke-width="2px"/></svg>');
+}
+
 #help-button > a:before {
 	/* Question mark with circle */
 	content: url('data:image/svg+xml,<svg width="18" height="18" viewBox="0 0 12 12" \
diff --git a/src/librustdoc/html/static/js/scrape-examples.js b/src/librustdoc/html/static/js/scrape-examples.js
index 99cbe6daf31..d641405c875 100644
--- a/src/librustdoc/html/static/js/scrape-examples.js
+++ b/src/librustdoc/html/static/js/scrape-examples.js
@@ -42,7 +42,7 @@
     function createScrapeButton(parent, className, content) {
         const button = document.createElement("button");
         button.className = className;
-        button.innerText = content;
+        button.title = content;
         parent.insertBefore(button, parent.firstChild);
         return button;
     }
@@ -54,14 +54,14 @@
         let expandButton = null;
 
         if (!example.classList.contains("expanded")) {
-            expandButton = createScrapeButton(buttonHolder, "expand", "↕");
+            expandButton = createScrapeButton(buttonHolder, "expand", "Show all");
         }
         const isHidden = example.parentElement.classList.contains("more-scraped-examples");
 
         const locs = example.locs;
         if (locs.length > 1) {
-            const next = createScrapeButton(buttonHolder, "next", "≻");
-            const prev = createScrapeButton(buttonHolder, "prev", "≺");
+            const next = createScrapeButton(buttonHolder, "next", "Next usage");
+            const prev = createScrapeButton(buttonHolder, "prev", "Previous usage");
 
             // Toggle through list of examples in a given file
             const onChangeLoc = changeIndex => {
@@ -94,9 +94,13 @@
             expandButton.addEventListener("click", () => {
                 if (hasClass(example, "expanded")) {
                     removeClass(example, "expanded");
+                    removeClass(expandButton, "collapse");
+                    expandButton.title = "Show all";
                     scrollToLoc(example, locs[0][0], isHidden);
                 } else {
                     addClass(example, "expanded");
+                    addClass(expandButton, "collapse");
+                    expandButton.title = "Show single example";
                 }
             });
         }
diff --git a/src/tools/clippy/tests/ui/implicit_return.stderr b/src/tools/clippy/tests/ui/implicit_return.stderr
index 0d2faa5e067..7ea72307450 100644
--- a/src/tools/clippy/tests/ui/implicit_return.stderr
+++ b/src/tools/clippy/tests/ui/implicit_return.stderr
@@ -8,8 +8,7 @@ LL |     true
    = help: to override `-D warnings` add `#[allow(clippy::implicit_return)]`
 help: add `return` as shown
    |
-LL -     true
-LL +     return true
+LL |     return true
    |
 
 error: missing `return` statement
@@ -20,9 +19,8 @@ LL |     if true { true } else { false }
    |
 help: add `return` as shown
    |
-LL -     if true { true } else { false }
-LL +     if true { return true } else { false }
-   |
+LL |     if true { return true } else { false }
+   |               ++++++
 
 error: missing `return` statement
   --> tests/ui/implicit_return.rs:19:29
@@ -32,9 +30,8 @@ LL |     if true { true } else { false }
    |
 help: add `return` as shown
    |
-LL -     if true { true } else { false }
-LL +     if true { true } else { return false }
-   |
+LL |     if true { true } else { return false }
+   |                             ++++++
 
 error: missing `return` statement
   --> tests/ui/implicit_return.rs:25:17
@@ -44,9 +41,8 @@ LL |         true => false,
    |
 help: add `return` as shown
    |
-LL -         true => false,
-LL +         true => return false,
-   |
+LL |         true => return false,
+   |                 ++++++
 
 error: missing `return` statement
   --> tests/ui/implicit_return.rs:26:20
@@ -56,9 +52,8 @@ LL |         false => { true },
    |
 help: add `return` as shown
    |
-LL -         false => { true },
-LL +         false => { return true },
-   |
+LL |         false => { return true },
+   |                    ++++++
 
 error: missing `return` statement
   --> tests/ui/implicit_return.rs:39:9
@@ -104,9 +99,8 @@ LL |     let _ = || { true };
    |
 help: add `return` as shown
    |
-LL -     let _ = || { true };
-LL +     let _ = || { return true };
-   |
+LL |     let _ = || { return true };
+   |                  ++++++
 
 error: missing `return` statement
   --> tests/ui/implicit_return.rs:73:16
@@ -116,9 +110,8 @@ LL |     let _ = || true;
    |
 help: add `return` as shown
    |
-LL -     let _ = || true;
-LL +     let _ = || return true;
-   |
+LL |     let _ = || return true;
+   |                ++++++
 
 error: missing `return` statement
   --> tests/ui/implicit_return.rs:81:5
@@ -128,8 +121,7 @@ LL |     format!("test {}", "test")
    |
 help: add `return` as shown
    |
-LL -     format!("test {}", "test")
-LL +     return format!("test {}", "test")
+LL |     return format!("test {}", "test")
    |
 
 error: missing `return` statement
@@ -140,8 +132,7 @@ LL |     m!(true, false)
    |
 help: add `return` as shown
    |
-LL -     m!(true, false)
-LL +     return m!(true, false)
+LL |     return m!(true, false)
    |
 
 error: missing `return` statement
@@ -191,8 +182,7 @@ LL |     true
    |
 help: add `return` as shown
    |
-LL -     true
-LL +     return true
+LL |     return true
    |
 
 error: aborting due to 16 previous errors
diff --git a/src/tools/clippy/tests/ui/legacy_numeric_constants.stderr b/src/tools/clippy/tests/ui/legacy_numeric_constants.stderr
index 74fe09e0f5c..91dfe79d55b 100644
--- a/src/tools/clippy/tests/ui/legacy_numeric_constants.stderr
+++ b/src/tools/clippy/tests/ui/legacy_numeric_constants.stderr
@@ -68,9 +68,8 @@ LL |     MAX;
    |
 help: use the associated constant instead
    |
-LL -     MAX;
-LL +     u32::MAX;
-   |
+LL |     u32::MAX;
+   |     +++++
 
 error: usage of a legacy numeric method
   --> tests/ui/legacy_numeric_constants.rs:49:10
diff --git a/src/tools/run-make-support/src/external_deps/rustc.rs b/src/tools/run-make-support/src/external_deps/rustc.rs
index 33dc57cbc07..fd4a20278ad 100644
--- a/src/tools/run-make-support/src/external_deps/rustc.rs
+++ b/src/tools/run-make-support/src/external_deps/rustc.rs
@@ -84,7 +84,7 @@ impl Rustc {
         self
     }
 
-    /// Specify default optimization level `-O` (alias for `-C opt-level=2`).
+    /// Specify default optimization level `-O` (alias for `-C opt-level=3`).
     pub fn opt(&mut self) -> &mut Self {
         self.cmd.arg("-O");
         self
diff --git a/tests/codegen/enum/enum-debug-niche-2.rs b/tests/codegen/enum/enum-debug-niche-2.rs
index 58f43fe3ec6..80a4081f15b 100644
--- a/tests/codegen/enum/enum-debug-niche-2.rs
+++ b/tests/codegen/enum/enum-debug-niche-2.rs
@@ -5,8 +5,8 @@
 //@ ignore-msvc
 //
 // CHECK: {{.*}}DICompositeType{{.*}}tag: DW_TAG_variant_part,{{.*}}size: 32,{{.*}}
-// CHECK: {{.*}}DIDerivedType{{.*}}tag: DW_TAG_member,{{.*}}name: "Placeholder",{{.*}}extraData: i128 4294967295{{[,)].*}}
-// CHECK: {{.*}}DIDerivedType{{.*}}tag: DW_TAG_member,{{.*}}name: "Error",{{.*}}extraData: i128 0{{[,)].*}}
+// CHECK: {{.*}}DIDerivedType{{.*}}tag: DW_TAG_member,{{.*}}name: "Placeholder",{{.*}}extraData: i32 -1{{[,)].*}}
+// CHECK: {{.*}}DIDerivedType{{.*}}tag: DW_TAG_member,{{.*}}name: "Error",{{.*}}extraData: i32 0{{[,)].*}}
 #![feature(never_type)]
 
 #[derive(Copy, Clone)]
diff --git a/tests/codegen/intrinsics/transmute-niched.rs b/tests/codegen/intrinsics/transmute-niched.rs
index 88119ccb8b2..5ded0e192fa 100644
--- a/tests/codegen/intrinsics/transmute-niched.rs
+++ b/tests/codegen/intrinsics/transmute-niched.rs
@@ -6,6 +6,7 @@
 
 use std::mem::transmute;
 use std::num::NonZero;
+use std::ptr::NonNull;
 
 #[repr(u8)]
 pub enum SmallEnum {
@@ -192,3 +193,31 @@ pub unsafe fn check_bool_to_ordering(x: bool) -> std::cmp::Ordering {
 
     transmute(x)
 }
+
+// CHECK-LABEL: @check_nonnull_to_ptr(
+#[no_mangle]
+pub unsafe fn check_nonnull_to_ptr(x: NonNull<u8>) -> *const u8 {
+    // CHECK-NOT: icmp
+    // CHECK-NOT: assume
+    // OPT: %0 = icmp ne ptr %x, null
+    // OPT: call void @llvm.assume(i1 %0)
+    // CHECK-NOT: icmp
+    // CHECK-NOT: assume
+    // CHECK: ret ptr %x
+
+    transmute(x)
+}
+
+// CHECK-LABEL: @check_ptr_to_nonnull(
+#[no_mangle]
+pub unsafe fn check_ptr_to_nonnull(x: *const u8) -> NonNull<u8> {
+    // CHECK-NOT: icmp
+    // CHECK-NOT: assume
+    // OPT: %0 = icmp ne ptr %x, null
+    // OPT: call void @llvm.assume(i1 %0)
+    // CHECK-NOT: icmp
+    // CHECK-NOT: assume
+    // CHECK: ret ptr %x
+
+    transmute(x)
+}
diff --git a/tests/codegen/intrinsics/transmute.rs b/tests/codegen/intrinsics/transmute.rs
index 541333a52b0..5b40a6a12c0 100644
--- a/tests/codegen/intrinsics/transmute.rs
+++ b/tests/codegen/intrinsics/transmute.rs
@@ -370,9 +370,11 @@ pub unsafe fn check_issue_110005(x: (usize, bool)) -> Option<Box<[u8]>> {
 #[no_mangle]
 pub unsafe fn check_pair_to_dst_ref<'a>(x: (usize, usize)) -> &'a [u8] {
     // CHECK: %_0.0 = getelementptr i8, ptr null, i64 %x.0
-    // CHECK: %0 = insertvalue { ptr, i64 } poison, ptr %_0.0, 0
-    // CHECK: %1 = insertvalue { ptr, i64 } %0, i64 %x.1, 1
-    // CHECK: ret { ptr, i64 } %1
+    // CHECK: %0 = icmp ne ptr %_0.0, null
+    // CHECK: call void @llvm.assume(i1 %0)
+    // CHECK: %1 = insertvalue { ptr, i64 } poison, ptr %_0.0, 0
+    // CHECK: %2 = insertvalue { ptr, i64 } %1, i64 %x.1, 1
+    // CHECK: ret { ptr, i64 } %2
     transmute(x)
 }
 
diff --git a/tests/codegen/slice-iter-len-eq-zero.rs b/tests/codegen/slice-iter-len-eq-zero.rs
index c85861d47f8..6998d98e498 100644
--- a/tests/codegen/slice-iter-len-eq-zero.rs
+++ b/tests/codegen/slice-iter-len-eq-zero.rs
@@ -1,4 +1,5 @@
 //@ compile-flags: -Copt-level=3
+//@ needs-deterministic-layouts (opposite scalar pair orders breaks it)
 #![crate_type = "lib"]
 
 type Demo = [u8; 3];
@@ -7,7 +8,40 @@ type Demo = [u8; 3];
 #[no_mangle]
 pub fn slice_iter_len_eq_zero(y: std::slice::Iter<'_, Demo>) -> bool {
     // CHECK-NOT: sub
-    // CHECK: %[[RET:.+]] = icmp eq ptr {{%1|%0}}, {{%1|%0}}
+    // CHECK: %[[RET:.+]] = icmp eq ptr {{%y.0, %y.1|%y.1, %y.0}}
+    // CHECK: ret i1 %[[RET]]
+    y.len() == 0
+}
+
+// CHECK-LABEL: @slice_iter_len_eq_zero_ref
+#[no_mangle]
+pub fn slice_iter_len_eq_zero_ref(y: &mut std::slice::Iter<'_, Demo>) -> bool {
+    // CHECK-NOT: sub
+    // CHECK: %[[A:.+]] = load ptr
+    // CHECK-SAME: !nonnull
+    // CHECK: %[[B:.+]] = load ptr
+    // CHECK-SAME: !nonnull
+    // CHECK: %[[RET:.+]] = icmp eq ptr %[[A]], %[[B]]
+    // CHECK: ret i1 %[[RET]]
+    y.len() == 0
+}
+
+struct MyZST;
+
+// CHECK-LABEL: @slice_zst_iter_len_eq_zero
+#[no_mangle]
+pub fn slice_zst_iter_len_eq_zero(y: std::slice::Iter<'_, MyZST>) -> bool {
+    // CHECK: %[[RET:.+]] = icmp eq ptr %y.1, null
+    // CHECK: ret i1 %[[RET]]
+    y.len() == 0
+}
+
+// CHECK-LABEL: @slice_zst_iter_len_eq_zero_ref
+#[no_mangle]
+pub fn slice_zst_iter_len_eq_zero_ref(y: &mut std::slice::Iter<'_, MyZST>) -> bool {
+    // CHECK: %[[LEN:.+]] = load ptr
+    // CHECK-NOT: !nonnull
+    // CHECK: %[[RET:.+]] = icmp eq ptr %[[LEN]], null
     // CHECK: ret i1 %[[RET]]
     y.len() == 0
 }
diff --git a/tests/coverage/assert_not.cov-map b/tests/coverage/assert_not.cov-map
index 35568a98af4..526110ebbb7 100644
--- a/tests/coverage/assert_not.cov-map
+++ b/tests/coverage/assert_not.cov-map
@@ -1,13 +1,13 @@
 Function name: assert_not::main
-Raw bytes (29): 0x[01, 01, 00, 05, 01, 06, 01, 01, 12, 05, 02, 05, 00, 14, 09, 01, 05, 00, 14, 0d, 01, 05, 00, 16, 0d, 01, 01, 00, 02]
+Raw bytes (29): 0x[01, 01, 00, 05, 01, 06, 01, 01, 12, 01, 02, 05, 00, 14, 01, 01, 05, 00, 14, 01, 01, 05, 00, 16, 01, 01, 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 + 6, 1) to (start + 1, 18)
-- Code(Counter(1)) at (prev + 2, 5) to (start + 0, 20)
-- Code(Counter(2)) at (prev + 1, 5) to (start + 0, 20)
-- Code(Counter(3)) at (prev + 1, 5) to (start + 0, 22)
-- Code(Counter(3)) at (prev + 1, 1) to (start + 0, 2)
-Highest counter ID seen: c3
+- Code(Counter(0)) at (prev + 2, 5) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 22)
+- Code(Counter(0)) at (prev + 1, 1) to (start + 0, 2)
+Highest counter ID seen: c0
 
diff --git a/tests/coverage/async2.cov-map b/tests/coverage/async2.cov-map
index 7660f917b65..c2a0645ee9a 100644
--- a/tests/coverage/async2.cov-map
+++ b/tests/coverage/async2.cov-map
@@ -8,16 +8,16 @@ Number of file 0 mappings: 1
 Highest counter ID seen: c0
 
 Function name: async2::async_func::{closure#0}
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 0f, 17, 03, 09, 05, 03, 0a, 02, 06, 00, 02, 05, 00, 06, 01, 01, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 01, 0f, 17, 03, 09, 01, 03, 0a, 02, 06, 00, 02, 05, 00, 06, 01, 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, 23) to (start + 3, 9)
-- Code(Counter(1)) at (prev + 3, 10) to (start + 2, 6)
+- Code(Counter(0)) at (prev + 3, 10) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 5) to (start + 0, 6)
 - Code(Counter(0)) at (prev + 1, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+Highest counter ID seen: c0
 
 Function name: async2::async_func_just_println
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 17, 01, 00, 24]
@@ -47,14 +47,14 @@ Number of file 0 mappings: 1
 Highest counter ID seen: c0
 
 Function name: async2::non_async_func
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 07, 01, 03, 09, 05, 03, 0a, 02, 06, 00, 02, 05, 00, 06, 01, 01, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 01, 07, 01, 03, 09, 01, 03, 0a, 02, 06, 00, 02, 05, 00, 06, 01, 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 + 7, 1) to (start + 3, 9)
-- Code(Counter(1)) at (prev + 3, 10) to (start + 2, 6)
+- Code(Counter(0)) at (prev + 3, 10) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 5) to (start + 0, 6)
 - Code(Counter(0)) at (prev + 1, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+Highest counter ID seen: c0
 
diff --git a/tests/coverage/bad_counter_ids.cov-map b/tests/coverage/bad_counter_ids.cov-map
index ba306278449..baac0073fcb 100644
--- a/tests/coverage/bad_counter_ids.cov-map
+++ b/tests/coverage/bad_counter_ids.cov-map
@@ -20,25 +20,25 @@ Number of file 0 mappings: 3
 Highest counter ID seen: c0
 
 Function name: bad_counter_ids::eq_good
-Raw bytes (14): 0x[01, 01, 00, 02, 01, 10, 01, 02, 1f, 05, 03, 01, 00, 02]
+Raw bytes (14): 0x[01, 01, 00, 02, 01, 10, 01, 02, 1f, 01, 03, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 2
 - Code(Counter(0)) at (prev + 16, 1) to (start + 2, 31)
-- Code(Counter(1)) at (prev + 3, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+- Code(Counter(0)) at (prev + 3, 1) to (start + 0, 2)
+Highest counter ID seen: c0
 
 Function name: bad_counter_ids::eq_good_message
-Raw bytes (19): 0x[01, 01, 00, 03, 01, 15, 01, 02, 0f, 00, 02, 20, 00, 2b, 05, 01, 01, 00, 02]
+Raw bytes (19): 0x[01, 01, 00, 03, 01, 15, 01, 02, 0f, 00, 02, 20, 00, 2b, 01, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 3
 - Code(Counter(0)) at (prev + 21, 1) to (start + 2, 15)
 - Code(Zero) at (prev + 2, 32) to (start + 0, 43)
-- Code(Counter(1)) at (prev + 1, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+- Code(Counter(0)) at (prev + 1, 1) to (start + 0, 2)
+Highest counter ID seen: c0
 
 Function name: bad_counter_ids::ne_bad
 Raw bytes (14): 0x[01, 01, 00, 02, 01, 2e, 01, 02, 1f, 00, 03, 01, 00, 02]
@@ -51,15 +51,15 @@ Number of file 0 mappings: 2
 Highest counter ID seen: c0
 
 Function name: bad_counter_ids::ne_bad_message
-Raw bytes (19): 0x[01, 01, 00, 03, 01, 33, 01, 02, 0f, 05, 02, 20, 00, 2b, 00, 01, 01, 00, 02]
+Raw bytes (19): 0x[01, 01, 00, 03, 01, 33, 01, 02, 0f, 01, 02, 20, 00, 2b, 00, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 0
 Number of file 0 mappings: 3
 - Code(Counter(0)) at (prev + 51, 1) to (start + 2, 15)
-- Code(Counter(1)) at (prev + 2, 32) to (start + 0, 43)
+- Code(Counter(0)) at (prev + 2, 32) to (start + 0, 43)
 - Code(Zero) at (prev + 1, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+Highest counter ID seen: c0
 
 Function name: bad_counter_ids::ne_good
 Raw bytes (14): 0x[01, 01, 00, 02, 01, 1a, 01, 02, 1f, 01, 03, 01, 00, 02]
diff --git a/tests/coverage/conditions.cov-map b/tests/coverage/conditions.cov-map
index 549b8bb0a20..2d12f4bf774 100644
--- a/tests/coverage/conditions.cov-map
+++ b/tests/coverage/conditions.cov-map
@@ -1,192 +1,191 @@
 Function name: conditions::main
-Raw bytes (545): 0x[01, 01, 4d, 09, 0d, 01, 09, 0d, 71, 0d, 27, 71, 75, 27, 79, 71, 75, 0d, 23, 27, 79, 71, 75, 01, 03, 03, 15, 19, 65, 19, 4f, 65, 69, 4f, 6d, 65, 69, 19, 4b, 4f, 6d, 65, 69, 03, ef, 01, 15, 19, 15, 19, 1d, 25, 29, 59, 29, 7f, 59, 5d, 7f, 61, 59, 5d, 29, 7b, 7f, 61, 59, 5d, 1d, 87, 01, 25, 29, e7, 01, 1d, eb, 01, 29, ef, 01, 25, 15, 19, 31, 35, e7, 01, 1d, eb, 01, 29, ef, 01, 25, 15, 19, e7, 01, f7, 01, eb, 01, 29, ef, 01, 25, 15, 19, 1d, 31, 35, 4d, 35, df, 01, 4d, 51, df, 01, 55, 4d, 51, 35, db, 01, df, 01, 55, 4d, 51, e7, 01, f3, 01, eb, 01, 29, ef, 01, 25, 15, 19, f7, 01, 35, 1d, 31, 39, 3d, 31, 35, af, 02, 39, 31, 35, 3d, 41, 3d, a7, 02, 41, 45, a7, 02, 49, 41, 45, 3d, a3, 02, a7, 02, 49, 41, 45, af, 02, b3, 02, 31, 35, 39, 3d, 44, 01, 03, 01, 02, 0c, 05, 02, 0d, 02, 06, 00, 02, 05, 00, 06, 03, 03, 09, 00, 0a, 01, 00, 10, 00, 1d, 09, 01, 09, 01, 0a, 06, 02, 0f, 00, 1c, 0d, 01, 0c, 00, 19, 0a, 00, 1d, 00, 2a, 0e, 00, 2e, 00, 3c, 23, 00, 3d, 02, 0a, 1e, 02, 09, 00, 0a, 0d, 01, 09, 01, 12, 2a, 03, 09, 00, 0f, 03, 03, 09, 01, 0c, 11, 01, 0d, 02, 06, 00, 02, 05, 00, 06, 03, 02, 08, 00, 15, 15, 00, 16, 02, 06, 2e, 02, 0f, 00, 1c, 19, 01, 0c, 00, 19, 32, 00, 1d, 00, 2a, 36, 00, 2e, 00, 3c, 4b, 00, 3d, 02, 0a, 46, 02, 09, 00, 0a, 19, 01, 09, 00, 17, 52, 02, 09, 00, 0f, ef, 01, 03, 08, 00, 0c, 1d, 01, 0d, 01, 10, 21, 01, 11, 02, 0a, 00, 02, 09, 00, 0a, 1d, 02, 0c, 00, 19, 25, 00, 1a, 02, 0a, 5e, 04, 11, 00, 1e, 29, 01, 10, 00, 1d, 62, 00, 21, 00, 2e, 66, 00, 32, 00, 40, 7b, 00, 41, 02, 0e, 76, 02, 0d, 00, 0e, 29, 01, 0d, 00, 1b, 82, 01, 02, 0d, 00, 13, 00, 02, 05, 00, 06, 9e, 01, 02, 09, 01, 0c, 2d, 01, 0d, 02, 06, 00, 02, 05, 00, 06, af, 02, 02, 09, 00, 0a, 9e, 01, 00, 10, 00, 1d, 31, 00, 1e, 02, 06, ae, 01, 02, 0f, 00, 1c, 35, 01, 0c, 00, 19, c2, 01, 00, 1d, 00, 2a, c6, 01, 00, 2e, 00, 3c, db, 01, 00, 3d, 02, 0a, d6, 01, 02, 09, 00, 0a, 35, 01, 09, 00, 17, e2, 01, 02, 0d, 02, 0f, b3, 02, 05, 09, 00, 0a, af, 02, 00, 10, 00, 1d, 39, 00, 1e, 02, 06, 82, 02, 02, 0f, 00, 1c, 3d, 01, 0c, 00, 19, 8a, 02, 00, 1d, 00, 2a, 8e, 02, 00, 2e, 00, 3c, a3, 02, 00, 3d, 02, 0a, 9e, 02, 02, 09, 00, 0a, 3d, 01, 09, 00, 17, aa, 02, 02, 09, 00, 0f, 01, 02, 01, 00, 02]
+Raw bytes (533): 0x[01, 01, 47, 05, 09, 01, 05, 09, 5d, 09, 27, 5d, 61, 27, 65, 5d, 61, 09, 23, 27, 65, 5d, 61, 01, 03, 03, 0d, 11, 51, 11, 4f, 51, 55, 4f, 59, 51, 55, 11, 4b, 4f, 59, 51, 55, 03, 97, 01, 0d, 11, 0d, 11, 0d, 11, 0d, 11, 0d, 11, 97, 01, 15, 0d, 11, 19, 45, 19, 8f, 01, 45, 49, 8f, 01, 4d, 45, 49, 19, 8b, 01, 8f, 01, 4d, 45, 49, 97, 01, db, 01, 0d, 11, 15, 19, 15, 19, 15, 19, 1d, 21, 15, 19, db, 01, 1d, 15, 19, 21, 39, 21, d3, 01, 39, 3d, d3, 01, 41, 39, 3d, 21, cf, 01, d3, 01, 41, 39, 3d, db, 01, 97, 02, 15, 19, 1d, 21, 25, 29, 1d, 21, 97, 02, 25, 1d, 21, 29, 2d, 29, 8f, 02, 2d, 31, 8f, 02, 35, 2d, 31, 29, 8b, 02, 8f, 02, 35, 2d, 31, 97, 02, 9b, 02, 1d, 21, 25, 29, 44, 01, 03, 01, 02, 0c, 01, 02, 0d, 02, 06, 00, 02, 05, 00, 06, 03, 03, 09, 00, 0a, 01, 00, 10, 00, 1d, 05, 01, 09, 01, 0a, 06, 02, 0f, 00, 1c, 09, 01, 0c, 00, 19, 0a, 00, 1d, 00, 2a, 0e, 00, 2e, 00, 3c, 23, 00, 3d, 02, 0a, 1e, 02, 09, 00, 0a, 09, 01, 09, 01, 12, 2a, 03, 09, 00, 0f, 03, 03, 09, 01, 0c, 03, 01, 0d, 02, 06, 00, 02, 05, 00, 06, 03, 02, 08, 00, 15, 0d, 00, 16, 02, 06, 2e, 02, 0f, 00, 1c, 11, 01, 0c, 00, 19, 32, 00, 1d, 00, 2a, 36, 00, 2e, 00, 3c, 4b, 00, 3d, 02, 0a, 46, 02, 09, 00, 0a, 11, 01, 09, 00, 17, 52, 02, 09, 00, 0f, 97, 01, 03, 08, 00, 0c, 97, 01, 01, 0d, 01, 10, 97, 01, 01, 11, 02, 0a, 00, 02, 09, 00, 0a, 97, 01, 02, 0c, 00, 19, 15, 00, 1a, 02, 0a, 6a, 04, 11, 00, 1e, 19, 01, 10, 00, 1d, 72, 00, 21, 00, 2e, 76, 00, 32, 00, 40, 8b, 01, 00, 41, 02, 0e, 86, 01, 02, 0d, 00, 0e, 19, 01, 0d, 00, 1b, 92, 01, 02, 0d, 00, 13, 00, 02, 05, 00, 06, db, 01, 02, 09, 01, 0c, db, 01, 01, 0d, 02, 06, 00, 02, 05, 00, 06, 97, 02, 02, 09, 00, 0a, db, 01, 00, 10, 00, 1d, 1d, 00, 1e, 02, 06, ae, 01, 02, 0f, 00, 1c, 21, 01, 0c, 00, 19, b6, 01, 00, 1d, 00, 2a, ba, 01, 00, 2e, 00, 3c, cf, 01, 00, 3d, 02, 0a, ca, 01, 02, 09, 00, 0a, 21, 01, 09, 00, 17, d6, 01, 02, 0d, 02, 0f, 9b, 02, 05, 09, 00, 0a, 97, 02, 00, 10, 00, 1d, 25, 00, 1e, 02, 06, ea, 01, 02, 0f, 00, 1c, 29, 01, 0c, 00, 19, f2, 01, 00, 1d, 00, 2a, f6, 01, 00, 2e, 00, 3c, 8b, 02, 00, 3d, 02, 0a, 86, 02, 02, 09, 00, 0a, 29, 01, 09, 00, 17, 92, 02, 02, 09, 00, 0f, 01, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 77
-- expression 0 operands: lhs = Counter(2), rhs = Counter(3)
-- expression 1 operands: lhs = Counter(0), rhs = Counter(2)
-- expression 2 operands: lhs = Counter(3), rhs = Counter(28)
-- expression 3 operands: lhs = Counter(3), rhs = Expression(9, Add)
-- expression 4 operands: lhs = Counter(28), rhs = Counter(29)
-- expression 5 operands: lhs = Expression(9, Add), rhs = Counter(30)
-- expression 6 operands: lhs = Counter(28), rhs = Counter(29)
-- expression 7 operands: lhs = Counter(3), rhs = Expression(8, Add)
-- expression 8 operands: lhs = Expression(9, Add), rhs = Counter(30)
-- expression 9 operands: lhs = Counter(28), rhs = Counter(29)
+Number of expressions: 71
+- expression 0 operands: lhs = Counter(1), rhs = Counter(2)
+- expression 1 operands: lhs = Counter(0), rhs = Counter(1)
+- expression 2 operands: lhs = Counter(2), rhs = Counter(23)
+- expression 3 operands: lhs = Counter(2), rhs = Expression(9, Add)
+- expression 4 operands: lhs = Counter(23), rhs = Counter(24)
+- expression 5 operands: lhs = Expression(9, Add), rhs = Counter(25)
+- expression 6 operands: lhs = Counter(23), rhs = Counter(24)
+- expression 7 operands: lhs = Counter(2), rhs = Expression(8, Add)
+- expression 8 operands: lhs = Expression(9, Add), rhs = Counter(25)
+- expression 9 operands: lhs = Counter(23), rhs = Counter(24)
 - expression 10 operands: lhs = Counter(0), rhs = Expression(0, Add)
-- expression 11 operands: lhs = Expression(0, Add), rhs = Counter(5)
-- expression 12 operands: lhs = Counter(6), rhs = Counter(25)
-- expression 13 operands: lhs = Counter(6), rhs = Expression(19, Add)
-- expression 14 operands: lhs = Counter(25), rhs = Counter(26)
-- expression 15 operands: lhs = Expression(19, Add), rhs = Counter(27)
-- expression 16 operands: lhs = Counter(25), rhs = Counter(26)
-- expression 17 operands: lhs = Counter(6), rhs = Expression(18, Add)
-- expression 18 operands: lhs = Expression(19, Add), rhs = Counter(27)
-- expression 19 operands: lhs = Counter(25), rhs = Counter(26)
-- expression 20 operands: lhs = Expression(0, Add), rhs = Expression(59, Add)
-- expression 21 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 22 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 23 operands: lhs = Counter(7), rhs = Counter(9)
-- expression 24 operands: lhs = Counter(10), rhs = Counter(22)
-- expression 25 operands: lhs = Counter(10), rhs = Expression(31, Add)
-- expression 26 operands: lhs = Counter(22), rhs = Counter(23)
-- expression 27 operands: lhs = Expression(31, Add), rhs = Counter(24)
-- expression 28 operands: lhs = Counter(22), rhs = Counter(23)
-- expression 29 operands: lhs = Counter(10), rhs = Expression(30, Add)
-- expression 30 operands: lhs = Expression(31, Add), rhs = Counter(24)
-- expression 31 operands: lhs = Counter(22), rhs = Counter(23)
-- expression 32 operands: lhs = Counter(7), rhs = Expression(33, Add)
-- expression 33 operands: lhs = Counter(9), rhs = Counter(10)
-- expression 34 operands: lhs = Expression(57, Add), rhs = Counter(7)
-- expression 35 operands: lhs = Expression(58, Add), rhs = Counter(10)
-- expression 36 operands: lhs = Expression(59, Add), rhs = Counter(9)
-- expression 37 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 38 operands: lhs = Counter(12), rhs = Counter(13)
-- expression 39 operands: lhs = Expression(57, Add), rhs = Counter(7)
-- expression 40 operands: lhs = Expression(58, Add), rhs = Counter(10)
-- expression 41 operands: lhs = Expression(59, Add), rhs = Counter(9)
+- expression 11 operands: lhs = Expression(0, Add), rhs = Counter(3)
+- expression 12 operands: lhs = Counter(4), rhs = Counter(20)
+- expression 13 operands: lhs = Counter(4), rhs = Expression(19, Add)
+- expression 14 operands: lhs = Counter(20), rhs = Counter(21)
+- expression 15 operands: lhs = Expression(19, Add), rhs = Counter(22)
+- expression 16 operands: lhs = Counter(20), rhs = Counter(21)
+- expression 17 operands: lhs = Counter(4), rhs = Expression(18, Add)
+- expression 18 operands: lhs = Expression(19, Add), rhs = Counter(22)
+- expression 19 operands: lhs = Counter(20), rhs = Counter(21)
+- expression 20 operands: lhs = Expression(0, Add), rhs = Expression(37, Add)
+- expression 21 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 22 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 23 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 24 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 25 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 26 operands: lhs = Expression(37, Add), rhs = Counter(5)
+- expression 27 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 28 operands: lhs = Counter(6), rhs = Counter(17)
+- expression 29 operands: lhs = Counter(6), rhs = Expression(35, Add)
+- expression 30 operands: lhs = Counter(17), rhs = Counter(18)
+- expression 31 operands: lhs = Expression(35, Add), rhs = Counter(19)
+- expression 32 operands: lhs = Counter(17), rhs = Counter(18)
+- expression 33 operands: lhs = Counter(6), rhs = Expression(34, Add)
+- expression 34 operands: lhs = Expression(35, Add), rhs = Counter(19)
+- expression 35 operands: lhs = Counter(17), rhs = Counter(18)
+- expression 36 operands: lhs = Expression(37, Add), rhs = Expression(54, Add)
+- expression 37 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 38 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 39 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 40 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 41 operands: lhs = Counter(7), rhs = Counter(8)
 - expression 42 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 43 operands: lhs = Expression(57, Add), rhs = Expression(61, Add)
-- expression 44 operands: lhs = Expression(58, Add), rhs = Counter(10)
-- expression 45 operands: lhs = Expression(59, Add), rhs = Counter(9)
-- expression 46 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 47 operands: lhs = Counter(7), rhs = Counter(12)
-- expression 48 operands: lhs = Counter(13), rhs = Counter(19)
-- expression 49 operands: lhs = Counter(13), rhs = Expression(55, Add)
-- expression 50 operands: lhs = Counter(19), rhs = Counter(20)
-- expression 51 operands: lhs = Expression(55, Add), rhs = Counter(21)
-- expression 52 operands: lhs = Counter(19), rhs = Counter(20)
-- expression 53 operands: lhs = Counter(13), rhs = Expression(54, Add)
-- expression 54 operands: lhs = Expression(55, Add), rhs = Counter(21)
-- expression 55 operands: lhs = Counter(19), rhs = Counter(20)
-- expression 56 operands: lhs = Expression(57, Add), rhs = Expression(60, Add)
-- expression 57 operands: lhs = Expression(58, Add), rhs = Counter(10)
-- expression 58 operands: lhs = Expression(59, Add), rhs = Counter(9)
-- expression 59 operands: lhs = Counter(5), rhs = Counter(6)
-- expression 60 operands: lhs = Expression(61, Add), rhs = Counter(13)
-- expression 61 operands: lhs = Counter(7), rhs = Counter(12)
-- expression 62 operands: lhs = Counter(14), rhs = Counter(15)
-- expression 63 operands: lhs = Counter(12), rhs = Counter(13)
-- expression 64 operands: lhs = Expression(75, Add), rhs = Counter(14)
-- expression 65 operands: lhs = Counter(12), rhs = Counter(13)
-- expression 66 operands: lhs = Counter(15), rhs = Counter(16)
-- expression 67 operands: lhs = Counter(15), rhs = Expression(73, Add)
-- expression 68 operands: lhs = Counter(16), rhs = Counter(17)
-- expression 69 operands: lhs = Expression(73, Add), rhs = Counter(18)
-- expression 70 operands: lhs = Counter(16), rhs = Counter(17)
-- expression 71 operands: lhs = Counter(15), rhs = Expression(72, Add)
-- expression 72 operands: lhs = Expression(73, Add), rhs = Counter(18)
-- expression 73 operands: lhs = Counter(16), rhs = Counter(17)
-- expression 74 operands: lhs = Expression(75, Add), rhs = Expression(76, Add)
-- expression 75 operands: lhs = Counter(12), rhs = Counter(13)
-- expression 76 operands: lhs = Counter(14), rhs = Counter(15)
+- expression 43 operands: lhs = Expression(54, Add), rhs = Counter(7)
+- expression 44 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 45 operands: lhs = Counter(8), rhs = Counter(14)
+- expression 46 operands: lhs = Counter(8), rhs = Expression(52, Add)
+- expression 47 operands: lhs = Counter(14), rhs = Counter(15)
+- expression 48 operands: lhs = Expression(52, Add), rhs = Counter(16)
+- expression 49 operands: lhs = Counter(14), rhs = Counter(15)
+- expression 50 operands: lhs = Counter(8), rhs = Expression(51, Add)
+- expression 51 operands: lhs = Expression(52, Add), rhs = Counter(16)
+- expression 52 operands: lhs = Counter(14), rhs = Counter(15)
+- expression 53 operands: lhs = Expression(54, Add), rhs = Expression(69, Add)
+- expression 54 operands: lhs = Counter(5), rhs = Counter(6)
+- expression 55 operands: lhs = Counter(7), rhs = Counter(8)
+- expression 56 operands: lhs = Counter(9), rhs = Counter(10)
+- expression 57 operands: lhs = Counter(7), rhs = Counter(8)
+- expression 58 operands: lhs = Expression(69, Add), rhs = Counter(9)
+- expression 59 operands: lhs = Counter(7), rhs = Counter(8)
+- expression 60 operands: lhs = Counter(10), rhs = Counter(11)
+- expression 61 operands: lhs = Counter(10), rhs = Expression(67, Add)
+- expression 62 operands: lhs = Counter(11), rhs = Counter(12)
+- expression 63 operands: lhs = Expression(67, Add), rhs = Counter(13)
+- expression 64 operands: lhs = Counter(11), rhs = Counter(12)
+- expression 65 operands: lhs = Counter(10), rhs = Expression(66, Add)
+- expression 66 operands: lhs = Expression(67, Add), rhs = Counter(13)
+- expression 67 operands: lhs = Counter(11), rhs = Counter(12)
+- expression 68 operands: lhs = Expression(69, Add), rhs = Expression(70, Add)
+- expression 69 operands: lhs = Counter(7), rhs = Counter(8)
+- expression 70 operands: lhs = Counter(9), rhs = Counter(10)
 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(Counter(0)) at (prev + 2, 13) to (start + 2, 6)
 - Code(Zero) at (prev + 2, 5) to (start + 0, 6)
 - Code(Expression(0, Add)) at (prev + 3, 9) to (start + 0, 10)
-    = (c2 + c3)
+    = (c1 + c2)
 - Code(Counter(0)) at (prev + 0, 16) to (start + 0, 29)
-- Code(Counter(2)) at (prev + 1, 9) to (start + 1, 10)
+- Code(Counter(1)) at (prev + 1, 9) to (start + 1, 10)
 - Code(Expression(1, Sub)) at (prev + 2, 15) to (start + 0, 28)
-    = (c0 - c2)
-- Code(Counter(3)) at (prev + 1, 12) to (start + 0, 25)
+    = (c0 - c1)
+- Code(Counter(2)) at (prev + 1, 12) to (start + 0, 25)
 - Code(Expression(2, Sub)) at (prev + 0, 29) to (start + 0, 42)
-    = (c3 - c28)
+    = (c2 - c23)
 - Code(Expression(3, Sub)) at (prev + 0, 46) to (start + 0, 60)
-    = (c3 - (c28 + c29))
+    = (c2 - (c23 + c24))
 - Code(Expression(8, Add)) at (prev + 0, 61) to (start + 2, 10)
-    = ((c28 + c29) + c30)
+    = ((c23 + c24) + c25)
 - Code(Expression(7, Sub)) at (prev + 2, 9) to (start + 0, 10)
-    = (c3 - ((c28 + c29) + c30))
-- Code(Counter(3)) at (prev + 1, 9) to (start + 1, 18)
+    = (c2 - ((c23 + c24) + c25))
+- Code(Counter(2)) at (prev + 1, 9) to (start + 1, 18)
 - Code(Expression(10, Sub)) at (prev + 3, 9) to (start + 0, 15)
-    = (c0 - (c2 + c3))
+    = (c0 - (c1 + c2))
 - Code(Expression(0, Add)) at (prev + 3, 9) to (start + 1, 12)
-    = (c2 + c3)
-- Code(Counter(4)) at (prev + 1, 13) to (start + 2, 6)
+    = (c1 + c2)
+- Code(Expression(0, Add)) at (prev + 1, 13) to (start + 2, 6)
+    = (c1 + c2)
 - Code(Zero) at (prev + 2, 5) to (start + 0, 6)
 - Code(Expression(0, Add)) at (prev + 2, 8) to (start + 0, 21)
-    = (c2 + c3)
-- Code(Counter(5)) at (prev + 0, 22) to (start + 2, 6)
+    = (c1 + c2)
+- Code(Counter(3)) at (prev + 0, 22) to (start + 2, 6)
 - Code(Expression(11, Sub)) at (prev + 2, 15) to (start + 0, 28)
-    = ((c2 + c3) - c5)
-- Code(Counter(6)) at (prev + 1, 12) to (start + 0, 25)
+    = ((c1 + c2) - c3)
+- Code(Counter(4)) at (prev + 1, 12) to (start + 0, 25)
 - Code(Expression(12, Sub)) at (prev + 0, 29) to (start + 0, 42)
-    = (c6 - c25)
+    = (c4 - c20)
 - Code(Expression(13, Sub)) at (prev + 0, 46) to (start + 0, 60)
-    = (c6 - (c25 + c26))
+    = (c4 - (c20 + c21))
 - Code(Expression(18, Add)) at (prev + 0, 61) to (start + 2, 10)
-    = ((c25 + c26) + c27)
+    = ((c20 + c21) + c22)
 - Code(Expression(17, Sub)) at (prev + 2, 9) to (start + 0, 10)
-    = (c6 - ((c25 + c26) + c27))
-- Code(Counter(6)) at (prev + 1, 9) to (start + 0, 23)
+    = (c4 - ((c20 + c21) + c22))
+- Code(Counter(4)) at (prev + 1, 9) to (start + 0, 23)
 - Code(Expression(20, Sub)) at (prev + 2, 9) to (start + 0, 15)
-    = ((c2 + c3) - (c5 + c6))
-- Code(Expression(59, Add)) at (prev + 3, 8) to (start + 0, 12)
-    = (c5 + c6)
-- Code(Counter(7)) at (prev + 1, 13) to (start + 1, 16)
-- Code(Counter(8)) at (prev + 1, 17) to (start + 2, 10)
+    = ((c1 + c2) - (c3 + c4))
+- Code(Expression(37, Add)) at (prev + 3, 8) to (start + 0, 12)
+    = (c3 + c4)
+- Code(Expression(37, Add)) at (prev + 1, 13) to (start + 1, 16)
+    = (c3 + c4)
+- Code(Expression(37, Add)) at (prev + 1, 17) to (start + 2, 10)
+    = (c3 + c4)
 - Code(Zero) at (prev + 2, 9) to (start + 0, 10)
-- Code(Counter(7)) at (prev + 2, 12) to (start + 0, 25)
-- Code(Counter(9)) at (prev + 0, 26) to (start + 2, 10)
-- Code(Expression(23, Sub)) at (prev + 4, 17) to (start + 0, 30)
-    = (c7 - c9)
-- Code(Counter(10)) at (prev + 1, 16) to (start + 0, 29)
-- Code(Expression(24, Sub)) at (prev + 0, 33) to (start + 0, 46)
-    = (c10 - c22)
-- Code(Expression(25, Sub)) at (prev + 0, 50) to (start + 0, 64)
-    = (c10 - (c22 + c23))
-- Code(Expression(30, Add)) at (prev + 0, 65) to (start + 2, 14)
-    = ((c22 + c23) + c24)
-- Code(Expression(29, Sub)) at (prev + 2, 13) to (start + 0, 14)
-    = (c10 - ((c22 + c23) + c24))
-- Code(Counter(10)) at (prev + 1, 13) to (start + 0, 27)
-- Code(Expression(32, Sub)) at (prev + 2, 13) to (start + 0, 19)
-    = (c7 - (c9 + c10))
+- Code(Expression(37, Add)) at (prev + 2, 12) to (start + 0, 25)
+    = (c3 + c4)
+- Code(Counter(5)) at (prev + 0, 26) to (start + 2, 10)
+- Code(Expression(26, Sub)) at (prev + 4, 17) to (start + 0, 30)
+    = ((c3 + c4) - c5)
+- Code(Counter(6)) at (prev + 1, 16) to (start + 0, 29)
+- Code(Expression(28, Sub)) at (prev + 0, 33) to (start + 0, 46)
+    = (c6 - c17)
+- Code(Expression(29, Sub)) at (prev + 0, 50) to (start + 0, 64)
+    = (c6 - (c17 + c18))
+- Code(Expression(34, Add)) at (prev + 0, 65) to (start + 2, 14)
+    = ((c17 + c18) + c19)
+- Code(Expression(33, Sub)) at (prev + 2, 13) to (start + 0, 14)
+    = (c6 - ((c17 + c18) + c19))
+- Code(Counter(6)) at (prev + 1, 13) to (start + 0, 27)
+- Code(Expression(36, Sub)) at (prev + 2, 13) to (start + 0, 19)
+    = ((c3 + c4) - (c5 + c6))
 - Code(Zero) at (prev + 2, 5) to (start + 0, 6)
-- Code(Expression(39, Sub)) at (prev + 2, 9) to (start + 1, 12)
-    = ((((c5 + c6) + c9) + c10) - c7)
-- Code(Counter(11)) at (prev + 1, 13) to (start + 2, 6)
+- Code(Expression(54, Add)) at (prev + 2, 9) to (start + 1, 12)
+    = (c5 + c6)
+- Code(Expression(54, Add)) at (prev + 1, 13) to (start + 2, 6)
+    = (c5 + c6)
 - Code(Zero) at (prev + 2, 5) to (start + 0, 6)
-- Code(Expression(75, Add)) at (prev + 2, 9) to (start + 0, 10)
-    = (c12 + c13)
-- Code(Expression(39, Sub)) at (prev + 0, 16) to (start + 0, 29)
-    = ((((c5 + c6) + c9) + c10) - c7)
-- Code(Counter(12)) at (prev + 0, 30) to (start + 2, 6)
+- Code(Expression(69, Add)) at (prev + 2, 9) to (start + 0, 10)
+    = (c7 + c8)
+- Code(Expression(54, Add)) at (prev + 0, 16) to (start + 0, 29)
+    = (c5 + c6)
+- Code(Counter(7)) at (prev + 0, 30) to (start + 2, 6)
 - Code(Expression(43, Sub)) at (prev + 2, 15) to (start + 0, 28)
-    = ((((c5 + c6) + c9) + c10) - (c7 + c12))
-- Code(Counter(13)) at (prev + 1, 12) to (start + 0, 25)
-- Code(Expression(48, Sub)) at (prev + 0, 29) to (start + 0, 42)
-    = (c13 - c19)
-- Code(Expression(49, Sub)) at (prev + 0, 46) to (start + 0, 60)
-    = (c13 - (c19 + c20))
-- Code(Expression(54, Add)) at (prev + 0, 61) to (start + 2, 10)
-    = ((c19 + c20) + c21)
-- Code(Expression(53, Sub)) at (prev + 2, 9) to (start + 0, 10)
-    = (c13 - ((c19 + c20) + c21))
-- Code(Counter(13)) at (prev + 1, 9) to (start + 0, 23)
-- Code(Expression(56, Sub)) at (prev + 2, 13) to (start + 2, 15)
-    = ((((c5 + c6) + c9) + c10) - ((c7 + c12) + c13))
-- Code(Expression(76, Add)) at (prev + 5, 9) to (start + 0, 10)
-    = (c14 + c15)
-- Code(Expression(75, Add)) at (prev + 0, 16) to (start + 0, 29)
-    = (c12 + c13)
-- Code(Counter(14)) at (prev + 0, 30) to (start + 2, 6)
-- Code(Expression(64, Sub)) at (prev + 2, 15) to (start + 0, 28)
-    = ((c12 + c13) - c14)
-- Code(Counter(15)) at (prev + 1, 12) to (start + 0, 25)
-- Code(Expression(66, Sub)) at (prev + 0, 29) to (start + 0, 42)
-    = (c15 - c16)
-- Code(Expression(67, Sub)) at (prev + 0, 46) to (start + 0, 60)
-    = (c15 - (c16 + c17))
-- Code(Expression(72, Add)) at (prev + 0, 61) to (start + 2, 10)
-    = ((c16 + c17) + c18)
-- Code(Expression(71, Sub)) at (prev + 2, 9) to (start + 0, 10)
-    = (c15 - ((c16 + c17) + c18))
-- Code(Counter(15)) at (prev + 1, 9) to (start + 0, 23)
-- Code(Expression(74, Sub)) at (prev + 2, 9) to (start + 0, 15)
-    = ((c12 + c13) - (c14 + c15))
+    = ((c5 + c6) - c7)
+- Code(Counter(8)) at (prev + 1, 12) to (start + 0, 25)
+- Code(Expression(45, Sub)) at (prev + 0, 29) to (start + 0, 42)
+    = (c8 - c14)
+- Code(Expression(46, Sub)) at (prev + 0, 46) to (start + 0, 60)
+    = (c8 - (c14 + c15))
+- Code(Expression(51, Add)) at (prev + 0, 61) to (start + 2, 10)
+    = ((c14 + c15) + c16)
+- Code(Expression(50, Sub)) at (prev + 2, 9) to (start + 0, 10)
+    = (c8 - ((c14 + c15) + c16))
+- Code(Counter(8)) at (prev + 1, 9) to (start + 0, 23)
+- Code(Expression(53, Sub)) at (prev + 2, 13) to (start + 2, 15)
+    = ((c5 + c6) - (c7 + c8))
+- Code(Expression(70, Add)) at (prev + 5, 9) to (start + 0, 10)
+    = (c9 + c10)
+- Code(Expression(69, Add)) at (prev + 0, 16) to (start + 0, 29)
+    = (c7 + c8)
+- Code(Counter(9)) at (prev + 0, 30) to (start + 2, 6)
+- Code(Expression(58, Sub)) at (prev + 2, 15) to (start + 0, 28)
+    = ((c7 + c8) - c9)
+- Code(Counter(10)) at (prev + 1, 12) to (start + 0, 25)
+- Code(Expression(60, Sub)) at (prev + 0, 29) to (start + 0, 42)
+    = (c10 - c11)
+- Code(Expression(61, Sub)) at (prev + 0, 46) to (start + 0, 60)
+    = (c10 - (c11 + c12))
+- Code(Expression(66, Add)) at (prev + 0, 61) to (start + 2, 10)
+    = ((c11 + c12) + c13)
+- Code(Expression(65, Sub)) at (prev + 2, 9) to (start + 0, 10)
+    = (c10 - ((c11 + c12) + c13))
+- Code(Counter(10)) at (prev + 1, 9) to (start + 0, 23)
+- Code(Expression(68, Sub)) at (prev + 2, 9) to (start + 0, 15)
+    = ((c7 + c8) - (c9 + c10))
 - Code(Counter(0)) at (prev + 2, 1) to (start + 0, 2)
-Highest counter ID seen: c15
+Highest counter ID seen: c10
 
diff --git a/tests/coverage/drop_trait.cov-map b/tests/coverage/drop_trait.cov-map
index a97c0f8794c..16facf2eddf 100644
--- a/tests/coverage/drop_trait.cov-map
+++ b/tests/coverage/drop_trait.cov-map
@@ -8,14 +8,14 @@ Number of file 0 mappings: 1
 Highest counter ID seen: c0
 
 Function name: drop_trait::main
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 0e, 01, 05, 0c, 05, 06, 09, 01, 16, 00, 02, 06, 04, 0b, 01, 05, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 01, 0e, 01, 05, 0c, 01, 06, 09, 01, 16, 00, 02, 06, 04, 0b, 01, 05, 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 + 14, 1) to (start + 5, 12)
-- Code(Counter(1)) at (prev + 6, 9) to (start + 1, 22)
+- Code(Counter(0)) at (prev + 6, 9) to (start + 1, 22)
 - Code(Zero) at (prev + 2, 6) to (start + 4, 11)
 - Code(Counter(0)) at (prev + 5, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+Highest counter ID seen: c0
 
diff --git a/tests/coverage/generics.cov-map b/tests/coverage/generics.cov-map
index d082bd54493..bc5661afdc1 100644
--- a/tests/coverage/generics.cov-map
+++ b/tests/coverage/generics.cov-map
@@ -35,14 +35,14 @@ Number of file 0 mappings: 1
 Highest counter ID seen: c0
 
 Function name: generics::main
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 16, 01, 08, 0c, 05, 09, 09, 01, 16, 00, 02, 06, 04, 0b, 01, 05, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 01, 16, 01, 08, 0c, 01, 09, 09, 01, 16, 00, 02, 06, 04, 0b, 01, 05, 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 + 22, 1) to (start + 8, 12)
-- Code(Counter(1)) at (prev + 9, 9) to (start + 1, 22)
+- Code(Counter(0)) at (prev + 9, 9) to (start + 1, 22)
 - Code(Zero) at (prev + 2, 6) to (start + 4, 11)
 - Code(Counter(0)) at (prev + 5, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+Highest counter ID seen: c0
 
diff --git a/tests/coverage/loops_branches.cov-map b/tests/coverage/loops_branches.cov-map
index 640d5f15be0..2cb0f948b3e 100644
--- a/tests/coverage/loops_branches.cov-map
+++ b/tests/coverage/loops_branches.cov-map
@@ -1,36 +1,36 @@
 Function name: <loops_branches::DebugTest as core::fmt::Debug>::fmt
-Raw bytes (112): 0x[01, 01, 04, 07, 0b, 01, 11, 09, 0d, 0d, 11, 14, 01, 09, 05, 01, 10, 05, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 05, 01, 0d, 00, 0e, 05, 01, 0d, 00, 1e, 09, 00, 1e, 00, 1f, 00, 01, 10, 01, 0a, 11, 03, 0d, 00, 0e, 0d, 00, 12, 00, 17, 11, 01, 10, 00, 14, 15, 01, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, 15, 01, 11, 00, 12, 15, 01, 11, 00, 22, 02, 00, 22, 00, 23, 00, 01, 14, 01, 0e, 0e, 03, 09, 00, 0f, 01, 01, 05, 00, 06]
+Raw bytes (112): 0x[01, 01, 04, 07, 0b, 01, 0d, 05, 09, 09, 0d, 14, 01, 09, 05, 01, 10, 01, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 01, 01, 0d, 00, 0e, 01, 01, 0d, 00, 1e, 05, 00, 1e, 00, 1f, 00, 01, 10, 01, 0a, 0d, 03, 0d, 00, 0e, 09, 00, 12, 00, 17, 0d, 01, 10, 00, 14, 0d, 01, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, 0d, 01, 11, 00, 12, 0d, 01, 11, 00, 22, 02, 00, 22, 00, 23, 00, 01, 14, 01, 0e, 0e, 03, 09, 00, 0f, 01, 01, 05, 00, 06]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 4
 - expression 0 operands: lhs = Expression(1, Add), rhs = Expression(2, Add)
-- expression 1 operands: lhs = Counter(0), rhs = Counter(4)
-- expression 2 operands: lhs = Counter(2), rhs = Counter(3)
-- expression 3 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 1 operands: lhs = Counter(0), rhs = Counter(3)
+- expression 2 operands: lhs = Counter(1), rhs = Counter(2)
+- expression 3 operands: lhs = Counter(2), rhs = Counter(3)
 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)
+- Code(Counter(0)) at (prev + 2, 16) to (start + 0, 21)
 - Code(Zero) at (prev + 1, 23) to (start + 0, 27)
 - Code(Zero) at (prev + 0, 28) to (start + 0, 30)
-- Code(Counter(1)) at (prev + 1, 13) to (start + 0, 14)
-- Code(Counter(1)) at (prev + 1, 13) to (start + 0, 30)
-- Code(Counter(2)) at (prev + 0, 30) to (start + 0, 31)
+- Code(Counter(0)) at (prev + 1, 13) to (start + 0, 14)
+- Code(Counter(0)) at (prev + 1, 13) to (start + 0, 30)
+- Code(Counter(1)) at (prev + 0, 30) to (start + 0, 31)
 - Code(Zero) at (prev + 1, 16) to (start + 1, 10)
-- Code(Counter(4)) at (prev + 3, 13) to (start + 0, 14)
-- Code(Counter(3)) at (prev + 0, 18) to (start + 0, 23)
-- Code(Counter(4)) at (prev + 1, 16) to (start + 0, 20)
-- Code(Counter(5)) at (prev + 1, 20) to (start + 0, 25)
+- Code(Counter(3)) at (prev + 3, 13) to (start + 0, 14)
+- Code(Counter(2)) at (prev + 0, 18) to (start + 0, 23)
+- Code(Counter(3)) at (prev + 1, 16) to (start + 0, 20)
+- Code(Counter(3)) at (prev + 1, 20) to (start + 0, 25)
 - Code(Zero) at (prev + 1, 27) to (start + 0, 31)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 34)
-- Code(Counter(5)) at (prev + 1, 17) to (start + 0, 18)
-- Code(Counter(5)) at (prev + 1, 17) to (start + 0, 34)
+- Code(Counter(3)) at (prev + 1, 17) to (start + 0, 18)
+- Code(Counter(3)) at (prev + 1, 17) to (start + 0, 34)
 - Code(Expression(0, Sub)) at (prev + 0, 34) to (start + 0, 35)
-    = ((c0 + c4) - (c2 + c3))
+    = ((c0 + c3) - (c1 + c2))
 - Code(Zero) at (prev + 1, 20) to (start + 1, 14)
 - Code(Expression(3, Sub)) at (prev + 3, 9) to (start + 0, 15)
-    = (c3 - c4)
+    = (c2 - c3)
 - Code(Counter(0)) at (prev + 1, 5) to (start + 0, 6)
-Highest counter ID seen: c5
+Highest counter ID seen: c3
 
 Function name: <loops_branches::DisplayTest as core::fmt::Display>::fmt
 Raw bytes (112): 0x[01, 01, 04, 07, 0b, 01, 09, 05, 0d, 05, 09, 14, 01, 22, 05, 01, 11, 00, 01, 12, 01, 0a, 01, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 01, 01, 0d, 00, 0e, 01, 01, 0d, 00, 1e, 0d, 00, 1e, 00, 1f, 09, 02, 0d, 00, 0e, 05, 00, 12, 00, 17, 09, 01, 10, 00, 15, 00, 00, 16, 01, 0e, 09, 02, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, 09, 01, 11, 00, 12, 09, 01, 11, 00, 22, 02, 00, 22, 00, 23, 0e, 03, 09, 00, 0f, 01, 01, 05, 00, 06]
diff --git a/tests/coverage/try_error_result.cov-map b/tests/coverage/try_error_result.cov-map
index 03012f744c1..35b2c36a575 100644
--- a/tests/coverage/try_error_result.cov-map
+++ b/tests/coverage/try_error_result.cov-map
@@ -55,27 +55,31 @@ Number of file 0 mappings: 4
 Highest counter ID seen: c1
 
 Function name: try_error_result::test1
-Raw bytes (63): 0x[01, 01, 02, 09, 0d, 05, 09, 0b, 01, 0d, 01, 02, 17, 05, 07, 09, 00, 0e, 09, 02, 09, 04, 1a, 0d, 06, 0d, 00, 29, 11, 00, 29, 00, 2a, 00, 01, 0d, 00, 2a, 00, 00, 2a, 00, 2b, 02, 04, 0d, 00, 2a, 00, 00, 2a, 00, 2b, 06, 03, 05, 00, 0b, 01, 01, 01, 00, 02]
+Raw bytes (67): 0x[01, 01, 04, 07, 05, 01, 09, 05, 01, 05, 09, 0b, 01, 0d, 01, 02, 17, 05, 07, 09, 00, 0e, 09, 02, 09, 04, 1a, 02, 06, 0d, 00, 29, 02, 00, 29, 00, 2a, 00, 01, 0d, 00, 2a, 00, 00, 2a, 00, 2b, 0a, 04, 0d, 00, 2a, 00, 00, 2a, 00, 2b, 0e, 03, 05, 00, 0b, 01, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
-Number of expressions: 2
-- expression 0 operands: lhs = Counter(2), rhs = Counter(3)
-- expression 1 operands: lhs = Counter(1), rhs = Counter(2)
+Number of expressions: 4
+- expression 0 operands: lhs = Expression(1, Add), rhs = Counter(1)
+- expression 1 operands: lhs = Counter(0), rhs = Counter(2)
+- expression 2 operands: lhs = Counter(1), rhs = Counter(0)
+- expression 3 operands: lhs = Counter(1), rhs = Counter(2)
 Number of file 0 mappings: 11
 - Code(Counter(0)) at (prev + 13, 1) to (start + 2, 23)
 - Code(Counter(1)) at (prev + 7, 9) to (start + 0, 14)
 - Code(Counter(2)) at (prev + 2, 9) to (start + 4, 26)
-- Code(Counter(3)) at (prev + 6, 13) to (start + 0, 41)
-- Code(Counter(4)) at (prev + 0, 41) to (start + 0, 42)
+- Code(Expression(0, Sub)) at (prev + 6, 13) to (start + 0, 41)
+    = ((c0 + c2) - c1)
+- Code(Expression(0, Sub)) at (prev + 0, 41) to (start + 0, 42)
+    = ((c0 + c2) - c1)
 - Code(Zero) at (prev + 1, 13) to (start + 0, 42)
 - Code(Zero) at (prev + 0, 42) to (start + 0, 43)
-- Code(Expression(0, Sub)) at (prev + 4, 13) to (start + 0, 42)
-    = (c2 - c3)
+- Code(Expression(2, Sub)) at (prev + 4, 13) to (start + 0, 42)
+    = (c1 - c0)
 - Code(Zero) at (prev + 0, 42) to (start + 0, 43)
-- Code(Expression(1, Sub)) at (prev + 3, 5) to (start + 0, 11)
+- Code(Expression(3, Sub)) at (prev + 3, 5) to (start + 0, 11)
     = (c1 - c2)
 - Code(Counter(0)) at (prev + 1, 1) to (start + 0, 2)
-Highest counter ID seen: c4
+Highest counter ID seen: c2
 
 Function name: try_error_result::test2
 Raw bytes (336): 0x[01, 01, 36, 0d, 11, 0d, 3f, 11, 15, 0d, 37, 3b, 1d, 3f, 19, 11, 15, 0d, 3f, 11, 15, 0d, 3b, 3f, 19, 11, 15, 0d, 37, 3b, 1d, 3f, 19, 11, 15, 41, 53, 21, 25, 41, 21, 41, 53, 21, 25, 09, 73, 77, 2d, 0d, 29, 09, 0d, 09, 77, 0d, 29, 09, 73, 77, 2d, 0d, 29, 45, 8b, 01, 31, 35, 45, 31, 45, 8b, 01, 31, 35, 49, 9f, 01, 39, 3d, 49, 39, 49, 9f, 01, 39, 3d, 05, 09, ab, 01, 09, af, 01, 3d, b3, 01, 39, b7, 01, 35, bb, 01, 31, bf, 01, 2d, c3, 01, 29, c7, 01, 25, cb, 01, 21, cf, 01, 1d, d3, 01, 19, d7, 01, 15, 05, 11, 28, 01, 3d, 01, 03, 17, 05, 08, 09, 00, 0e, 09, 02, 09, 04, 1a, 0d, 06, 0d, 00, 2f, 11, 00, 2f, 00, 30, 02, 00, 31, 03, 35, 15, 04, 11, 00, 12, 1e, 02, 11, 04, 12, 32, 05, 11, 00, 14, 1e, 00, 17, 00, 41, 19, 00, 41, 00, 42, 26, 00, 43, 00, 5f, 1d, 00, 5f, 00, 60, 32, 01, 0d, 00, 20, 4e, 01, 11, 00, 14, 41, 00, 17, 00, 41, 21, 00, 41, 00, 42, 4a, 00, 43, 00, 60, 25, 00, 60, 00, 61, 4e, 01, 0d, 00, 20, 6e, 04, 11, 00, 14, 62, 00, 17, 00, 42, 29, 00, 42, 00, 43, 66, 00, 44, 00, 61, 2d, 00, 61, 00, 62, 6e, 01, 0d, 00, 20, 86, 01, 01, 11, 00, 14, 45, 00, 17, 01, 36, 31, 01, 36, 00, 37, 82, 01, 01, 12, 00, 2f, 35, 00, 2f, 00, 30, 86, 01, 01, 0d, 00, 20, 9a, 01, 01, 11, 00, 14, 49, 00, 17, 01, 36, 39, 02, 11, 00, 12, 96, 01, 01, 12, 00, 2f, 3d, 01, 11, 00, 12, 9a, 01, 02, 0d, 00, 20, a2, 01, 03, 05, 00, 0b, a6, 01, 01, 01, 00, 02]
diff --git a/tests/coverage/while.cov-map b/tests/coverage/while.cov-map
index d42aa8a7b84..5a6698128cb 100644
--- a/tests/coverage/while.cov-map
+++ b/tests/coverage/while.cov-map
@@ -1,12 +1,12 @@
 Function name: while::main
-Raw bytes (24): 0x[01, 01, 00, 04, 01, 01, 01, 01, 10, 05, 02, 0b, 00, 14, 00, 00, 15, 02, 06, 01, 03, 01, 00, 02]
+Raw bytes (24): 0x[01, 01, 00, 04, 01, 01, 01, 01, 10, 01, 02, 0b, 00, 14, 00, 00, 15, 02, 06, 01, 03, 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 + 1, 1) to (start + 1, 16)
-- Code(Counter(1)) at (prev + 2, 11) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 2, 11) to (start + 0, 20)
 - Code(Zero) at (prev + 0, 21) to (start + 2, 6)
 - Code(Counter(0)) at (prev + 3, 1) to (start + 0, 2)
-Highest counter ID seen: c1
+Highest counter ID seen: c0
 
diff --git a/tests/crashes/134905.rs b/tests/crashes/134905.rs
deleted file mode 100644
index 9f0f0f4b3f2..00000000000
--- a/tests/crashes/134905.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-//@ known-bug: #134905
-
-trait Iterate<'a> {
-    type Ty: Valid;
-}
-impl<'a, T> Iterate<'a> for T
-where
-    T: Check,
-{
-    default type Ty = ();
-}
-
-trait Check {}
-impl<'a, T> Eq for T where <T as Iterate<'a>>::Ty: Valid {}
-
-trait Valid {}
diff --git a/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-abort.mir b/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-abort.mir
index 22be48c47b2..38d00cfbabd 100644
--- a/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-abort.mir
+++ b/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-abort.mir
@@ -4,22 +4,21 @@ fn slice_iter_generic_is_empty(_1: &std::slice::Iter<'_, T>) -> bool {
     debug it => _1;
     let mut _0: bool;
     scope 1 (inlined <std::slice::Iter<'_, T> as ExactSizeIterator>::is_empty) {
-        let mut _2: *const *const T;
-        let mut _3: *const std::ptr::NonNull<T>;
-        let mut _8: *const T;
+        let mut _2: *const T;
+        let mut _7: *const T;
         scope 2 {
-            let _4: std::ptr::NonNull<T>;
-            let _9: usize;
+            let _3: std::ptr::NonNull<T>;
+            let _8: usize;
             scope 3 {
             }
             scope 4 {
-                scope 8 (inlined <NonNull<T> as PartialEq>::eq) {
-                    let mut _5: std::ptr::NonNull<T>;
+                scope 7 (inlined <NonNull<T> as PartialEq>::eq) {
+                    let mut _4: std::ptr::NonNull<T>;
+                    let mut _5: *mut T;
                     let mut _6: *mut T;
-                    let mut _7: *mut T;
-                    scope 9 (inlined NonNull::<T>::as_ptr) {
+                    scope 8 (inlined NonNull::<T>::as_ptr) {
                     }
-                    scope 10 (inlined NonNull::<T>::as_ptr) {
+                    scope 9 (inlined NonNull::<T>::as_ptr) {
                     }
                 }
             }
@@ -27,50 +26,45 @@ fn slice_iter_generic_is_empty(_1: &std::slice::Iter<'_, T>) -> bool {
                 scope 6 (inlined std::ptr::const_ptr::<impl *const T>::cast::<()>) {
                 }
             }
-            scope 7 (inlined std::ptr::const_ptr::<impl *const *const T>::cast::<NonNull<T>>) {
-            }
         }
     }
 
     bb0: {
-        StorageLive(_9);
         StorageLive(_8);
-        StorageLive(_4);
+        StorageLive(_7);
+        StorageLive(_3);
         switchInt(const <T as std::mem::SizedTypeProperties>::IS_ZST) -> [0: bb1, otherwise: bb2];
     }
 
     bb1: {
-        StorageLive(_3);
         StorageLive(_2);
-        _2 = &raw const ((*_1).1: *const T);
-        _3 = copy _2 as *const std::ptr::NonNull<T> (PtrToPtr);
+        _2 = copy ((*_1).1: *const T);
+        _3 = move _2 as std::ptr::NonNull<T> (Transmute);
         StorageDead(_2);
-        _4 = copy (*_3);
-        StorageDead(_3);
-        StorageLive(_6);
         StorageLive(_5);
-        _5 = copy ((*_1).0: std::ptr::NonNull<T>);
-        _6 = copy _5 as *mut T (Transmute);
-        StorageDead(_5);
-        StorageLive(_7);
-        _7 = copy _4 as *mut T (Transmute);
-        _0 = Eq(move _6, move _7);
-        StorageDead(_7);
+        StorageLive(_4);
+        _4 = copy ((*_1).0: std::ptr::NonNull<T>);
+        _5 = copy _4 as *mut T (Transmute);
+        StorageDead(_4);
+        StorageLive(_6);
+        _6 = copy _3 as *mut T (Transmute);
+        _0 = Eq(move _5, move _6);
         StorageDead(_6);
+        StorageDead(_5);
         goto -> bb3;
     }
 
     bb2: {
-        _8 = copy ((*_1).1: *const T);
-        _9 = copy _8 as usize (Transmute);
-        _0 = Eq(copy _9, const 0_usize);
+        _7 = copy ((*_1).1: *const T);
+        _8 = copy _7 as usize (Transmute);
+        _0 = Eq(copy _8, const 0_usize);
         goto -> bb3;
     }
 
     bb3: {
-        StorageDead(_4);
+        StorageDead(_3);
+        StorageDead(_7);
         StorageDead(_8);
-        StorageDead(_9);
         return;
     }
 }
diff --git a/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-unwind.mir
index 22be48c47b2..38d00cfbabd 100644
--- a/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-unwind.mir
+++ b/tests/mir-opt/pre-codegen/slice_iter.slice_iter_generic_is_empty.PreCodegen.after.panic-unwind.mir
@@ -4,22 +4,21 @@ fn slice_iter_generic_is_empty(_1: &std::slice::Iter<'_, T>) -> bool {
     debug it => _1;
     let mut _0: bool;
     scope 1 (inlined <std::slice::Iter<'_, T> as ExactSizeIterator>::is_empty) {
-        let mut _2: *const *const T;
-        let mut _3: *const std::ptr::NonNull<T>;
-        let mut _8: *const T;
+        let mut _2: *const T;
+        let mut _7: *const T;
         scope 2 {
-            let _4: std::ptr::NonNull<T>;
-            let _9: usize;
+            let _3: std::ptr::NonNull<T>;
+            let _8: usize;
             scope 3 {
             }
             scope 4 {
-                scope 8 (inlined <NonNull<T> as PartialEq>::eq) {
-                    let mut _5: std::ptr::NonNull<T>;
+                scope 7 (inlined <NonNull<T> as PartialEq>::eq) {
+                    let mut _4: std::ptr::NonNull<T>;
+                    let mut _5: *mut T;
                     let mut _6: *mut T;
-                    let mut _7: *mut T;
-                    scope 9 (inlined NonNull::<T>::as_ptr) {
+                    scope 8 (inlined NonNull::<T>::as_ptr) {
                     }
-                    scope 10 (inlined NonNull::<T>::as_ptr) {
+                    scope 9 (inlined NonNull::<T>::as_ptr) {
                     }
                 }
             }
@@ -27,50 +26,45 @@ fn slice_iter_generic_is_empty(_1: &std::slice::Iter<'_, T>) -> bool {
                 scope 6 (inlined std::ptr::const_ptr::<impl *const T>::cast::<()>) {
                 }
             }
-            scope 7 (inlined std::ptr::const_ptr::<impl *const *const T>::cast::<NonNull<T>>) {
-            }
         }
     }
 
     bb0: {
-        StorageLive(_9);
         StorageLive(_8);
-        StorageLive(_4);
+        StorageLive(_7);
+        StorageLive(_3);
         switchInt(const <T as std::mem::SizedTypeProperties>::IS_ZST) -> [0: bb1, otherwise: bb2];
     }
 
     bb1: {
-        StorageLive(_3);
         StorageLive(_2);
-        _2 = &raw const ((*_1).1: *const T);
-        _3 = copy _2 as *const std::ptr::NonNull<T> (PtrToPtr);
+        _2 = copy ((*_1).1: *const T);
+        _3 = move _2 as std::ptr::NonNull<T> (Transmute);
         StorageDead(_2);
-        _4 = copy (*_3);
-        StorageDead(_3);
-        StorageLive(_6);
         StorageLive(_5);
-        _5 = copy ((*_1).0: std::ptr::NonNull<T>);
-        _6 = copy _5 as *mut T (Transmute);
-        StorageDead(_5);
-        StorageLive(_7);
-        _7 = copy _4 as *mut T (Transmute);
-        _0 = Eq(move _6, move _7);
-        StorageDead(_7);
+        StorageLive(_4);
+        _4 = copy ((*_1).0: std::ptr::NonNull<T>);
+        _5 = copy _4 as *mut T (Transmute);
+        StorageDead(_4);
+        StorageLive(_6);
+        _6 = copy _3 as *mut T (Transmute);
+        _0 = Eq(move _5, move _6);
         StorageDead(_6);
+        StorageDead(_5);
         goto -> bb3;
     }
 
     bb2: {
-        _8 = copy ((*_1).1: *const T);
-        _9 = copy _8 as usize (Transmute);
-        _0 = Eq(copy _9, const 0_usize);
+        _7 = copy ((*_1).1: *const T);
+        _8 = copy _7 as usize (Transmute);
+        _0 = Eq(copy _8, const 0_usize);
         goto -> bb3;
     }
 
     bb3: {
-        StorageDead(_4);
+        StorageDead(_3);
+        StorageDead(_7);
         StorageDead(_8);
-        StorageDead(_9);
         return;
     }
 }
diff --git a/tests/run-make/rustc-help/help-v.stdout b/tests/run-make/rustc-help/help-v.stdout
index 8f6fde69c29..382b1c96682 100644
--- a/tests/run-make/rustc-help/help-v.stdout
+++ b/tests/run-make/rustc-help/help-v.stdout
@@ -32,7 +32,7 @@ Options:
         --print [crate-name|file-names|sysroot|target-libdir|cfg|check-cfg|calling-conventions|target-list|target-cpus|target-features|relocation-models|code-models|tls-models|target-spec-json|all-target-specs-json|native-static-libs|stack-protector-strategies|link-args|deployment-target]
                         Compiler information to print on stdout
     -g                  Equivalent to -C debuginfo=2
-    -O                  Equivalent to -C opt-level=2
+    -O                  Equivalent to -C opt-level=3
     -o FILENAME         Write output to <filename>
         --out-dir DIR   Write output to compiler-chosen filename in <dir>
         --explain OPT   Provide a detailed explanation of an error message
diff --git a/tests/run-make/rustc-help/help.stdout b/tests/run-make/rustc-help/help.stdout
index 131efa93282..08bb7f85098 100644
--- a/tests/run-make/rustc-help/help.stdout
+++ b/tests/run-make/rustc-help/help.stdout
@@ -32,7 +32,7 @@ Options:
         --print [crate-name|file-names|sysroot|target-libdir|cfg|check-cfg|calling-conventions|target-list|target-cpus|target-features|relocation-models|code-models|tls-models|target-spec-json|all-target-specs-json|native-static-libs|stack-protector-strategies|link-args|deployment-target]
                         Compiler information to print on stdout
     -g                  Equivalent to -C debuginfo=2
-    -O                  Equivalent to -C opt-level=2
+    -O                  Equivalent to -C opt-level=3
     -o FILENAME         Write output to <filename>
         --out-dir DIR   Write output to compiler-chosen filename in <dir>
         --explain OPT   Provide a detailed explanation of an error message
diff --git a/tests/rustdoc-gui/scrape-examples-button-focus.goml b/tests/rustdoc-gui/scrape-examples-button-focus.goml
index d53993ac08b..12246a37661 100644
--- a/tests/rustdoc-gui/scrape-examples-button-focus.goml
+++ b/tests/rustdoc-gui/scrape-examples-button-focus.goml
@@ -19,3 +19,29 @@ press-key: "Enter"
 assert-property: (".scraped-example-list > .scraped-example .rust", {
     "scrollTop": |initialScrollTop|
 }, NEAR)
+
+// Make sure all the buttons are the same size
+store-property: (".scraped-example-list > .scraped-example .prev", {
+    "offsetWidth": buttonWidth,
+    "offsetHeight": buttonHeight,
+})
+assert-property: (".scraped-example-list > .scraped-example .prev", {
+    "offsetWidth": |buttonWidth|,
+    "offsetHeight": |buttonHeight|,
+    "title": "Previous usage",
+})
+assert-property: (".scraped-example-list > .scraped-example .next", {
+    "offsetWidth": |buttonWidth|,
+    "offsetHeight": |buttonHeight|,
+    "title": "Next usage",
+})
+assert-property: (".scraped-example-list > .scraped-example .expand", {
+    "offsetWidth": |buttonWidth|,
+    "offsetHeight": |buttonHeight|,
+    "title": "Show all",
+})
+assert-property: (".scraped-example-list > .scraped-example .copy-button", {
+    "offsetWidth": |buttonWidth|,
+    "offsetHeight": |buttonHeight|,
+    "title": "Copy code to clipboard",
+})
diff --git a/tests/rustdoc-js-std/vec-new.js b/tests/rustdoc-js-std/vec-new.js
index bb122ff4398..0eae8b6c197 100644
--- a/tests/rustdoc-js-std/vec-new.js
+++ b/tests/rustdoc-js-std/vec-new.js
@@ -9,7 +9,7 @@ const EXPECTED = [
     {
         'query': 'prelude::vec',
         'others': [
-            { 'path': 'std::prelude::rust_2024', 'name': 'Vec' },
+            { 'path': 'std::prelude::v1', 'name': 'Vec' },
         ],
     },
     {
diff --git a/tests/ui/associated-consts/associated-const-in-trait.rs b/tests/ui/associated-consts/associated-const-in-trait.rs
index 90ad596b23e..4d88f4ff531 100644
--- a/tests/ui/associated-consts/associated-const-in-trait.rs
+++ b/tests/ui/associated-consts/associated-const-in-trait.rs
@@ -8,6 +8,7 @@ impl dyn Trait {
     //~^ ERROR the trait `Trait` is not dyn compatible [E0038]
     const fn n() -> usize { Self::N }
     //~^ ERROR the trait `Trait` is not dyn compatible [E0038]
+    //~| ERROR the trait `Trait` is not dyn compatible
 }
 
 fn main() {}
diff --git a/tests/ui/associated-consts/associated-const-in-trait.stderr b/tests/ui/associated-consts/associated-const-in-trait.stderr
index 5aaa6f6be05..fba7f53c097 100644
--- a/tests/ui/associated-consts/associated-const-in-trait.stderr
+++ b/tests/ui/associated-consts/associated-const-in-trait.stderr
@@ -30,6 +30,22 @@ LL |     const N: usize;
    |           ^ ...because it contains this associated `const`
    = help: consider moving `N` to another trait
 
-error: aborting due to 2 previous errors
+error[E0038]: the trait `Trait` is not dyn compatible
+  --> $DIR/associated-const-in-trait.rs:9:29
+   |
+LL |     const fn n() -> usize { Self::N }
+   |                             ^^^^^^^ `Trait` is not dyn compatible
+   |
+note: for a trait to be dyn compatible it needs to allow building a vtable
+      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
+  --> $DIR/associated-const-in-trait.rs:4:11
+   |
+LL | trait Trait {
+   |       ----- this trait is not dyn compatible...
+LL |     const N: usize;
+   |           ^ ...because it contains this associated `const`
+   = help: consider moving `N` to another trait
+
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0038`.
diff --git a/tests/ui/associated-consts/wrong-projection-self-ty-invalid-bivariant-arg2.stderr b/tests/ui/associated-consts/wrong-projection-self-ty-invalid-bivariant-arg2.stderr
index 18d458aea80..165e89010b6 100644
--- a/tests/ui/associated-consts/wrong-projection-self-ty-invalid-bivariant-arg2.stderr
+++ b/tests/ui/associated-consts/wrong-projection-self-ty-invalid-bivariant-arg2.stderr
@@ -1,15 +1,3 @@
-error[E0599]: no associated item named `C` found for struct `Fail<i32, u32>` in the current scope
-  --> $DIR/wrong-projection-self-ty-invalid-bivariant-arg2.rs:15:23
-   |
-LL | struct Fail<T: Proj<Assoc = U>, U>(T);
-   | ---------------------------------- associated item `C` not found for this struct
-...
-LL |     Fail::<i32, u32>::C
-   |                       ^ associated item not found in `Fail<i32, u32>`
-   |
-   = note: the associated item was found for
-           - `Fail<i32, i32>`
-
 error[E0271]: type mismatch resolving `<i32 as Proj>::Assoc == u32`
   --> $DIR/wrong-projection-self-ty-invalid-bivariant-arg2.rs:15:5
    |
@@ -27,6 +15,18 @@ note: required by a bound in `Fail`
 LL | struct Fail<T: Proj<Assoc = U>, U>(T);
    |                     ^^^^^^^^^ required by this bound in `Fail`
 
+error[E0599]: no associated item named `C` found for struct `Fail<i32, u32>` in the current scope
+  --> $DIR/wrong-projection-self-ty-invalid-bivariant-arg2.rs:15:23
+   |
+LL | struct Fail<T: Proj<Assoc = U>, U>(T);
+   | ---------------------------------- associated item `C` not found for this struct
+...
+LL |     Fail::<i32, u32>::C
+   |                       ^ associated item not found in `Fail<i32, u32>`
+   |
+   = note: the associated item was found for
+           - `Fail<i32, i32>`
+
 error: aborting due to 2 previous errors
 
 Some errors have detailed explanations: E0271, E0599.
diff --git a/tests/ui/associated-types/defaults-suitability.current.stderr b/tests/ui/associated-types/defaults-suitability.current.stderr
index b9ea541e981..5e19674250f 100644
--- a/tests/ui/associated-types/defaults-suitability.current.stderr
+++ b/tests/ui/associated-types/defaults-suitability.current.stderr
@@ -134,9 +134,8 @@ LL |     type Baz = T;
    |          --- required by a bound in this associated type
 help: consider further restricting type parameter `T` with trait `Clone`
    |
-LL -     Self::Baz: Clone,
-LL +     Self::Baz: Clone, T: std::clone::Clone
-   |
+LL |     Self::Baz: Clone, T: std::clone::Clone
+   |                       ++++++++++++++++++++
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/associated-types/defaults-suitability.next.stderr b/tests/ui/associated-types/defaults-suitability.next.stderr
index b9ea541e981..5e19674250f 100644
--- a/tests/ui/associated-types/defaults-suitability.next.stderr
+++ b/tests/ui/associated-types/defaults-suitability.next.stderr
@@ -134,9 +134,8 @@ LL |     type Baz = T;
    |          --- required by a bound in this associated type
 help: consider further restricting type parameter `T` with trait `Clone`
    |
-LL -     Self::Baz: Clone,
-LL +     Self::Baz: Clone, T: std::clone::Clone
-   |
+LL |     Self::Baz: Clone, T: std::clone::Clone
+   |                       ++++++++++++++++++++
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/associated-types/hr-associated-type-bound-object.rs b/tests/ui/associated-types/hr-associated-type-bound-object.rs
index fec253f9289..825e129dbbd 100644
--- a/tests/ui/associated-types/hr-associated-type-bound-object.rs
+++ b/tests/ui/associated-types/hr-associated-type-bound-object.rs
@@ -9,6 +9,7 @@ fn f<'a, T: X<'a> + ?Sized>(x: &<T as X<'a>>::U) {
     <<T as X<'_>>::U>::clone(x);
     //~^ ERROR the trait bound `for<'b> <T as X<'b>>::U: Clone` is not satisfied
     //~| ERROR the trait bound `for<'b> <T as X<'b>>::U: Clone` is not satisfied
+    //~| ERROR the trait bound `for<'b> <T as X<'b>>::U: Clone` is not satisfied
     //~| ERROR the trait bound `<T as X<'_>>::U: Clone` is not satisfied
 }
 
diff --git a/tests/ui/associated-types/hr-associated-type-bound-object.stderr b/tests/ui/associated-types/hr-associated-type-bound-object.stderr
index 322d6e7b947..5144cfe6d3e 100644
--- a/tests/ui/associated-types/hr-associated-type-bound-object.stderr
+++ b/tests/ui/associated-types/hr-associated-type-bound-object.stderr
@@ -51,6 +51,25 @@ error[E0277]: the trait bound `for<'b> <T as X<'b>>::U: Clone` is not satisfied
   --> $DIR/hr-associated-type-bound-object.rs:9:5
    |
 LL |     <<T as X<'_>>::U>::clone(x);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'b> Clone` is not implemented for `<T as X<'b>>::U`
+   |
+note: required by a bound in `X`
+  --> $DIR/hr-associated-type-bound-object.rs:3:33
+   |
+LL | trait X<'a>
+   |       - required by a bound in this trait
+LL | where
+LL |     for<'b> <Self as X<'b>>::U: Clone,
+   |                                 ^^^^^ required by this bound in `X`
+help: consider further restricting the associated type
+   |
+LL | fn f<'a, T: X<'a> + ?Sized>(x: &<T as X<'a>>::U) where for<'b> <T as X<'b>>::U: Clone {
+   |                                                  ++++++++++++++++++++++++++++++++++++
+
+error[E0277]: the trait bound `for<'b> <T as X<'b>>::U: Clone` is not satisfied
+  --> $DIR/hr-associated-type-bound-object.rs:9:5
+   |
+LL |     <<T as X<'_>>::U>::clone(x);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'b> Clone` is not implemented for `<T as X<'b>>::U`
    |
 note: required by a bound in `X`
@@ -66,6 +85,6 @@ help: consider further restricting the associated type
 LL | fn f<'a, T: X<'a> + ?Sized>(x: &<T as X<'a>>::U) where for<'b> <T as X<'b>>::U: Clone {
    |                                                  ++++++++++++++++++++++++++++++++++++
 
-error: aborting due to 4 previous errors
+error: aborting due to 5 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/associated-types/hr-associated-type-bound-param-2.rs b/tests/ui/associated-types/hr-associated-type-bound-param-2.rs
index b1a6fe87159..673f02c7cd0 100644
--- a/tests/ui/associated-types/hr-associated-type-bound-param-2.rs
+++ b/tests/ui/associated-types/hr-associated-type-bound-param-2.rs
@@ -10,6 +10,7 @@ where
         <T::W>::clone(x);
         //~^ the trait bound `str: Clone` is not satisfied
         //~| the trait bound `str: Clone` is not satisfied
+        //~| the trait bound `str: Clone` is not satisfied
     }
 }
 
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 74cc2083d26..8997832ab52 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
@@ -15,7 +15,7 @@ LL |     for<'b> <T as Z<'b, u16>>::W: Clone,
    |                                   ^^^^^ required by this bound in `Z`
 
 error[E0277]: the trait bound `str: Clone` is not satisfied
-  --> $DIR/hr-associated-type-bound-param-2.rs:17:14
+  --> $DIR/hr-associated-type-bound-param-2.rs:18:14
    |
 LL |     type W = str;
    |              ^^^ the trait `Clone` is not implemented for `str`
@@ -67,6 +67,22 @@ error[E0277]: the trait bound `str: Clone` is not satisfied
   --> $DIR/hr-associated-type-bound-param-2.rs:10:9
    |
 LL |         <T::W>::clone(x);
+   |         ^^^^^^^^^^^^^ the trait `Clone` is not implemented for `str`
+   |
+   = help: the trait `Clone` is implemented for `String`
+note: required by a bound in `Z`
+  --> $DIR/hr-associated-type-bound-param-2.rs:6:35
+   |
+LL | trait Z<'a, T: ?Sized>
+   |       - required by a bound in this trait
+...
+LL |     for<'b> <T as Z<'b, u16>>::W: Clone,
+   |                                   ^^^^^ required by this bound in `Z`
+
+error[E0277]: the trait bound `str: Clone` is not satisfied
+  --> $DIR/hr-associated-type-bound-param-2.rs:10:9
+   |
+LL |         <T::W>::clone(x);
    |         ^^^^^^^^^^^^^^^^ the trait `Clone` is not implemented for `str`
    |
    = help: the trait `Clone` is implemented for `String`
@@ -80,7 +96,7 @@ LL |     for<'b> <T as Z<'b, u16>>::W: Clone,
    |                                   ^^^^^ required by this bound in `Z`
 
 error[E0277]: the trait bound `str: Clone` is not satisfied
-  --> $DIR/hr-associated-type-bound-param-2.rs:22:10
+  --> $DIR/hr-associated-type-bound-param-2.rs:23:10
    |
 LL |     1u16.h("abc");
    |          ^ the trait `Clone` is not implemented for `str`
@@ -95,6 +111,6 @@ LL |     for<'b> <T as Z<'b, u16>>::W: Clone,
 LL |     fn h(&self, x: &T::W) {
    |        - required by a bound in this associated function
 
-error: aborting due to 6 previous errors
+error: aborting due to 7 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/associated-types/issue-38821.stderr b/tests/ui/associated-types/issue-38821.stderr
index b29e9cc16e2..dc919299710 100644
--- a/tests/ui/associated-types/issue-38821.stderr
+++ b/tests/ui/associated-types/issue-38821.stderr
@@ -13,9 +13,8 @@ LL | impl<T: NotNull> IntoNullable for T {
    |         unsatisfied trait bound introduced here
 help: consider extending the `where` clause, but there might be an alternative better way to express this requirement
    |
-LL -     Expr: Expression<SqlType=<Col::SqlType as IntoNullable>::Nullable>,
-LL +     Expr: Expression<SqlType=<Col::SqlType as IntoNullable>::Nullable>, <Col as Expression>::SqlType: NotNull
-   |
+LL |     Expr: Expression<SqlType=<Col::SqlType as IntoNullable>::Nullable>, <Col as Expression>::SqlType: NotNull
+   |                                                                         +++++++++++++++++++++++++++++++++++++
 
 error[E0277]: the trait bound `<Col as Expression>::SqlType: NotNull` is not satisfied
   --> $DIR/issue-38821.rs:40:1
@@ -38,9 +37,8 @@ LL | impl<T: NotNull> IntoNullable for T {
    |         unsatisfied trait bound introduced here
 help: consider extending the `where` clause, but there might be an alternative better way to express this requirement
    |
-LL -     Expr: Expression<SqlType=<Col::SqlType as IntoNullable>::Nullable>,
-LL +     Expr: Expression<SqlType=<Col::SqlType as IntoNullable>::Nullable>, <Col as Expression>::SqlType: NotNull
-   |
+LL |     Expr: Expression<SqlType=<Col::SqlType as IntoNullable>::Nullable>, <Col as Expression>::SqlType: NotNull
+   |                                                                         +++++++++++++++++++++++++++++++++++++
 
 error[E0277]: the trait bound `<Col as Expression>::SqlType: NotNull` is not satisfied
   --> $DIR/issue-38821.rs:23:10
diff --git a/tests/ui/associated-types/issue-54108.current.stderr b/tests/ui/associated-types/issue-54108.current.stderr
index 1b2285b214f..115a591c68f 100644
--- a/tests/ui/associated-types/issue-54108.current.stderr
+++ b/tests/ui/associated-types/issue-54108.current.stderr
@@ -12,9 +12,8 @@ LL |     type Size: Add<Output = Self::Size>;
    |                ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `Encoder::Size`
 help: consider further restricting the associated type
    |
-LL -     T: SubEncoder,
-LL +     T: SubEncoder, <T as SubEncoder>::ActualSize: Add
-   |
+LL |     T: SubEncoder, <T as SubEncoder>::ActualSize: Add
+   |                    ++++++++++++++++++++++++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/associated-types/issue-54108.next.stderr b/tests/ui/associated-types/issue-54108.next.stderr
index cc80ab63901..e6d65d8246a 100644
--- a/tests/ui/associated-types/issue-54108.next.stderr
+++ b/tests/ui/associated-types/issue-54108.next.stderr
@@ -12,9 +12,8 @@ LL |     type Size: Add<Output = Self::Size>;
    |                    ^^^^^^^^^^^^^^^^^^^ required by this bound in `Encoder::Size`
 help: consider further restricting the associated type
    |
-LL -     T: SubEncoder,
-LL +     T: SubEncoder, <T as SubEncoder>::ActualSize: Add
-   |
+LL |     T: SubEncoder, <T as SubEncoder>::ActualSize: Add
+   |                    ++++++++++++++++++++++++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/attributes/rustc_confusables.stderr b/tests/ui/attributes/rustc_confusables.stderr
index f475e9c494e..dc71d974daf 100644
--- a/tests/ui/attributes/rustc_confusables.stderr
+++ b/tests/ui/attributes/rustc_confusables.stderr
@@ -35,9 +35,8 @@ LL |     x.inser();
    |
 help: there is a method `insert` with a similar name
    |
-LL -     x.inser();
-LL +     x.insert();
-   |
+LL |     x.insert();
+   |            +
 
 error[E0599]: no method named `foo` found for struct `rustc_confusables_across_crate::BTreeSet` in the current scope
   --> $DIR/rustc_confusables.rs:15:7
diff --git a/tests/ui/attributes/rustc_confusables_std_cases.stderr b/tests/ui/attributes/rustc_confusables_std_cases.stderr
index b9acf2d31ab..f2d9ebe2c0e 100644
--- a/tests/ui/attributes/rustc_confusables_std_cases.stderr
+++ b/tests/ui/attributes/rustc_confusables_std_cases.stderr
@@ -38,9 +38,8 @@ LL |     let mut x = VecDeque::new();
    |         ----- earlier `x` shadowed here with type `VecDeque`
 help: you might have meant to use `push_back`
    |
-LL -     x.push(1);
-LL +     x.push_back(1);
-   |
+LL |     x.push_back(1);
+   |           +++++
 
 error[E0599]: no method named `length` found for struct `Vec<{integer}>` in the current scope
   --> $DIR/rustc_confusables_std_cases.rs:15:7
@@ -98,9 +97,8 @@ note: method defined here
   --> $SRC_DIR/alloc/src/string.rs:LL:COL
 help: you might have meant to use `push_str`
    |
-LL -     String::new().push("");
-LL +     String::new().push_str("");
-   |
+LL |     String::new().push_str("");
+   |                       ++++
 
 error[E0599]: no method named `append` found for struct `String` in the current scope
   --> $DIR/rustc_confusables_std_cases.rs:24:19
diff --git a/tests/ui/auto-traits/assoc-ty.next.stderr b/tests/ui/auto-traits/assoc-ty.next.stderr
index b9f56d6c99c..4ce00d17475 100644
--- a/tests/ui/auto-traits/assoc-ty.next.stderr
+++ b/tests/ui/auto-traits/assoc-ty.next.stderr
@@ -21,20 +21,21 @@ LL | | }
    = help: add `#![feature(auto_traits)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
-error[E0308]: mismatched types
-  --> $DIR/assoc-ty.rs:15:36
+error[E0271]: type mismatch resolving `<() as Trait>::Output normalizes-to _`
+  --> $DIR/assoc-ty.rs:15:12
    |
 LL |     let _: <() as Trait>::Output = ();
-   |            ---------------------   ^^ types differ
-   |            |
-   |            expected due to this
+   |            ^^^^^^^^^^^^^^^^^^^^^ types differ
+
+error[E0271]: type mismatch resolving `<() as Trait>::Output normalizes-to _`
+  --> $DIR/assoc-ty.rs:15:12
+   |
+LL |     let _: <() as Trait>::Output = ();
+   |            ^^^^^^^^^^^^^^^^^^^^^ types differ
    |
-   = note: expected associated type `<() as Trait>::Output`
-                    found unit type `()`
-   = help: consider constraining the associated type `<() as Trait>::Output` to `()` or calling a method that returns `<() as Trait>::Output`
-   = note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
-error: aborting due to 3 previous errors
+error: aborting due to 4 previous errors
 
-Some errors have detailed explanations: E0308, E0380, E0658.
-For more information about an error, try `rustc --explain E0308`.
+Some errors have detailed explanations: E0271, E0380, E0658.
+For more information about an error, try `rustc --explain E0271`.
diff --git a/tests/ui/auto-traits/assoc-ty.rs b/tests/ui/auto-traits/assoc-ty.rs
index ada75147f6e..efbfead9cd0 100644
--- a/tests/ui/auto-traits/assoc-ty.rs
+++ b/tests/ui/auto-traits/assoc-ty.rs
@@ -13,5 +13,7 @@ auto trait Trait {
 
 fn main() {
     let _: <() as Trait>::Output = ();
-    //~^ ERROR mismatched types
+    //[current]~^ ERROR mismatched types
+    //[next]~^^ ERROR type mismatch resolving `<() as Trait>::Output normalizes-to _`
+    //[next]~| ERROR type mismatch resolving `<() as Trait>::Output normalizes-to _`
 }
diff --git a/tests/ui/borrowck/issue-115259-suggest-iter-mut.stderr b/tests/ui/borrowck/issue-115259-suggest-iter-mut.stderr
index 53b833e7c91..61c01f0f024 100644
--- a/tests/ui/borrowck/issue-115259-suggest-iter-mut.stderr
+++ b/tests/ui/borrowck/issue-115259-suggest-iter-mut.stderr
@@ -8,9 +8,8 @@ LL |         self.layers.iter().fold(0, |result, mut layer| result + layer.proce
    |
 help: you may want to use `iter_mut` here
    |
-LL -         self.layers.iter().fold(0, |result, mut layer| result + layer.process())
-LL +         self.layers.iter_mut().fold(0, |result, mut layer| result + layer.process())
-   |
+LL |         self.layers.iter_mut().fold(0, |result, mut layer| result + layer.process())
+   |                         ++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/issue-62387-suggest-iter-mut-2.stderr b/tests/ui/borrowck/issue-62387-suggest-iter-mut-2.stderr
index 86d53012cf3..c6955317d87 100644
--- a/tests/ui/borrowck/issue-62387-suggest-iter-mut-2.stderr
+++ b/tests/ui/borrowck/issue-62387-suggest-iter-mut-2.stderr
@@ -8,9 +8,8 @@ LL |             vec.iter().flat_map(|container| container.things()).cloned().co
    |
 help: you may want to use `iter_mut` here
    |
-LL -             vec.iter().flat_map(|container| container.things()).cloned().collect::<Vec<PathBuf>>();
-LL +             vec.iter_mut().flat_map(|container| container.things()).cloned().collect::<Vec<PathBuf>>();
-   |
+LL |             vec.iter_mut().flat_map(|container| container.things()).cloned().collect::<Vec<PathBuf>>();
+   |                     ++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/issue-62387-suggest-iter-mut.stderr b/tests/ui/borrowck/issue-62387-suggest-iter-mut.stderr
index f0a17d76a67..ae4920b2a8c 100644
--- a/tests/ui/borrowck/issue-62387-suggest-iter-mut.stderr
+++ b/tests/ui/borrowck/issue-62387-suggest-iter-mut.stderr
@@ -8,9 +8,8 @@ LL |     v.iter().for_each(|a| a.double());
    |
 help: you may want to use `iter_mut` here
    |
-LL -     v.iter().for_each(|a| a.double());
-LL +     v.iter_mut().for_each(|a| a.double());
-   |
+LL |     v.iter_mut().for_each(|a| a.double());
+   |           ++++
 
 error[E0596]: cannot borrow `*a` as mutable, as it is behind a `&` reference
   --> $DIR/issue-62387-suggest-iter-mut.rs:25:39
@@ -22,9 +21,8 @@ LL |     v.iter().rev().rev().for_each(|a| a.double());
    |
 help: you may want to use `iter_mut` here
    |
-LL -     v.iter().rev().rev().for_each(|a| a.double());
-LL +     v.iter_mut().rev().rev().for_each(|a| a.double());
-   |
+LL |     v.iter_mut().rev().rev().for_each(|a| a.double());
+   |           ++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/c-variadic/issue-86053-1.stderr b/tests/ui/c-variadic/issue-86053-1.stderr
index 4ad3b73fd66..ce31f0d300f 100644
--- a/tests/ui/c-variadic/issue-86053-1.stderr
+++ b/tests/ui/c-variadic/issue-86053-1.stderr
@@ -63,9 +63,8 @@ LL |     self , ... ,   self ,   self , ... ) where F : FnOnce ( & 'a & 'b usize
    |
 help: a trait with a similar name exists
    |
-LL -     self , ... ,   self ,   self , ... ) where F : FnOnce ( & 'a & 'b usize ) {
-LL +     self , ... ,   self ,   self , ... ) where Fn : FnOnce ( & 'a & 'b usize ) {
-   |
+LL |     self , ... ,   self ,   self , ... ) where Fn : FnOnce ( & 'a & 'b usize ) {
+   |                                                 +
 help: you might be missing a type parameter
    |
 LL | fn ordering4 < 'a , 'b, F     > ( a :            ,   self , self ,   self ,
diff --git a/tests/ui/cfg/cfg-method-receiver.stderr b/tests/ui/cfg/cfg-method-receiver.stderr
index 639413b90fa..44f3d8d058e 100644
--- a/tests/ui/cfg/cfg-method-receiver.stderr
+++ b/tests/ui/cfg/cfg-method-receiver.stderr
@@ -16,9 +16,8 @@ LL |     cbor_map! { #[cfg(test)] 4};
    = note: this error originates in the macro `cbor_map` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: you must specify a concrete type for this numeric value, like `i32`
    |
-LL -     cbor_map! { #[cfg(test)] 4};
-LL +     cbor_map! { #[cfg(test)] 4_i32};
-   |
+LL |     cbor_map! { #[cfg(test)] 4_i32};
+   |                               ++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/check-cfg/diagnotics.cargo.stderr b/tests/ui/check-cfg/diagnotics.cargo.stderr
index ab7111eca24..ebfc9a935d2 100644
--- a/tests/ui/check-cfg/diagnotics.cargo.stderr
+++ b/tests/ui/check-cfg/diagnotics.cargo.stderr
@@ -17,9 +17,8 @@ LL | #[cfg(featur = "foo")]
    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
 help: there is a config with a similar name and value
    |
-LL - #[cfg(featur = "foo")]
-LL + #[cfg(feature = "foo")]
-   |
+LL | #[cfg(feature = "foo")]
+   |             +
 
 warning: unexpected `cfg` condition name: `featur`
   --> $DIR/diagnotics.rs:17:7
diff --git a/tests/ui/check-cfg/diagnotics.rustc.stderr b/tests/ui/check-cfg/diagnotics.rustc.stderr
index 4aae1f00e70..8860b3ff5da 100644
--- a/tests/ui/check-cfg/diagnotics.rustc.stderr
+++ b/tests/ui/check-cfg/diagnotics.rustc.stderr
@@ -19,9 +19,8 @@ LL | #[cfg(featur = "foo")]
    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
 help: there is a config with a similar name and value
    |
-LL - #[cfg(featur = "foo")]
-LL + #[cfg(feature = "foo")]
-   |
+LL | #[cfg(feature = "foo")]
+   |             +
 
 warning: unexpected `cfg` condition name: `featur`
   --> $DIR/diagnotics.rs:17:7
diff --git a/tests/ui/closures/2229_closure_analysis/bad-pattern.stderr b/tests/ui/closures/2229_closure_analysis/bad-pattern.stderr
index f5cbecc5704..ced582c9ff5 100644
--- a/tests/ui/closures/2229_closure_analysis/bad-pattern.stderr
+++ b/tests/ui/closures/2229_closure_analysis/bad-pattern.stderr
@@ -108,9 +108,8 @@ LL |         let PAT = v1;
    = note: the matched value is of type `u32`
 help: introduce a variable instead
    |
-LL -         let PAT = v1;
-LL +         let PAT_var = v1;
-   |
+LL |         let PAT_var = v1;
+   |                ++++
 
 error: aborting due to 7 previous errors
 
diff --git a/tests/ui/closures/2229_closure_analysis/issue-118144.stderr b/tests/ui/closures/2229_closure_analysis/issue-118144.stderr
index f717343122e..bfe4afc4b58 100644
--- a/tests/ui/closures/2229_closure_analysis/issue-118144.stderr
+++ b/tests/ui/closures/2229_closure_analysis/issue-118144.stderr
@@ -8,9 +8,8 @@ LL |         V(x) = func_arg;
    |
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -         V(x) = func_arg;
-LL +         V(x) = &*func_arg;
-   |
+LL |         V(x) = &*func_arg;
+   |                ++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/closures/issue-78720.stderr b/tests/ui/closures/issue-78720.stderr
index acce1dc191a..90672cd83d7 100644
--- a/tests/ui/closures/issue-78720.stderr
+++ b/tests/ui/closures/issue-78720.stderr
@@ -15,9 +15,8 @@ LL |     _func: F,
    |
 help: a trait with a similar name exists
    |
-LL -     _func: F,
-LL +     _func: Fn,
-   |
+LL |     _func: Fn,
+   |             +
 help: you might be missing a type parameter
    |
 LL | struct Map2<Segment2, F> {
diff --git a/tests/ui/compare-method/bad-self-type.stderr b/tests/ui/compare-method/bad-self-type.stderr
index f662b5a11cb..bc1587883a3 100644
--- a/tests/ui/compare-method/bad-self-type.stderr
+++ b/tests/ui/compare-method/bad-self-type.stderr
@@ -8,9 +8,8 @@ LL |     fn poll(self, _: &mut Context<'_>) -> Poll<()> {
               found signature `fn(MyFuture, &mut Context<'_>) -> Poll<_>`
 help: change the self-receiver type to match the trait
    |
-LL -     fn poll(self, _: &mut Context<'_>) -> Poll<()> {
-LL +     fn poll(self: Pin<&mut MyFuture>, _: &mut Context<'_>) -> Poll<()> {
-   |
+LL |     fn poll(self: Pin<&mut MyFuture>, _: &mut Context<'_>) -> Poll<()> {
+   |                 ++++++++++++++++++++
 
 error[E0053]: method `foo` has an incompatible type for trait
   --> $DIR/bad-self-type.rs:22:18
diff --git a/tests/ui/const-generics/defaults/doesnt_infer.stderr b/tests/ui/const-generics/defaults/doesnt_infer.stderr
index c17f57f36bc..ef39cef70cb 100644
--- a/tests/ui/const-generics/defaults/doesnt_infer.stderr
+++ b/tests/ui/const-generics/defaults/doesnt_infer.stderr
@@ -2,15 +2,13 @@ error[E0284]: type annotations needed for `Foo<_>`
   --> $DIR/doesnt_infer.rs:13:9
    |
 LL |     let foo = Foo::foo();
-   |         ^^^   ---------- type must be known at this point
+   |         ^^^   --- type must be known at this point
    |
-note: required by a const generic parameter in `Foo::<N>::foo`
-  --> $DIR/doesnt_infer.rs:5:6
+note: required by a const generic parameter in `Foo`
+  --> $DIR/doesnt_infer.rs:3:12
    |
-LL | impl<const N: u32> Foo<N> {
-   |      ^^^^^^^^^^^^ required by this const generic parameter in `Foo::<N>::foo`
-LL |     fn foo() -> Self {
-   |        --- required by a bound in this associated function
+LL | struct Foo<const N: u32 = 2>;
+   |            ^^^^^^^^^^^^^^^^ required by this const generic parameter in `Foo`
 help: consider giving `foo` an explicit type, where the value of const parameter `N` is specified
    |
 LL |     let foo: Foo<N> = Foo::foo();
@@ -20,13 +18,15 @@ error[E0284]: type annotations needed for `Foo<_>`
   --> $DIR/doesnt_infer.rs:13:9
    |
 LL |     let foo = Foo::foo();
-   |         ^^^   --- type must be known at this point
+   |         ^^^   ---------- type must be known at this point
    |
-note: required by a const generic parameter in `Foo`
-  --> $DIR/doesnt_infer.rs:3:12
+note: required by a const generic parameter in `Foo::<N>::foo`
+  --> $DIR/doesnt_infer.rs:5:6
    |
-LL | struct Foo<const N: u32 = 2>;
-   |            ^^^^^^^^^^^^^^^^ required by this const generic parameter in `Foo`
+LL | impl<const N: u32> Foo<N> {
+   |      ^^^^^^^^^^^^ required by this const generic parameter in `Foo::<N>::foo`
+LL |     fn foo() -> Self {
+   |        --- required by a bound in this associated function
 help: consider giving `foo` an explicit type, where the value of const parameter `N` is specified
    |
 LL |     let foo: Foo<N> = Foo::foo();
diff --git a/tests/ui/const-generics/ensure_is_evaluatable.stderr b/tests/ui/const-generics/ensure_is_evaluatable.stderr
index 397902846ec..0a03ea49de1 100644
--- a/tests/ui/const-generics/ensure_is_evaluatable.stderr
+++ b/tests/ui/const-generics/ensure_is_evaluatable.stderr
@@ -14,9 +14,8 @@ LL |     [(); N + 1]:,
    |          ^^^^^ required by this bound in `bar`
 help: try adding a `where` bound
    |
-LL -     [(); M + 1]:,
-LL +     [(); M + 1]:, [(); N + 1]:
-   |
+LL |     [(); M + 1]:, [(); N + 1]:
+   |                   ++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/const-generics/fn_with_two_const_inputs.stderr b/tests/ui/const-generics/fn_with_two_const_inputs.stderr
index 147a2c91fd0..7fb79da2d61 100644
--- a/tests/ui/const-generics/fn_with_two_const_inputs.stderr
+++ b/tests/ui/const-generics/fn_with_two_const_inputs.stderr
@@ -14,9 +14,8 @@ LL |     [(); N + 1]:,
    |          ^^^^^ required by this bound in `bar`
 help: try adding a `where` bound
    |
-LL -     [(); both(N + 1, M + 1)]:,
-LL +     [(); both(N + 1, M + 1)]:, [(); N + 1]:
-   |
+LL |     [(); both(N + 1, M + 1)]:, [(); N + 1]:
+   |                                ++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/const-generics/generic_arg_infer/issue-91614.stderr b/tests/ui/const-generics/generic_arg_infer/issue-91614.stderr
index b88fe966b77..b07e1f29d0d 100644
--- a/tests/ui/const-generics/generic_arg_infer/issue-91614.stderr
+++ b/tests/ui/const-generics/generic_arg_infer/issue-91614.stderr
@@ -2,9 +2,9 @@ error[E0284]: type annotations needed for `Mask<_, _>`
   --> $DIR/issue-91614.rs:6:9
    |
 LL |     let y = Mask::<_, _>::splat(false);
-   |         ^   -------------------------- type must be known at this point
+   |         ^   ------------ type must be known at this point
    |
-note: required by a const generic parameter in `Mask::<T, N>::splat`
+note: required by a const generic parameter in `Mask`
   --> $SRC_DIR/core/src/../../portable-simd/crates/core_simd/src/masks.rs:LL:COL
 help: consider giving `y` an explicit type, where the value of const parameter `N` is specified
    |
@@ -15,9 +15,9 @@ error[E0284]: type annotations needed for `Mask<_, _>`
   --> $DIR/issue-91614.rs:6:9
    |
 LL |     let y = Mask::<_, _>::splat(false);
-   |         ^   ------------ type must be known at this point
+   |         ^   -------------------------- type must be known at this point
    |
-note: required by a const generic parameter in `Mask`
+note: required by a const generic parameter in `Mask::<T, N>::splat`
   --> $SRC_DIR/core/src/../../portable-simd/crates/core_simd/src/masks.rs:LL:COL
 help: consider giving `y` an explicit type, where the value of const parameter `N` is specified
    |
diff --git a/tests/ui/const-generics/generic_const_exprs/abstract-const-as-cast-3.stderr b/tests/ui/const-generics/generic_const_exprs/abstract-const-as-cast-3.stderr
index 9cb71ad8a09..8d0b2e91473 100644
--- a/tests/ui/const-generics/generic_const_exprs/abstract-const-as-cast-3.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/abstract-const-as-cast-3.stderr
@@ -16,9 +16,8 @@ LL |     fn assert_impl<T: Trait>() {}
    |                       ^^^^^ required by this bound in `assert_impl`
 help: try adding a `where` bound
    |
-LL -     EvaluatableU128<{N as u128}>:, {
-LL +     EvaluatableU128<{N as u128}>:, [(); { O as u128 } as usize]: {
-   |
+LL |     EvaluatableU128<{N as u128}>:, [(); { O as u128 } as usize]: {
+   |                                    +++++++++++++++++++++++++++++
 
 error[E0308]: mismatched types
   --> $DIR/abstract-const-as-cast-3.rs:17:5
@@ -52,9 +51,8 @@ LL |     fn assert_impl<T: Trait>() {}
    |                       ^^^^^ required by this bound in `assert_impl`
 help: try adding a `where` bound
    |
-LL -     EvaluatableU128<{N as u128}>:, {
-LL +     EvaluatableU128<{N as u128}>:, [(); { O as u128 } as usize]: {
-   |
+LL |     EvaluatableU128<{N as u128}>:, [(); { O as u128 } as usize]: {
+   |                                    +++++++++++++++++++++++++++++
 
 error[E0308]: mismatched types
   --> $DIR/abstract-const-as-cast-3.rs:20:5
@@ -116,9 +114,8 @@ LL |     fn assert_impl<T: Trait>() {}
    |                       ^^^^^ required by this bound in `assert_impl`
 help: try adding a `where` bound
    |
-LL -     EvaluatableU128<{N as _}>:, {
-LL +     EvaluatableU128<{N as _}>:, [(); { O as u128 } as usize]: {
-   |
+LL |     EvaluatableU128<{N as _}>:, [(); { O as u128 } as usize]: {
+   |                                 +++++++++++++++++++++++++++++
 
 error[E0308]: mismatched types
   --> $DIR/abstract-const-as-cast-3.rs:35:5
@@ -152,9 +149,8 @@ LL |     fn assert_impl<T: Trait>() {}
    |                       ^^^^^ required by this bound in `assert_impl`
 help: try adding a `where` bound
    |
-LL -     EvaluatableU128<{N as _}>:, {
-LL +     EvaluatableU128<{N as _}>:, [(); { O as u128 } as usize]: {
-   |
+LL |     EvaluatableU128<{N as _}>:, [(); { O as u128 } as usize]: {
+   |                                 +++++++++++++++++++++++++++++
 
 error[E0308]: mismatched types
   --> $DIR/abstract-const-as-cast-3.rs:38:5
diff --git a/tests/ui/const-generics/generic_const_exprs/assoc_const_unification/doesnt_unify_evaluatable.stderr b/tests/ui/const-generics/generic_const_exprs/assoc_const_unification/doesnt_unify_evaluatable.stderr
index b43ce5eca43..6cf4e881ada 100644
--- a/tests/ui/const-generics/generic_const_exprs/assoc_const_unification/doesnt_unify_evaluatable.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/assoc_const_unification/doesnt_unify_evaluatable.stderr
@@ -6,9 +6,8 @@ LL |     bar::<{ T::ASSOC }>();
    |
 help: try adding a `where` bound
    |
-LL - fn foo<T: Trait, U: Trait>() where [(); U::ASSOC]:, {
-LL + fn foo<T: Trait, U: Trait>() where [(); U::ASSOC]:, [(); { T::ASSOC }]: {
-   |
+LL | fn foo<T: Trait, U: Trait>() where [(); U::ASSOC]:, [(); { T::ASSOC }]: {
+   |                                                     +++++++++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/const-generics/generic_const_exprs/const_kind_expr/issue_114151.stderr b/tests/ui/const-generics/generic_const_exprs/const_kind_expr/issue_114151.stderr
index 86e35e17a07..3c79cbeb730 100644
--- a/tests/ui/const-generics/generic_const_exprs/const_kind_expr/issue_114151.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/const_kind_expr/issue_114151.stderr
@@ -26,9 +26,8 @@ LL |     foo::<_, L>([(); L + 1 + L]);
    |
 help: try adding a `where` bound
    |
-LL -     [(); (L - 1) + 1 + L]:,
-LL +     [(); (L - 1) + 1 + L]:, [(); L + 1 + L]:
-   |
+LL |     [(); (L - 1) + 1 + L]:, [(); L + 1 + L]:
+   |                             ++++++++++++++++
 
 error: unconstrained generic constant
   --> $DIR/issue_114151.rs:17:17
diff --git a/tests/ui/const-generics/generic_const_exprs/const_kind_expr/wf_obligation.stderr b/tests/ui/const-generics/generic_const_exprs/const_kind_expr/wf_obligation.stderr
index c63a79e64ed..af4543e7ef2 100644
--- a/tests/ui/const-generics/generic_const_exprs/const_kind_expr/wf_obligation.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/const_kind_expr/wf_obligation.stderr
@@ -15,9 +15,8 @@ LL |     foo::<_, L>([(); L + 1 + L]);
    |
 help: try adding a `where` bound
    |
-LL -     [(); (L - 1) + 1 + L]:,
-LL +     [(); (L - 1) + 1 + L]:, [(); L + 1 + L]:
-   |
+LL |     [(); (L - 1) + 1 + L]:, [(); L + 1 + L]:
+   |                             ++++++++++++++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/const-generics/generic_const_exprs/expected-type-of-closure-body-to-be-a-closure-or-coroutine-ice-113776.stderr b/tests/ui/const-generics/generic_const_exprs/expected-type-of-closure-body-to-be-a-closure-or-coroutine-ice-113776.stderr
index c63beeac367..b9db7461699 100644
--- a/tests/ui/const-generics/generic_const_exprs/expected-type-of-closure-body-to-be-a-closure-or-coroutine-ice-113776.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/expected-type-of-closure-body-to-be-a-closure-or-coroutine-ice-113776.stderr
@@ -9,9 +9,8 @@ LL |          let f: F = async { 1 };
    |
 help: a trait with a similar name exists
    |
-LL -          let f: F = async { 1 };
-LL +          let f: Fn = async { 1 };
-   |
+LL |          let f: Fn = async { 1 };
+   |                  +
 help: you might be missing a type parameter
    |
 LL | fn f<T, F>(
diff --git a/tests/ui/const-generics/generic_const_exprs/issue-62504.full.stderr b/tests/ui/const-generics/generic_const_exprs/issue-62504.full.stderr
index 3739637c279..6b79b32d13e 100644
--- a/tests/ui/const-generics/generic_const_exprs/issue-62504.full.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/issue-62504.full.stderr
@@ -22,15 +22,13 @@ error[E0284]: type annotations needed for `ArrayHolder<_>`
   --> $DIR/issue-62504.rs:26:9
    |
 LL |     let mut array = ArrayHolder::new();
-   |         ^^^^^^^^^   ------------------ type must be known at this point
+   |         ^^^^^^^^^   ----------- type must be known at this point
    |
-note: required by a const generic parameter in `ArrayHolder::<X>::new`
-  --> $DIR/issue-62504.rs:16:6
+note: required by a const generic parameter in `ArrayHolder`
+  --> $DIR/issue-62504.rs:14:20
    |
-LL | impl<const X: usize> ArrayHolder<X> {
-   |      ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder::<X>::new`
-LL |     pub const fn new() -> Self {
-   |                  --- required by a bound in this associated function
+LL | struct ArrayHolder<const X: usize>([u32; X]);
+   |                    ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder`
 help: consider giving `array` an explicit type, where the value of const parameter `X` is specified
    |
 LL |     let mut array: ArrayHolder<X> = ArrayHolder::new();
@@ -40,13 +38,15 @@ error[E0284]: type annotations needed for `ArrayHolder<_>`
   --> $DIR/issue-62504.rs:26:9
    |
 LL |     let mut array = ArrayHolder::new();
-   |         ^^^^^^^^^   ----------- type must be known at this point
+   |         ^^^^^^^^^   ------------------ type must be known at this point
    |
-note: required by a const generic parameter in `ArrayHolder`
-  --> $DIR/issue-62504.rs:14:20
+note: required by a const generic parameter in `ArrayHolder::<X>::new`
+  --> $DIR/issue-62504.rs:16:6
    |
-LL | struct ArrayHolder<const X: usize>([u32; X]);
-   |                    ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder`
+LL | impl<const X: usize> ArrayHolder<X> {
+   |      ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder::<X>::new`
+LL |     pub const fn new() -> Self {
+   |                  --- required by a bound in this associated function
 help: consider giving `array` an explicit type, where the value of const parameter `X` is specified
    |
 LL |     let mut array: ArrayHolder<X> = ArrayHolder::new();
diff --git a/tests/ui/const-generics/generic_const_exprs/issue-62504.min.stderr b/tests/ui/const-generics/generic_const_exprs/issue-62504.min.stderr
index 8efd433fd1f..c53a6598d34 100644
--- a/tests/ui/const-generics/generic_const_exprs/issue-62504.min.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/issue-62504.min.stderr
@@ -24,15 +24,13 @@ error[E0284]: type annotations needed for `ArrayHolder<_>`
   --> $DIR/issue-62504.rs:26:9
    |
 LL |     let mut array = ArrayHolder::new();
-   |         ^^^^^^^^^   ------------------ type must be known at this point
+   |         ^^^^^^^^^   ----------- type must be known at this point
    |
-note: required by a const generic parameter in `ArrayHolder::<X>::new`
-  --> $DIR/issue-62504.rs:16:6
+note: required by a const generic parameter in `ArrayHolder`
+  --> $DIR/issue-62504.rs:14:20
    |
-LL | impl<const X: usize> ArrayHolder<X> {
-   |      ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder::<X>::new`
-LL |     pub const fn new() -> Self {
-   |                  --- required by a bound in this associated function
+LL | struct ArrayHolder<const X: usize>([u32; X]);
+   |                    ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder`
 help: consider giving `array` an explicit type, where the value of const parameter `X` is specified
    |
 LL |     let mut array: ArrayHolder<X> = ArrayHolder::new();
@@ -42,13 +40,15 @@ error[E0284]: type annotations needed for `ArrayHolder<_>`
   --> $DIR/issue-62504.rs:26:9
    |
 LL |     let mut array = ArrayHolder::new();
-   |         ^^^^^^^^^   ----------- type must be known at this point
+   |         ^^^^^^^^^   ------------------ type must be known at this point
    |
-note: required by a const generic parameter in `ArrayHolder`
-  --> $DIR/issue-62504.rs:14:20
+note: required by a const generic parameter in `ArrayHolder::<X>::new`
+  --> $DIR/issue-62504.rs:16:6
    |
-LL | struct ArrayHolder<const X: usize>([u32; X]);
-   |                    ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder`
+LL | impl<const X: usize> ArrayHolder<X> {
+   |      ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder::<X>::new`
+LL |     pub const fn new() -> Self {
+   |                  --- required by a bound in this associated function
 help: consider giving `array` an explicit type, where the value of const parameter `X` is specified
    |
 LL |     let mut array: ArrayHolder<X> = ArrayHolder::new();
diff --git a/tests/ui/const-generics/generic_const_exprs/issue-80742.stderr b/tests/ui/const-generics/generic_const_exprs/issue-80742.stderr
index d90380396c1..07fd231cb7a 100644
--- a/tests/ui/const-generics/generic_const_exprs/issue-80742.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/issue-80742.stderr
@@ -4,7 +4,7 @@ error: internal compiler error: compiler/rustc_const_eval/src/interpret/operator
 
 Box<dyn Any>
 query stack during panic:
-#0 [eval_to_allocation_raw] const-evaluating + checking `<impl at $DIR/issue-80742.rs:26:1: 28:32>::{constant#0}`
+#0 [eval_to_allocation_raw] const-evaluating + checking `Inline::{constant#0}`
 #1 [eval_to_valtree] evaluating type-level constant
 ... and 2 other queries... use `env RUST_BACKTRACE=1` to see the full query stack
 error: aborting due to 1 previous error
diff --git a/tests/ui/consts/const-needs_drop-monomorphic.stderr b/tests/ui/consts/const-needs_drop-monomorphic.stderr
index 446d34810c5..17f197cdd5d 100644
--- a/tests/ui/consts/const-needs_drop-monomorphic.stderr
+++ b/tests/ui/consts/const-needs_drop-monomorphic.stderr
@@ -1,12 +1,3 @@
-error[E0599]: no function or associated item named `assert` found for struct `Bool<{ std::mem::needs_drop::<T>() }>` in the current scope
-  --> $DIR/const-needs_drop-monomorphic.rs:11:46
-   |
-LL | struct Bool<const B: bool> {}
-   | -------------------------- function or associated item `assert` not found for this struct
-...
-LL |     Bool::<{ std::mem::needs_drop::<T>() }>::assert();
-   |                                              ^^^^^^ function or associated item cannot be called on `Bool<{ std::mem::needs_drop::<T>() }>` due to unsatisfied trait bounds
-
 error: unconstrained generic constant
   --> $DIR/const-needs_drop-monomorphic.rs:11:5
    |
@@ -18,6 +9,15 @@ help: try adding a `where` bound
 LL | fn f<T>() where [(); { std::mem::needs_drop::<T>() } as usize]: {
    |           +++++++++++++++++++++++++++++++++++++++++++++++++++++
 
+error[E0599]: no function or associated item named `assert` found for struct `Bool<{ std::mem::needs_drop::<T>() }>` in the current scope
+  --> $DIR/const-needs_drop-monomorphic.rs:11:46
+   |
+LL | struct Bool<const B: bool> {}
+   | -------------------------- function or associated item `assert` not found for this struct
+...
+LL |     Bool::<{ std::mem::needs_drop::<T>() }>::assert();
+   |                                              ^^^^^^ function or associated item cannot be called on `Bool<{ std::mem::needs_drop::<T>() }>` due to unsatisfied trait bounds
+
 error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0599`.
diff --git a/tests/ui/consts/const-pattern-irrefutable.stderr b/tests/ui/consts/const-pattern-irrefutable.stderr
index a97e35e385f..06bd01bff79 100644
--- a/tests/ui/consts/const-pattern-irrefutable.stderr
+++ b/tests/ui/consts/const-pattern-irrefutable.stderr
@@ -12,9 +12,8 @@ LL |     let a = 4;
    = note: the matched value is of type `u8`
 help: introduce a variable instead
    |
-LL -     let a = 4;
-LL +     let a_var = 4;
-   |
+LL |     let a_var = 4;
+   |          ++++
 
 error[E0005]: refutable pattern in local binding
   --> $DIR/const-pattern-irrefutable.rs:28:9
@@ -48,9 +47,8 @@ LL |     let d = (4, 4);
    = note: the matched value is of type `(u8, u8)`
 help: introduce a variable instead
    |
-LL -     let d = (4, 4);
-LL +     let d_var = (4, 4);
-   |
+LL |     let d_var = (4, 4);
+   |          ++++
 
 error[E0005]: refutable pattern in local binding
   --> $DIR/const-pattern-irrefutable.rs:36:9
@@ -71,9 +69,8 @@ LL | struct S {
    = note: the matched value is of type `S`
 help: introduce a variable instead
    |
-LL -     let e = S {
-LL +     let e_var = S {
-   |
+LL |     let e_var = S {
+   |          ++++
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/delegation/correct_body_owner_parent_found_in_diagnostics.stderr b/tests/ui/delegation/correct_body_owner_parent_found_in_diagnostics.stderr
index 2ce3b388073..61e2a8f64dd 100644
--- a/tests/ui/delegation/correct_body_owner_parent_found_in_diagnostics.stderr
+++ b/tests/ui/delegation/correct_body_owner_parent_found_in_diagnostics.stderr
@@ -52,6 +52,14 @@ LL | pub struct InvariantRef<'a, T: ?Sized>(&'a T, PhantomData<&'a mut &'a T>);
 LL |     pub const NEW: Self = InvariantRef::new(&());
    |                                         ^^^ function or associated item not found in `InvariantRef<'_, _>`
 
+error[E0277]: the trait bound `u8: Trait` is not satisfied
+  --> $DIR/correct_body_owner_parent_found_in_diagnostics.rs:22:12
+   |
+LL |     reuse <u8 as Trait>::{foo, bar, meh} { &const { InvariantRef::<'a>::NEW } }
+   |            ^^ the trait `Trait` is not implemented for `u8`
+   |
+   = help: the trait `Trait` is implemented for `Z`
+
 error[E0308]: mismatched types
   --> $DIR/correct_body_owner_parent_found_in_diagnostics.rs:22:53
    |
@@ -68,6 +76,7 @@ LL |     reuse <u8 as Trait>::{foo, bar, meh} { &const { InvariantRef::<'a>::NEW
    |            ^^ the trait `Trait` is not implemented for `u8`
    |
    = help: the trait `Trait` is implemented for `Z`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0308]: mismatched types
   --> $DIR/correct_body_owner_parent_found_in_diagnostics.rs:22:53
@@ -98,15 +107,6 @@ LL |     reuse <u8 as Trait>::{foo, bar, meh} { &const { InvariantRef::<'a>::NEW
             found struct `InvariantRef<'_, ()>`
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
-error[E0277]: the trait bound `u8: Trait` is not satisfied
-  --> $DIR/correct_body_owner_parent_found_in_diagnostics.rs:22:12
-   |
-LL |     reuse <u8 as Trait>::{foo, bar, meh} { &const { InvariantRef::<'a>::NEW } }
-   |            ^^ the trait `Trait` is not implemented for `u8`
-   |
-   = help: the trait `Trait` is implemented for `Z`
-   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
-
 error: aborting due to 10 previous errors
 
 Some errors have detailed explanations: E0261, E0277, E0308, E0599.
diff --git a/tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr b/tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr
index 72b65006a3f..411eec84963 100644
--- a/tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr
+++ b/tests/ui/did_you_mean/dont-suggest-hygienic-fields.stderr
@@ -10,9 +10,8 @@ LL |     const CRATE: Crate = Crate { fiel: () };
    = note: this error originates in the macro `environment` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: a field with a similar name exists
    |
-LL -     const CRATE: Crate = Crate { fiel: () };
-LL +     const CRATE: Crate = Crate { field: () };
-   |
+LL |     const CRATE: Crate = Crate { field: () };
+   |                                      +
 
 error[E0609]: no field `field` on type `Compound`
   --> $DIR/dont-suggest-hygienic-fields.rs:24:16
diff --git a/tests/ui/dropck/explicit-drop-bounds.bad1.stderr b/tests/ui/dropck/explicit-drop-bounds.bad1.stderr
index 650244ac02a..12d7f5b6cd3 100644
--- a/tests/ui/dropck/explicit-drop-bounds.bad1.stderr
+++ b/tests/ui/dropck/explicit-drop-bounds.bad1.stderr
@@ -11,9 +11,8 @@ LL | struct DropMe<T: Copy>(T);
    |                  ^^^^ required by this bound in `DropMe`
 help: consider further restricting type parameter `T` with trait `Copy`
    |
-LL -     [T; 1]: Copy, // But `[T; 1]: Copy` does not imply `T: Copy`
-LL +     [T; 1]: Copy, T: std::marker::Copy // But `[T; 1]: Copy` does not imply `T: Copy`
-   |
+LL |     [T; 1]: Copy, T: std::marker::Copy // But `[T; 1]: Copy` does not imply `T: Copy`
+   |                   ++++++++++++++++++++
 
 error[E0277]: the trait bound `T: Copy` is not satisfied
   --> $DIR/explicit-drop-bounds.rs:32:18
@@ -28,9 +27,8 @@ LL | struct DropMe<T: Copy>(T);
    |                  ^^^^ required by this bound in `DropMe`
 help: consider further restricting type parameter `T` with trait `Copy`
    |
-LL -     [T; 1]: Copy, // But `[T; 1]: Copy` does not imply `T: Copy`
-LL +     [T; 1]: Copy, T: std::marker::Copy // But `[T; 1]: Copy` does not imply `T: Copy`
-   |
+LL |     [T; 1]: Copy, T: std::marker::Copy // But `[T; 1]: Copy` does not imply `T: Copy`
+   |                   ++++++++++++++++++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/dst/issue-90528-unsizing-suggestion-3.stderr b/tests/ui/dst/issue-90528-unsizing-suggestion-3.stderr
index c54cc858129..db749436855 100644
--- a/tests/ui/dst/issue-90528-unsizing-suggestion-3.stderr
+++ b/tests/ui/dst/issue-90528-unsizing-suggestion-3.stderr
@@ -67,9 +67,8 @@ LL | fn wants_write(_: impl Write) {}
    |                        ^^^^^ required by this bound in `wants_write`
 help: consider changing this borrow's mutability
    |
-LL -     wants_write(&[0u8][..]);
-LL +     wants_write(&mut [0u8][..]);
-   |
+LL |     wants_write(&mut [0u8][..]);
+   |                  +++
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/dyn-compatibility/assoc_type_bounds_sized_used.stderr b/tests/ui/dyn-compatibility/assoc_type_bounds_sized_used.stderr
index b67a1244ece..7b152adea49 100644
--- a/tests/ui/dyn-compatibility/assoc_type_bounds_sized_used.stderr
+++ b/tests/ui/dyn-compatibility/assoc_type_bounds_sized_used.stderr
@@ -1,17 +1,3 @@
-error[E0599]: the function or associated item `default` exists for associated type `<T as Bop>::Bar`, but its trait bounds were not satisfied
-  --> $DIR/assoc_type_bounds_sized_used.rs:11:30
-   |
-LL |     let _ = <T as Bop>::Bar::default();
-   |                              ^^^^^^^ function or associated item cannot be called on `<T as Bop>::Bar` due to unsatisfied trait bounds
-   |
-   = note: the following trait bounds were not satisfied:
-           `T: Sized`
-           which is required by `<T as Bop>::Bar: Default`
-help: consider restricting the type parameter to satisfy the trait bound
-   |
-LL | fn bop<T: Bop + ?Sized>() where T: Sized {
-   |                           ++++++++++++++
-
 error[E0277]: the size for values of type `T` cannot be known at compilation time
   --> $DIR/assoc_type_bounds_sized_used.rs:11:14
    |
@@ -38,6 +24,20 @@ help: consider relaxing the implicit `Sized` restriction
 LL |     type Bar: Default + ?Sized
    |                       ++++++++
 
+error[E0599]: the function or associated item `default` exists for associated type `<T as Bop>::Bar`, but its trait bounds were not satisfied
+  --> $DIR/assoc_type_bounds_sized_used.rs:11:30
+   |
+LL |     let _ = <T as Bop>::Bar::default();
+   |                              ^^^^^^^ function or associated item cannot be called on `<T as Bop>::Bar` due to unsatisfied trait bounds
+   |
+   = note: the following trait bounds were not satisfied:
+           `T: Sized`
+           which is required by `<T as Bop>::Bar: Default`
+help: consider restricting the type parameter to satisfy the trait bound
+   |
+LL | fn bop<T: Bop + ?Sized>() where T: Sized {
+   |                           ++++++++++++++
+
 error: aborting due to 2 previous errors
 
 Some errors have detailed explanations: E0277, E0599.
diff --git a/tests/ui/empty/empty-struct-braces-expr.stderr b/tests/ui/empty/empty-struct-braces-expr.stderr
index 3411702a12d..8ec8ecf46bf 100644
--- a/tests/ui/empty/empty-struct-braces-expr.stderr
+++ b/tests/ui/empty/empty-struct-braces-expr.stderr
@@ -14,9 +14,8 @@ LL | pub struct XEmpty2;
    |
 help: use struct literal syntax instead
    |
-LL -     let e1 = Empty1;
-LL +     let e1 = Empty1 {};
-   |
+LL |     let e1 = Empty1 {};
+   |                     ++
 help: a unit struct with a similar name exists
    |
 LL -     let e1 = Empty1;
@@ -38,9 +37,8 @@ LL | pub struct XEmpty2;
    |
 help: use struct literal syntax instead
    |
-LL -     let xe1 = XEmpty1;
-LL +     let xe1 = XEmpty1 {};
-   |
+LL |     let xe1 = XEmpty1 {};
+   |                       ++
 help: a unit struct with a similar name exists
    |
 LL -     let xe1 = XEmpty1;
@@ -127,9 +125,8 @@ LL |     let xe3 = XE::Empty3;
    |
 help: there is a variant with a similar name
    |
-LL -     let xe3 = XE::Empty3;
-LL +     let xe3 = XE::XEmpty3;
-   |
+LL |     let xe3 = XE::XEmpty3;
+   |                   +
 
 error[E0599]: no variant or associated item named `Empty3` found for enum `empty_struct::XE` in the current scope
   --> $DIR/empty-struct-braces-expr.rs:26:19
diff --git a/tests/ui/empty/empty-struct-tuple-pat.stderr b/tests/ui/empty/empty-struct-tuple-pat.stderr
index 3906a0e2060..09b454653f6 100644
--- a/tests/ui/empty/empty-struct-tuple-pat.stderr
+++ b/tests/ui/empty/empty-struct-tuple-pat.stderr
@@ -46,9 +46,8 @@ LL |     XEmpty5(),
    |
 help: use the tuple variant pattern syntax instead
    |
-LL -         XE::XEmpty5 => (),
-LL +         XE::XEmpty5() => (),
-   |
+LL |         XE::XEmpty5() => (),
+   |                    ++
 help: a unit variant with a similar name exists
    |
 LL -         XE::XEmpty5 => (),
diff --git a/tests/ui/env-macro/error-recovery-issue-55897.stderr b/tests/ui/env-macro/error-recovery-issue-55897.stderr
index cda9aa330d2..f1cacf5420e 100644
--- a/tests/ui/env-macro/error-recovery-issue-55897.stderr
+++ b/tests/ui/env-macro/error-recovery-issue-55897.stderr
@@ -30,9 +30,8 @@ LL |     use env;
    |
 help: consider importing this module instead
    |
-LL -     use env;
-LL +     use std::env;
-   |
+LL |     use std::env;
+   |         +++++
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/error-codes/E0027.stderr b/tests/ui/error-codes/E0027.stderr
index 701e636dc58..3a1ebf29719 100644
--- a/tests/ui/error-codes/E0027.stderr
+++ b/tests/ui/error-codes/E0027.stderr
@@ -6,19 +6,16 @@ LL |         Dog { age: x } => {}
    |
 help: include the missing field in the pattern
    |
-LL -         Dog { age: x } => {}
-LL +         Dog { age: x, name } => {}
-   |
+LL |         Dog { age: x, name } => {}
+   |                     ++++++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -         Dog { age: x } => {}
-LL +         Dog { age: x, name: _ } => {}
-   |
+LL |         Dog { age: x, name: _ } => {}
+   |                     +++++++++
 help: or always ignore missing fields here
    |
-LL -         Dog { age: x } => {}
-LL +         Dog { age: x, .. } => {}
-   |
+LL |         Dog { age: x, .. } => {}
+   |                     ++++
 
 error[E0027]: pattern does not mention field `age`
   --> $DIR/E0027.rs:15:9
diff --git a/tests/ui/extern/not-in-block.stderr b/tests/ui/extern/not-in-block.stderr
index f35d98e9948..e35c50343fc 100644
--- a/tests/ui/extern/not-in-block.stderr
+++ b/tests/ui/extern/not-in-block.stderr
@@ -11,9 +11,8 @@ LL + extern fn none_fn(x: bool) -> i32 { <body> }
    |
 help: if you meant to declare an externally defined function, use an `extern` block
    |
-LL - extern fn none_fn(x: bool) -> i32;
-LL + extern { fn none_fn(x: bool) -> i32; }
-   |
+LL | extern { fn none_fn(x: bool) -> i32; }
+   |        +                             +
 
 error: free function without a body
   --> $DIR/not-in-block.rs:6:1
@@ -28,9 +27,8 @@ LL + extern "C" fn c_fn(x: bool) -> i32 { <body> }
    |
 help: if you meant to declare an externally defined function, use an `extern` block
    |
-LL - extern "C" fn c_fn(x: bool) -> i32;
-LL + extern "C" { fn c_fn(x: bool) -> i32; }
-   |
+LL | extern "C" { fn c_fn(x: bool) -> i32; }
+   |            +                          +
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr b/tests/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr
index 7271ca48877..214725b77c0 100644
--- a/tests/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr
+++ b/tests/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr
@@ -95,9 +95,8 @@ LL |     extern "rust-call" fn call(self, args: ()) -> () {}
               found signature `extern "rust-call" fn(Foo, ()) -> ()`
 help: change the self-receiver type to match the trait
    |
-LL -     extern "rust-call" fn call(self, args: ()) -> () {}
-LL +     extern "rust-call" fn call(&self, args: ()) -> () {}
-   |
+LL |     extern "rust-call" fn call(&self, args: ()) -> () {}
+   |                                +
 
 error[E0183]: manual implementations of `FnOnce` are experimental
   --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
diff --git a/tests/ui/fmt/no-inline-literals-out-of-range.stderr b/tests/ui/fmt/no-inline-literals-out-of-range.stderr
index 78047eabf49..e1702388704 100644
--- a/tests/ui/fmt/no-inline-literals-out-of-range.stderr
+++ b/tests/ui/fmt/no-inline-literals-out-of-range.stderr
@@ -51,9 +51,8 @@ LL |     format_args!("{}", 0xffff_ffff); // treat unsuffixed literals as i32
    = help: consider using the type `u32` instead
 help: to use as a negative number (decimal `-1`), consider using the type `u32` for the literal and cast it to `i32`
    |
-LL -     format_args!("{}", 0xffff_ffff); // treat unsuffixed literals as i32
-LL +     format_args!("{}", 0xffff_ffffu32 as i32); // treat unsuffixed literals as i32
-   |
+LL |     format_args!("{}", 0xffff_ffffu32 as i32); // treat unsuffixed literals as i32
+   |                                   ++++++++++
 
 error: aborting due to 5 previous errors
 
diff --git a/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.next.stderr b/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.next.stderr
index 3c24eb9adbe..ce64a022214 100644
--- a/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.next.stderr
+++ b/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.next.stderr
@@ -23,7 +23,19 @@ error[E0271]: type mismatch resolving `<Y as X>::LineStreamFut<'a, Repr> == ()`
 LL |     fn line_stream<'a, Repr>(&'a self) -> Self::LineStreamFut<'a, Repr> {}
    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ types differ
 
-error: aborting due to 3 previous errors
+error[E0271]: type mismatch resolving `<Y as X>::LineStreamFut<'a, Repr> normalizes-to _`
+  --> $DIR/ice-unexpected-param-type-whensubstituting-in-region-112823.rs:28:73
+   |
+LL |     fn line_stream<'a, Repr>(&'a self) -> Self::LineStreamFut<'a, Repr> {}
+   |                                                                         ^^ types differ
+
+error[E0271]: type mismatch resolving `<Y as X>::LineStreamFut<'a, Repr> normalizes-to _`
+  --> $DIR/ice-unexpected-param-type-whensubstituting-in-region-112823.rs:28:5
+   |
+LL |     fn line_stream<'a, Repr>(&'a self) -> Self::LineStreamFut<'a, Repr> {}
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ types differ
+
+error: aborting due to 5 previous errors
 
 Some errors have detailed explanations: E0049, E0271, E0407.
 For more information about an error, try `rustc --explain E0049`.
diff --git a/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.rs b/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.rs
index c97bd179943..cb32723b22d 100644
--- a/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.rs
+++ b/tests/ui/impl-trait/ice-unexpected-param-type-whensubstituting-in-region-112823.rs
@@ -26,9 +26,11 @@ impl X for Y {
     //~^ ERROR type `LineStream` has 0 type parameters but its trait declaration has 1 type parameter
     type LineStreamFut<'a, Repr> = impl Future<Output = Self::LineStream<'a, Repr>>;
     fn line_stream<'a, Repr>(&'a self) -> Self::LineStreamFut<'a, Repr> {}
-    //[current]~^ ERROR `()` is not a future
-    //[next]~^^ ERROR type mismatch resolving `<Y as X>::LineStreamFut<'a, Repr> == ()`
-    //~^^^ method `line_stream` is not a member of trait `X`
+    //~^ method `line_stream` is not a member of trait `X`
+    //[current]~^^ ERROR `()` is not a future
+    //[next]~^^^ ERROR type mismatch resolving `<Y as X>::LineStreamFut<'a, Repr> == ()`
+    //[next]~| ERROR type mismatch resolving `<Y as X>::LineStreamFut<'a, Repr> normalizes-to _`
+    //[next]~| ERROR type mismatch resolving `<Y as X>::LineStreamFut<'a, Repr> normalizes-to _`
 }
 
 pub fn main() {}
diff --git a/tests/ui/impl-trait/issues/issue-62742.stderr b/tests/ui/impl-trait/issues/issue-62742.stderr
index 98d17b02536..ee4eb98f4ea 100644
--- a/tests/ui/impl-trait/issues/issue-62742.stderr
+++ b/tests/ui/impl-trait/issues/issue-62742.stderr
@@ -1,3 +1,17 @@
+error[E0277]: the trait bound `RawImpl<_>: Raw<_>` is not satisfied
+  --> $DIR/issue-62742.rs:4:5
+   |
+LL |     WrongImpl::foo(0i32);
+   |     ^^^^^^^^^ the trait `Raw<_>` is not implemented for `RawImpl<_>`
+   |
+   = help: the trait `Raw<_>` is not implemented for `RawImpl<_>`
+           but trait `Raw<[_]>` is implemented for it
+note: required by a bound in `SafeImpl`
+  --> $DIR/issue-62742.rs:33:35
+   |
+LL | pub struct SafeImpl<T: ?Sized, A: Raw<T>>(PhantomData<(A, T)>);
+   |                                   ^^^^^^ required by this bound in `SafeImpl`
+
 error[E0599]: the function or associated item `foo` exists for struct `SafeImpl<_, RawImpl<_>>`, but its trait bounds were not satisfied
   --> $DIR/issue-62742.rs:4:16
    |
@@ -23,14 +37,15 @@ note: the trait `Raw` must be implemented
 LL | pub trait Raw<T: ?Sized> {
    | ^^^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0277]: the trait bound `RawImpl<_>: Raw<_>` is not satisfied
-  --> $DIR/issue-62742.rs:4:5
+error[E0277]: the trait bound `RawImpl<()>: Raw<()>` is not satisfied
+  --> $DIR/issue-62742.rs:10:5
    |
-LL |     WrongImpl::foo(0i32);
-   |     ^^^^^^^^^ the trait `Raw<_>` is not implemented for `RawImpl<_>`
+LL |     WrongImpl::<()>::foo(0i32);
+   |     ^^^^^^^^^^^^^^^ the trait `Raw<()>` is not implemented for `RawImpl<()>`
    |
-   = help: the trait `Raw<_>` is not implemented for `RawImpl<_>`
-           but trait `Raw<[_]>` is implemented for it
+   = help: the trait `Raw<()>` is not implemented for `RawImpl<()>`
+           but trait `Raw<[()]>` is implemented for it
+   = help: for that trait implementation, expected `[()]`, found `()`
 note: required by a bound in `SafeImpl`
   --> $DIR/issue-62742.rs:33:35
    |
@@ -62,21 +77,6 @@ note: the trait `Raw` must be implemented
 LL | pub trait Raw<T: ?Sized> {
    | ^^^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0277]: the trait bound `RawImpl<()>: Raw<()>` is not satisfied
-  --> $DIR/issue-62742.rs:10:5
-   |
-LL |     WrongImpl::<()>::foo(0i32);
-   |     ^^^^^^^^^^^^^^^ the trait `Raw<()>` is not implemented for `RawImpl<()>`
-   |
-   = help: the trait `Raw<()>` is not implemented for `RawImpl<()>`
-           but trait `Raw<[()]>` is implemented for it
-   = help: for that trait implementation, expected `[()]`, found `()`
-note: required by a bound in `SafeImpl`
-  --> $DIR/issue-62742.rs:33:35
-   |
-LL | pub struct SafeImpl<T: ?Sized, A: Raw<T>>(PhantomData<(A, T)>);
-   |                                   ^^^^^^ required by this bound in `SafeImpl`
-
 error: aborting due to 4 previous errors
 
 Some errors have detailed explanations: E0277, E0599.
diff --git a/tests/ui/impl-trait/no-method-suggested-traits.stderr b/tests/ui/impl-trait/no-method-suggested-traits.stderr
index af6d492c74d..0a974668188 100644
--- a/tests/ui/impl-trait/no-method-suggested-traits.stderr
+++ b/tests/ui/impl-trait/no-method-suggested-traits.stderr
@@ -17,9 +17,8 @@ LL + use no_method_suggested_traits::qux::PrivPub;
    |
 help: there is a method `method2` with a similar name
    |
-LL -     1u32.method();
-LL +     1u32.method2();
-   |
+LL |     1u32.method2();
+   |                +
 
 error[E0599]: no method named `method` found for struct `Rc<&mut Box<&u32>>` in the current scope
   --> $DIR/no-method-suggested-traits.rs:26:44
@@ -40,9 +39,8 @@ LL + use no_method_suggested_traits::qux::PrivPub;
    |
 help: there is a method `method2` with a similar name
    |
-LL -     std::rc::Rc::new(&mut Box::new(&1u32)).method();
-LL +     std::rc::Rc::new(&mut Box::new(&1u32)).method2();
-   |
+LL |     std::rc::Rc::new(&mut Box::new(&1u32)).method2();
+   |                                                  +
 
 error[E0599]: no method named `method` found for type `char` in the current scope
   --> $DIR/no-method-suggested-traits.rs:30:9
@@ -60,9 +58,8 @@ LL + use foo::Bar;
    |
 help: there is a method `method2` with a similar name
    |
-LL -     'a'.method();
-LL +     'a'.method2();
-   |
+LL |     'a'.method2();
+   |               +
 
 error[E0599]: no method named `method` found for struct `Rc<&mut Box<&char>>` in the current scope
   --> $DIR/no-method-suggested-traits.rs:32:43
@@ -77,9 +74,8 @@ LL + use foo::Bar;
    |
 help: there is a method `method2` with a similar name
    |
-LL -     std::rc::Rc::new(&mut Box::new(&'a')).method();
-LL +     std::rc::Rc::new(&mut Box::new(&'a')).method2();
-   |
+LL |     std::rc::Rc::new(&mut Box::new(&'a')).method2();
+   |                                                 +
 
 error[E0599]: no method named `method` found for type `i32` in the current scope
   --> $DIR/no-method-suggested-traits.rs:35:10
@@ -99,9 +95,8 @@ LL + use no_method_suggested_traits::foo::PubPub;
    |
 help: there is a method `method3` with a similar name
    |
-LL -     1i32.method();
-LL +     1i32.method3();
-   |
+LL |     1i32.method3();
+   |                +
 
 error[E0599]: no method named `method` found for struct `Rc<&mut Box<&i32>>` in the current scope
   --> $DIR/no-method-suggested-traits.rs:37:44
@@ -116,9 +111,8 @@ LL + use no_method_suggested_traits::foo::PubPub;
    |
 help: there is a method `method3` with a similar name
    |
-LL -     std::rc::Rc::new(&mut Box::new(&1i32)).method();
-LL +     std::rc::Rc::new(&mut Box::new(&1i32)).method3();
-   |
+LL |     std::rc::Rc::new(&mut Box::new(&1i32)).method3();
+   |                                                  +
 
 error[E0599]: no method named `method` found for struct `Foo` in the current scope
   --> $DIR/no-method-suggested-traits.rs:40:9
diff --git a/tests/ui/imports/glob-resolve1.stderr b/tests/ui/imports/glob-resolve1.stderr
index 6a48e36d378..75e65681c3a 100644
--- a/tests/ui/imports/glob-resolve1.stderr
+++ b/tests/ui/imports/glob-resolve1.stderr
@@ -37,9 +37,8 @@ LL | |     }
    | |_____^
 help: you might have meant to use the following enum variant
    |
-LL -     B;
-LL +     B::B1;
-   |
+LL |     B::B1;
+   |      ++++
 
 error[E0425]: cannot find value `C` in this scope
   --> $DIR/glob-resolve1.rs:29:5
diff --git a/tests/ui/imports/issue-45829/import-self.stderr b/tests/ui/imports/issue-45829/import-self.stderr
index 62bc559b778..b392d93c154 100644
--- a/tests/ui/imports/issue-45829/import-self.stderr
+++ b/tests/ui/imports/issue-45829/import-self.stderr
@@ -32,9 +32,8 @@ LL | use foo::{self};
    = note: `foo` must be defined only once in the type namespace of this module
 help: you can use `as` to change the binding name of the import
    |
-LL - use foo::{self};
-LL + use foo::{self as other_foo};
-   |
+LL | use foo::{self as other_foo};
+   |                ++++++++++++
 
 error[E0255]: the name `foo` is defined multiple times
   --> $DIR/import-self.rs:12:5
diff --git a/tests/ui/imports/suggest-import-issue-120074.edition2015.stderr b/tests/ui/imports/suggest-import-issue-120074.edition2015.stderr
index c9cfe769aeb..10b8db62edc 100644
--- a/tests/ui/imports/suggest-import-issue-120074.edition2015.stderr
+++ b/tests/ui/imports/suggest-import-issue-120074.edition2015.stderr
@@ -6,9 +6,8 @@ LL |     println!("Hello, {}!", crate::bar::do_the_thing);
    |
 help: a similar path exists
    |
-LL -     println!("Hello, {}!", crate::bar::do_the_thing);
-LL +     println!("Hello, {}!", crate::foo::bar::do_the_thing);
-   |
+LL |     println!("Hello, {}!", crate::foo::bar::do_the_thing);
+   |                                   +++++
 help: consider importing this module
    |
 LL + use foo::bar;
diff --git a/tests/ui/imports/suggest-import-issue-120074.edition2021.stderr b/tests/ui/imports/suggest-import-issue-120074.edition2021.stderr
index c9cfe769aeb..10b8db62edc 100644
--- a/tests/ui/imports/suggest-import-issue-120074.edition2021.stderr
+++ b/tests/ui/imports/suggest-import-issue-120074.edition2021.stderr
@@ -6,9 +6,8 @@ LL |     println!("Hello, {}!", crate::bar::do_the_thing);
    |
 help: a similar path exists
    |
-LL -     println!("Hello, {}!", crate::bar::do_the_thing);
-LL +     println!("Hello, {}!", crate::foo::bar::do_the_thing);
-   |
+LL |     println!("Hello, {}!", crate::foo::bar::do_the_thing);
+   |                                   +++++
 help: consider importing this module
    |
 LL + use foo::bar;
diff --git a/tests/ui/inference/need_type_info/type-alias.stderr b/tests/ui/inference/need_type_info/type-alias.stderr
index 2c39a3f5646..47393557828 100644
--- a/tests/ui/inference/need_type_info/type-alias.stderr
+++ b/tests/ui/inference/need_type_info/type-alias.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed
   --> $DIR/type-alias.rs:12:5
    |
 LL |     DirectAlias::new()
-   |     ^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T`
+   |     ^^^^^^^^^^^ cannot infer type for type parameter `T` declared on the type alias `DirectAlias`
 
 error[E0282]: type annotations needed
   --> $DIR/type-alias.rs:18:5
@@ -14,7 +14,7 @@ error[E0282]: type annotations needed
   --> $DIR/type-alias.rs:32:5
    |
 LL |     DirectButWithDefaultAlias::new();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T` declared on the type alias `DirectButWithDefaultAlias`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/issues/issue-32004.stderr b/tests/ui/issues/issue-32004.stderr
index 88395cd8520..fcbec97661b 100644
--- a/tests/ui/issues/issue-32004.stderr
+++ b/tests/ui/issues/issue-32004.stderr
@@ -11,9 +11,8 @@ LL |         Foo::Bar => {}
    |
 help: use the tuple variant pattern syntax instead
    |
-LL -         Foo::Bar => {}
-LL +         Foo::Bar(_) => {}
-   |
+LL |         Foo::Bar(_) => {}
+   |                 +++
 help: a unit variant with a similar name exists
    |
 LL -         Foo::Bar => {}
diff --git a/tests/ui/issues/issue-41652/issue-41652.stderr b/tests/ui/issues/issue-41652/issue-41652.stderr
index c8299f28d34..4a81e76af75 100644
--- a/tests/ui/issues/issue-41652/issue-41652.stderr
+++ b/tests/ui/issues/issue-41652/issue-41652.stderr
@@ -6,9 +6,8 @@ LL |         3.f()
    |
 help: you must specify a concrete type for this numeric value, like `i32`
    |
-LL -         3.f()
-LL +         3_i32.f()
-   |
+LL |         3_i32.f()
+   |          ++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-51874.stderr b/tests/ui/issues/issue-51874.stderr
index 18328450145..5c9331b4e1e 100644
--- a/tests/ui/issues/issue-51874.stderr
+++ b/tests/ui/issues/issue-51874.stderr
@@ -6,9 +6,8 @@ LL |     let a = (1.0).pow(1.0);
    |
 help: you must specify a concrete type for this numeric value, like `f32`
    |
-LL -     let a = (1.0).pow(1.0);
-LL +     let a = (1.0_f32).pow(1.0);
-   |
+LL |     let a = (1.0_f32).pow(1.0);
+   |                 ++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-5358-1.stderr b/tests/ui/issues/issue-5358-1.stderr
index f598cf33911..e68db865dc4 100644
--- a/tests/ui/issues/issue-5358-1.stderr
+++ b/tests/ui/issues/issue-5358-1.stderr
@@ -14,9 +14,8 @@ LL |         S(Either::Right(_)) => {}
    |         ++                +
 help: you might have meant to use field `0` whose type is `Either<usize, usize>`
    |
-LL -     match S(Either::Left(5)) {
-LL +     match S(Either::Left(5)).0 {
-   |
+LL |     match S(Either::Left(5)).0 {
+   |                             ++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-56175.stderr b/tests/ui/issues/issue-56175.stderr
index 695aa2ac796..df4cd6ce8a7 100644
--- a/tests/ui/issues/issue-56175.stderr
+++ b/tests/ui/issues/issue-56175.stderr
@@ -16,9 +16,8 @@ LL + use reexported_trait::Trait;
    |
 help: there is a method `trait_method_b` with a similar name
    |
-LL -     reexported_trait::FooStruct.trait_method();
-LL +     reexported_trait::FooStruct.trait_method_b();
-   |
+LL |     reexported_trait::FooStruct.trait_method_b();
+   |                                             ++
 
 error[E0599]: no method named `trait_method_b` found for struct `FooStruct` in the current scope
   --> $DIR/issue-56175.rs:7:33
diff --git a/tests/ui/issues/issue-57741-dereference-boxed-value/issue-57741.stderr b/tests/ui/issues/issue-57741-dereference-boxed-value/issue-57741.stderr
index 713a19f6cb0..62d83a54614 100644
--- a/tests/ui/issues/issue-57741-dereference-boxed-value/issue-57741.stderr
+++ b/tests/ui/issues/issue-57741-dereference-boxed-value/issue-57741.stderr
@@ -10,9 +10,8 @@ LL |         T::A(a) | T::B(a) => a,
                 found enum `T`
 help: consider dereferencing the boxed value
    |
-LL -     let y = match x {
-LL +     let y = match *x {
-   |
+LL |     let y = match *x {
+   |                   +
 
 error[E0308]: mismatched types
   --> $DIR/issue-57741.rs:20:19
@@ -26,9 +25,8 @@ LL |         T::A(a) | T::B(a) => a,
                 found enum `T`
 help: consider dereferencing the boxed value
    |
-LL -     let y = match x {
-LL +     let y = match *x {
-   |
+LL |     let y = match *x {
+   |                   +
 
 error[E0308]: mismatched types
   --> $DIR/issue-57741.rs:27:9
@@ -42,9 +40,8 @@ LL |         S::A { a } | S::B { b: a } => a,
                 found enum `S`
 help: consider dereferencing the boxed value
    |
-LL -     let y = match x {
-LL +     let y = match *x {
-   |
+LL |     let y = match *x {
+   |                   +
 
 error[E0308]: mismatched types
   --> $DIR/issue-57741.rs:27:22
@@ -58,9 +55,8 @@ LL |         S::A { a } | S::B { b: a } => a,
                 found enum `S`
 help: consider dereferencing the boxed value
    |
-LL -     let y = match x {
-LL +     let y = match *x {
-   |
+LL |     let y = match *x {
+   |                   +
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/issues/issue-58734.rs b/tests/ui/issues/issue-58734.rs
index 9b630666baf..ee23be87b6b 100644
--- a/tests/ui/issues/issue-58734.rs
+++ b/tests/ui/issues/issue-58734.rs
@@ -21,4 +21,5 @@ fn main() {
     //~^ ERROR no function or associated item named `nonexistent` found
     //~| WARN trait objects without an explicit `dyn` are deprecated
     //~| WARN this is accepted in the current edition
+    //~| ERROR the trait `Trait` is not dyn compatible
 }
diff --git a/tests/ui/issues/issue-58734.stderr b/tests/ui/issues/issue-58734.stderr
index a2acd9dcf81..c4624cecc62 100644
--- a/tests/ui/issues/issue-58734.stderr
+++ b/tests/ui/issues/issue-58734.stderr
@@ -12,12 +12,38 @@ help: if this is a dyn-compatible trait, use `dyn`
 LL |     <dyn Trait>::nonexistent(());
    |     ++++      +
 
+error[E0038]: the trait `Trait` is not dyn compatible
+  --> $DIR/issue-58734.rs:20:5
+   |
+LL |     Trait::nonexistent(());
+   |     ^^^^^ `Trait` is not dyn compatible
+   |
+note: for a trait to be dyn compatible it needs to allow building a vtable
+      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
+  --> $DIR/issue-58734.rs:4:8
+   |
+LL | trait Trait {
+   |       ----- this trait is not dyn compatible...
+...
+LL |     fn dyn_incompatible() -> Self;
+   |        ^^^^^^^^^^^^^^^^ ...because associated function `dyn_incompatible` has no `self` parameter
+   = help: only type `()` implements `Trait`; consider using it directly instead.
+help: consider turning `dyn_incompatible` into a method by giving it a `&self` argument
+   |
+LL |     fn dyn_incompatible(&self) -> Self;
+   |                         +++++
+help: alternatively, consider constraining `dyn_incompatible` so it does not apply to trait objects
+   |
+LL |     fn dyn_incompatible() -> Self where Self: Sized;
+   |                                   +++++++++++++++++
+
 error[E0599]: no function or associated item named `nonexistent` found for trait object `dyn Trait` in the current scope
   --> $DIR/issue-58734.rs:20:12
    |
 LL |     Trait::nonexistent(());
    |            ^^^^^^^^^^^ function or associated item not found in `dyn Trait`
 
-error: aborting due to 1 previous error; 1 warning emitted
+error: aborting due to 2 previous errors; 1 warning emitted
 
-For more information about this error, try `rustc --explain E0599`.
+Some errors have detailed explanations: E0038, E0599.
+For more information about an error, try `rustc --explain E0038`.
diff --git a/tests/ui/let-else/let-else-deref-coercion.stderr b/tests/ui/let-else/let-else-deref-coercion.stderr
index 07347af76e4..543737868c9 100644
--- a/tests/ui/let-else/let-else-deref-coercion.stderr
+++ b/tests/ui/let-else/let-else-deref-coercion.stderr
@@ -8,9 +8,8 @@ LL |         let Bar::Present(z) = self else {
    |
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -         let Bar::Present(z) = self else {
-LL +         let Bar::Present(z) = &**self else {
-   |
+LL |         let Bar::Present(z) = &**self else {
+   |                               +++
 
 error[E0308]: mismatched types
   --> $DIR/let-else-deref-coercion.rs:68:13
@@ -22,9 +21,8 @@ LL |         let Bar(z) = x;
    |
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -         let Bar(z) = x;
-LL +         let Bar(z) = &**x;
-   |
+LL |         let Bar(z) = &**x;
+   |                      +++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/lexer/lex-bad-char-literals-1.stderr b/tests/ui/lexer/lex-bad-char-literals-1.stderr
index 49683c10237..0985e274c02 100644
--- a/tests/ui/lexer/lex-bad-char-literals-1.stderr
+++ b/tests/ui/lexer/lex-bad-char-literals-1.stderr
@@ -32,9 +32,8 @@ LL |     "\●"
    = help: for more information, visit <https://doc.rust-lang.org/reference/tokens.html#literals>
 help: if you meant to write a literal backslash (perhaps escaping in a regular expression), consider a raw string literal
    |
-LL -     "\●"
-LL +     r"\●"
-   |
+LL |     r"\●"
+   |     +
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/lifetimes/borrowck-let-suggestion.stderr b/tests/ui/lifetimes/borrowck-let-suggestion.stderr
index e0adb164140..4703d7f10dc 100644
--- a/tests/ui/lifetimes/borrowck-let-suggestion.stderr
+++ b/tests/ui/lifetimes/borrowck-let-suggestion.stderr
@@ -12,9 +12,8 @@ LL |     x.use_mut();
    = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: consider consuming the `Vec<i32>` when turning it into an `Iterator`
    |
-LL -     let mut x = vec![1].iter();
-LL +     let mut x = vec![1].into_iter();
-   |
+LL |     let mut x = vec![1].into_iter();
+   |                         +++++
 help: consider using a `let` binding to create a longer lived value
    |
 LL ~     let binding = vec![1];
diff --git a/tests/ui/lint/let_underscore/issue-119696-err-on-fn.stderr b/tests/ui/lint/let_underscore/issue-119696-err-on-fn.stderr
index a244d7604d7..105506968b1 100644
--- a/tests/ui/lint/let_underscore/issue-119696-err-on-fn.stderr
+++ b/tests/ui/lint/let_underscore/issue-119696-err-on-fn.stderr
@@ -11,9 +11,8 @@ LL | #![deny(let_underscore_drop)]
    |         ^^^^^^^^^^^^^^^^^^^
 help: consider binding to an unused variable to avoid immediately dropping the value
    |
-LL -     let _ = foo();
-LL +     let _unused = foo();
-   |
+LL |     let _unused = foo();
+   |          ++++++
 help: consider immediately dropping the value
    |
 LL -     let _ = foo();
diff --git a/tests/ui/lint/let_underscore/issue-119697-extra-let.stderr b/tests/ui/lint/let_underscore/issue-119697-extra-let.stderr
index 8773d5df443..3ff57ab441d 100644
--- a/tests/ui/lint/let_underscore/issue-119697-extra-let.stderr
+++ b/tests/ui/lint/let_underscore/issue-119697-extra-let.stderr
@@ -28,9 +28,8 @@ LL |     let _ = field;
    |
 help: consider binding to an unused variable to avoid immediately dropping the value
    |
-LL -     let _ = field;
-LL +     let _unused = field;
-   |
+LL |     let _unused = field;
+   |          ++++++
 help: consider immediately dropping the value
    |
 LL -     let _ = field;
diff --git a/tests/ui/lint/let_underscore/let_underscore_drop.stderr b/tests/ui/lint/let_underscore/let_underscore_drop.stderr
index c7984d629da..001827b0d37 100644
--- a/tests/ui/lint/let_underscore/let_underscore_drop.stderr
+++ b/tests/ui/lint/let_underscore/let_underscore_drop.stderr
@@ -11,9 +11,8 @@ LL | #![warn(let_underscore_drop)]
    |         ^^^^^^^^^^^^^^^^^^^
 help: consider binding to an unused variable to avoid immediately dropping the value
    |
-LL -     let _ = NontrivialDrop;
-LL +     let _unused = NontrivialDrop;
-   |
+LL |     let _unused = NontrivialDrop;
+   |          ++++++
 help: consider immediately dropping the value
    |
 LL -     let _ = NontrivialDrop;
diff --git a/tests/ui/lint/let_underscore/let_underscore_lock.stderr b/tests/ui/lint/let_underscore/let_underscore_lock.stderr
index 60d5ed649f5..a54a23e364b 100644
--- a/tests/ui/lint/let_underscore/let_underscore_lock.stderr
+++ b/tests/ui/lint/let_underscore/let_underscore_lock.stderr
@@ -7,9 +7,8 @@ LL |     let _ = data.lock().unwrap();
    = note: `#[deny(let_underscore_lock)]` on by default
 help: consider binding to an unused variable to avoid immediately dropping the value
    |
-LL -     let _ = data.lock().unwrap();
-LL +     let _unused = data.lock().unwrap();
-   |
+LL |     let _unused = data.lock().unwrap();
+   |          ++++++
 help: consider immediately dropping the value
    |
 LL -     let _ = data.lock().unwrap();
@@ -24,9 +23,8 @@ LL |     let _ = data.lock();
    |
 help: consider binding to an unused variable to avoid immediately dropping the value
    |
-LL -     let _ = data.lock();
-LL +     let _unused = data.lock();
-   |
+LL |     let _unused = data.lock();
+   |          ++++++
 help: consider immediately dropping the value
    |
 LL -     let _ = data.lock();
@@ -42,9 +40,8 @@ LL |     let (_, _) = (data.lock(), 1);
    = help: consider immediately dropping the value using `drop(..)` after the `let` statement
 help: consider binding to an unused variable to avoid immediately dropping the value
    |
-LL -     let (_, _) = (data.lock(), 1);
-LL +     let (_unused, _) = (data.lock(), 1);
-   |
+LL |     let (_unused, _) = (data.lock(), 1);
+   |           ++++++
 
 error: non-binding let on a synchronization lock
   --> $DIR/let_underscore_lock.rs:16:26
@@ -55,9 +52,8 @@ LL |     let (_a, Struct { a: _ }) = (0, Struct { a: data.lock() });
    = help: consider immediately dropping the value using `drop(..)` after the `let` statement
 help: consider binding to an unused variable to avoid immediately dropping the value
    |
-LL -     let (_a, Struct { a: _ }) = (0, Struct { a: data.lock() });
-LL +     let (_a, Struct { a: _unused }) = (0, Struct { a: data.lock() });
-   |
+LL |     let (_a, Struct { a: _unused }) = (0, Struct { a: data.lock() });
+   |                           ++++++
 
 error: non-binding let on a synchronization lock
   --> $DIR/let_underscore_lock.rs:18:6
diff --git a/tests/ui/lint/lint-strict-provenance-lossy-casts.stderr b/tests/ui/lint/lint-strict-provenance-lossy-casts.stderr
index aeee69ae7af..bcef0ae424e 100644
--- a/tests/ui/lint/lint-strict-provenance-lossy-casts.stderr
+++ b/tests/ui/lint/lint-strict-provenance-lossy-casts.stderr
@@ -25,9 +25,8 @@ LL |     let addr_32bit = &x as *const u8 as u32;
    = help: if you can't comply with strict provenance and need to expose the pointer provenance you can use `.expose_provenance()` instead
 help: use `.addr()` to obtain the address of a pointer
    |
-LL -     let addr_32bit = &x as *const u8 as u32;
-LL +     let addr_32bit = (&x as *const u8).addr() as u32;
-   |
+LL |     let addr_32bit = (&x as *const u8).addr() as u32;
+   |                      +               ++++++++
 
 error: under strict provenance it is considered bad style to cast pointer `*const u8` to integer `usize`
   --> $DIR/lint-strict-provenance-lossy-casts.rs:14:20
diff --git a/tests/ui/lint/static-mut-refs.e2021.stderr b/tests/ui/lint/static-mut-refs.e2021.stderr
index abd579b336f..337d5d0b307 100644
--- a/tests/ui/lint/static-mut-refs.e2021.stderr
+++ b/tests/ui/lint/static-mut-refs.e2021.stderr
@@ -9,9 +9,8 @@ LL |         let _y = &X;
    = note: `#[warn(static_mut_refs)]` on by default
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let _y = &X;
-LL +         let _y = &raw const X;
-   |
+LL |         let _y = &raw const X;
+   |                   +++++++++
 
 warning: creating a mutable reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:42:18
@@ -46,9 +45,8 @@ LL |         let (_b, _c) = (&X, &Y);
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let (_b, _c) = (&X, &Y);
-LL +         let (_b, _c) = (&raw const X, &Y);
-   |
+LL |         let (_b, _c) = (&raw const X, &Y);
+   |                          +++++++++
 
 warning: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:54:29
@@ -60,9 +58,8 @@ LL |         let (_b, _c) = (&X, &Y);
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let (_b, _c) = (&X, &Y);
-LL +         let (_b, _c) = (&X, &raw const Y);
-   |
+LL |         let (_b, _c) = (&X, &raw const Y);
+   |                              +++++++++
 
 warning: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:60:13
@@ -74,9 +71,8 @@ LL |         foo(&X);
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         foo(&X);
-LL +         foo(&raw const X);
-   |
+LL |         foo(&raw const X);
+   |              +++++++++
 
 warning: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:66:17
@@ -106,9 +102,8 @@ LL |         let _v = &A.value;
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let _v = &A.value;
-LL +         let _v = &raw const A.value;
-   |
+LL |         let _v = &raw const A.value;
+   |                   +++++++++
 
 warning: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:80:18
@@ -120,9 +115,8 @@ LL |         let _s = &A.s.value;
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let _s = &A.s.value;
-LL +         let _s = &raw const A.s.value;
-   |
+LL |         let _s = &raw const A.s.value;
+   |                   +++++++++
 
 warning: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:84:22
diff --git a/tests/ui/lint/static-mut-refs.e2024.stderr b/tests/ui/lint/static-mut-refs.e2024.stderr
index 1387cdf0b32..cf7f0a86f4f 100644
--- a/tests/ui/lint/static-mut-refs.e2024.stderr
+++ b/tests/ui/lint/static-mut-refs.e2024.stderr
@@ -9,9 +9,8 @@ LL |         let _y = &X;
    = note: `#[deny(static_mut_refs)]` on by default
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let _y = &X;
-LL +         let _y = &raw const X;
-   |
+LL |         let _y = &raw const X;
+   |                   +++++++++
 
 error: creating a mutable reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:42:18
@@ -46,9 +45,8 @@ LL |         let (_b, _c) = (&X, &Y);
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let (_b, _c) = (&X, &Y);
-LL +         let (_b, _c) = (&raw const X, &Y);
-   |
+LL |         let (_b, _c) = (&raw const X, &Y);
+   |                          +++++++++
 
 error: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:54:29
@@ -60,9 +58,8 @@ LL |         let (_b, _c) = (&X, &Y);
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let (_b, _c) = (&X, &Y);
-LL +         let (_b, _c) = (&X, &raw const Y);
-   |
+LL |         let (_b, _c) = (&X, &raw const Y);
+   |                              +++++++++
 
 error: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:60:13
@@ -74,9 +71,8 @@ LL |         foo(&X);
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         foo(&X);
-LL +         foo(&raw const X);
-   |
+LL |         foo(&raw const X);
+   |              +++++++++
 
 error: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:66:17
@@ -106,9 +102,8 @@ LL |         let _v = &A.value;
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let _v = &A.value;
-LL +         let _v = &raw const A.value;
-   |
+LL |         let _v = &raw const A.value;
+   |                   +++++++++
 
 error: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:80:18
@@ -120,9 +115,8 @@ LL |         let _s = &A.s.value;
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -         let _s = &A.s.value;
-LL +         let _s = &raw const A.s.value;
-   |
+LL |         let _s = &raw const A.s.value;
+   |                   +++++++++
 
 error: creating a shared reference to mutable static is discouraged
   --> $DIR/static-mut-refs.rs:84:22
diff --git a/tests/ui/lint/type-overflow.stderr b/tests/ui/lint/type-overflow.stderr
index 0ac67fddaa7..6ba0c9d907c 100644
--- a/tests/ui/lint/type-overflow.stderr
+++ b/tests/ui/lint/type-overflow.stderr
@@ -66,9 +66,8 @@ LL |     let fail: i128 = 0x8000_0000_0000_0000_0000_0000_0000_0000;
    = help: consider using the type `u128` instead
 help: to use as a negative number (decimal `-170141183460469231731687303715884105728`), consider using the type `u128` for the literal and cast it to `i128`
    |
-LL -     let fail: i128 = 0x8000_0000_0000_0000_0000_0000_0000_0000;
-LL +     let fail: i128 = 0x8000_0000_0000_0000_0000_0000_0000_0000u128 as i128;
-   |
+LL |     let fail: i128 = 0x8000_0000_0000_0000_0000_0000_0000_0000u128 as i128;
+   |                                                               ++++++++++++
 
 warning: literal out of range for `i32`
   --> $DIR/type-overflow.rs:27:16
@@ -117,9 +116,8 @@ LL |     let fail = 0x8FFF_FFFF_FFFF_FFFE;
    = help: consider using the type `u64` instead
 help: to use as a negative number (decimal `-2`), consider using the type `u32` for the literal and cast it to `i32`
    |
-LL -     let fail = 0x8FFF_FFFF_FFFF_FFFE;
-LL +     let fail = 0x8FFF_FFFF_FFFF_FFFEu32 as i32;
-   |
+LL |     let fail = 0x8FFF_FFFF_FFFF_FFFEu32 as i32;
+   |                                     ++++++++++
 
 warning: literal out of range for `i8`
   --> $DIR/type-overflow.rs:46:17
diff --git a/tests/ui/lint/unused/issue-67691-unused-field-in-or-pattern.stderr b/tests/ui/lint/unused/issue-67691-unused-field-in-or-pattern.stderr
index 8922f484d3e..2d43e612580 100644
--- a/tests/ui/lint/unused/issue-67691-unused-field-in-or-pattern.stderr
+++ b/tests/ui/lint/unused/issue-67691-unused-field-in-or-pattern.stderr
@@ -12,9 +12,8 @@ LL | #![deny(unused)]
    = note: `#[deny(unused_variables)]` implied by `#[deny(unused)]`
 help: try ignoring the field
    |
-LL -         A { i, j } | B { i, j } => {
-LL +         A { i, j: _ } | B { i, j: _ } => {
-   |
+LL |         A { i, j: _ } | B { i, j: _ } => {
+   |                 +++             +++
 
 error: unused variable: `j`
   --> $DIR/issue-67691-unused-field-in-or-pattern.rs:30:16
@@ -36,9 +35,8 @@ LL |         Some(A { i, j } | B { i, j }) => {
    |
 help: try ignoring the field
    |
-LL -         Some(A { i, j } | B { i, j }) => {
-LL +         Some(A { i, j: _ } | B { i, j: _ }) => {
-   |
+LL |         Some(A { i, j: _ } | B { i, j: _ }) => {
+   |                      +++             +++
 
 error: unused variable: `j`
   --> $DIR/issue-67691-unused-field-in-or-pattern.rs:52:21
diff --git a/tests/ui/lint/wide_pointer_comparisons.stderr b/tests/ui/lint/wide_pointer_comparisons.stderr
index f5f8060902b..5a0b914d832 100644
--- a/tests/ui/lint/wide_pointer_comparisons.stderr
+++ b/tests/ui/lint/wide_pointer_comparisons.stderr
@@ -627,9 +627,8 @@ LL |         cmp!(a, b);
    |
 help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
    |
-LL -         cmp!(a, b);
-LL +         cmp!(std::ptr::addr_eq(a, b));
-   |
+LL |         cmp!(std::ptr::addr_eq(a, b));
+   |              ++++++++++++++++++    +
 
 warning: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
   --> $DIR/wide_pointer_comparisons.rs:159:39
diff --git a/tests/ui/macros/expr_2021_cargo_fix_edition.stderr b/tests/ui/macros/expr_2021_cargo_fix_edition.stderr
index 8ab6938fe19..a2c281d9c0a 100644
--- a/tests/ui/macros/expr_2021_cargo_fix_edition.stderr
+++ b/tests/ui/macros/expr_2021_cargo_fix_edition.stderr
@@ -13,9 +13,8 @@ LL | #![warn(edition_2024_expr_fragment_specifier)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: to keep the existing behavior, use the `expr_2021` fragment specifier
    |
-LL -     ($e:expr) => {
-LL +     ($e:expr_2021) => {
-   |
+LL |     ($e:expr_2021) => {
+   |             +++++
 
 warning: the `expr` fragment specifier will accept more expressions in the 2024 edition
   --> $DIR/expr_2021_cargo_fix_edition.rs:11:11
@@ -27,9 +26,8 @@ LL |     ($($i:expr)*) => { };
    = note: for more information, see Migration Guide <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/macro-fragment-specifiers.html>
 help: to keep the existing behavior, use the `expr_2021` fragment specifier
    |
-LL -     ($($i:expr)*) => { };
-LL +     ($($i:expr_2021)*) => { };
-   |
+LL |     ($($i:expr_2021)*) => { };
+   |               +++++
 
 warning: 2 warnings emitted
 
diff --git a/tests/ui/macros/macro-backtrace-invalid-internals.stderr b/tests/ui/macros/macro-backtrace-invalid-internals.stderr
index bb8250d58b0..836098bd9c0 100644
--- a/tests/ui/macros/macro-backtrace-invalid-internals.stderr
+++ b/tests/ui/macros/macro-backtrace-invalid-internals.stderr
@@ -43,9 +43,8 @@ LL |     real_method_stmt!();
    = note: this error originates in the macro `real_method_stmt` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: you must specify a concrete type for this numeric value, like `f32`
    |
-LL -           2.0.neg()
-LL +           2.0_f32.neg()
-   |
+LL |           2.0_f32.neg()
+   |              ++++
 
 error[E0599]: no method named `fake` found for type `{integer}` in the current scope
   --> $DIR/macro-backtrace-invalid-internals.rs:23:13
@@ -92,9 +91,8 @@ LL |     let _ = real_method_expr!();
    = note: this error originates in the macro `real_method_expr` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: you must specify a concrete type for this numeric value, like `f32`
    |
-LL -           2.0.neg()
-LL +           2.0_f32.neg()
-   |
+LL |           2.0_f32.neg()
+   |              ++++
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/match/issue-56685.stderr b/tests/ui/match/issue-56685.stderr
index 9655a380811..6a1d152ed5b 100644
--- a/tests/ui/match/issue-56685.stderr
+++ b/tests/ui/match/issue-56685.stderr
@@ -11,9 +11,8 @@ LL | #![deny(unused_variables)]
    |         ^^^^^^^^^^^^^^^^
 help: if this is intentional, prefix it with an underscore
    |
-LL -         E::A(x) | E::B(x) => {}
-LL +         E::A(_x) | E::B(_x) => {}
-   |
+LL |         E::A(_x) | E::B(_x) => {}
+   |              +          +
 
 error: unused variable: `x`
   --> $DIR/issue-56685.rs:25:14
@@ -23,9 +22,8 @@ LL |         F::A(x, y) | F::B(x, y) => { y },
    |
 help: if this is intentional, prefix it with an underscore
    |
-LL -         F::A(x, y) | F::B(x, y) => { y },
-LL +         F::A(_x, y) | F::B(_x, y) => { y },
-   |
+LL |         F::A(_x, y) | F::B(_x, y) => { y },
+   |              +             +
 
 error: unused variable: `a`
   --> $DIR/issue-56685.rs:27:14
@@ -47,9 +45,8 @@ LL |     let _ = if let F::A(x, y) | F::B(x, y) = F::A(1, 2) {
    |
 help: if this is intentional, prefix it with an underscore
    |
-LL -     let _ = if let F::A(x, y) | F::B(x, y) = F::A(1, 2) {
-LL +     let _ = if let F::A(_x, y) | F::B(_x, y) = F::A(1, 2) {
-   |
+LL |     let _ = if let F::A(_x, y) | F::B(_x, y) = F::A(1, 2) {
+   |                         +             +
 
 error: unused variable: `x`
   --> $DIR/issue-56685.rs:39:20
@@ -59,9 +56,8 @@ LL |     while let F::A(x, y) | F::B(x, y) = F::A(1, 2) {
    |
 help: if this is intentional, prefix it with an underscore
    |
-LL -     while let F::A(x, y) | F::B(x, y) = F::A(1, 2) {
-LL +     while let F::A(_x, y) | F::B(_x, y) = F::A(1, 2) {
-   |
+LL |     while let F::A(_x, y) | F::B(_x, y) = F::A(1, 2) {
+   |                    +             +
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/methods/inherent-bound-in-probe.stderr b/tests/ui/methods/inherent-bound-in-probe.stderr
index 8d7cc462280..433ef02a2aa 100644
--- a/tests/ui/methods/inherent-bound-in-probe.stderr
+++ b/tests/ui/methods/inherent-bound-in-probe.stderr
@@ -9,10 +9,10 @@ note: required by a bound in `std::iter::IntoIterator::IntoIter`
   --> $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
 
 error[E0275]: overflow evaluating the requirement `&_: IntoIterator`
-  --> $DIR/inherent-bound-in-probe.rs:44:17
+  --> $DIR/inherent-bound-in-probe.rs:44:9
    |
 LL |         Helper::new(&self.0)
-   |                 ^^^
+   |         ^^^^^^
    |
    = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`inherent_bound_in_probe`)
 note: required for `&BitReaderWrapper<_>` to implement `IntoIterator`
@@ -25,11 +25,14 @@ LL |     &'a T: IntoIterator<Item = &'a u8>,
    |                         ------------- unsatisfied trait bound introduced here
    = note: 126 redundant requirements hidden
    = note: required for `&BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<BitReaderWrapper<_>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>` to implement `IntoIterator`
-note: required by a bound in `Helper<'a, T>`
-  --> $DIR/inherent-bound-in-probe.rs:25:25
+note: required by a bound in `Helper`
+  --> $DIR/inherent-bound-in-probe.rs:18:12
    |
+LL | struct Helper<'a, T>
+   |        ------ required by a bound in this struct
+LL | where
 LL |     &'a T: IntoIterator<Item = &'a u8>,
-   |                         ^^^^^^^^^^^^^ required by this bound in `Helper<'a, T>`
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `Helper`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/methods/issues/issue-90315.stderr b/tests/ui/methods/issues/issue-90315.stderr
index e194a918834..e495701a3d7 100644
--- a/tests/ui/methods/issues/issue-90315.stderr
+++ b/tests/ui/methods/issues/issue-90315.stderr
@@ -181,9 +181,8 @@ LL |     let _res: i32 = ..6.take(2).sum();
    |
 help: you must specify a concrete type for this numeric value, like `i32`
    |
-LL -     let _res: i32 = ..6.take(2).sum();
-LL +     let _res: i32 = ..6_i32.take(2).sum();
-   |
+LL |     let _res: i32 = ..6_i32.take(2).sum();
+   |                        ++++
 
 error: aborting due to 18 previous errors
 
diff --git a/tests/ui/methods/method-on-ambiguous-numeric-type.stderr b/tests/ui/methods/method-on-ambiguous-numeric-type.stderr
index d688bcc90c8..c9a54951307 100644
--- a/tests/ui/methods/method-on-ambiguous-numeric-type.stderr
+++ b/tests/ui/methods/method-on-ambiguous-numeric-type.stderr
@@ -6,9 +6,8 @@ LL |     let x = 2.0.neg();
    |
 help: you must specify a concrete type for this numeric value, like `f32`
    |
-LL -     let x = 2.0.neg();
-LL +     let x = 2.0_f32.neg();
-   |
+LL |     let x = 2.0_f32.neg();
+   |                ++++
 
 error[E0689]: can't call method `neg` on ambiguous numeric type `{float}`
   --> $DIR/method-on-ambiguous-numeric-type.rs:17:15
diff --git a/tests/ui/mir/issue-112269.stderr b/tests/ui/mir/issue-112269.stderr
index 29b69cb7e20..fc8bf5d67b5 100644
--- a/tests/ui/mir/issue-112269.stderr
+++ b/tests/ui/mir/issue-112269.stderr
@@ -11,9 +11,8 @@ LL |     let x: i32 = 3;
    = note: the matched value is of type `i32`
 help: introduce a variable instead
    |
-LL -     let x: i32 = 3;
-LL +     let x_var: i32 = 3;
-   |
+LL |     let x_var: i32 = 3;
+   |          ++++
 
 error[E0005]: refutable pattern in local binding
   --> $DIR/issue-112269.rs:7:9
@@ -28,9 +27,8 @@ LL |     let y = 4;
    = note: the matched value is of type `i32`
 help: introduce a variable instead
    |
-LL -     let y = 4;
-LL +     let y_var = 4;
-   |
+LL |     let y_var = 4;
+   |          ++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/mismatched_types/issue-112036.stderr b/tests/ui/mismatched_types/issue-112036.stderr
index 29559980cb4..fed6b11a7b2 100644
--- a/tests/ui/mismatched_types/issue-112036.stderr
+++ b/tests/ui/mismatched_types/issue-112036.stderr
@@ -8,9 +8,8 @@ LL |     fn drop(self) {}
               found signature `fn(Foo)`
 help: change the self-receiver type to match the trait
    |
-LL -     fn drop(self) {}
-LL +     fn drop(&mut self) {}
-   |
+LL |     fn drop(&mut self) {}
+   |             ++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr b/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr
index 62f087ca6b7..d69e83cce9a 100644
--- a/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr
+++ b/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr
@@ -195,9 +195,8 @@ LL |     [t, t];
    |      - you could clone this value
 help: consider further restricting type parameter `T` with trait `Copy`
    |
-LL -     T:,
-LL +     T:, T: Copy
-   |
+LL |     T:, T: Copy
+   |         +++++++
 
 error: aborting due to 11 previous errors
 
diff --git a/tests/ui/namespace/namespace-mix.stderr b/tests/ui/namespace/namespace-mix.stderr
index 41891c5144b..412ea4aba30 100644
--- a/tests/ui/namespace/namespace-mix.stderr
+++ b/tests/ui/namespace/namespace-mix.stderr
@@ -10,9 +10,8 @@ LL |     check(m1::S);
    = note: can't use a type alias as a constructor
 help: a tuple struct with a similar name exists
    |
-LL -     check(m1::S);
-LL +     check(m1::TS);
-   |
+LL |     check(m1::TS);
+   |               +
 help: consider importing one of these constants instead
    |
 LL + use m2::S;
@@ -39,9 +38,8 @@ LL |     pub struct TS();
    = note: can't use a type alias as a constructor
 help: a tuple struct with a similar name exists
    |
-LL -     check(xm1::S);
-LL +     check(xm1::TS);
-   |
+LL |     check(xm1::TS);
+   |                +
 help: consider importing one of these constants instead
    |
 LL + use m2::S;
@@ -66,9 +64,8 @@ LL |     check(m7::V);
    = note: can't use a type alias as a constructor
 help: a tuple variant with a similar name exists
    |
-LL -     check(m7::V);
-LL +     check(m7::TV);
-   |
+LL |     check(m7::TV);
+   |               +
 help: consider importing one of these constants instead
    |
 LL + use m8::V;
@@ -95,9 +92,8 @@ LL |         TV(),
    = note: can't use a type alias as a constructor
 help: a tuple variant with a similar name exists
    |
-LL -     check(xm7::V);
-LL +     check(xm7::TV);
-   |
+LL |     check(xm7::TV);
+   |                +
 help: consider importing one of these constants instead
    |
 LL + use m8::V;
diff --git a/tests/ui/nll/ty-outlives/projection-no-regions-closure.stderr b/tests/ui/nll/ty-outlives/projection-no-regions-closure.stderr
index 980670fee69..a01b1d5174d 100644
--- a/tests/ui/nll/ty-outlives/projection-no-regions-closure.stderr
+++ b/tests/ui/nll/ty-outlives/projection-no-regions-closure.stderr
@@ -33,9 +33,8 @@ LL |     with_signature(x, |mut y| Box::new(y.next()))
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     T: Iterator,
-LL +     T: Iterator, <T as Iterator>::Item: 'a
-   |
+LL |     T: Iterator, <T as Iterator>::Item: 'a
+   |                  +++++++++++++++++++++++++
 
 note: external requirements
   --> $DIR/projection-no-regions-closure.rs:34:23
@@ -96,9 +95,8 @@ LL |     with_signature(x, |mut y| Box::new(y.next()))
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     T: 'b + Iterator,
-LL +     T: 'b + Iterator, <T as Iterator>::Item: 'a
-   |
+LL |     T: 'b + Iterator, <T as Iterator>::Item: 'a
+   |                       +++++++++++++++++++++++++
 
 note: external requirements
   --> $DIR/projection-no-regions-closure.rs:52:23
diff --git a/tests/ui/nll/ty-outlives/projection-no-regions-fn.stderr b/tests/ui/nll/ty-outlives/projection-no-regions-fn.stderr
index 53da981d702..07debd308c2 100644
--- a/tests/ui/nll/ty-outlives/projection-no-regions-fn.stderr
+++ b/tests/ui/nll/ty-outlives/projection-no-regions-fn.stderr
@@ -9,9 +9,8 @@ LL |     Box::new(x.next())
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     T: Iterator,
-LL +     T: Iterator, <T as Iterator>::Item: 'a
-   |
+LL |     T: Iterator, <T as Iterator>::Item: 'a
+   |                  +++++++++++++++++++++++++
 
 error[E0309]: the associated type `<T as Iterator>::Item` may not live long enough
   --> $DIR/projection-no-regions-fn.rs:28:5
@@ -24,9 +23,8 @@ LL |     Box::new(x.next())
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     T: 'b + Iterator,
-LL +     T: 'b + Iterator, <T as Iterator>::Item: 'a
-   |
+LL |     T: 'b + Iterator, <T as Iterator>::Item: 'a
+   |                       +++++++++++++++++++++++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr b/tests/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr
index 34498f68f67..4b779103a6d 100644
--- a/tests/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr
+++ b/tests/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr
@@ -34,9 +34,8 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     T: Anything<'b, 'c>,
-LL +     T: Anything<'b, 'c>, <T as Anything<'b/#0, 'c/#1>>::AssocType: 'a
-   |
+LL |     T: Anything<'b, 'c>, <T as Anything<'b/#0, 'c/#1>>::AssocType: 'a
+   |                          ++++++++++++++++++++++++++++++++++++++++++++
 
 note: external requirements
   --> $DIR/projection-two-region-trait-bound-closure.rs:48:29
@@ -74,9 +73,8 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     'a: 'a,
-LL +     'a: 'a, <T as Anything<'b/#1, 'c/#2>>::AssocType: 'a
-   |
+LL |     'a: 'a, <T as Anything<'b/#1, 'c/#2>>::AssocType: 'a
+   |             ++++++++++++++++++++++++++++++++++++++++++++
 
 note: external requirements
   --> $DIR/projection-two-region-trait-bound-closure.rs:61:29
diff --git a/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.stderr b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.stderr
index a53c01e506e..4b1e59053c9 100644
--- a/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.stderr
+++ b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.stderr
@@ -9,9 +9,8 @@ LL |     bar::<T::Output>()
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     <T as MyTrait<'a>>::Output: 'b,
-LL +     <T as MyTrait<'a>>::Output: 'b, <T as MyTrait<'a>>::Output: 'a
-   |
+LL |     <T as MyTrait<'a>>::Output: 'b, <T as MyTrait<'a>>::Output: 'a
+   |                                     ++++++++++++++++++++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.stderr b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.stderr
index 36a0f40246e..9c93d663e2d 100644
--- a/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.stderr
+++ b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.stderr
@@ -9,9 +9,8 @@ LL |     bar::<<T as MyTrait<'a>>::Output>()
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     <T as MyTrait<'b>>::Output: 'a,
-LL +     <T as MyTrait<'b>>::Output: 'a, <T as MyTrait<'a>>::Output: 'a
-   |
+LL |     <T as MyTrait<'b>>::Output: 'a, <T as MyTrait<'a>>::Output: 'a
+   |                                     ++++++++++++++++++++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/object-pointer-types.stderr b/tests/ui/object-pointer-types.stderr
index 7e3a13dd90b..ac8e069cfd2 100644
--- a/tests/ui/object-pointer-types.stderr
+++ b/tests/ui/object-pointer-types.stderr
@@ -9,9 +9,8 @@ LL |     x.owned();
    |
 help: there is a method `to_owned` with a similar name
    |
-LL -     x.owned();
-LL +     x.to_owned();
-   |
+LL |     x.to_owned();
+   |       +++
 
 error[E0599]: no method named `owned` found for mutable reference `&mut dyn Foo` in the current scope
   --> $DIR/object-pointer-types.rs:17:7
diff --git a/tests/ui/parser/bad-char-literals.stderr b/tests/ui/parser/bad-char-literals.stderr
index 3513055cb55..b5b05c2c142 100644
--- a/tests/ui/parser/bad-char-literals.stderr
+++ b/tests/ui/parser/bad-char-literals.stderr
@@ -6,9 +6,8 @@ LL |     ''';
    |
 help: escape the character
    |
-LL -     ''';
-LL +     '\'';
-   |
+LL |     '\'';
+   |      +
 
 error: character constant must be escaped: `\n`
   --> $DIR/bad-char-literals.rs:10:6
diff --git a/tests/ui/parser/bad-escape-suggest-raw-string.stderr b/tests/ui/parser/bad-escape-suggest-raw-string.stderr
index 5afa1f4a7f8..15e99b3cb32 100644
--- a/tests/ui/parser/bad-escape-suggest-raw-string.stderr
+++ b/tests/ui/parser/bad-escape-suggest-raw-string.stderr
@@ -7,9 +7,8 @@ LL |     let bad = "ab\[c";
    = help: for more information, visit <https://doc.rust-lang.org/reference/tokens.html#literals>
 help: if you meant to write a literal backslash (perhaps escaping in a regular expression), consider a raw string literal
    |
-LL -     let bad = "ab\[c";
-LL +     let bad = r"ab\[c";
-   |
+LL |     let bad = r"ab\[c";
+   |               +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/parser/byte-literals.stderr b/tests/ui/parser/byte-literals.stderr
index fe3cfb23de8..1c89e8e2864 100644
--- a/tests/ui/parser/byte-literals.stderr
+++ b/tests/ui/parser/byte-literals.stderr
@@ -39,9 +39,8 @@ LL |     b''';
    |
 help: escape the character
    |
-LL -     b''';
-LL +     b'\'';
-   |
+LL |     b'\'';
+   |       +
 
 error: non-ASCII character in byte literal
   --> $DIR/byte-literals.rs:10:7
diff --git a/tests/ui/parser/char/whitespace-character-literal.stderr b/tests/ui/parser/char/whitespace-character-literal.stderr
index 53f2eb3ecba..f273b5d61d5 100644
--- a/tests/ui/parser/char/whitespace-character-literal.stderr
+++ b/tests/ui/parser/char/whitespace-character-literal.stderr
@@ -11,9 +11,8 @@ LL |     let _hair_space_around = ' x​';
    |                               ^^
 help: consider removing the non-printing characters
    |
-LL -     let _hair_space_around = ' x​';
-LL +     let _hair_space_around = 'x​';
-   |
+LL |     let _hair_space_around = 'x​';
+   |                               ~
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/parser/extern-no-fn.stderr b/tests/ui/parser/extern-no-fn.stderr
index 2ee905429c4..67acbf9b87f 100644
--- a/tests/ui/parser/extern-no-fn.stderr
+++ b/tests/ui/parser/extern-no-fn.stderr
@@ -11,9 +11,8 @@ LL | }
    |
 help: if you meant to call a macro, try
    |
-LL -     f();
-LL +     f!();
-   |
+LL |     f!();
+   |      +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/parser/issues/issue-65257-invalid-var-decl-recovery.stderr b/tests/ui/parser/issues/issue-65257-invalid-var-decl-recovery.stderr
index 767f63d6958..7146949ca2f 100644
--- a/tests/ui/parser/issues/issue-65257-invalid-var-decl-recovery.stderr
+++ b/tests/ui/parser/issues/issue-65257-invalid-var-decl-recovery.stderr
@@ -54,9 +54,8 @@ LL |     mut n = 0;
    |
 help: missing keyword
    |
-LL -     mut n = 0;
-LL +     let mut n = 0;
-   |
+LL |     let mut n = 0;
+   |     +++
 
 error: invalid variable declaration
   --> $DIR/issue-65257-invalid-var-decl-recovery.rs:16:5
@@ -66,9 +65,8 @@ LL |     mut var;
    |
 help: missing keyword
    |
-LL -     mut var;
-LL +     let mut var;
-   |
+LL |     let mut var;
+   |     +++
 
 error[E0308]: mismatched types
   --> $DIR/issue-65257-invalid-var-decl-recovery.rs:20:33
diff --git a/tests/ui/parser/issues/issue-87086-colon-path-sep.stderr b/tests/ui/parser/issues/issue-87086-colon-path-sep.stderr
index fa848368945..a9bad96f9af 100644
--- a/tests/ui/parser/issues/issue-87086-colon-path-sep.stderr
+++ b/tests/ui/parser/issues/issue-87086-colon-path-sep.stderr
@@ -8,9 +8,8 @@ LL |         Foo:Bar => {}
    |
 help: maybe write a path separator here
    |
-LL -         Foo:Bar => {}
-LL +         Foo::Bar => {}
-   |
+LL |         Foo::Bar => {}
+   |             +
 
 error: expected one of `!`, `(`, `...`, `..=`, `..`, `::`, `{`, or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:23:17
@@ -22,9 +21,8 @@ LL |         qux::Foo:Bar => {}
    |
 help: maybe write a path separator here
    |
-LL -         qux::Foo:Bar => {}
-LL +         qux::Foo::Bar => {}
-   |
+LL |         qux::Foo::Bar => {}
+   |                  +
 
 error: expected one of `@` or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:29:12
@@ -36,9 +34,8 @@ LL |         qux:Foo::Baz => {}
    |
 help: maybe write a path separator here
    |
-LL -         qux:Foo::Baz => {}
-LL +         qux::Foo::Baz => {}
-   |
+LL |         qux::Foo::Baz => {}
+   |             +
 
 error: expected one of `@` or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:35:12
@@ -50,9 +47,8 @@ LL |         qux: Foo::Baz if true => {}
    |
 help: maybe write a path separator here
    |
-LL -         qux: Foo::Baz if true => {}
-LL +         qux::Foo::Baz if true => {}
-   |
+LL |         qux::Foo::Baz if true => {}
+   |            ~~
 
 error: expected one of `@` or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:40:15
@@ -64,9 +60,8 @@ LL |     if let Foo:Bar = f() {
    |
 help: maybe write a path separator here
    |
-LL -     if let Foo:Bar = f() {
-LL +     if let Foo::Bar = f() {
-   |
+LL |     if let Foo::Bar = f() {
+   |                +
 
 error: expected one of `@` or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:49:16
@@ -78,9 +73,8 @@ LL |         ref qux: Foo::Baz => {}
    |
 help: maybe write a path separator here
    |
-LL -         ref qux: Foo::Baz => {}
-LL +         ref qux::Foo::Baz => {}
-   |
+LL |         ref qux::Foo::Baz => {}
+   |                ~~
 
 error: expected one of `@` or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:58:16
@@ -92,9 +86,8 @@ LL |         mut qux: Foo::Baz => {}
    |
 help: maybe write a path separator here
    |
-LL -         mut qux: Foo::Baz => {}
-LL +         mut qux::Foo::Baz => {}
-   |
+LL |         mut qux::Foo::Baz => {}
+   |                ~~
 
 error: expected one of `@` or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:69:12
@@ -106,9 +99,8 @@ LL |         Foo:Bar::Baz => {}
    |
 help: maybe write a path separator here
    |
-LL -         Foo:Bar::Baz => {}
-LL +         Foo::Bar::Baz => {}
-   |
+LL |         Foo::Bar::Baz => {}
+   |             +
 
 error: expected one of `@` or `|`, found `:`
   --> $DIR/issue-87086-colon-path-sep.rs:75:12
@@ -120,9 +112,8 @@ LL |         Foo:Bar => {}
    |
 help: maybe write a path separator here
    |
-LL -         Foo:Bar => {}
-LL +         Foo::Bar => {}
-   |
+LL |         Foo::Bar => {}
+   |             +
 
 warning: irrefutable `if let` pattern
   --> $DIR/issue-87086-colon-path-sep.rs:40:8
diff --git a/tests/ui/parser/missing-fn-issue-65381-2.stderr b/tests/ui/parser/missing-fn-issue-65381-2.stderr
index ba2cf497df2..17a25bc6671 100644
--- a/tests/ui/parser/missing-fn-issue-65381-2.stderr
+++ b/tests/ui/parser/missing-fn-issue-65381-2.stderr
@@ -6,9 +6,8 @@ LL | main();
    |
 help: if you meant to call a macro, try
    |
-LL - main();
-LL + main!();
-   |
+LL | main!();
+   |     +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/parser/misspelled-keywords/const.stderr b/tests/ui/parser/misspelled-keywords/const.stderr
index ca76f51f4ed..59346461ce7 100644
--- a/tests/ui/parser/misspelled-keywords/const.stderr
+++ b/tests/ui/parser/misspelled-keywords/const.stderr
@@ -6,9 +6,8 @@ LL | cons A: u8 = 10;
    |
 help: there is a keyword `const` with a similar name
    |
-LL - cons A: u8 = 10;
-LL + const A: u8 = 10;
-   |
+LL | const A: u8 = 10;
+   |     +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/parser/recover/turbofish-arg-with-stray-colon.stderr b/tests/ui/parser/recover/turbofish-arg-with-stray-colon.stderr
index 15866211954..583b98c650f 100644
--- a/tests/ui/parser/recover/turbofish-arg-with-stray-colon.stderr
+++ b/tests/ui/parser/recover/turbofish-arg-with-stray-colon.stderr
@@ -7,9 +7,8 @@ LL |     let x = Tr<A, A:>;
    = note: type ascription syntax has been removed, see issue #101728 <https://github.com/rust-lang/rust/issues/101728>
 help: maybe write a path separator here
    |
-LL -     let x = Tr<A, A:>;
-LL +     let x = Tr<A, A::>;
-   |
+LL |     let x = Tr<A, A::>;
+   |                     +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/parser/type-ascription-in-pattern.stderr b/tests/ui/parser/type-ascription-in-pattern.stderr
index d29c76baa7b..09190754993 100644
--- a/tests/ui/parser/type-ascription-in-pattern.stderr
+++ b/tests/ui/parser/type-ascription-in-pattern.stderr
@@ -8,9 +8,8 @@ LL |         x: i32 => x,
    |
 help: maybe write a path separator here
    |
-LL -         x: i32 => x,
-LL +         x::i32 => x,
-   |
+LL |         x::i32 => x,
+   |          ~~
 
 error: expected one of `...`, `..=`, `..`, or `|`, found `:`
   --> $DIR/type-ascription-in-pattern.rs:12:11
@@ -38,9 +37,8 @@ LL |         x: i32 => (),
    |
 help: maybe write a path separator here
    |
-LL -         x: i32 => (),
-LL +         x::i32 => (),
-   |
+LL |         x::i32 => (),
+   |          ~~
 
 error[E0308]: mismatched types
   --> $DIR/type-ascription-in-pattern.rs:3:19
diff --git a/tests/ui/parser/use-colon-as-mod-sep.stderr b/tests/ui/parser/use-colon-as-mod-sep.stderr
index f25a779f31f..9b4cc0ca237 100644
--- a/tests/ui/parser/use-colon-as-mod-sep.stderr
+++ b/tests/ui/parser/use-colon-as-mod-sep.stderr
@@ -7,9 +7,8 @@ LL | use std::process:Command;
    = note: import paths are delimited using `::`
 help: use double colon
    |
-LL - use std::process:Command;
-LL + use std::process::Command;
-   |
+LL | use std::process::Command;
+   |                  +
 
 error: expected `::`, found `:`
   --> $DIR/use-colon-as-mod-sep.rs:5:8
@@ -20,9 +19,8 @@ LL | use std:fs::File;
    = note: import paths are delimited using `::`
 help: use double colon
    |
-LL - use std:fs::File;
-LL + use std::fs::File;
-   |
+LL | use std::fs::File;
+   |         +
 
 error: expected `::`, found `:`
   --> $DIR/use-colon-as-mod-sep.rs:7:8
@@ -33,9 +31,8 @@ LL | use std:collections:HashMap;
    = note: import paths are delimited using `::`
 help: use double colon
    |
-LL - use std:collections:HashMap;
-LL + use std::collections:HashMap;
-   |
+LL | use std::collections:HashMap;
+   |         +
 
 error: expected `::`, found `:`
   --> $DIR/use-colon-as-mod-sep.rs:7:20
@@ -46,9 +43,8 @@ LL | use std:collections:HashMap;
    = note: import paths are delimited using `::`
 help: use double colon
    |
-LL - use std:collections:HashMap;
-LL + use std:collections::HashMap;
-   |
+LL | use std:collections::HashMap;
+   |                     +
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/pattern/pat-tuple-field-count-cross.stderr b/tests/ui/pattern/pat-tuple-field-count-cross.stderr
index c084ec0b532..e164281826b 100644
--- a/tests/ui/pattern/pat-tuple-field-count-cross.stderr
+++ b/tests/ui/pattern/pat-tuple-field-count-cross.stderr
@@ -121,9 +121,8 @@ LL | pub enum E1 { Z0, Z1(), S(u8, u8, u8) }
    |
 help: use the tuple variant pattern syntax instead
    |
-LL -         E1::Z1 => {}
-LL +         E1::Z1() => {}
-   |
+LL |         E1::Z1() => {}
+   |               ++
 help: a unit variant with a similar name exists
    |
 LL -         E1::Z1 => {}
diff --git a/tests/ui/pattern/pat-tuple-overfield.stderr b/tests/ui/pattern/pat-tuple-overfield.stderr
index 4e8261cb15b..b19b9d19347 100644
--- a/tests/ui/pattern/pat-tuple-overfield.stderr
+++ b/tests/ui/pattern/pat-tuple-overfield.stderr
@@ -155,9 +155,8 @@ LL |         E1::Z1 => {}
    |
 help: use the tuple variant pattern syntax instead
    |
-LL -         E1::Z1 => {}
-LL +         E1::Z1() => {}
-   |
+LL |         E1::Z1() => {}
+   |               ++
 help: a unit variant with a similar name exists
    |
 LL -         E1::Z1 => {}
diff --git a/tests/ui/pattern/patkind-ref-binding-issue-114896.stderr b/tests/ui/pattern/patkind-ref-binding-issue-114896.stderr
index a12b94176c0..a6623c6306b 100644
--- a/tests/ui/pattern/patkind-ref-binding-issue-114896.stderr
+++ b/tests/ui/pattern/patkind-ref-binding-issue-114896.stderr
@@ -6,9 +6,8 @@ LL |         b.make_ascii_uppercase();
    |
 help: consider changing this to be mutable
    |
-LL -         let &b = a;
-LL +         let &(mut b) = a;
-   |
+LL |         let &(mut b) = a;
+   |              ++++  +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/pattern/patkind-ref-binding-issue-122415.stderr b/tests/ui/pattern/patkind-ref-binding-issue-122415.stderr
index 68141af4910..7fa65e3d6bd 100644
--- a/tests/ui/pattern/patkind-ref-binding-issue-122415.stderr
+++ b/tests/ui/pattern/patkind-ref-binding-issue-122415.stderr
@@ -6,9 +6,8 @@ LL |     mutate(&mut x);
    |
 help: consider changing this to be mutable
    |
-LL - fn foo(&x: &i32) {
-LL + fn foo(&(mut x): &i32) {
-   |
+LL | fn foo(&(mut x): &i32) {
+   |         ++++  +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/pattern/usefulness/doc-hidden-fields.stderr b/tests/ui/pattern/usefulness/doc-hidden-fields.stderr
index 2f53ebe6f3f..d7e1b54e749 100644
--- a/tests/ui/pattern/usefulness/doc-hidden-fields.stderr
+++ b/tests/ui/pattern/usefulness/doc-hidden-fields.stderr
@@ -17,19 +17,16 @@ LL |     let HiddenStruct { one } = HiddenStruct::default();
    |
 help: include the missing field in the pattern and ignore the inaccessible fields
    |
-LL -     let HiddenStruct { one } = HiddenStruct::default();
-LL +     let HiddenStruct { one, two, .. } = HiddenStruct::default();
-   |
+LL |     let HiddenStruct { one, two, .. } = HiddenStruct::default();
+   |                           +++++++++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -     let HiddenStruct { one } = HiddenStruct::default();
-LL +     let HiddenStruct { one, two: _, .. } = HiddenStruct::default();
-   |
+LL |     let HiddenStruct { one, two: _, .. } = HiddenStruct::default();
+   |                           ++++++++++++
 help: or always ignore missing fields here
    |
-LL -     let HiddenStruct { one } = HiddenStruct::default();
-LL +     let HiddenStruct { one, .. } = HiddenStruct::default();
-   |
+LL |     let HiddenStruct { one, .. } = HiddenStruct::default();
+   |                           ++++
 
 error[E0027]: pattern does not mention field `two`
   --> $DIR/doc-hidden-fields.rs:21:9
@@ -39,19 +36,16 @@ LL |     let HiddenStruct { one, hide } = HiddenStruct::default();
    |
 help: include the missing field in the pattern
    |
-LL -     let HiddenStruct { one, hide } = HiddenStruct::default();
-LL +     let HiddenStruct { one, hide, two } = HiddenStruct::default();
-   |
+LL |     let HiddenStruct { one, hide, two } = HiddenStruct::default();
+   |                                 +++++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -     let HiddenStruct { one, hide } = HiddenStruct::default();
-LL +     let HiddenStruct { one, hide, two: _ } = HiddenStruct::default();
-   |
+LL |     let HiddenStruct { one, hide, two: _ } = HiddenStruct::default();
+   |                                 ++++++++
 help: or always ignore missing fields here
    |
-LL -     let HiddenStruct { one, hide } = HiddenStruct::default();
-LL +     let HiddenStruct { one, hide, .. } = HiddenStruct::default();
-   |
+LL |     let HiddenStruct { one, hide, .. } = HiddenStruct::default();
+   |                                 ++++
 
 error[E0027]: pattern does not mention field `im_hidden`
   --> $DIR/doc-hidden-fields.rs:24:9
@@ -61,19 +55,16 @@ LL |     let InCrate { a, b } = InCrate { a: 0, b: false, im_hidden: 0 };
    |
 help: include the missing field in the pattern
    |
-LL -     let InCrate { a, b } = InCrate { a: 0, b: false, im_hidden: 0 };
-LL +     let InCrate { a, b, im_hidden } = InCrate { a: 0, b: false, im_hidden: 0 };
-   |
+LL |     let InCrate { a, b, im_hidden } = InCrate { a: 0, b: false, im_hidden: 0 };
+   |                       +++++++++++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -     let InCrate { a, b } = InCrate { a: 0, b: false, im_hidden: 0 };
-LL +     let InCrate { a, b, im_hidden: _ } = InCrate { a: 0, b: false, im_hidden: 0 };
-   |
+LL |     let InCrate { a, b, im_hidden: _ } = InCrate { a: 0, b: false, im_hidden: 0 };
+   |                       ++++++++++++++
 help: or always ignore missing fields here
    |
-LL -     let InCrate { a, b } = InCrate { a: 0, b: false, im_hidden: 0 };
-LL +     let InCrate { a, b, .. } = InCrate { a: 0, b: false, im_hidden: 0 };
-   |
+LL |     let InCrate { a, b, .. } = InCrate { a: 0, b: false, im_hidden: 0 };
+   |                       ++++
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/pattern/usefulness/stable-gated-fields.stderr b/tests/ui/pattern/usefulness/stable-gated-fields.stderr
index 7b44bc79acf..7c30b530d6d 100644
--- a/tests/ui/pattern/usefulness/stable-gated-fields.stderr
+++ b/tests/ui/pattern/usefulness/stable-gated-fields.stderr
@@ -6,19 +6,16 @@ LL |     let UnstableStruct { stable } = UnstableStruct::default();
    |
 help: include the missing field in the pattern and ignore the inaccessible fields
    |
-LL -     let UnstableStruct { stable } = UnstableStruct::default();
-LL +     let UnstableStruct { stable, stable2, .. } = UnstableStruct::default();
-   |
+LL |     let UnstableStruct { stable, stable2, .. } = UnstableStruct::default();
+   |                                +++++++++++++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -     let UnstableStruct { stable } = UnstableStruct::default();
-LL +     let UnstableStruct { stable, stable2: _, .. } = UnstableStruct::default();
-   |
+LL |     let UnstableStruct { stable, stable2: _, .. } = UnstableStruct::default();
+   |                                ++++++++++++++++
 help: or always ignore missing fields here
    |
-LL -     let UnstableStruct { stable } = UnstableStruct::default();
-LL +     let UnstableStruct { stable, .. } = UnstableStruct::default();
-   |
+LL |     let UnstableStruct { stable, .. } = UnstableStruct::default();
+   |                                ++++
 
 error: pattern requires `..` due to inaccessible fields
   --> $DIR/stable-gated-fields.rs:11:9
diff --git a/tests/ui/privacy/privacy5.stderr b/tests/ui/privacy/privacy5.stderr
index 8f28f629ba3..ec3abe9b816 100644
--- a/tests/ui/privacy/privacy5.stderr
+++ b/tests/ui/privacy/privacy5.stderr
@@ -52,9 +52,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `A` is private
   --> $DIR/privacy5.rs:56:12
@@ -262,9 +261,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `C` is private
   --> $DIR/privacy5.rs:69:12
@@ -282,9 +280,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `C` is private
   --> $DIR/privacy5.rs:70:12
@@ -302,9 +299,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `C` is private
   --> $DIR/privacy5.rs:71:12
@@ -322,9 +318,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `C` is private
   --> $DIR/privacy5.rs:72:18
@@ -342,9 +337,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `C` is private
   --> $DIR/privacy5.rs:73:18
@@ -362,9 +356,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `C` is private
   --> $DIR/privacy5.rs:74:18
@@ -382,9 +375,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `C` is private
   --> $DIR/privacy5.rs:75:18
@@ -402,9 +394,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `A` is private
   --> $DIR/privacy5.rs:83:17
@@ -460,9 +451,8 @@ LL |     pub struct C(pub isize, isize);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider making the fields publicly accessible
    |
-LL -     pub struct C(pub isize, isize);
-LL +     pub struct C(pub isize, pub isize);
-   |
+LL |     pub struct C(pub isize, pub isize);
+   |                             +++
 
 error[E0603]: tuple struct constructor `A` is private
   --> $DIR/privacy5.rs:90:20
diff --git a/tests/ui/privacy/suggest-box-new.stderr b/tests/ui/privacy/suggest-box-new.stderr
index da8405fd0e8..b651348de29 100644
--- a/tests/ui/privacy/suggest-box-new.stderr
+++ b/tests/ui/privacy/suggest-box-new.stderr
@@ -9,9 +9,8 @@ LL |     let _ = std::collections::HashMap();
    |
 help: you might have meant to use an associated function to build this type
    |
-LL -     let _ = std::collections::HashMap();
-LL +     let _ = std::collections::HashMap::new();
-   |
+LL |     let _ = std::collections::HashMap::new();
+   |                                      +++++
 LL -     let _ = std::collections::HashMap();
 LL +     let _ = std::collections::HashMap::with_capacity(_);
    |
@@ -23,9 +22,8 @@ LL +     let _ = std::collections::HashMap::with_capacity_and_hasher(_, _);
    |
 help: consider using the `Default` trait
    |
-LL -     let _ = std::collections::HashMap();
-LL +     let _ = <std::collections::HashMap as std::default::Default>::default();
-   |
+LL |     let _ = <std::collections::HashMap as std::default::Default>::default();
+   |             +                          ++++++++++++++++++++++++++++++++++
 
 error[E0423]: cannot initialize a tuple struct which contains private fields
   --> $DIR/suggest-box-new.rs:8:19
diff --git a/tests/ui/pub/pub-ident-fn-or-struct.stderr b/tests/ui/pub/pub-ident-fn-or-struct.stderr
index 1bdb547be1e..99c8e5754ef 100644
--- a/tests/ui/pub/pub-ident-fn-or-struct.stderr
+++ b/tests/ui/pub/pub-ident-fn-or-struct.stderr
@@ -6,9 +6,8 @@ LL | pub S (foo) bar
    |
 help: if you meant to call a macro, try
    |
-LL - pub S (foo) bar
-LL + pub S! (foo) bar
-   |
+LL | pub S! (foo) bar
+   |      +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/pub/pub-restricted.stderr b/tests/ui/pub/pub-restricted.stderr
index 35c48c6d769..6c913938bb8 100644
--- a/tests/ui/pub/pub-restricted.stderr
+++ b/tests/ui/pub/pub-restricted.stderr
@@ -10,9 +10,8 @@ LL | pub (a) fn afn() {}
            `pub(in path::to::module)`: visible only on the specified path
 help: make this visible only to module `a` with `in`
    |
-LL - pub (a) fn afn() {}
-LL + pub (in a) fn afn() {}
-   |
+LL | pub (in a) fn afn() {}
+   |      ++
 
 error[E0704]: incorrect visibility restriction
   --> $DIR/pub-restricted.rs:4:6
@@ -26,9 +25,8 @@ LL | pub (b) fn bfn() {}
            `pub(in path::to::module)`: visible only on the specified path
 help: make this visible only to module `b` with `in`
    |
-LL - pub (b) fn bfn() {}
-LL + pub (in b) fn bfn() {}
-   |
+LL | pub (in b) fn bfn() {}
+   |      ++
 
 error[E0704]: incorrect visibility restriction
   --> $DIR/pub-restricted.rs:5:6
@@ -42,9 +40,8 @@ LL | pub (crate::a) fn cfn() {}
            `pub(in path::to::module)`: visible only on the specified path
 help: make this visible only to module `crate::a` with `in`
    |
-LL - pub (crate::a) fn cfn() {}
-LL + pub (in crate::a) fn cfn() {}
-   |
+LL | pub (in crate::a) fn cfn() {}
+   |      ++
 
 error[E0704]: incorrect visibility restriction
   --> $DIR/pub-restricted.rs:22:14
@@ -58,9 +55,8 @@ LL |         pub (a) invalid: usize,
            `pub(in path::to::module)`: visible only on the specified path
 help: make this visible only to module `a` with `in`
    |
-LL -         pub (a) invalid: usize,
-LL +         pub (in a) invalid: usize,
-   |
+LL |         pub (in a) invalid: usize,
+   |              ++
 
 error[E0704]: incorrect visibility restriction
   --> $DIR/pub-restricted.rs:31:6
@@ -74,9 +70,8 @@ LL | pub (xyz) fn xyz() {}
            `pub(in path::to::module)`: visible only on the specified path
 help: make this visible only to module `xyz` with `in`
    |
-LL - pub (xyz) fn xyz() {}
-LL + pub (in xyz) fn xyz() {}
-   |
+LL | pub (in xyz) fn xyz() {}
+   |      ++
 
 error[E0742]: visibilities can only be restricted to ancestor modules
   --> $DIR/pub-restricted.rs:23:17
diff --git a/tests/ui/resolve/const-with-typo-in-pattern-binding.stderr b/tests/ui/resolve/const-with-typo-in-pattern-binding.stderr
index f142f91064f..ef641eb5681 100644
--- a/tests/ui/resolve/const-with-typo-in-pattern-binding.stderr
+++ b/tests/ui/resolve/const-with-typo-in-pattern-binding.stderr
@@ -73,9 +73,8 @@ LL |         _ => {}
    |
 help: you might have meant to pattern match against the value of constant `ARCH` instead of introducing a new catch-all binding
    |
-LL -         ARCH => {}
-LL +         std::env::consts::ARCH => {}
-   |
+LL |         std::env::consts::ARCH => {}
+   |         ++++++++++++++++++
 
 error: aborting due to 5 previous errors
 
diff --git a/tests/ui/resolve/issue-39226.stderr b/tests/ui/resolve/issue-39226.stderr
index 3d771b4fc42..1cd2a5fb221 100644
--- a/tests/ui/resolve/issue-39226.stderr
+++ b/tests/ui/resolve/issue-39226.stderr
@@ -9,9 +9,8 @@ LL |         handle: Handle
    |
 help: use struct literal syntax instead
    |
-LL -         handle: Handle
-LL +         handle: Handle {}
-   |
+LL |         handle: Handle {}
+   |                        ++
 help: a local variable with a similar name exists
    |
 LL -         handle: Handle
diff --git a/tests/ui/resolve/issue-55673.stderr b/tests/ui/resolve/issue-55673.stderr
index 30b1cd09085..2695868b771 100644
--- a/tests/ui/resolve/issue-55673.stderr
+++ b/tests/ui/resolve/issue-55673.stderr
@@ -18,9 +18,8 @@ LL |     T::Baa: std::fmt::Debug,
    |
 help: consider further restricting type parameter `T` with trait `Foo`
    |
-LL -     T::Baa: std::fmt::Debug,
-LL +     T::Baa: std::fmt::Debug, T: Foo
-   |
+LL |     T::Baa: std::fmt::Debug, T: Foo
+   |                              ++++++
 help: ...and changing the associated type name
    |
 LL -     T::Baa: std::fmt::Debug,
diff --git a/tests/ui/resolve/issue-73427.stderr b/tests/ui/resolve/issue-73427.stderr
index 890bb04f24d..fccbfe547cb 100644
--- a/tests/ui/resolve/issue-73427.stderr
+++ b/tests/ui/resolve/issue-73427.stderr
@@ -20,9 +20,8 @@ help: you might have meant to use one of the following enum variants
 LL -     A.foo();
 LL +     (A::Tuple()).foo();
    |
-LL -     A.foo();
-LL +     A::Unit.foo();
-   |
+LL |     A::Unit.foo();
+   |      ++++++
 help: alternatively, the following enum variant is available
    |
 LL -     A.foo();
@@ -61,9 +60,8 @@ LL | | }
    | |_^
 help: you might have meant to use the following enum variant
    |
-LL -     C.foo();
-LL +     C::Unit.foo();
-   |
+LL |     C::Unit.foo();
+   |      ++++++
 help: alternatively, the following enum variant is available
    |
 LL -     C.foo();
@@ -86,9 +84,8 @@ LL | | }
    | |_^
 help: you might have meant to use the following enum variant
    |
-LL -     D.foo();
-LL +     D::Unit.foo();
-   |
+LL |     D::Unit.foo();
+   |      ++++++
 help: alternatively, the following enum variant is available
    |
 LL -     D.foo();
@@ -144,12 +141,10 @@ LL | | }
    | |_^
 help: try to match against one of the enum's variants
    |
-LL -     if let A(3) = x { }
-LL +     if let A::Tuple(3) = x { }
-   |
-LL -     if let A(3) = x { }
-LL +     if let A::TupleWithFields(3) = x { }
-   |
+LL |     if let A::Tuple(3) = x { }
+   |             +++++++
+LL |     if let A::TupleWithFields(3) = x { }
+   |             +++++++++++++++++
 
 error[E0423]: expected function, tuple struct or tuple variant, found enum `A`
   --> $DIR/issue-73427.rs:46:13
@@ -171,12 +166,10 @@ LL | | }
    | |_^
 help: try to construct one of the enum's variants
    |
-LL -     let x = A(3);
-LL +     let x = A::Tuple(3);
-   |
-LL -     let x = A(3);
-LL +     let x = A::TupleWithFields(3);
-   |
+LL |     let x = A::Tuple(3);
+   |              +++++++
+LL |     let x = A::TupleWithFields(3);
+   |              +++++++++++++++++
 
 error: aborting due to 7 previous errors
 
diff --git a/tests/ui/resolve/privacy-enum-ctor.stderr b/tests/ui/resolve/privacy-enum-ctor.stderr
index 3bbab3716af..f349b9391d1 100644
--- a/tests/ui/resolve/privacy-enum-ctor.stderr
+++ b/tests/ui/resolve/privacy-enum-ctor.stderr
@@ -124,9 +124,8 @@ LL | |     }
    | |_____^
 help: you might have meant to use the following enum variant
    |
-LL -     let _: E = E;
-LL +     let _: E = E::Unit;
-   |
+LL |     let _: E = E::Unit;
+   |                 ++++++
 help: alternatively, the following enum variant is available
    |
 LL -     let _: E = E;
diff --git a/tests/ui/resolve/resolve-inconsistent-names.stderr b/tests/ui/resolve/resolve-inconsistent-names.stderr
index 3197e0b0894..5fac622eef2 100644
--- a/tests/ui/resolve/resolve-inconsistent-names.stderr
+++ b/tests/ui/resolve/resolve-inconsistent-names.stderr
@@ -34,9 +34,8 @@ LL |         (A, B) | (ref B, c) | (c, A) => ()
    |
 help: if you meant to match on unit variant `E::A`, use the full path in the pattern
    |
-LL -         (A, B) | (ref B, c) | (c, A) => ()
-LL +         (E::A, B) | (ref B, c) | (c, A) => ()
-   |
+LL |         (E::A, B) | (ref B, c) | (c, A) => ()
+   |          +++
 
 error[E0408]: variable `B` is not bound in all patterns
   --> $DIR/resolve-inconsistent-names.rs:19:31
@@ -65,9 +64,8 @@ LL |         (CONST1, _) | (_, Const2) => ()
    |
 help: if you meant to match on constant `m::Const2`, use the full path in the pattern
    |
-LL -         (CONST1, _) | (_, Const2) => ()
-LL +         (CONST1, _) | (_, m::Const2) => ()
-   |
+LL |         (CONST1, _) | (_, m::Const2) => ()
+   |                           +++
 
 error[E0408]: variable `CONST1` is not bound in all patterns
   --> $DIR/resolve-inconsistent-names.rs:31:23
diff --git a/tests/ui/resolve/resolve-issue-135614-assoc-const.import_trait_associated_functions.stderr b/tests/ui/resolve/resolve-issue-135614-assoc-const.import_trait_associated_functions.stderr
index 3d6d47578c3..366bc1bf03c 100644
--- a/tests/ui/resolve/resolve-issue-135614-assoc-const.import_trait_associated_functions.stderr
+++ b/tests/ui/resolve/resolve-issue-135614-assoc-const.import_trait_associated_functions.stderr
@@ -11,9 +11,8 @@ LL |     const DEFAULT: u32 = 0;
    = note: the matched value is of type `u32`
 help: introduce a variable instead
    |
-LL -     let DEFAULT: u32 = 0;
-LL +     let DEFAULT_var: u32 = 0;
-   |
+LL |     let DEFAULT_var: u32 = 0;
+   |                ++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/resolve/resolve-issue-135614-assoc-const.normal.stderr b/tests/ui/resolve/resolve-issue-135614-assoc-const.normal.stderr
index f041487da41..1392eb48f8c 100644
--- a/tests/ui/resolve/resolve-issue-135614-assoc-const.normal.stderr
+++ b/tests/ui/resolve/resolve-issue-135614-assoc-const.normal.stderr
@@ -21,9 +21,8 @@ LL |     const DEFAULT: u32 = 0;
    = note: the matched value is of type `u32`
 help: introduce a variable instead
    |
-LL -     let DEFAULT: u32 = 0;
-LL +     let DEFAULT_var: u32 = 0;
-   |
+LL |     let DEFAULT_var: u32 = 0;
+   |                ++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/resolve/typo-suggestion-for-variable-with-name-similar-to-struct-field.stderr b/tests/ui/resolve/typo-suggestion-for-variable-with-name-similar-to-struct-field.stderr
index 15fdb975a1b..5832cb69a3d 100644
--- a/tests/ui/resolve/typo-suggestion-for-variable-with-name-similar-to-struct-field.stderr
+++ b/tests/ui/resolve/typo-suggestion-for-variable-with-name-similar-to-struct-field.stderr
@@ -66,9 +66,8 @@ LL |         Self::BAR;
    |         ++++++
 help: a constant with a similar name exists
    |
-LL -         BAR;
-LL +         BARR;
-   |
+LL |         BARR;
+   |            +
 
 error[E0412]: cannot find type `Baz` in this scope
   --> $DIR/typo-suggestion-for-variable-with-name-similar-to-struct-field.rs:37:18
diff --git a/tests/ui/resolve/typo-suggestion-mistyped-in-path.stderr b/tests/ui/resolve/typo-suggestion-mistyped-in-path.stderr
index 1ea7f1d39cb..2d0d0d0f386 100644
--- a/tests/ui/resolve/typo-suggestion-mistyped-in-path.stderr
+++ b/tests/ui/resolve/typo-suggestion-mistyped-in-path.stderr
@@ -39,9 +39,8 @@ LL |     modul::foo();
    |
 help: there is a crate or module with a similar name
    |
-LL -     modul::foo();
-LL +     module::foo();
-   |
+LL |     module::foo();
+   |          +
 
 error[E0433]: failed to resolve: use of undeclared type `Trai`
   --> $DIR/typo-suggestion-mistyped-in-path.rs:39:5
diff --git a/tests/ui/rfcs/rfc-2008-non-exhaustive/struct.stderr b/tests/ui/rfcs/rfc-2008-non-exhaustive/struct.stderr
index d0244f39769..88411f29b16 100644
--- a/tests/ui/rfcs/rfc-2008-non-exhaustive/struct.stderr
+++ b/tests/ui/rfcs/rfc-2008-non-exhaustive/struct.stderr
@@ -58,9 +58,8 @@ LL |     let NormalStruct { first_field, second_field } = ns;
    |
 help: add `..` at the end of the field list to ignore all other fields
    |
-LL -     let NormalStruct { first_field, second_field } = ns;
-LL +     let NormalStruct { first_field, second_field , .. } = ns;
-   |
+LL |     let NormalStruct { first_field, second_field , .. } = ns;
+   |                                                  ++++
 
 error[E0423]: cannot initialize a tuple struct which contains private fields
   --> $DIR/struct.rs:20:14
@@ -76,9 +75,8 @@ LL |     let TupleStruct { 0: first_field, 1: second_field } = ts;
    |
 help: add `..` at the end of the field list to ignore all other fields
    |
-LL -     let TupleStruct { 0: first_field, 1: second_field } = ts;
-LL +     let TupleStruct { 0: first_field, 1: second_field , .. } = ts;
-   |
+LL |     let TupleStruct { 0: first_field, 1: second_field , .. } = ts;
+   |                                                       ++++
 
 error[E0638]: `..` required with struct marked as non-exhaustive
   --> $DIR/struct.rs:35:9
@@ -88,9 +86,8 @@ LL |     let UnitStruct { } = us;
    |
 help: add `..` at the end of the field list to ignore all other fields
    |
-LL -     let UnitStruct { } = us;
-LL +     let UnitStruct { .. } = us;
-   |
+LL |     let UnitStruct { .. } = us;
+   |                      ++
 
 error: aborting due to 9 previous errors
 
diff --git a/tests/ui/rfcs/rfc-2008-non-exhaustive/variant.stderr b/tests/ui/rfcs/rfc-2008-non-exhaustive/variant.stderr
index 4cabd5a8140..dcecd53d38a 100644
--- a/tests/ui/rfcs/rfc-2008-non-exhaustive/variant.stderr
+++ b/tests/ui/rfcs/rfc-2008-non-exhaustive/variant.stderr
@@ -82,9 +82,8 @@ LL |         NonExhaustiveVariants::Struct { field } => ""
    |
 help: add `..` at the end of the field list to ignore all other fields
    |
-LL -         NonExhaustiveVariants::Struct { field } => ""
-LL +         NonExhaustiveVariants::Struct { field , .. } => ""
-   |
+LL |         NonExhaustiveVariants::Struct { field , .. } => ""
+   |                                               ++++
 
 error[E0638]: `..` required with variant marked as non-exhaustive
   --> $DIR/variant.rs:30:12
@@ -94,9 +93,8 @@ LL |     if let NonExhaustiveVariants::Struct { field } = variant_struct {
    |
 help: add `..` at the end of the field list to ignore all other fields
    |
-LL -     if let NonExhaustiveVariants::Struct { field } = variant_struct {
-LL +     if let NonExhaustiveVariants::Struct { field , .. } = variant_struct {
-   |
+LL |     if let NonExhaustiveVariants::Struct { field , .. } = variant_struct {
+   |                                                  ++++
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.stderr b/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.stderr
index 37a0f2bcaa8..38360e06cbe 100644
--- a/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.stderr
+++ b/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.stderr
@@ -6,9 +6,8 @@ LL | use alloc;
    |
 help: consider importing this module instead
    |
-LL - use alloc;
-LL + use std::alloc;
-   |
+LL | use std::alloc;
+   |     +++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/rust-2018/trait-import-suggestions.stderr b/tests/ui/rust-2018/trait-import-suggestions.stderr
index 077b4a6cf2f..488044ee852 100644
--- a/tests/ui/rust-2018/trait-import-suggestions.stderr
+++ b/tests/ui/rust-2018/trait-import-suggestions.stderr
@@ -34,9 +34,8 @@ LL + use crate::foo::Bar;
    |
 help: there is a method `foobar` with a similar name
    |
-LL -     x.bar();
-LL +     x.foobar();
-   |
+LL |     x.foobar();
+   |       +++
 
 error[E0599]: no method named `baz` found for type `u32` in the current scope
   --> $DIR/trait-import-suggestions.rs:29:7
diff --git a/tests/ui/specialization/fuzzed/fuzzing-ice-134905.rs b/tests/ui/specialization/fuzzed/fuzzing-ice-134905.rs
new file mode 100644
index 00000000000..559c2345527
--- /dev/null
+++ b/tests/ui/specialization/fuzzed/fuzzing-ice-134905.rs
@@ -0,0 +1,22 @@
+// This test previously tried to use a tainted `EvalCtxt` when emitting
+// an error during coherence.
+#![feature(specialization)]
+//~^ WARN the feature `specialization` is incomplete
+trait Iterate<'a> {
+    type Ty: Valid;
+}
+impl<'a, T> Iterate<'a> for T
+where
+    T: Check,
+{
+    default type Ty = ();
+    //~^ ERROR the trait bound `(): Valid` is not satisfied
+}
+
+trait Check {}
+impl<'a, T> Eq for T where <T as Iterate<'a>>::Ty: Valid {}
+//~^ ERROR type parameter `T` must be used as the type parameter for some local type
+
+trait Valid {}
+
+fn main() {}
diff --git a/tests/ui/specialization/fuzzed/fuzzing-ice-134905.stderr b/tests/ui/specialization/fuzzed/fuzzing-ice-134905.stderr
new file mode 100644
index 00000000000..611fef1df66
--- /dev/null
+++ b/tests/ui/specialization/fuzzed/fuzzing-ice-134905.stderr
@@ -0,0 +1,40 @@
+warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
+  --> $DIR/fuzzing-ice-134905.rs:3:12
+   |
+LL | #![feature(specialization)]
+   |            ^^^^^^^^^^^^^^
+   |
+   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
+   = help: consider using `min_specialization` instead, which is more stable and complete
+   = note: `#[warn(incomplete_features)]` on by default
+
+error[E0277]: the trait bound `(): Valid` is not satisfied
+  --> $DIR/fuzzing-ice-134905.rs:12:23
+   |
+LL |     default type Ty = ();
+   |                       ^^ the trait `Valid` is not implemented for `()`
+   |
+help: this trait has no implementations, consider adding one
+  --> $DIR/fuzzing-ice-134905.rs:20:1
+   |
+LL | trait Valid {}
+   | ^^^^^^^^^^^
+note: required by a bound in `Iterate::Ty`
+  --> $DIR/fuzzing-ice-134905.rs:6:14
+   |
+LL |     type Ty: Valid;
+   |              ^^^^^ required by this bound in `Iterate::Ty`
+
+error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g., `MyStruct<T>`)
+  --> $DIR/fuzzing-ice-134905.rs:17:10
+   |
+LL | impl<'a, T> Eq for T where <T as Iterate<'a>>::Ty: Valid {}
+   |          ^ type parameter `T` must be used as the type parameter for some local type
+   |
+   = note: implementing a foreign trait is only possible if at least one of the types for which it is implemented is local
+   = note: only traits defined in the current crate can be implemented for a type parameter
+
+error: aborting due to 2 previous errors; 1 warning emitted
+
+Some errors have detailed explanations: E0210, E0277.
+For more information about an error, try `rustc --explain E0210`.
diff --git a/tests/ui/stability-attribute/const-stability-attribute-implies-using-stable.stderr b/tests/ui/stability-attribute/const-stability-attribute-implies-using-stable.stderr
index 4cbd93d17cf..34bf1c6c10a 100644
--- a/tests/ui/stability-attribute/const-stability-attribute-implies-using-stable.stderr
+++ b/tests/ui/stability-attribute/const-stability-attribute-implies-using-stable.stderr
@@ -11,9 +11,8 @@ LL | #![deny(stable_features)]
    |         ^^^^^^^^^^^^^^^
 help: if you are using features which are still unstable, change to using `const_foobar`
    |
-LL - #![feature(const_foo)]
-LL + #![feature(const_foobar)]
-   |
+LL | #![feature(const_foobar)]
+   |                     +++
 help: if you are using features which are now stable, remove this line
    |
 LL - #![feature(const_foo)]
diff --git a/tests/ui/stability-attribute/const-stability-attribute-implies-using-unstable.stderr b/tests/ui/stability-attribute/const-stability-attribute-implies-using-unstable.stderr
index 38331919ee8..095c37fd0b6 100644
--- a/tests/ui/stability-attribute/const-stability-attribute-implies-using-unstable.stderr
+++ b/tests/ui/stability-attribute/const-stability-attribute-implies-using-unstable.stderr
@@ -11,9 +11,8 @@ LL | #![deny(stable_features)]
    |         ^^^^^^^^^^^^^^^
 help: if you are using features which are still unstable, change to using `const_foobar`
    |
-LL - #![feature(const_foo)]
-LL + #![feature(const_foobar)]
-   |
+LL | #![feature(const_foobar)]
+   |                     +++
 help: if you are using features which are now stable, remove this line
    |
 LL - #![feature(const_foo)]
diff --git a/tests/ui/stability-attribute/stability-attribute-implies-using-stable.stderr b/tests/ui/stability-attribute/stability-attribute-implies-using-stable.stderr
index 1080b977410..86cb764a4b3 100644
--- a/tests/ui/stability-attribute/stability-attribute-implies-using-stable.stderr
+++ b/tests/ui/stability-attribute/stability-attribute-implies-using-stable.stderr
@@ -11,9 +11,8 @@ LL | #![deny(stable_features)]
    |         ^^^^^^^^^^^^^^^
 help: if you are using features which are still unstable, change to using `foobar`
    |
-LL - #![feature(foo)]
-LL + #![feature(foobar)]
-   |
+LL | #![feature(foobar)]
+   |               +++
 help: if you are using features which are now stable, remove this line
    |
 LL - #![feature(foo)]
diff --git a/tests/ui/stability-attribute/stability-attribute-implies-using-unstable.stderr b/tests/ui/stability-attribute/stability-attribute-implies-using-unstable.stderr
index 02cb25633ab..2537646eb98 100644
--- a/tests/ui/stability-attribute/stability-attribute-implies-using-unstable.stderr
+++ b/tests/ui/stability-attribute/stability-attribute-implies-using-unstable.stderr
@@ -11,9 +11,8 @@ LL | #![deny(stable_features)]
    |         ^^^^^^^^^^^^^^^
 help: if you are using features which are still unstable, change to using `foobar`
    |
-LL - #![feature(foo)]
-LL + #![feature(foobar)]
-   |
+LL | #![feature(foobar)]
+   |               +++
 help: if you are using features which are now stable, remove this line
    |
 LL - #![feature(foo)]
diff --git a/tests/ui/statics/issue-15261.stderr b/tests/ui/statics/issue-15261.stderr
index 7edd79e08b1..7e6aebcbb1f 100644
--- a/tests/ui/statics/issue-15261.stderr
+++ b/tests/ui/statics/issue-15261.stderr
@@ -9,9 +9,8 @@ LL | static n: &'static usize = unsafe { &n_mut };
    = note: `#[warn(static_mut_refs)]` on by default
 help: use `&raw const` instead to create a raw pointer
    |
-LL - static n: &'static usize = unsafe { &n_mut };
-LL + static n: &'static usize = unsafe { &raw const n_mut };
-   |
+LL | static n: &'static usize = unsafe { &raw const n_mut };
+   |                                      +++++++++
 
 warning: 1 warning emitted
 
diff --git a/tests/ui/statics/static-mut-shared-parens.stderr b/tests/ui/statics/static-mut-shared-parens.stderr
index f428f9a18d4..3d4b55909cd 100644
--- a/tests/ui/statics/static-mut-shared-parens.stderr
+++ b/tests/ui/statics/static-mut-shared-parens.stderr
@@ -9,9 +9,8 @@ LL |     let _ = unsafe { (&TEST) as *const usize };
    = note: `#[warn(static_mut_refs)]` on by default
 help: use `&raw const` instead to create a raw pointer
    |
-LL -     let _ = unsafe { (&TEST) as *const usize };
-LL +     let _ = unsafe { (&raw const TEST) as *const usize };
-   |
+LL |     let _ = unsafe { (&raw const TEST) as *const usize };
+   |                        +++++++++
 
 warning: creating a mutable reference to mutable static is discouraged
   --> $DIR/static-mut-shared-parens.rs:11:22
diff --git a/tests/ui/statics/static-mut-xc.stderr b/tests/ui/statics/static-mut-xc.stderr
index d03835c30d8..48cac28a6eb 100644
--- a/tests/ui/statics/static-mut-xc.stderr
+++ b/tests/ui/statics/static-mut-xc.stderr
@@ -54,9 +54,8 @@ LL |     static_bound(&static_mut_xc::a);
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
 help: use `&raw const` instead to create a raw pointer
    |
-LL -     static_bound(&static_mut_xc::a);
-LL +     static_bound(&raw const static_mut_xc::a);
-   |
+LL |     static_bound(&raw const static_mut_xc::a);
+   |                   +++++++++
 
 warning: creating a mutable reference to mutable static is discouraged
   --> $DIR/static-mut-xc.rs:35:22
diff --git a/tests/ui/statics/static-recursive.stderr b/tests/ui/statics/static-recursive.stderr
index 8ea997fa214..039934dfc69 100644
--- a/tests/ui/statics/static-recursive.stderr
+++ b/tests/ui/statics/static-recursive.stderr
@@ -9,9 +9,8 @@ LL | static mut S: *const u8 = unsafe { &S as *const *const u8 as *const u8 };
    = note: `#[warn(static_mut_refs)]` on by default
 help: use `&raw const` instead to create a raw pointer
    |
-LL - static mut S: *const u8 = unsafe { &S as *const *const u8 as *const u8 };
-LL + static mut S: *const u8 = unsafe { &raw const S as *const *const u8 as *const u8 };
-   |
+LL | static mut S: *const u8 = unsafe { &raw const S as *const *const u8 as *const u8 };
+   |                                     +++++++++
 
 warning: creating a shared reference to mutable static is discouraged
   --> $DIR/static-recursive.rs:19:20
diff --git a/tests/ui/structs-enums/multiple-reprs.rs b/tests/ui/structs-enums/multiple-reprs.rs
index 1528db126ae..ce50b62ce47 100644
--- a/tests/ui/structs-enums/multiple-reprs.rs
+++ b/tests/ui/structs-enums/multiple-reprs.rs
@@ -69,7 +69,7 @@ pub fn main() {
     assert_eq!(size_of::<E4>(), 8);
     assert_eq!(size_of::<E5>(), align_size(10, align_of::<u32>()));
     assert_eq!(size_of::<E6>(), align_size(14, align_of::<u64>()));
-    assert_eq!(size_of::<E7>(), align_size(6 + size_of::<c_int>(), align_of::<c_int>()));
+    assert_eq!(size_of::<E7>(), align_size(6 + c_enum_min_size(), align_of::<c_int>()));
     assert_eq!(size_of::<p0f_api_query>(), 21);
 }
 
@@ -80,3 +80,13 @@ fn align_size(size: usize, align: usize) -> usize {
         size
     }
 }
+
+// this is `TargetOptions.c_enum_min_bits` which is not available as a `cfg` value so we retrieve
+// the value at runtime. On most targets this is `sizeof(c_int)` but on `thumb*-none` is 1 byte
+fn c_enum_min_size() -> usize {
+    #[repr(C)]
+    enum E {
+        A,
+    }
+    size_of::<E>()
+}
diff --git a/tests/ui/structs/struct-fields-hints-no-dupe.stderr b/tests/ui/structs/struct-fields-hints-no-dupe.stderr
index 650f6ddfa88..aeba7f00b9d 100644
--- a/tests/ui/structs/struct-fields-hints-no-dupe.stderr
+++ b/tests/ui/structs/struct-fields-hints-no-dupe.stderr
@@ -6,9 +6,8 @@ LL |         bar : 42,
    |
 help: a field with a similar name exists
    |
-LL -         bar : 42,
-LL +         barr : 42,
-   |
+LL |         barr : 42,
+   |            +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/structs/struct-pat-derived-error.stderr b/tests/ui/structs/struct-pat-derived-error.stderr
index a086de08983..7fceb95cc5d 100644
--- a/tests/ui/structs/struct-pat-derived-error.stderr
+++ b/tests/ui/structs/struct-pat-derived-error.stderr
@@ -24,19 +24,16 @@ LL |         let A { x, y } = self.d;
    |
 help: include the missing fields in the pattern
    |
-LL -         let A { x, y } = self.d;
-LL +         let A { x, y, b, c } = self.d;
-   |
+LL |         let A { x, y, b, c } = self.d;
+   |                     ++++++
 help: if you don't care about these missing fields, you can explicitly ignore them
    |
-LL -         let A { x, y } = self.d;
-LL +         let A { x, y, b: _, c: _ } = self.d;
-   |
+LL |         let A { x, y, b: _, c: _ } = self.d;
+   |                     ++++++++++++
 help: or always ignore missing fields here
    |
-LL -         let A { x, y } = self.d;
-LL +         let A { x, y, .. } = self.d;
-   |
+LL |         let A { x, y, .. } = self.d;
+   |                     ++++
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/structs/struct-tuple-field-names.stderr b/tests/ui/structs/struct-tuple-field-names.stderr
index 7692010aa54..953f01e1fb6 100644
--- a/tests/ui/structs/struct-tuple-field-names.stderr
+++ b/tests/ui/structs/struct-tuple-field-names.stderr
@@ -30,19 +30,16 @@ LL |     if let E::S { 0: a } = x {
    |
 help: include the missing field in the pattern
    |
-LL -     if let E::S { 0: a } = x {
-LL +     if let E::S { 0: a, 1: _ } = x {
-   |
+LL |     if let E::S { 0: a, 1: _ } = x {
+   |                       ++++++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -     if let E::S { 0: a } = x {
-LL +     if let E::S { 0: a, 1: _ } = x {
-   |
+LL |     if let E::S { 0: a, 1: _ } = x {
+   |                       ++++++
 help: or always ignore missing fields here
    |
-LL -     if let E::S { 0: a } = x {
-LL +     if let E::S { 0: a, .. } = x {
-   |
+LL |     if let E::S { 0: a, .. } = x {
+   |                       ++++
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/structs/suggest-replacing-field-when-specifying-same-type.stderr b/tests/ui/structs/suggest-replacing-field-when-specifying-same-type.stderr
index befc6a1b538..3a828e95577 100644
--- a/tests/ui/structs/suggest-replacing-field-when-specifying-same-type.stderr
+++ b/tests/ui/structs/suggest-replacing-field-when-specifying-same-type.stderr
@@ -15,19 +15,16 @@ LL |         Foo::Bar { a, aa: 1, c } => (),
    |
 help: include the missing field in the pattern
    |
-LL -         Foo::Bar { a, aa: 1, c } => (),
-LL +         Foo::Bar { a, aa: 1, c, b } => (),
-   |
+LL |         Foo::Bar { a, aa: 1, c, b } => (),
+   |                               +++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -         Foo::Bar { a, aa: 1, c } => (),
-LL +         Foo::Bar { a, aa: 1, c, b: _ } => (),
-   |
+LL |         Foo::Bar { a, aa: 1, c, b: _ } => (),
+   |                               ++++++
 help: or always ignore missing fields here
    |
-LL -         Foo::Bar { a, aa: 1, c } => (),
-LL +         Foo::Bar { a, aa: 1, c, .. } => (),
-   |
+LL |         Foo::Bar { a, aa: 1, c, .. } => (),
+   |                               ++++
 
 error[E0026]: variant `Foo::Baz` does not have a field named `bb`
   --> $DIR/suggest-replacing-field-when-specifying-same-type.rs:13:20
@@ -46,19 +43,16 @@ LL |         Foo::Baz { bb: 1.0 } => (),
    |
 help: include the missing field in the pattern
    |
-LL -         Foo::Baz { bb: 1.0 } => (),
-LL +         Foo::Baz { bb: 1.0, a } => (),
-   |
+LL |         Foo::Baz { bb: 1.0, a } => (),
+   |                           +++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -         Foo::Baz { bb: 1.0 } => (),
-LL +         Foo::Baz { bb: 1.0, a: _ } => (),
-   |
+LL |         Foo::Baz { bb: 1.0, a: _ } => (),
+   |                           ++++++
 help: or always ignore missing fields here
    |
-LL -         Foo::Baz { bb: 1.0 } => (),
-LL +         Foo::Baz { bb: 1.0, .. } => (),
-   |
+LL |         Foo::Baz { bb: 1.0, .. } => (),
+   |                           ++++
 
 error[E0026]: variant `Foo::Bar` does not have a field named `aa`
   --> $DIR/suggest-replacing-field-when-specifying-same-type.rs:20:23
@@ -74,19 +68,16 @@ LL |         Foo::Bar { a, aa: "", c } => (),
    |
 help: include the missing field in the pattern
    |
-LL -         Foo::Bar { a, aa: "", c } => (),
-LL +         Foo::Bar { a, aa: "", c, b } => (),
-   |
+LL |         Foo::Bar { a, aa: "", c, b } => (),
+   |                                +++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -         Foo::Bar { a, aa: "", c } => (),
-LL +         Foo::Bar { a, aa: "", c, b: _ } => (),
-   |
+LL |         Foo::Bar { a, aa: "", c, b: _ } => (),
+   |                                ++++++
 help: or always ignore missing fields here
    |
-LL -         Foo::Bar { a, aa: "", c } => (),
-LL +         Foo::Bar { a, aa: "", c, .. } => (),
-   |
+LL |         Foo::Bar { a, aa: "", c, .. } => (),
+   |                                ++++
 
 error[E0026]: variant `Foo::Baz` does not have a field named `bb`
   --> $DIR/suggest-replacing-field-when-specifying-same-type.rs:23:20
@@ -102,19 +93,16 @@ LL |         Foo::Baz { bb: "" } => (),
    |
 help: include the missing field in the pattern
    |
-LL -         Foo::Baz { bb: "" } => (),
-LL +         Foo::Baz { bb: "", a } => (),
-   |
+LL |         Foo::Baz { bb: "", a } => (),
+   |                          +++
 help: if you don't care about this missing field, you can explicitly ignore it
    |
-LL -         Foo::Baz { bb: "" } => (),
-LL +         Foo::Baz { bb: "", a: _ } => (),
-   |
+LL |         Foo::Baz { bb: "", a: _ } => (),
+   |                          ++++++
 help: or always ignore missing fields here
    |
-LL -         Foo::Baz { bb: "" } => (),
-LL +         Foo::Baz { bb: "", .. } => (),
-   |
+LL |         Foo::Baz { bb: "", .. } => (),
+   |                          ++++
 
 error: aborting due to 8 previous errors
 
diff --git a/tests/ui/suggestions/bound-suggestions.stderr b/tests/ui/suggestions/bound-suggestions.stderr
index 51a6a51e7da..f23e086afe4 100644
--- a/tests/ui/suggestions/bound-suggestions.stderr
+++ b/tests/ui/suggestions/bound-suggestions.stderr
@@ -43,9 +43,8 @@ LL |     println!("{:?} {:?}", x, y);
    = note: this error 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)
 help: consider further restricting type parameter `Y` with trait `Debug`
    |
-LL - fn test_no_bounds_where<X, Y>(x: X, y: Y) where X: std::fmt::Debug, {
-LL + fn test_no_bounds_where<X, Y>(x: X, y: Y) where X: std::fmt::Debug, Y: std::fmt::Debug {
-   |
+LL | fn test_no_bounds_where<X, Y>(x: X, y: Y) where X: std::fmt::Debug, Y: std::fmt::Debug {
+   |                                                                     ++++++++++++++++++
 
 error[E0277]: `X` doesn't implement `Debug`
   --> $DIR/bound-suggestions.rs:33:22
diff --git a/tests/ui/suggestions/const-pat-non-exaustive-let-new-var.stderr b/tests/ui/suggestions/const-pat-non-exaustive-let-new-var.stderr
index 55a353c40ca..0dc17f2c25c 100644
--- a/tests/ui/suggestions/const-pat-non-exaustive-let-new-var.stderr
+++ b/tests/ui/suggestions/const-pat-non-exaustive-let-new-var.stderr
@@ -12,9 +12,8 @@ LL |     const A: i32 = 2;
    = note: the matched value is of type `i32`
 help: introduce a variable instead
    |
-LL -     let A = 3;
-LL +     let A_var = 3;
-   |
+LL |     let A_var = 3;
+   |          ++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/suggestions/crate-or-module-typo.stderr b/tests/ui/suggestions/crate-or-module-typo.stderr
index 0ca0582105b..2ec4fc7ed6c 100644
--- a/tests/ui/suggestions/crate-or-module-typo.stderr
+++ b/tests/ui/suggestions/crate-or-module-typo.stderr
@@ -6,9 +6,8 @@ LL | use st::cell::Cell;
    |
 help: there is a crate or module with a similar name
    |
-LL - use st::cell::Cell;
-LL + use std::cell::Cell;
-   |
+LL | use std::cell::Cell;
+   |       +
 
 error[E0432]: unresolved import `bas`
   --> $DIR/crate-or-module-typo.rs:11:5
@@ -30,9 +29,8 @@ LL |     bar: st::cell::Cell<bool>
    |
 help: there is a crate or module with a similar name
    |
-LL -     bar: st::cell::Cell<bool>
-LL +     bar: std::cell::Cell<bool>
-   |
+LL |     bar: std::cell::Cell<bool>
+   |            +
 help: consider importing this module
    |
 LL + use std::cell;
diff --git a/tests/ui/suggestions/dyn-incompatible-trait-should-use-where-sized.stderr b/tests/ui/suggestions/dyn-incompatible-trait-should-use-where-sized.stderr
index ac93c5df05e..c275cdccaa8 100644
--- a/tests/ui/suggestions/dyn-incompatible-trait-should-use-where-sized.stderr
+++ b/tests/ui/suggestions/dyn-incompatible-trait-should-use-where-sized.stderr
@@ -20,9 +20,8 @@ LL |     fn foo(&self) where Self: Other, { }
    |            +++++
 help: alternatively, consider constraining `foo` so it does not apply to trait objects
    |
-LL -     fn foo() where Self: Other, { }
-LL +     fn foo() where Self: Other, Self: Sized { }
-   |
+LL |     fn foo() where Self: Other, Self: Sized { }
+   |                                 +++++++++++
 help: consider changing method `bar`'s `self` parameter to be `&self`
    |
 LL -     fn bar(self: ()) {}
diff --git a/tests/ui/suggestions/field-access.stderr b/tests/ui/suggestions/field-access.stderr
index 4696950930f..362dae172c7 100644
--- a/tests/ui/suggestions/field-access.stderr
+++ b/tests/ui/suggestions/field-access.stderr
@@ -11,9 +11,8 @@ LL |     if let B::Fst = a {};
    |
 help: you might have meant to use field `b` whose type is `B`
    |
-LL -     if let B::Fst = a {};
-LL +     if let B::Fst = a.b {};
-   |
+LL |     if let B::Fst = a.b {};
+   |                      ++
 
 error[E0308]: mismatched types
   --> $DIR/field-access.rs:25:9
@@ -29,9 +28,8 @@ LL |         B::Fst => (),
    |
 help: you might have meant to use field `b` whose type is `B`
    |
-LL -     match a {
-LL +     match a.b {
-   |
+LL |     match a.b {
+   |            ++
 
 error[E0308]: mismatched types
   --> $DIR/field-access.rs:26:9
@@ -47,9 +45,8 @@ LL |         B::Snd => (),
    |
 help: you might have meant to use field `b` whose type is `B`
    |
-LL -     match a {
-LL +     match a.b {
-   |
+LL |     match a.b {
+   |            ++
 
 error[E0308]: mismatched types
   --> $DIR/field-access.rs:32:9
diff --git a/tests/ui/suggestions/imm-ref-trait-object-literal.stderr b/tests/ui/suggestions/imm-ref-trait-object-literal.stderr
index 90dee9005ab..4b770d572c5 100644
--- a/tests/ui/suggestions/imm-ref-trait-object-literal.stderr
+++ b/tests/ui/suggestions/imm-ref-trait-object-literal.stderr
@@ -14,9 +14,8 @@ LL | fn foo<X: Trait>(_: X) {}
    |           ^^^^^ required by this bound in `foo`
 help: consider changing this borrow's mutability
    |
-LL -   foo(&s);
-LL +   foo(&mut s);
-   |
+LL |   foo(&mut s);
+   |        +++
 
 error[E0277]: the trait bound `S: Trait` is not satisfied
   --> $DIR/imm-ref-trait-object-literal.rs:13:7
diff --git a/tests/ui/suggestions/impl-trait-missing-lifetime-gated.stderr b/tests/ui/suggestions/impl-trait-missing-lifetime-gated.stderr
index 299cf1d74d5..204209179ad 100644
--- a/tests/ui/suggestions/impl-trait-missing-lifetime-gated.stderr
+++ b/tests/ui/suggestions/impl-trait-missing-lifetime-gated.stderr
@@ -11,9 +11,8 @@ LL |     fn g(mut x: impl Iterator<Item = &()>) -> Option<&'static ()> { x.next(
    |                                                       +++++++
 help: consider introducing a named lifetime parameter
    |
-LL -     fn g(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
-LL +     fn g<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'a ()> { x.next() }
-   |
+LL |     fn g<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'a ()> { x.next() }
+   |         ++++                              ++                 ++
 help: alternatively, you might want to return an owned value
    |
 LL -     fn g(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
@@ -33,9 +32,8 @@ LL |     async fn i(mut x: impl Iterator<Item = &()>) -> Option<&'static ()> { x
    |                                                             +++++++
 help: consider introducing a named lifetime parameter
    |
-LL -     async fn i(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
-LL +     async fn i<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'a ()> { x.next() }
-   |
+LL |     async fn i<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'a ()> { x.next() }
+   |               ++++                              ++                 ++
 help: alternatively, you might want to return an owned value
    |
 LL -     async fn i(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
@@ -101,9 +99,8 @@ LL |     fn g(mut x: impl Foo) -> Option<&'static ()> { x.next() }
    |                                      +++++++
 help: consider introducing a named lifetime parameter
    |
-LL -     fn g(mut x: impl Foo) -> Option<&()> { x.next() }
-LL +     fn g<'a>(mut x: impl Foo) -> Option<&'a ()> { x.next() }
-   |
+LL |     fn g<'a>(mut x: impl Foo) -> Option<&'a ()> { x.next() }
+   |         ++++                             ++
 help: alternatively, you might want to return an owned value
    |
 LL -     fn g(mut x: impl Foo) -> Option<&()> { x.next() }
@@ -123,9 +120,8 @@ LL |     fn g(mut x: impl Foo<()>) -> Option<&'static ()> { x.next() }
    |                                          +++++++
 help: consider introducing a named lifetime parameter
    |
-LL -     fn g(mut x: impl Foo<()>) -> Option<&()> { x.next() }
-LL +     fn g<'a>(mut x: impl Foo<()>) -> Option<&'a ()> { x.next() }
-   |
+LL |     fn g<'a>(mut x: impl Foo<()>) -> Option<&'a ()> { x.next() }
+   |         ++++                                 ++
 help: alternatively, you might want to return an owned value
    |
 LL -     fn g(mut x: impl Foo<()>) -> Option<&()> { x.next() }
diff --git a/tests/ui/suggestions/let-binding-suggest-issue-133713.fixed b/tests/ui/suggestions/let-binding-suggest-issue-133713.fixed
new file mode 100644
index 00000000000..9f9c1d1bc5a
--- /dev/null
+++ b/tests/ui/suggestions/let-binding-suggest-issue-133713.fixed
@@ -0,0 +1,12 @@
+//@ run-rustfix
+#![allow(dead_code)]
+
+fn demo1() {
+    let _last: u64 = 0; //~ ERROR expected value, found builtin type `u64`
+}
+
+fn demo2() {
+    let _val: u64; //~ ERROR expected value, found builtin type `u64`
+}
+
+fn main() {}
diff --git a/tests/ui/suggestions/let-binding-suggest-issue-133713.rs b/tests/ui/suggestions/let-binding-suggest-issue-133713.rs
new file mode 100644
index 00000000000..ae218237a8d
--- /dev/null
+++ b/tests/ui/suggestions/let-binding-suggest-issue-133713.rs
@@ -0,0 +1,12 @@
+//@ run-rustfix
+#![allow(dead_code)]
+
+fn demo1() {
+    let _last = u64 = 0; //~ ERROR expected value, found builtin type `u64`
+}
+
+fn demo2() {
+    let _val = u64; //~ ERROR expected value, found builtin type `u64`
+}
+
+fn main() {}
diff --git a/tests/ui/suggestions/let-binding-suggest-issue-133713.stderr b/tests/ui/suggestions/let-binding-suggest-issue-133713.stderr
new file mode 100644
index 00000000000..185ad9c928b
--- /dev/null
+++ b/tests/ui/suggestions/let-binding-suggest-issue-133713.stderr
@@ -0,0 +1,27 @@
+error[E0423]: expected value, found builtin type `u64`
+  --> $DIR/let-binding-suggest-issue-133713.rs:5:17
+   |
+LL |     let _last = u64 = 0;
+   |                 ^^^
+   |
+help: you might have meant to use `:` for type annotation
+   |
+LL -     let _last = u64 = 0;
+LL +     let _last: u64 = 0;
+   |
+
+error[E0423]: expected value, found builtin type `u64`
+  --> $DIR/let-binding-suggest-issue-133713.rs:9:16
+   |
+LL |     let _val = u64;
+   |                ^^^
+   |
+help: you might have meant to use `:` for type annotation
+   |
+LL -     let _val = u64;
+LL +     let _val: u64;
+   |
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0423`.
diff --git a/tests/ui/suggestions/recover-missing-turbofish-surrounding-angle-braket.stderr b/tests/ui/suggestions/recover-missing-turbofish-surrounding-angle-braket.stderr
index 06f465e9c0d..d43d1f9bb7e 100644
--- a/tests/ui/suggestions/recover-missing-turbofish-surrounding-angle-braket.stderr
+++ b/tests/ui/suggestions/recover-missing-turbofish-surrounding-angle-braket.stderr
@@ -41,9 +41,8 @@ LL |     let _ = vec![1, 2, 3].into_iter().collect::Vec<_>>();
    |
 help: surround the type parameters with angle brackets
    |
-LL -     let _ = vec![1, 2, 3].into_iter().collect::Vec<_>>();
-LL +     let _ = vec![1, 2, 3].into_iter().collect::<Vec<_>>();
-   |
+LL |     let _ = vec![1, 2, 3].into_iter().collect::<Vec<_>>();
+   |                                                +
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/suggestions/struct-field-type-including-single-colon.stderr b/tests/ui/suggestions/struct-field-type-including-single-colon.stderr
index 247454b8710..5ffc5b40849 100644
--- a/tests/ui/suggestions/struct-field-type-including-single-colon.stderr
+++ b/tests/ui/suggestions/struct-field-type-including-single-colon.stderr
@@ -6,9 +6,8 @@ LL |     a: foo:A,
    |
 help: write a path separator here
    |
-LL -     a: foo:A,
-LL +     a: foo::A,
-   |
+LL |     a: foo::A,
+   |            +
 
 error: expected `,`, or `}`, found `:`
   --> $DIR/struct-field-type-including-single-colon.rs:9:11
@@ -26,9 +25,8 @@ LL |     b: foo::bar:B,
    |
 help: write a path separator here
    |
-LL -     b: foo::bar:B,
-LL +     b: foo::bar::B,
-   |
+LL |     b: foo::bar::B,
+   |                 +
 
 error: expected `,`, or `}`, found `:`
   --> $DIR/struct-field-type-including-single-colon.rs:15:16
diff --git a/tests/ui/suggestions/suggest-change-mut.stderr b/tests/ui/suggestions/suggest-change-mut.stderr
index 5315456efea..c47ae433ab8 100644
--- a/tests/ui/suggestions/suggest-change-mut.stderr
+++ b/tests/ui/suggestions/suggest-change-mut.stderr
@@ -19,9 +19,8 @@ LL | fn issue_81421<T: Read + Write>(mut stream: T) where &T: std::io::Read {
    |                                                +++++++++++++++++++++++
 help: consider changing this borrow's mutability
    |
-LL -         let mut stream_reader = BufReader::new(&stream);
-LL +         let mut stream_reader = BufReader::new(&mut stream);
-   |
+LL |         let mut stream_reader = BufReader::new(&mut stream);
+   |                                                 +++
 
 error[E0599]: the method `read_until` exists for struct `BufReader<&T>`, but its trait bounds were not satisfied
   --> $DIR/suggest-change-mut.rs:16:23
diff --git a/tests/ui/suggestions/suggest-deref-in-match-issue-132784.stderr b/tests/ui/suggestions/suggest-deref-in-match-issue-132784.stderr
index 54c927b59d4..2061b3f122a 100644
--- a/tests/ui/suggestions/suggest-deref-in-match-issue-132784.stderr
+++ b/tests/ui/suggestions/suggest-deref-in-match-issue-132784.stderr
@@ -11,9 +11,8 @@ LL |         Some(_) => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match x {
-LL +     match *x {
-   |
+LL |     match *x {
+   |           +
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:9:9
@@ -28,9 +27,8 @@ LL |         None => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match x {
-LL +     match *x {
-   |
+LL |     match *x {
+   |           +
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:16:9
@@ -79,9 +77,8 @@ LL |         Some(_) => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match y {
-LL +     match *y {
-   |
+LL |     match *y {
+   |           +
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:28:9
@@ -96,9 +93,8 @@ LL |         None => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match y {
-LL +     match *y {
-   |
+LL |     match *y {
+   |           +
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:36:9
@@ -147,9 +143,8 @@ LL |         Some(_) => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match z_const {
-LL +     match &**z_const {
-   |
+LL |     match &**z_const {
+   |           +++
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:48:9
@@ -164,9 +159,8 @@ LL |         None => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match z_const {
-LL +     match &**z_const {
-   |
+LL |     match &**z_const {
+   |           +++
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:57:9
@@ -181,9 +175,8 @@ LL |         Some(_) => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match z_mut {
-LL +     match &**z_mut {
-   |
+LL |     match &**z_mut {
+   |           +++
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:59:9
@@ -198,9 +191,8 @@ LL |         None => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match z_mut {
-LL +     match &**z_mut {
-   |
+LL |     match &**z_mut {
+   |           +++
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:68:9
@@ -215,9 +207,8 @@ LL |         Some(_) => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match y_mut {
-LL +     match &**y_mut {
-   |
+LL |     match &**y_mut {
+   |           +++
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:70:9
@@ -232,9 +223,8 @@ LL |         None => {}
                 found enum `Option<_>`
 help: consider dereferencing to access the inner value using the Deref trait
    |
-LL -     match y_mut {
-LL +     match &**y_mut {
-   |
+LL |     match &**y_mut {
+   |           +++
 
 error[E0308]: mismatched types
   --> $DIR/suggest-deref-in-match-issue-132784.rs:79:9
diff --git a/tests/ui/suggestions/suggest-methods.stderr b/tests/ui/suggestions/suggest-methods.stderr
index 6f1c2cc4cab..b6925a4c626 100644
--- a/tests/ui/suggestions/suggest-methods.stderr
+++ b/tests/ui/suggestions/suggest-methods.stderr
@@ -45,9 +45,8 @@ LL |     let _ = 63u32.count_o();
    |
 help: there is a method `count_ones` with a similar name
    |
-LL -     let _ = 63u32.count_o();
-LL +     let _ = 63u32.count_ones();
-   |
+LL |     let _ = 63u32.count_ones();
+   |                          +++
 
 error: aborting due to 4 previous errors
 
diff --git a/tests/ui/suggestions/suggest-variants.stderr b/tests/ui/suggestions/suggest-variants.stderr
index b422da8fbfa..50286a96875 100644
--- a/tests/ui/suggestions/suggest-variants.stderr
+++ b/tests/ui/suggestions/suggest-variants.stderr
@@ -24,9 +24,8 @@ LL |     println!("My shape is {:?}", Shape::Circl { size: 5});
    |
 help: there is a variant with a similar name
    |
-LL -     println!("My shape is {:?}", Shape::Circl { size: 5});
-LL +     println!("My shape is {:?}", Shape::Circle { size: 5});
-   |
+LL |     println!("My shape is {:?}", Shape::Circle { size: 5});
+   |                                              +
 
 error[E0599]: no variant named `Rombus` found for enum `Shape`
   --> $DIR/suggest-variants.rs:14:41
@@ -63,9 +62,8 @@ LL |     Shape::Circl;
    |
 help: there is a variant with a similar name
    |
-LL -     Shape::Circl;
-LL +     Shape::Circle { radius: /* value */ };
-   |
+LL |     Shape::Circle { radius: /* value */ };
+   |                 +++++++++++++++++++++++++
 
 error[E0599]: no variant or associated item named `Rombus` found for enum `Shape` in the current scope
   --> $DIR/suggest-variants.rs:17:12
diff --git a/tests/ui/suggestions/type-ascription-instead-of-path-2.stderr b/tests/ui/suggestions/type-ascription-instead-of-path-2.stderr
index 70e8f5b58ac..0b37bf9a57b 100644
--- a/tests/ui/suggestions/type-ascription-instead-of-path-2.stderr
+++ b/tests/ui/suggestions/type-ascription-instead-of-path-2.stderr
@@ -7,9 +7,8 @@ LL |     let _ = vec![Ok(2)].into_iter().collect:<Result<Vec<_>,_>>()?;
    = note: type ascription syntax has been removed, see issue #101728 <https://github.com/rust-lang/rust/issues/101728>
 help: maybe write a path separator here
    |
-LL -     let _ = vec![Ok(2)].into_iter().collect:<Result<Vec<_>,_>>()?;
-LL +     let _ = vec![Ok(2)].into_iter().collect::<Result<Vec<_>,_>>()?;
-   |
+LL |     let _ = vec![Ok(2)].into_iter().collect::<Result<Vec<_>,_>>()?;
+   |                                             +
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/suggestions/type-ascription-instead-of-path-in-type.stderr b/tests/ui/suggestions/type-ascription-instead-of-path-in-type.stderr
index 5ba56d095f7..a424bc7e724 100644
--- a/tests/ui/suggestions/type-ascription-instead-of-path-in-type.stderr
+++ b/tests/ui/suggestions/type-ascription-instead-of-path-in-type.stderr
@@ -6,9 +6,8 @@ LL |     let _: Vec<A:B> = A::B;
    |
 help: you might have meant to write a path instead of an associated type bound
    |
-LL -     let _: Vec<A:B> = A::B;
-LL +     let _: Vec<A::B> = A::B;
-   |
+LL |     let _: Vec<A::B> = A::B;
+   |                  +
 
 error[E0107]: struct takes at least 1 generic argument but 0 generic arguments were supplied
   --> $DIR/type-ascription-instead-of-path-in-type.rs:6:12
diff --git a/tests/ui/suggestions/type-mismatch-byte-literal.stderr b/tests/ui/suggestions/type-mismatch-byte-literal.stderr
index e96ead569d9..7211d77fdcb 100644
--- a/tests/ui/suggestions/type-mismatch-byte-literal.stderr
+++ b/tests/ui/suggestions/type-mismatch-byte-literal.stderr
@@ -8,9 +8,8 @@ LL |     let _x: u8 = 'X';
    |
 help: if you meant to write a byte literal, prefix with `b`
    |
-LL -     let _x: u8 = 'X';
-LL +     let _x: u8 = b'X';
-   |
+LL |     let _x: u8 = b'X';
+   |                  +
 
 error[E0308]: mismatched types
   --> $DIR/type-mismatch-byte-literal.rs:11:9
@@ -27,9 +26,8 @@ LL | fn foo(_t: u8) {}
    |    ^^^ ------
 help: if you meant to write a byte literal, prefix with `b`
    |
-LL -     foo('#');
-LL +     foo(b'#');
-   |
+LL |     foo(b'#');
+   |         +
 
 error[E0308]: mismatched types
   --> $DIR/type-mismatch-byte-literal.rs:15:18
@@ -41,9 +39,8 @@ LL |     let _a: u8 = '\x20';
    |
 help: if you meant to write a byte literal, prefix with `b`
    |
-LL -     let _a: u8 = '\x20';
-LL +     let _a: u8 = b'\x20';
-   |
+LL |     let _a: u8 = b'\x20';
+   |                  +
 
 error[E0308]: mismatched types
   --> $DIR/type-mismatch-byte-literal.rs:20:9
diff --git a/tests/ui/test-attrs/inaccessible-test-modules.stderr b/tests/ui/test-attrs/inaccessible-test-modules.stderr
index 39f69b164fb..dfb6985730a 100644
--- a/tests/ui/test-attrs/inaccessible-test-modules.stderr
+++ b/tests/ui/test-attrs/inaccessible-test-modules.stderr
@@ -12,9 +12,8 @@ LL | use test as y;
    |
 help: consider importing this module instead
    |
-LL - use test as y;
-LL + use test::test as y;
-   |
+LL | use test::test as y;
+   |     ++++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/traits/alias/expand-higher-ranked-alias.rs b/tests/ui/traits/alias/expand-higher-ranked-alias.rs
new file mode 100644
index 00000000000..8a301d39f4c
--- /dev/null
+++ b/tests/ui/traits/alias/expand-higher-ranked-alias.rs
@@ -0,0 +1,18 @@
+// Make sure we are using the right binder vars when expanding
+// `for<'a> Foo<'a>` to `for<'a> Bar<'a>`.
+
+//@ check-pass
+
+#![feature(trait_alias)]
+
+trait Bar<'a> {}
+
+trait Foo<'a> = Bar<'a>;
+
+fn test2(_: &(impl for<'a> Foo<'a> + ?Sized)) {}
+
+fn test(x: &dyn for<'a> Foo<'a>) {
+    test2(x);
+}
+
+fn main() {}
diff --git a/tests/ui/traits/associated_type_bound/assoc_type_bound_with_struct.stderr b/tests/ui/traits/associated_type_bound/assoc_type_bound_with_struct.stderr
index 23974c5b4aa..2288bd1129c 100644
--- a/tests/ui/traits/associated_type_bound/assoc_type_bound_with_struct.stderr
+++ b/tests/ui/traits/associated_type_bound/assoc_type_bound_with_struct.stderr
@@ -14,9 +14,8 @@ LL + struct Foo<T> where T: Bar, T: Bar<Baz = String> {
    |
 help: a trait with a similar name exists
    |
-LL - struct Foo<T> where T: Bar, <T as Bar>::Baz: String {
-LL + struct Foo<T> where T: Bar, <T as Bar>::Baz: ToString {
-   |
+LL | struct Foo<T> where T: Bar, <T as Bar>::Baz: ToString {
+   |                                              ++
 
 error[E0404]: expected trait, found struct `String`
   --> $DIR/assoc_type_bound_with_struct.rs:9:54
@@ -34,9 +33,8 @@ LL + struct Qux<'a, T> where T: Bar, &'a T: Bar<Baz = String> {
    |
 help: a trait with a similar name exists
    |
-LL - struct Qux<'a, T> where T: Bar, <&'a T as Bar>::Baz: String {
-LL + struct Qux<'a, T> where T: Bar, <&'a T as Bar>::Baz: ToString {
-   |
+LL | struct Qux<'a, T> where T: Bar, <&'a T as Bar>::Baz: ToString {
+   |                                                      ++
 
 error[E0404]: expected trait, found struct `String`
   --> $DIR/assoc_type_bound_with_struct.rs:13:45
@@ -54,9 +52,8 @@ LL + fn foo<T: Bar>(_: T) where T: Bar<Baz = String> {
    |
 help: a trait with a similar name exists
    |
-LL - fn foo<T: Bar>(_: T) where <T as Bar>::Baz: String {
-LL + fn foo<T: Bar>(_: T) where <T as Bar>::Baz: ToString {
-   |
+LL | fn foo<T: Bar>(_: T) where <T as Bar>::Baz: ToString {
+   |                                             ++
 
 error[E0404]: expected trait, found struct `String`
   --> $DIR/assoc_type_bound_with_struct.rs:16:57
@@ -74,9 +71,8 @@ LL + fn qux<'a, T: Bar>(_: &'a T) where &'a T: Bar<Baz = String> {
    |
 help: a trait with a similar name exists
    |
-LL - fn qux<'a, T: Bar>(_: &'a T) where <&'a T as Bar>::Baz: String {
-LL + fn qux<'a, T: Bar>(_: &'a T) where <&'a T as Bar>::Baz: ToString {
-   |
+LL | fn qux<'a, T: Bar>(_: &'a T) where <&'a T as Bar>::Baz: ToString {
+   |                                                         ++
 
 error[E0405]: cannot find trait `Unresolved` in this scope
   --> $DIR/assoc_type_bound_with_struct.rs:19:31
diff --git a/tests/ui/traits/item-privacy.rs b/tests/ui/traits/item-privacy.rs
index f5c741ccaa5..cdfd667a6f1 100644
--- a/tests/ui/traits/item-privacy.rs
+++ b/tests/ui/traits/item-privacy.rs
@@ -98,9 +98,12 @@ fn check_assoc_const() {
     S::B; //~ ERROR no associated item named `B` found
     S::C; // OK
     // A, B, C are resolved as inherent items, their traits don't need to be in scope
-    <dyn C>::A; //~ ERROR associated constant `A` is private
-                //~^ ERROR the trait `assoc_const::C` is not dyn compatible
-    <dyn C>::B; // ERROR the trait `assoc_const::C` is not dyn compatible
+    <dyn C>::A;
+    //~^ ERROR associated constant `A` is private
+    //~| ERROR the trait `assoc_const::C` is not dyn compatible
+    //~| ERROR the trait `assoc_const::C` is not dyn compatible
+    <dyn C>::B;
+    //~^ ERROR the trait `assoc_const::C` is not dyn compatible
     C::C; // OK
 }
 
diff --git a/tests/ui/traits/item-privacy.stderr b/tests/ui/traits/item-privacy.stderr
index ddead3fdfd3..4fd9ef91192 100644
--- a/tests/ui/traits/item-privacy.stderr
+++ b/tests/ui/traits/item-privacy.stderr
@@ -130,6 +130,31 @@ help: trait `B` which provides `B` is implemented but not in scope; perhaps you
 LL + use assoc_const::B;
    |
 
+error[E0038]: the trait `assoc_const::C` is not dyn compatible
+  --> $DIR/item-privacy.rs:101:6
+   |
+LL |     <dyn C>::A;
+   |      ^^^^^ `assoc_const::C` is not dyn compatible
+   |
+note: for a trait to be dyn compatible it needs to allow building a vtable
+      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
+  --> $DIR/item-privacy.rs:25:15
+   |
+LL |         const A: u8 = 0;
+   |               ^ ...because it contains this associated `const`
+...
+LL |         const B: u8 = 0;
+   |               ^ ...because it contains this associated `const`
+...
+LL |     pub trait C: A + B {
+   |               - this trait is not dyn compatible...
+LL |         const C: u8 = 0;
+   |               ^ ...because it contains this associated `const`
+   = help: consider moving `C` to another trait
+   = help: consider moving `A` to another trait
+   = help: consider moving `B` to another trait
+   = help: only type `S` implements `assoc_const::C`; consider using it directly instead.
+
 error[E0624]: associated constant `A` is private
   --> $DIR/item-privacy.rs:101:14
    |
@@ -140,10 +165,35 @@ LL |     <dyn C>::A;
    |              ^ private associated constant
 
 error[E0038]: the trait `assoc_const::C` is not dyn compatible
-  --> $DIR/item-privacy.rs:101:6
+  --> $DIR/item-privacy.rs:101:5
    |
 LL |     <dyn C>::A;
-   |      ^^^^^ `assoc_const::C` is not dyn compatible
+   |     ^^^^^^^^^^ `assoc_const::C` is not dyn compatible
+   |
+note: for a trait to be dyn compatible it needs to allow building a vtable
+      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
+  --> $DIR/item-privacy.rs:25:15
+   |
+LL |         const A: u8 = 0;
+   |               ^ ...because it contains this associated `const`
+...
+LL |         const B: u8 = 0;
+   |               ^ ...because it contains this associated `const`
+...
+LL |     pub trait C: A + B {
+   |               - this trait is not dyn compatible...
+LL |         const C: u8 = 0;
+   |               ^ ...because it contains this associated `const`
+   = help: consider moving `C` to another trait
+   = help: consider moving `A` to another trait
+   = help: consider moving `B` to another trait
+   = help: only type `S` implements `assoc_const::C`; consider using it directly instead.
+
+error[E0038]: the trait `assoc_const::C` is not dyn compatible
+  --> $DIR/item-privacy.rs:105:5
+   |
+LL |     <dyn C>::B;
+   |     ^^^^^^^^^^ `assoc_const::C` is not dyn compatible
    |
 note: for a trait to be dyn compatible it needs to allow building a vtable
       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
@@ -165,7 +215,7 @@ LL |         const C: u8 = 0;
    = help: only type `S` implements `assoc_const::C`; consider using it directly instead.
 
 error[E0223]: ambiguous associated type
-  --> $DIR/item-privacy.rs:115:12
+  --> $DIR/item-privacy.rs:118:12
    |
 LL |     let _: S::A;
    |            ^^^^
@@ -177,19 +227,19 @@ LL +     let _: <S as Example>::A;
    |
 
 error[E0223]: ambiguous associated type
-  --> $DIR/item-privacy.rs:116:12
+  --> $DIR/item-privacy.rs:119:12
    |
 LL |     let _: S::B;
    |            ^^^^ help: use fully-qualified syntax: `<S as assoc_ty::B>::B`
 
 error[E0223]: ambiguous associated type
-  --> $DIR/item-privacy.rs:117:12
+  --> $DIR/item-privacy.rs:120:12
    |
 LL |     let _: S::C;
    |            ^^^^ help: use fully-qualified syntax: `<S as assoc_ty::C>::C`
 
 error[E0624]: associated type `A` is private
-  --> $DIR/item-privacy.rs:119:12
+  --> $DIR/item-privacy.rs:122:12
    |
 LL |         type A = u8;
    |         ------ the associated type is defined here
@@ -198,7 +248,7 @@ LL |     let _: T::A;
    |            ^^^^ private associated type
 
 error[E0624]: associated type `A` is private
-  --> $DIR/item-privacy.rs:128:9
+  --> $DIR/item-privacy.rs:131:9
    |
 LL |         type A = u8;
    |         ------ the associated type is defined here
@@ -206,7 +256,7 @@ LL |         type A = u8;
 LL |         A = u8,
    |         ^^^^^^ private associated type
 
-error: aborting due to 15 previous errors
+error: aborting due to 17 previous errors
 
 Some errors have detailed explanations: E0038, E0223, E0599, E0624.
 For more information about an error, try `rustc --explain E0038`.
diff --git a/tests/ui/traits/next-solver/method/path_lookup_wf_constraints.rs b/tests/ui/traits/next-solver/method/path_lookup_wf_constraints.rs
new file mode 100644
index 00000000000..fbe170b1990
--- /dev/null
+++ b/tests/ui/traits/next-solver/method/path_lookup_wf_constraints.rs
@@ -0,0 +1,39 @@
+//@ compile-flags: -Znext-solver
+//@ check-pass
+
+// A regression test for trait-system-refactor-initiative#161
+
+trait Constrain<T> {
+    type Assoc;
+}
+impl<T> Constrain<T> for () {
+    type Assoc = ();
+}
+struct Foo<T, U = <() as Constrain<T>>::Assoc>(T, U);
+
+impl<T: Copy> Foo<T> {
+    fn foo() {}
+}
+struct B;
+impl Foo<B> {
+    fn foo() {}
+}
+
+type Alias<T> = Foo<T>;
+fn via_guidance<T: Copy>()
+where
+    (): Constrain<T>,
+{
+    // Method selection on `Foo<?t, <() as Constrain<?t>>::Assoc>` is ambiguous.
+    // only by unnecessarily constraining `?t` to `T` when proving `(): Constrain<?t>`
+    // are we able to select the first impl.
+    //
+    // This happens in the old solver when normalizing `Alias<?t>`. The new solver doesn't try
+    // to eagerly normalize `<() as Constrain<?t>>::Assoc` so we instead always prove that the
+    // self type is well-formed before method lookup.
+    Alias::foo();
+}
+
+fn main() {
+    via_guidance::<()>();
+}
diff --git a/tests/ui/traits/non_lifetime_binders/type-match-with-late-bound.stderr b/tests/ui/traits/non_lifetime_binders/type-match-with-late-bound.stderr
index 1117ee7efb3..9d54675c260 100644
--- a/tests/ui/traits/non_lifetime_binders/type-match-with-late-bound.stderr
+++ b/tests/ui/traits/non_lifetime_binders/type-match-with-late-bound.stderr
@@ -25,9 +25,8 @@ LL |     for<F> F: 'a,
    |               ^^
 help: consider adding an explicit lifetime bound
    |
-LL -     for<F> F: 'a,
-LL +     for<F> F: 'a, !1_"F": 'a
-   |
+LL |     for<F> F: 'a, !1_"F": 'a
+   |                   ++++++++++
 
 error[E0309]: the placeholder type `!1_"F"` may not live long enough
   --> $DIR/type-match-with-late-bound.rs:11:1
@@ -40,9 +39,8 @@ LL | {}
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     for<F> F: 'a,
-LL +     for<F> F: 'a, !1_"F": 'a
-   |
+LL |     for<F> F: 'a, !1_"F": 'a
+   |                   ++++++++++
 
 error[E0309]: the placeholder type `!2_"F"` may not live long enough
   --> $DIR/type-match-with-late-bound.rs:11:1
@@ -55,9 +53,8 @@ LL | {}
    |
 help: consider adding an explicit lifetime bound
    |
-LL -     for<F> F: 'a,
-LL +     for<F> F: 'a, !2_"F": 'a
-   |
+LL |     for<F> F: 'a, !2_"F": 'a
+   |                   ++++++++++
 
 error: aborting due to 3 previous errors; 1 warning emitted
 
diff --git a/tests/ui/transmutability/assoc-bound.stderr b/tests/ui/transmutability/assoc-bound.stderr
index 4ff67bd636a..4dff24e2002 100644
--- a/tests/ui/transmutability/assoc-bound.stderr
+++ b/tests/ui/transmutability/assoc-bound.stderr
@@ -12,9 +12,8 @@ LL |     type AssocB: std::mem::TransmuteFrom<()>;
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `B::AssocB`
 help: consider further restricting the associated type
    |
-LL -     T: A,
-LL +     T: A, <T as A>::AssocA: TransmuteFrom<(), Assume { alignment: false, lifetimes: false, safety: false, validity: false }>
-   |
+LL |     T: A, <T as A>::AssocA: TransmuteFrom<(), Assume { alignment: false, lifetimes: false, safety: false, validity: false }>
+   |           ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
 error[E0277]: `()` cannot be safely transmuted into `<&i32 as A>::AssocA`
   --> $DIR/assoc-bound.rs:24:19
diff --git a/tests/ui/type-alias-impl-trait/constrain_in_projection.current.stderr b/tests/ui/type-alias-impl-trait/constrain_in_projection.current.stderr
index d96c86a2e6f..580258bbb28 100644
--- a/tests/ui/type-alias-impl-trait/constrain_in_projection.current.stderr
+++ b/tests/ui/type-alias-impl-trait/constrain_in_projection.current.stderr
@@ -7,6 +7,15 @@ LL |     let x = <Foo as Trait<Bar>>::Assoc::default();
    = help: the trait `Trait<Bar>` is not implemented for `Foo`
            but trait `Trait<()>` is implemented for it
 
-error: aborting due to 1 previous error
+error[E0277]: the trait bound `Foo: Trait<Bar>` is not satisfied
+  --> $DIR/constrain_in_projection.rs:24:13
+   |
+LL |     let x = <Foo as Trait<Bar>>::Assoc::default();
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait<Bar>` is not implemented for `Foo`
+   |
+   = help: the trait `Trait<Bar>` is not implemented for `Foo`
+           but trait `Trait<()>` is implemented for it
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/type-alias-impl-trait/constrain_in_projection.rs b/tests/ui/type-alias-impl-trait/constrain_in_projection.rs
index 7d7d16361ae..355c0e1692b 100644
--- a/tests/ui/type-alias-impl-trait/constrain_in_projection.rs
+++ b/tests/ui/type-alias-impl-trait/constrain_in_projection.rs
@@ -23,6 +23,7 @@ impl Trait<()> for Foo {
 fn bop(_: Bar) {
     let x = <Foo as Trait<Bar>>::Assoc::default();
     //[current]~^ `Foo: Trait<Bar>` is not satisfied
+    //[current]~| `Foo: Trait<Bar>` is not satisfied
 }
 
 fn main() {}
diff --git a/tests/ui/type-alias-impl-trait/constrain_in_projection2.current.stderr b/tests/ui/type-alias-impl-trait/constrain_in_projection2.current.stderr
index 909f1f6d61c..777fe1e2788 100644
--- a/tests/ui/type-alias-impl-trait/constrain_in_projection2.current.stderr
+++ b/tests/ui/type-alias-impl-trait/constrain_in_projection2.current.stderr
@@ -8,6 +8,16 @@ LL |     let x = <Foo as Trait<Bar>>::Assoc::default();
              `Foo` implements `Trait<()>`
              `Foo` implements `Trait<u32>`
 
-error: aborting due to 1 previous error
+error[E0277]: the trait bound `Foo: Trait<Bar>` is not satisfied
+  --> $DIR/constrain_in_projection2.rs:27:13
+   |
+LL |     let x = <Foo as Trait<Bar>>::Assoc::default();
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait<Bar>` is not implemented for `Foo`
+   |
+   = help: the following other types implement trait `Trait<T>`:
+             `Foo` implements `Trait<()>`
+             `Foo` implements `Trait<u32>`
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/type-alias-impl-trait/constrain_in_projection2.rs b/tests/ui/type-alias-impl-trait/constrain_in_projection2.rs
index af222f6c153..16b1329b52f 100644
--- a/tests/ui/type-alias-impl-trait/constrain_in_projection2.rs
+++ b/tests/ui/type-alias-impl-trait/constrain_in_projection2.rs
@@ -27,6 +27,7 @@ fn bop(_: Bar) {
     let x = <Foo as Trait<Bar>>::Assoc::default();
     //[next]~^ ERROR: cannot satisfy `Foo: Trait<Bar>`
     //[current]~^^ ERROR: `Foo: Trait<Bar>` is not satisfied
+    //[current]~| ERROR: `Foo: Trait<Bar>` is not satisfied
 }
 
 fn main() {}
diff --git a/tests/ui/type/issue-100584.stderr b/tests/ui/type/issue-100584.stderr
index 7cbab154066..1523bdda761 100644
--- a/tests/ui/type/issue-100584.stderr
+++ b/tests/ui/type/issue-100584.stderr
@@ -19,9 +19,8 @@ LL |     let _ = format!("{xyza}");
    |             ++++++++        +
 help: if this is intentional, prefix it with an underscore
    |
-LL - fn foo(xyza: &str) {
-LL + fn foo(_xyza: &str) {
-   |
+LL | fn foo(_xyza: &str) {
+   |        +
 
 error: unused variable: `xyza`
   --> $DIR/issue-100584.rs:7:9
@@ -38,9 +37,8 @@ LL |     let _ = format!("aaa{xyza}bbb");
    |             ++++++++              +
 help: if this is intentional, prefix it with an underscore
    |
-LL - fn foo3(xyza: &str) {
-LL + fn foo3(_xyza: &str) {
-   |
+LL | fn foo3(_xyza: &str) {
+   |         +
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/type/pattern_types/pattern_type_mismatch.stderr b/tests/ui/type/pattern_types/pattern_type_mismatch.stderr
index aaf41ed6eba..4af92a89c44 100644
--- a/tests/ui/type/pattern_types/pattern_type_mismatch.stderr
+++ b/tests/ui/type/pattern_types/pattern_type_mismatch.stderr
@@ -6,9 +6,8 @@ LL | const BAD_NESTING4: pattern_type!(u8 is 'a'..='a') = todo!();
    |
 help: if you meant to write a byte literal, prefix with `b`
    |
-LL - const BAD_NESTING4: pattern_type!(u8 is 'a'..='a') = todo!();
-LL + const BAD_NESTING4: pattern_type!(u8 is b'a'..='a') = todo!();
-   |
+LL | const BAD_NESTING4: pattern_type!(u8 is b'a'..='a') = todo!();
+   |                                         +
 
 error[E0308]: mismatched types
   --> $DIR/pattern_type_mismatch.rs:8:47
@@ -18,9 +17,8 @@ LL | const BAD_NESTING4: pattern_type!(u8 is 'a'..='a') = todo!();
    |
 help: if you meant to write a byte literal, prefix with `b`
    |
-LL - const BAD_NESTING4: pattern_type!(u8 is 'a'..='a') = todo!();
-LL + const BAD_NESTING4: pattern_type!(u8 is 'a'..=b'a') = todo!();
-   |
+LL | const BAD_NESTING4: pattern_type!(u8 is 'a'..=b'a') = todo!();
+   |                                               +
 
 error[E0308]: mismatched types
   --> $DIR/pattern_type_mismatch.rs:12:43
diff --git a/tests/ui/typeck/issue-29181.stderr b/tests/ui/typeck/issue-29181.stderr
index e73c3e51881..ca82405966e 100644
--- a/tests/ui/typeck/issue-29181.stderr
+++ b/tests/ui/typeck/issue-29181.stderr
@@ -12,9 +12,8 @@ LL |     let _ = |x: f64| x * 2.0.exp();
    |
 help: you must specify a concrete type for this numeric value, like `f32`
    |
-LL -     let _ = |x: f64| x * 2.0.exp();
-LL +     let _ = |x: f64| x * 2.0_f32.exp();
-   |
+LL |     let _ = |x: f64| x * 2.0_f32.exp();
+   |                             ++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/typeck/method-chain-gats.stderr b/tests/ui/typeck/method-chain-gats.stderr
index 902255a28a6..d3a54dbd0f9 100644
--- a/tests/ui/typeck/method-chain-gats.stderr
+++ b/tests/ui/typeck/method-chain-gats.stderr
@@ -19,9 +19,8 @@ LL |         Self::Base<B>: Functor<B>;
    |                        ^^^^^^^^^^ required by this bound in `Functor::fmap`
 help: consider further restricting the associated type
    |
-LL -     T::Base<B>: Functor<B, Base<C> = T::Base<C>>,
-LL +     T::Base<B>: Functor<B, Base<C> = T::Base<C>>, <T as Base>::Base<C>: Functor<C>
-   |
+LL |     T::Base<B>: Functor<B, Base<C> = T::Base<C>>, <T as Base>::Base<C>: Functor<C>
+   |                                                   ++++++++++++++++++++++++++++++++
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/typeck/mismatched-map-under-self.stderr b/tests/ui/typeck/mismatched-map-under-self.stderr
index fd6b3093ec9..541de25749e 100644
--- a/tests/ui/typeck/mismatched-map-under-self.stderr
+++ b/tests/ui/typeck/mismatched-map-under-self.stderr
@@ -13,9 +13,8 @@ LL |     fn values(&self) -> Self::Values;
               found signature `fn(Option<_>)`
 help: change the self-receiver type to match the trait
    |
-LL -     fn values(self) -> Self::Values {
-LL +     fn values(&self) -> Self::Values {
-   |
+LL |     fn values(&self) -> Self::Values {
+   |               +
 
 error[E0631]: type mismatch in function arguments
   --> $DIR/mismatched-map-under-self.rs:12:18
diff --git a/tests/ui/unresolved/unresolved-candidates.stderr b/tests/ui/unresolved/unresolved-candidates.stderr
index 0810f90306e..7be1bcd38de 100644
--- a/tests/ui/unresolved/unresolved-candidates.stderr
+++ b/tests/ui/unresolved/unresolved-candidates.stderr
@@ -6,9 +6,8 @@ LL |     use Trait;
    |
 help: consider importing this trait instead
    |
-LL -     use Trait;
-LL +     use a::Trait;
-   |
+LL |     use a::Trait;
+   |         +++
 
 error[E0405]: cannot find trait `Trait` in this scope
   --> $DIR/unresolved-candidates.rs:10:10