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-rw-r--r--compiler/rustc_ast_lowering/src/format.rs20
-rw-r--r--compiler/rustc_attr_parsing/src/attributes/debugger.rs60
-rw-r--r--compiler/rustc_attr_parsing/src/attributes/mod.rs1
-rw-r--r--compiler/rustc_attr_parsing/src/context.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/abi.rs8
-rw-r--r--compiler/rustc_codegen_llvm/src/allocator.rs25
-rw-r--r--compiler/rustc_codegen_llvm/src/attributes.rs191
-rw-r--r--compiler/rustc_codegen_llvm/src/base.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/builder.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/context.rs10
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/declare.rs2
-rw-r--r--compiler/rustc_codegen_ssa/src/base.rs4
-rw-r--r--compiler/rustc_const_eval/src/lib.rs1
-rw-r--r--compiler/rustc_const_eval/src/util/caller_location.rs2
-rw-r--r--compiler/rustc_expand/src/base.rs23
-rw-r--r--compiler/rustc_expand/src/expand.rs2
-rw-r--r--compiler/rustc_expand/src/mbe/macro_rules.rs28
-rw-r--r--compiler/rustc_feature/src/accepted.rs6
-rw-r--r--compiler/rustc_feature/src/removed.rs4
-rw-r--r--compiler/rustc_feature/src/unstable.rs18
-rw-r--r--compiler/rustc_hir/src/attrs/data_structures.rs19
-rw-r--r--compiler/rustc_hir/src/attrs/encode_cross_crate.rs1
-rw-r--r--compiler/rustc_hir_typeck/src/expr.rs3
-rw-r--r--compiler/rustc_hir_typeck/src/method/confirm.rs4
-rw-r--r--compiler/rustc_hir_typeck/src/method/probe.rs267
-rw-r--r--compiler/rustc_index/src/idx.rs6
-rw-r--r--compiler/rustc_infer/src/infer/canonical/query_response.rs20
-rw-r--r--compiler/rustc_lint_defs/src/builtin.rs11
-rw-r--r--compiler/rustc_macros/src/query.rs2
-rw-r--r--compiler/rustc_middle/src/arena.rs1
-rw-r--r--compiler/rustc_middle/src/lib.rs1
-rw-r--r--compiler/rustc_middle/src/middle/debugger_visualizer.rs8
-rw-r--r--compiler/rustc_middle/src/query/mod.rs6
-rw-r--r--compiler/rustc_middle/src/traits/query.rs13
-rw-r--r--compiler/rustc_middle/src/traits/solve.rs45
-rw-r--r--compiler/rustc_middle/src/ty/context.rs17
-rw-r--r--compiler/rustc_middle/src/ty/structural_impls.rs1
-rw-r--r--compiler/rustc_mir_build/src/builder/mod.rs6
-rw-r--r--compiler/rustc_next_trait_solver/src/canonical/mod.rs8
-rw-r--r--compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs10
-rw-r--r--compiler/rustc_next_trait_solver/src/solve/mod.rs1
-rw-r--r--compiler/rustc_passes/messages.ftl9
-rw-r--r--compiler/rustc_passes/src/check_attr.rs16
-rw-r--r--compiler/rustc_passes/src/debugger_visualizer.rs113
-rw-r--r--compiler/rustc_passes/src/errors.rs17
-rw-r--r--compiler/rustc_privacy/src/lib.rs22
-rw-r--r--compiler/rustc_resolve/src/build_reduced_graph.rs19
-rw-r--r--compiler/rustc_resolve/src/ident.rs11
-rw-r--r--compiler/rustc_resolve/src/imports.rs26
-rw-r--r--compiler/rustc_resolve/src/lib.rs128
-rw-r--r--compiler/rustc_resolve/src/macros.rs2
-rw-r--r--compiler/rustc_span/src/lib.rs1
-rw-r--r--compiler/rustc_target/src/spec/base/windows_gnu.rs3
-rw-r--r--compiler/rustc_target/src/spec/crt_objects.rs17
-rw-r--r--compiler/rustc_target/src/spec/targets/armebv7r_none_eabi.rs2
-rw-r--r--compiler/rustc_target/src/spec/targets/armebv7r_none_eabihf.rs2
-rw-r--r--compiler/rustc_target/src/spec/targets/i686_pc_windows_gnu.rs8
-rw-r--r--compiler/rustc_trait_selection/src/infer.rs14
-rw-r--r--compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs11
-rw-r--r--compiler/rustc_type_ir/src/interner.rs8
-rw-r--r--compiler/rustc_type_ir/src/solve/mod.rs13
-rw-r--r--library/alloc/src/boxed.rs2
-rw-r--r--library/alloc/src/collections/btree/map.rs10
-rw-r--r--library/alloc/src/collections/btree/set.rs10
-rw-r--r--library/alloc/src/rc.rs2
-rw-r--r--library/alloc/src/sync.rs2
-rw-r--r--library/alloctests/tests/lib.rs1
-rw-r--r--library/core/src/any.rs2
-rw-r--r--library/core/src/array/mod.rs6
-rw-r--r--library/core/src/cell.rs4
-rw-r--r--library/core/src/iter/adapters/chain.rs2
-rw-r--r--library/core/src/iter/adapters/mod.rs2
-rw-r--r--library/core/src/iter/mod.rs2
-rw-r--r--library/core/src/iter/traits/accum.rs2
-rw-r--r--library/core/src/net/ip_addr.rs12
-rw-r--r--library/core/src/num/int_macros.rs56
-rw-r--r--library/core/src/num/uint_macros.rs64
-rw-r--r--library/core/src/ptr/mod.rs4
-rw-r--r--library/core/src/str/mod.rs8
-rw-r--r--library/core/src/sync/atomic.rs14
-rw-r--r--library/core/src/time.rs8
-rw-r--r--library/coretests/tests/fmt/mod.rs6
-rw-r--r--library/std/src/ffi/os_str.rs2
-rw-r--r--library/std/src/os/windows/ffi.rs2
-rw-r--r--library/std/src/panic.rs2
-rw-r--r--library/std/src/path.rs24
-rw-r--r--library/std/src/sys/pal/unix/stack_overflow.rs2
-rw-r--r--library/std/src/sys/stdio/vexos.rs2
-rw-r--r--src/bootstrap/src/core/build_steps/clippy.rs2
-rw-r--r--src/bootstrap/src/core/build_steps/compile.rs16
-rw-r--r--src/bootstrap/src/core/build_steps/dist.rs2
-rw-r--r--src/bootstrap/src/core/build_steps/gcc.rs2
-rw-r--r--src/bootstrap/src/core/build_steps/test.rs6
-rw-r--r--src/bootstrap/src/core/builder/cargo.rs2
-rw-r--r--src/bootstrap/src/core/builder/mod.rs4
-rw-r--r--src/bootstrap/src/core/builder/tests.rs49
-rw-r--r--src/bootstrap/src/core/config/config.rs72
-rw-r--r--src/bootstrap/src/core/config/tests.rs548
-rw-r--r--src/bootstrap/src/core/config/toml/mod.rs4
-rw-r--r--src/bootstrap/src/core/download.rs18
-rw-r--r--src/bootstrap/src/core/sanity.rs4
-rw-r--r--src/bootstrap/src/lib.rs28
-rw-r--r--src/bootstrap/src/utils/build_stamp.rs2
-rw-r--r--src/bootstrap/src/utils/cc_detect.rs10
-rw-r--r--src/bootstrap/src/utils/exec.rs6
-rw-r--r--src/bootstrap/src/utils/helpers/tests.rs11
-rw-r--r--src/bootstrap/src/utils/render_tests.rs2
-rw-r--r--src/bootstrap/src/utils/tarball.rs2
-rw-r--r--src/bootstrap/src/utils/tests/mod.rs53
-rw-r--r--src/doc/rustc/src/SUMMARY.md9
-rw-r--r--src/doc/rustc/src/platform-support.md4
-rw-r--r--src/doc/rustc/src/platform-support/apple-ios-macabi.md2
-rw-r--r--src/doc/rustc/src/platform-support/apple-ios.md2
-rw-r--r--src/doc/rustc/src/platform-support/arm-linux.md217
-rw-r--r--src/doc/rustc/src/platform-support/armeb-unknown-linux-gnueabi.md3
-rw-r--r--src/doc/rustc/src/platform-support/armebv7r-none-eabi.md2
-rw-r--r--src/doc/rustc/src/platform-support/armv5te-unknown-linux-gnueabi.md3
-rw-r--r--src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabi.md3
-rw-r--r--src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabihf.md3
-rw-r--r--src/doc/rustdoc/src/write-documentation/linking-to-items-by-name.md2
-rw-r--r--src/librustdoc/html/render/mod.rs7
-rw-r--r--src/librustdoc/html/render/write_shared.rs9
-rw-r--r--src/librustdoc/lib.rs1
-rw-r--r--src/librustdoc/passes/collect_intra_doc_links.rs2
-rw-r--r--src/stage01000
-rw-r--r--src/tools/clippy/clippy_lints/src/lib.rs1
-rw-r--r--src/tools/clippy/tests/missing-test-files.rs1
-rw-r--r--src/tools/clippy/tests/ui/author/macro_in_closure.stdout32
-rw-r--r--src/tools/clippy/tests/ui/author/macro_in_loop.stdout28
-rw-r--r--src/tools/clippy/tests/ui/useless_attribute.fixed2
-rw-r--r--src/tools/clippy/tests/ui/useless_attribute.rs2
-rw-r--r--src/tools/miri/src/lib.rs1
-rw-r--r--src/tools/miri/tests/panic/mir-validation.rs5
-rw-r--r--src/tools/rust-analyzer/crates/hir-expand/src/builtin/derive_macro.rs2
-rw-r--r--src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs2
-rw-r--r--src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs2
-rw-r--r--src/tools/rustfmt/src/config/mod.rs1
-rw-r--r--tests/coverage/issue-83601.cov-map34
-rw-r--r--tests/coverage/issue-84561.cov-map136
-rw-r--r--tests/rustdoc-gui/search-title.goml12
-rw-r--r--tests/rustdoc-gui/src/test_docs/lib.rs1
-rw-r--r--tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.rs21
-rw-r--r--tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.stderr39
-rw-r--r--tests/rustdoc-ui/intra-doc/type-alias-primitive.rs14
-rw-r--r--tests/rustdoc/intra-doc/type-alias-primitive.rs21
-rw-r--r--tests/ui/array-slice-vec/box-of-array-of-drop-1.rs1
-rw-r--r--tests/ui/array-slice-vec/box-of-array-of-drop-2.rs1
-rw-r--r--tests/ui/array-slice-vec/nested-vec-3.rs1
-rw-r--r--tests/ui/array-slice-vec/slice-panic-1.rs1
-rw-r--r--tests/ui/array-slice-vec/slice-panic-2.rs1
-rw-r--r--tests/ui/asm/global-asm-isnt-really-a-mir-body.rs1
-rw-r--r--tests/ui/asm/x86_64/goto.rs1
-rw-r--r--tests/ui/asm/x86_64/goto.stderr4
-rw-r--r--tests/ui/asm/x86_64/srcloc.rs1
-rw-r--r--tests/ui/asm/x86_64/srcloc.stderr50
-rw-r--r--tests/ui/attributes/fn-align-dyn.rs1
-rw-r--r--tests/ui/attributes/main-removed-2/main.rs1
-rw-r--r--tests/ui/attributes/malformed-attrs.rs3
-rw-r--r--tests/ui/attributes/malformed-attrs.stderr53
-rw-r--r--tests/ui/backtrace/synchronized-panic-handler.rs1
-rw-r--r--tests/ui/backtrace/synchronized-panic-handler.run.stderr4
-rw-r--r--tests/ui/box/unit/unwind-unique.rs1
-rw-r--r--tests/ui/c-variadic/inherent-method.rs1
-rw-r--r--tests/ui/c-variadic/trait-method.rs1
-rw-r--r--tests/ui/c-variadic/valid.rs1
-rw-r--r--tests/ui/cfg/assume-incomplete-release/assume-incomplete.rs1
-rw-r--r--tests/ui/closures/deduce-signature/obligation-with-leaking-placeholders.next.stderr2
-rw-r--r--tests/ui/codegen/issue-82833-slice-miscompile.rs1
-rw-r--r--tests/ui/codegen/llvm-args-invalid-flag.rs1
-rw-r--r--tests/ui/codegen/remark-flag-functionality.rs1
-rw-r--r--tests/ui/codegen/virtual-function-elimination.rs1
-rw-r--r--tests/ui/coroutine/copy-fast-path-query-cycle.rs40
-rw-r--r--tests/ui/coroutine/gen_block_panic.rs1
-rw-r--r--tests/ui/coroutine/gen_block_panic.stderr2
-rw-r--r--tests/ui/delegation/fn-header-variadic.rs1
-rw-r--r--tests/ui/delegation/fn-header-variadic.stderr4
-rw-r--r--tests/ui/drop/drop-trait-enum.rs1
-rw-r--r--tests/ui/drop/terminate-in-initializer.rs1
-rw-r--r--tests/ui/explicit-tail-calls/callee_is_track_caller.rs1
-rw-r--r--tests/ui/explicit-tail-calls/callee_is_track_caller.stderr2
-rw-r--r--tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.rs1
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-rw-r--r--tests/ui/explicit-tail-calls/drop-order.rs1
-rw-r--r--tests/ui/explicit-tail-calls/indexer.rs1
-rw-r--r--tests/ui/explicit-tail-calls/recursion-etc.rs1
-rw-r--r--tests/ui/extern/extern-types-field-offset.rs1
-rw-r--r--tests/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs1
-rw-r--r--tests/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs1
-rw-r--r--tests/ui/feature-gates/feature-gate-sanitize.stderr2
-rw-r--r--tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.rs1
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-rw-r--r--tests/ui/frontmatter/proc-macro-observer.rs1
-rw-r--r--tests/ui/hygiene/issue-77523-def-site-async-await.rs1
-rw-r--r--tests/ui/impl-trait/call_method_ambiguous.next.stderr17
-rw-r--r--tests/ui/impl-trait/call_method_ambiguous.rs3
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-rw-r--r--tests/ui/panics/oom-panic-unwind.rs1
-rw-r--r--tests/ui/panics/panic-handler-chain-update-hook.rs1
-rw-r--r--tests/ui/panics/panic-handler-chain.rs1
-rw-r--r--tests/ui/panics/panic-handler-flail-wildly.rs1
-rw-r--r--tests/ui/panics/panic-handler-set-twice.rs1
-rw-r--r--tests/ui/panics/panic-in-dtor-drops-fields.rs1
-rw-r--r--tests/ui/panics/panic-recover-propagate.rs1
-rw-r--r--tests/ui/panics/rvalue-cleanup-during-box-panic.rs1
-rw-r--r--tests/ui/panics/unwind-force-no-unwind-tables.rs1
-rw-r--r--tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.rs1
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-rw-r--r--tests/ui/proc-macro/bang-macro.rs1
-rw-r--r--tests/ui/proc-macro/call-site.rs1
-rw-r--r--tests/ui/proc-macro/count_compound_ops.rs1
-rw-r--r--tests/ui/proc-macro/derive-bad.rs1
-rw-r--r--tests/ui/proc-macro/derive-bad.stderr6
-rw-r--r--tests/ui/proc-macro/derive-helper-shadowing.rs1
-rw-r--r--tests/ui/proc-macro/derive-helper-shadowing.stderr18
-rw-r--r--tests/ui/proc-macro/derive-same-struct.rs1
-rw-r--r--tests/ui/proc-macro/edition-imports-2018.rs1
-rw-r--r--tests/ui/proc-macro/env.rs1
-rw-r--r--tests/ui/proc-macro/expand-expr.rs3
-rw-r--r--tests/ui/proc-macro/expand-expr.stderr14
-rw-r--r--tests/ui/proc-macro/expand-to-unstable.rs1
-rw-r--r--tests/ui/proc-macro/expand-to-unstable.stderr2
-rw-r--r--tests/ui/proc-macro/expand-with-a-macro.rs1
-rw-r--r--tests/ui/proc-macro/gen-macro-rules-hygiene.rs1
-rw-r--r--tests/ui/proc-macro/gen-macro-rules-hygiene.stderr6
-rw-r--r--tests/ui/proc-macro/gen-macro-rules.rs1
-rw-r--r--tests/ui/proc-macro/generate-mod.rs1
-rw-r--r--tests/ui/proc-macro/generate-mod.stderr28
-rw-r--r--tests/ui/proc-macro/hygiene_example.rs1
-rw-r--r--tests/ui/proc-macro/is-available.rs1
-rw-r--r--tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.rs1
-rw-r--r--tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.stderr18
-rw-r--r--tests/ui/proc-macro/issue-107113-wrap.rs1
-rw-r--r--tests/ui/proc-macro/issue-107113-wrap.stderr2
-rw-r--r--tests/ui/proc-macro/issue-118809.rs1
-rw-r--r--tests/ui/proc-macro/issue-118809.stderr4
-rw-r--r--tests/ui/proc-macro/issue-38586.rs1
-rw-r--r--tests/ui/proc-macro/issue-38586.stderr2
-rw-r--r--tests/ui/proc-macro/issue-59191-replace-root-with-fn.rs1
-rw-r--r--tests/ui/proc-macro/issue-79148.rs1
-rw-r--r--tests/ui/proc-macro/issue-79148.stderr4
-rw-r--r--tests/ui/proc-macro/issue-83510.rs1
-rw-r--r--tests/ui/proc-macro/issue-83510.stderr8
-rw-r--r--tests/ui/proc-macro/issue-91800.rs1
-rw-r--r--tests/ui/proc-macro/issue-91800.stderr14
-rw-r--r--tests/ui/proc-macro/lifetimes-rpass.rs1
-rw-r--r--tests/ui/proc-macro/lints_in_proc_macros.rs1
-rw-r--r--tests/ui/proc-macro/lints_in_proc_macros.stderr2
-rw-r--r--tests/ui/proc-macro/load-two.rs1
-rw-r--r--tests/ui/proc-macro/macro-crate-multi-decorator.rs1
-rw-r--r--tests/ui/proc-macro/macro_rules_edition_from_pm.rs1
-rw-r--r--tests/ui/proc-macro/match-expander.rs1
-rw-r--r--tests/ui/proc-macro/match-expander.stderr2
-rw-r--r--tests/ui/proc-macro/mixed-site-span.rs1
-rw-r--r--tests/ui/proc-macro/mixed-site-span.stderr104
-rw-r--r--tests/ui/proc-macro/modify-ast.rs1
-rw-r--r--tests/ui/proc-macro/parent-source-spans.rs1
-rw-r--r--tests/ui/proc-macro/parent-source-spans.stderr42
-rw-r--r--tests/ui/proc-macro/quote/basic.rs1
-rw-r--r--tests/ui/proc-macro/quote/not-repeatable.rs4
-rw-r--r--tests/ui/proc-macro/quote/not-repeatable.stderr11
-rw-r--r--tests/ui/proc-macro/span-api-tests.rs1
-rw-r--r--tests/ui/proc-macro/span-from-proc-macro.rs1
-rw-r--r--tests/ui/proc-macro/span-from-proc-macro.stderr8
-rw-r--r--tests/ui/proc-macro/weird-hygiene.rs1
-rw-r--r--tests/ui/proc-macro/weird-hygiene.stderr4
-rw-r--r--tests/ui/process/multi-panic.rs1
-rw-r--r--tests/ui/repeat-expr/copy-inference-side-effects-are-lazy.stderr4
-rw-r--r--tests/ui/resolve/prelude-order.rs1
-rw-r--r--tests/ui/resolve/prelude-order.stderr10
-rw-r--r--tests/ui/resolve/unused-macro-import.rs13
-rw-r--r--tests/ui/resolve/unused-macro-import.stderr14
-rw-r--r--tests/ui/rfcs/rfc-3348-c-string-literals/edition-spans.rs1
-rw-r--r--tests/ui/runtime/backtrace-debuginfo.rs1
-rw-r--r--tests/ui/runtime/out-of-stack.rs1
-rw-r--r--tests/ui/rust-2018/suggestions-not-always-applicable.fixed1
-rw-r--r--tests/ui/rust-2018/suggestions-not-always-applicable.rs1
-rw-r--r--tests/ui/rust-2021/reserved-prefixes-via-macro.rs1
-rw-r--r--tests/ui/rust-2024/reserved-guarded-strings-via-macro.rs1
-rw-r--r--tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-from-pm.rs1
-rw-r--r--tests/ui/sanitizer/cfi/transparent-has-regions.rs1
-rw-r--r--tests/ui/sanitizer/issue-111184-cfi-coroutine-witness.rs1
-rw-r--r--tests/ui/sepcomp/sepcomp-lib-lto.rs1
-rw-r--r--tests/ui/sepcomp/sepcomp-unwind.rs1
-rw-r--r--tests/ui/simd/intrinsic/generic-arithmetic-2.rs1
-rw-r--r--tests/ui/simd/intrinsic/generic-arithmetic-2.stderr56
-rw-r--r--tests/ui/simd/intrinsic/generic-elements.rs1
-rw-r--r--tests/ui/simd/intrinsic/generic-elements.stderr42
-rw-r--r--tests/ui/simd/masked-load-store-build-fail.rs1
-rw-r--r--tests/ui/simd/masked-load-store-build-fail.stderr16
-rw-r--r--tests/ui/simd/monomorphize-shuffle-index.generic.stderr2
-rw-r--r--tests/ui/simd/monomorphize-shuffle-index.rs1
-rw-r--r--tests/ui/simd/not-out-of-bounds.rs1
-rw-r--r--tests/ui/simd/not-out-of-bounds.stderr18
-rw-r--r--tests/ui/span/issue-42234-unknown-receiver-type.stderr4
-rw-r--r--tests/ui/structs-enums/unit-like-struct-drop-run.rs1
-rw-r--r--tests/ui/suggestions/issue-61963.rs1
-rw-r--r--tests/ui/suggestions/issue-61963.stderr6
-rw-r--r--tests/ui/suggestions/issue-97760.stderr7
-rw-r--r--tests/ui/suggestions/suggest-ref-macro.rs1
-rw-r--r--tests/ui/suggestions/suggest-ref-macro.stderr12
-rw-r--r--tests/ui/test-attrs/test-panic-while-printing.rs1
-rw-r--r--tests/ui/threads-sendsync/task-stderr.rs1
-rw-r--r--tests/ui/threads-sendsync/unwind-resource.rs1
-rw-r--r--tests/ui/track-diagnostics/track.rs7
-rw-r--r--tests/ui/track-diagnostics/track.stderr6
-rw-r--r--tests/ui/traits/clone-unwind-rc-cleanup.rs1
-rw-r--r--tests/ui/type-alias-impl-trait/closures_in_branches.stderr4
-rw-r--r--tests/ui/type-alias-impl-trait/method_resolution_trait_method_from_opaque.next.stderr10
-rw-r--r--tests/ui/type-inference/regression-issue-81317.stderr2
-rw-r--r--tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.rs1
-rw-r--r--tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.stderr2
-rw-r--r--tests/ui/typeck/issue-13853.rs2
-rw-r--r--tests/ui/typeck/issue-13853.stderr12
-rw-r--r--tests/ui/unpretty/exhaustive.hir.stdout3
-rw-r--r--tests/ui/unpretty/flattened-format-args.stdout3
399 files changed, 3202 insertions, 2299 deletions
diff --git a/compiler/rustc_ast_lowering/src/format.rs b/compiler/rustc_ast_lowering/src/format.rs
index ec9d26eb33f..2871430030c 100644
--- a/compiler/rustc_ast_lowering/src/format.rs
+++ b/compiler/rustc_ast_lowering/src/format.rs
@@ -487,26 +487,6 @@ fn expand_format_args<'hir>(
         // Generate:
         //     []
         (vec![], ctx.arena.alloc(ctx.expr(macsp, hir::ExprKind::Array(&[]))))
-    } else if argmap.len() == 1 && arguments.len() == 1 {
-        // Only one argument, so we don't need to make the `args` tuple.
-        //
-        // Generate:
-        //     super let args = [<core::fmt::Argument>::new_display(&arg)];
-        let args = ctx.arena.alloc_from_iter(argmap.iter().map(
-            |(&(arg_index, ty), &placeholder_span)| {
-                let arg = &arguments[arg_index];
-                let placeholder_span =
-                    placeholder_span.unwrap_or(arg.expr.span).with_ctxt(macsp.ctxt());
-                let arg = ctx.lower_expr(&arg.expr);
-                let ref_arg = ctx.arena.alloc(ctx.expr_ref(arg.span.with_ctxt(macsp.ctxt()), arg));
-                make_argument(ctx, placeholder_span, ref_arg, ty)
-            },
-        ));
-        let args = ctx.arena.alloc(ctx.expr(macsp, hir::ExprKind::Array(args)));
-        let args_ident = Ident::new(sym::args, macsp);
-        let (args_pat, args_hir_id) = ctx.pat_ident(macsp, args_ident);
-        let let_statement = ctx.stmt_super_let_pat(macsp, args_pat, Some(args));
-        (vec![let_statement], ctx.arena.alloc(ctx.expr_ident_mut(macsp, args_ident, args_hir_id)))
     } else {
         // Generate:
         //     super let args = (&arg0, &arg1, &…);
diff --git a/compiler/rustc_attr_parsing/src/attributes/debugger.rs b/compiler/rustc_attr_parsing/src/attributes/debugger.rs
new file mode 100644
index 00000000000..56ff10be426
--- /dev/null
+++ b/compiler/rustc_attr_parsing/src/attributes/debugger.rs
@@ -0,0 +1,60 @@
+use rustc_hir::attrs::{DebugVisualizer, DebuggerVisualizerType};
+
+use super::prelude::*;
+
+pub(crate) struct DebuggerViualizerParser;
+
+impl<S: Stage> CombineAttributeParser<S> for DebuggerViualizerParser {
+    const PATH: &[Symbol] = &[sym::debugger_visualizer];
+    const ALLOWED_TARGETS: AllowedTargets =
+        AllowedTargets::AllowList(&[Allow(Target::Mod), Allow(Target::Crate)]);
+    const TEMPLATE: AttributeTemplate = template!(
+        List: &[r#"natvis_file = "...", gdb_script_file = "...""#],
+        "https://doc.rust-lang.org/reference/attributes/debugger.html#the-debugger_visualizer-attribute"
+    );
+
+    type Item = DebugVisualizer;
+    const CONVERT: ConvertFn<Self::Item> = |v, _| AttributeKind::DebuggerVisualizer(v);
+
+    fn extend<'c>(
+        cx: &'c mut AcceptContext<'_, '_, S>,
+        args: &'c ArgParser<'_>,
+    ) -> impl IntoIterator<Item = Self::Item> + 'c {
+        let Some(l) = args.list() else {
+            cx.expected_list(args.span().unwrap_or(cx.attr_span));
+            return None;
+        };
+        let Some(single) = l.single() else {
+            cx.expected_single_argument(l.span);
+            return None;
+        };
+        let Some(mi) = single.meta_item() else {
+            cx.expected_name_value(single.span(), None);
+            return None;
+        };
+        let path = mi.path().word_sym();
+        let visualizer_type = match path {
+            Some(sym::natvis_file) => DebuggerVisualizerType::Natvis,
+            Some(sym::gdb_script_file) => DebuggerVisualizerType::GdbPrettyPrinter,
+            _ => {
+                cx.expected_specific_argument(
+                    mi.path().span(),
+                    &[sym::natvis_file, sym::gdb_script_file],
+                );
+                return None;
+            }
+        };
+
+        let Some(path) = mi.args().name_value() else {
+            cx.expected_name_value(single.span(), path);
+            return None;
+        };
+
+        let Some(path) = path.value_as_str() else {
+            cx.expected_string_literal(path.value_span, Some(path.value_as_lit()));
+            return None;
+        };
+
+        Some(DebugVisualizer { span: mi.span(), visualizer_type, path })
+    }
+}
diff --git a/compiler/rustc_attr_parsing/src/attributes/mod.rs b/compiler/rustc_attr_parsing/src/attributes/mod.rs
index 4ed13d239b9..8dbf4c0ef32 100644
--- a/compiler/rustc_attr_parsing/src/attributes/mod.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/mod.rs
@@ -36,6 +36,7 @@ pub(crate) mod cfg_old;
 pub(crate) mod codegen_attrs;
 pub(crate) mod confusables;
 pub(crate) mod crate_level;
+pub(crate) mod debugger;
 pub(crate) mod deprecation;
 pub(crate) mod dummy;
 pub(crate) mod inline;
diff --git a/compiler/rustc_attr_parsing/src/context.rs b/compiler/rustc_attr_parsing/src/context.rs
index de1ab5e9578..d7ccf3c7806 100644
--- a/compiler/rustc_attr_parsing/src/context.rs
+++ b/compiler/rustc_attr_parsing/src/context.rs
@@ -28,6 +28,7 @@ use crate::attributes::crate_level::{
     CrateNameParser, MoveSizeLimitParser, NoCoreParser, NoStdParser, PatternComplexityLimitParser,
     RecursionLimitParser, RustcCoherenceIsCoreParser, TypeLengthLimitParser,
 };
+use crate::attributes::debugger::DebuggerViualizerParser;
 use crate::attributes::deprecation::DeprecationParser;
 use crate::attributes::dummy::DummyParser;
 use crate::attributes::inline::{InlineParser, RustcForceInlineParser};
@@ -163,6 +164,7 @@ attribute_parsers!(
         // tidy-alphabetical-start
         Combine<AllowConstFnUnstableParser>,
         Combine<AllowInternalUnstableParser>,
+        Combine<DebuggerViualizerParser>,
         Combine<ForceTargetFeatureParser>,
         Combine<LinkParser>,
         Combine<ReprParser>,
diff --git a/compiler/rustc_codegen_llvm/src/abi.rs b/compiler/rustc_codegen_llvm/src/abi.rs
index 11be7041167..861227f7c2a 100644
--- a/compiler/rustc_codegen_llvm/src/abi.rs
+++ b/compiler/rustc_codegen_llvm/src/abi.rs
@@ -538,7 +538,13 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
 
         // If the declaration has an associated instance, compute extra attributes based on that.
         if let Some(instance) = instance {
-            llfn_attrs_from_instance(cx, llfn, instance);
+            llfn_attrs_from_instance(
+                cx,
+                cx.tcx,
+                llfn,
+                &cx.tcx.codegen_instance_attrs(instance.def),
+                Some(instance),
+            );
         }
     }
 
diff --git a/compiler/rustc_codegen_llvm/src/allocator.rs b/compiler/rustc_codegen_llvm/src/allocator.rs
index df3e49279d9..abd63120397 100644
--- a/compiler/rustc_codegen_llvm/src/allocator.rs
+++ b/compiler/rustc_codegen_llvm/src/allocator.rs
@@ -5,15 +5,16 @@ use rustc_ast::expand::allocator::{
 };
 use rustc_codegen_ssa::traits::BaseTypeCodegenMethods as _;
 use rustc_middle::bug;
+use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::config::{DebugInfo, OomStrategy};
 use rustc_symbol_mangling::mangle_internal_symbol;
-use smallvec::SmallVec;
 
+use crate::attributes::llfn_attrs_from_instance;
 use crate::builder::SBuilder;
 use crate::declare::declare_simple_fn;
 use crate::llvm::{self, FALSE, TRUE, Type, Value};
-use crate::{SimpleCx, attributes, debuginfo, llvm_util};
+use crate::{SimpleCx, attributes, debuginfo};
 
 pub(crate) unsafe fn codegen(
     tcx: TyCtxt<'_>,
@@ -149,18 +150,8 @@ fn create_wrapper_function(
         ty,
     );
 
-    let mut attrs = SmallVec::<[_; 2]>::new();
-
-    let target_cpu = llvm_util::target_cpu(tcx.sess);
-    let target_cpu_attr = llvm::CreateAttrStringValue(cx.llcx, "target-cpu", target_cpu);
-
-    let tune_cpu_attr = llvm_util::tune_cpu(tcx.sess)
-        .map(|tune_cpu| llvm::CreateAttrStringValue(cx.llcx, "tune-cpu", tune_cpu));
-
-    attrs.push(target_cpu_attr);
-    attrs.extend(tune_cpu_attr);
-
-    attributes::apply_to_llfn(llfn, llvm::AttributePlace::Function, &attrs);
+    let attrs = CodegenFnAttrs::new();
+    llfn_attrs_from_instance(cx, tcx, llfn, &attrs, None);
 
     let no_return = if no_return {
         // -> ! DIFlagNoReturn
@@ -171,12 +162,6 @@ fn create_wrapper_function(
         None
     };
 
-    if tcx.sess.must_emit_unwind_tables() {
-        let uwtable =
-            attributes::uwtable_attr(cx.llcx, tcx.sess.opts.unstable_opts.use_sync_unwind);
-        attributes::apply_to_llfn(llfn, llvm::AttributePlace::Function, &[uwtable]);
-    }
-
     let llbb = unsafe { llvm::LLVMAppendBasicBlockInContext(cx.llcx, llfn, c"entry".as_ptr()) };
     let mut bx = SBuilder::build(&cx, llbb);
 
diff --git a/compiler/rustc_codegen_llvm/src/attributes.rs b/compiler/rustc_codegen_llvm/src/attributes.rs
index dcf6b945497..8070ea0b3e9 100644
--- a/compiler/rustc_codegen_llvm/src/attributes.rs
+++ b/compiler/rustc_codegen_llvm/src/attributes.rs
@@ -1,20 +1,21 @@
 //! Set and unset common attributes on LLVM values.
-use rustc_codegen_ssa::traits::*;
 use rustc_hir::attrs::{InlineAttr, InstructionSetAttr, OptimizeAttr};
 use rustc_hir::def_id::DefId;
-use rustc_middle::middle::codegen_fn_attrs::{CodegenFnAttrFlags, PatchableFunctionEntry};
+use rustc_middle::middle::codegen_fn_attrs::{
+    CodegenFnAttrFlags, CodegenFnAttrs, PatchableFunctionEntry,
+};
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_session::config::{BranchProtection, FunctionReturn, OptLevel, PAuthKey, PacRet};
 use rustc_symbol_mangling::mangle_internal_symbol;
 use rustc_target::spec::{FramePointer, SanitizerSet, StackProbeType, StackProtector};
 use smallvec::SmallVec;
 
-use crate::context::CodegenCx;
+use crate::context::SimpleCx;
 use crate::errors::SanitizerMemtagRequiresMte;
 use crate::llvm::AttributePlace::Function;
 use crate::llvm::{self, AllocKindFlags, Attribute, AttributeKind, AttributePlace, MemoryEffects};
 use crate::value::Value;
-use crate::{attributes, llvm_util};
+use crate::{Session, attributes, llvm_util};
 
 pub(crate) fn apply_to_llfn(llfn: &Value, idx: AttributePlace, attrs: &[&Attribute]) {
     if !attrs.is_empty() {
@@ -30,18 +31,19 @@ pub(crate) fn apply_to_callsite(callsite: &Value, idx: AttributePlace, attrs: &[
 
 /// Get LLVM attribute for the provided inline heuristic.
 pub(crate) fn inline_attr<'ll, 'tcx>(
-    cx: &CodegenCx<'ll, 'tcx>,
+    cx: &SimpleCx<'ll>,
+    tcx: TyCtxt<'tcx>,
     instance: ty::Instance<'tcx>,
 ) -> Option<&'ll Attribute> {
     // `optnone` requires `noinline`
-    let codegen_fn_attrs = cx.tcx.codegen_fn_attrs(instance.def_id());
+    let codegen_fn_attrs = tcx.codegen_fn_attrs(instance.def_id());
     let inline = match (codegen_fn_attrs.inline, &codegen_fn_attrs.optimize) {
         (_, OptimizeAttr::DoNotOptimize) => InlineAttr::Never,
-        (InlineAttr::None, _) if instance.def.requires_inline(cx.tcx) => InlineAttr::Hint,
+        (InlineAttr::None, _) if instance.def.requires_inline(tcx) => InlineAttr::Hint,
         (inline, _) => inline,
     };
 
-    if !cx.tcx.sess.opts.unstable_opts.inline_llvm {
+    if !tcx.sess.opts.unstable_opts.inline_llvm {
         // disable LLVM inlining
         return Some(AttributeKind::NoInline.create_attr(cx.llcx));
     }
@@ -51,7 +53,7 @@ pub(crate) fn inline_attr<'ll, 'tcx>(
             Some(AttributeKind::AlwaysInline.create_attr(cx.llcx))
         }
         InlineAttr::Never => {
-            if cx.sess().target.arch != "amdgpu" {
+            if tcx.sess.target.arch != "amdgpu" {
                 Some(AttributeKind::NoInline.create_attr(cx.llcx))
             } else {
                 None
@@ -63,12 +65,13 @@ pub(crate) fn inline_attr<'ll, 'tcx>(
 
 #[inline]
 fn patchable_function_entry_attrs<'ll>(
-    cx: &CodegenCx<'ll, '_>,
+    cx: &SimpleCx<'ll>,
+    sess: &Session,
     attr: Option<PatchableFunctionEntry>,
 ) -> SmallVec<[&'ll Attribute; 2]> {
     let mut attrs = SmallVec::new();
     let patchable_spec = attr.unwrap_or_else(|| {
-        PatchableFunctionEntry::from_config(cx.tcx.sess.opts.unstable_opts.patchable_function_entry)
+        PatchableFunctionEntry::from_config(sess.opts.unstable_opts.patchable_function_entry)
     });
     let entry = patchable_spec.entry();
     let prefix = patchable_spec.prefix();
@@ -91,12 +94,13 @@ fn patchable_function_entry_attrs<'ll>(
 
 /// Get LLVM sanitize attributes.
 #[inline]
-pub(crate) fn sanitize_attrs<'ll>(
-    cx: &CodegenCx<'ll, '_>,
+pub(crate) fn sanitize_attrs<'ll, 'tcx>(
+    cx: &SimpleCx<'ll>,
+    tcx: TyCtxt<'tcx>,
     no_sanitize: SanitizerSet,
 ) -> SmallVec<[&'ll Attribute; 4]> {
     let mut attrs = SmallVec::new();
-    let enabled = cx.tcx.sess.opts.unstable_opts.sanitizer - no_sanitize;
+    let enabled = tcx.sess.opts.unstable_opts.sanitizer - no_sanitize;
     if enabled.contains(SanitizerSet::ADDRESS) || enabled.contains(SanitizerSet::KERNELADDRESS) {
         attrs.push(llvm::AttributeKind::SanitizeAddress.create_attr(cx.llcx));
     }
@@ -114,11 +118,11 @@ pub(crate) fn sanitize_attrs<'ll>(
     }
     if enabled.contains(SanitizerSet::MEMTAG) {
         // Check to make sure the mte target feature is actually enabled.
-        let features = cx.tcx.global_backend_features(());
+        let features = tcx.global_backend_features(());
         let mte_feature =
             features.iter().map(|s| &s[..]).rfind(|n| ["+mte", "-mte"].contains(&&n[..]));
         if let None | Some("-mte") = mte_feature {
-            cx.tcx.dcx().emit_err(SanitizerMemtagRequiresMte);
+            tcx.dcx().emit_err(SanitizerMemtagRequiresMte);
         }
 
         attrs.push(llvm::AttributeKind::SanitizeMemTag.create_attr(cx.llcx));
@@ -139,9 +143,12 @@ pub(crate) fn uwtable_attr(llcx: &llvm::Context, use_sync_unwind: Option<bool>)
     llvm::CreateUWTableAttr(llcx, async_unwind)
 }
 
-pub(crate) fn frame_pointer_type_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
-    let mut fp = cx.sess().target.frame_pointer;
-    let opts = &cx.sess().opts;
+pub(crate) fn frame_pointer_type_attr<'ll>(
+    cx: &SimpleCx<'ll>,
+    sess: &Session,
+) -> Option<&'ll Attribute> {
+    let mut fp = sess.target.frame_pointer;
+    let opts = &sess.opts;
     // "mcount" function relies on stack pointer.
     // See <https://sourceware.org/binutils/docs/gprof/Implementation.html>.
     if opts.unstable_opts.instrument_mcount {
@@ -156,8 +163,8 @@ pub(crate) fn frame_pointer_type_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'
     Some(llvm::CreateAttrStringValue(cx.llcx, "frame-pointer", attr_value))
 }
 
-fn function_return_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
-    let function_return_attr = match cx.sess().opts.unstable_opts.function_return {
+fn function_return_attr<'ll>(cx: &SimpleCx<'ll>, sess: &Session) -> Option<&'ll Attribute> {
+    let function_return_attr = match sess.opts.unstable_opts.function_return {
         FunctionReturn::Keep => return None,
         FunctionReturn::ThunkExtern => AttributeKind::FnRetThunkExtern,
     };
@@ -167,17 +174,20 @@ fn function_return_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute>
 
 /// Tell LLVM what instrument function to insert.
 #[inline]
-fn instrument_function_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> SmallVec<[&'ll Attribute; 4]> {
+fn instrument_function_attr<'ll>(
+    cx: &SimpleCx<'ll>,
+    sess: &Session,
+) -> SmallVec<[&'ll Attribute; 4]> {
     let mut attrs = SmallVec::new();
-    if cx.sess().opts.unstable_opts.instrument_mcount {
+    if sess.opts.unstable_opts.instrument_mcount {
         // Similar to `clang -pg` behavior. Handled by the
         // `post-inline-ee-instrument` LLVM pass.
 
         // The function name varies on platforms.
         // See test/CodeGen/mcount.c in clang.
-        let mcount_name = match &cx.sess().target.llvm_mcount_intrinsic {
+        let mcount_name = match &sess.target.llvm_mcount_intrinsic {
             Some(llvm_mcount_intrinsic) => llvm_mcount_intrinsic.as_ref(),
-            None => cx.sess().target.mcount.as_ref(),
+            None => sess.target.mcount.as_ref(),
         };
 
         attrs.push(llvm::CreateAttrStringValue(
@@ -186,7 +196,7 @@ fn instrument_function_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> SmallVec<[&'ll Attr
             mcount_name,
         ));
     }
-    if let Some(options) = &cx.sess().opts.unstable_opts.instrument_xray {
+    if let Some(options) = &sess.opts.unstable_opts.instrument_xray {
         // XRay instrumentation is similar to __cyg_profile_func_{enter,exit}.
         // Function prologue and epilogue are instrumented with NOP sleds,
         // a runtime library later replaces them with detours into tracing code.
@@ -217,20 +227,20 @@ fn instrument_function_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> SmallVec<[&'ll Attr
     attrs
 }
 
-fn nojumptables_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
-    if !cx.sess().opts.unstable_opts.no_jump_tables {
+fn nojumptables_attr<'ll>(cx: &SimpleCx<'ll>, sess: &Session) -> Option<&'ll Attribute> {
+    if !sess.opts.unstable_opts.no_jump_tables {
         return None;
     }
 
     Some(llvm::CreateAttrStringValue(cx.llcx, "no-jump-tables", "true"))
 }
 
-fn probestack_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
+fn probestack_attr<'ll, 'tcx>(cx: &SimpleCx<'ll>, tcx: TyCtxt<'tcx>) -> Option<&'ll Attribute> {
     // Currently stack probes seem somewhat incompatible with the address
     // sanitizer and thread sanitizer. With asan we're already protected from
     // stack overflow anyway so we don't really need stack probes regardless.
-    if cx
-        .sess()
+    if tcx
+        .sess
         .opts
         .unstable_opts
         .sanitizer
@@ -240,22 +250,22 @@ fn probestack_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
     }
 
     // probestack doesn't play nice either with `-C profile-generate`.
-    if cx.sess().opts.cg.profile_generate.enabled() {
+    if tcx.sess.opts.cg.profile_generate.enabled() {
         return None;
     }
 
-    let attr_value = match cx.sess().target.stack_probes {
+    let attr_value = match tcx.sess.target.stack_probes {
         StackProbeType::None => return None,
         // Request LLVM to generate the probes inline. If the given LLVM version does not support
         // this, no probe is generated at all (even if the attribute is specified).
         StackProbeType::Inline => "inline-asm",
         // Flag our internal `__rust_probestack` function as the stack probe symbol.
         // This is defined in the `compiler-builtins` crate for each architecture.
-        StackProbeType::Call => &mangle_internal_symbol(cx.tcx, "__rust_probestack"),
+        StackProbeType::Call => &mangle_internal_symbol(tcx, "__rust_probestack"),
         // Pick from the two above based on the LLVM version.
         StackProbeType::InlineOrCall { min_llvm_version_for_inline } => {
             if llvm_util::get_version() < min_llvm_version_for_inline {
-                &mangle_internal_symbol(cx.tcx, "__rust_probestack")
+                &mangle_internal_symbol(tcx, "__rust_probestack")
             } else {
                 "inline-asm"
             }
@@ -264,8 +274,8 @@ fn probestack_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
     Some(llvm::CreateAttrStringValue(cx.llcx, "probe-stack", attr_value))
 }
 
-fn stackprotector_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
-    let sspattr = match cx.sess().stack_protector() {
+fn stackprotector_attr<'ll>(cx: &SimpleCx<'ll>, sess: &Session) -> Option<&'ll Attribute> {
+    let sspattr = match sess.stack_protector() {
         StackProtector::None => return None,
         StackProtector::All => AttributeKind::StackProtectReq,
         StackProtector::Strong => AttributeKind::StackProtectStrong,
@@ -275,33 +285,34 @@ fn stackprotector_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
     Some(sspattr.create_attr(cx.llcx))
 }
 
-fn backchain_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
-    if cx.sess().target.arch != "s390x" {
+fn backchain_attr<'ll>(cx: &SimpleCx<'ll>, sess: &Session) -> Option<&'ll Attribute> {
+    if sess.target.arch != "s390x" {
         return None;
     }
 
-    let requested_features = cx.sess().opts.cg.target_feature.split(',');
+    let requested_features = sess.opts.cg.target_feature.split(',');
     let found_positive = requested_features.clone().any(|r| r == "+backchain");
 
     if found_positive { Some(llvm::CreateAttrString(cx.llcx, "backchain")) } else { None }
 }
 
-pub(crate) fn target_cpu_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> &'ll Attribute {
-    let target_cpu = llvm_util::target_cpu(cx.tcx.sess);
+pub(crate) fn target_cpu_attr<'ll>(cx: &SimpleCx<'ll>, sess: &Session) -> &'ll Attribute {
+    let target_cpu = llvm_util::target_cpu(sess);
     llvm::CreateAttrStringValue(cx.llcx, "target-cpu", target_cpu)
 }
 
-pub(crate) fn tune_cpu_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
-    llvm_util::tune_cpu(cx.tcx.sess)
+pub(crate) fn tune_cpu_attr<'ll>(cx: &SimpleCx<'ll>, sess: &Session) -> Option<&'ll Attribute> {
+    llvm_util::tune_cpu(sess)
         .map(|tune_cpu| llvm::CreateAttrStringValue(cx.llcx, "tune-cpu", tune_cpu))
 }
 
 /// Get the `target-features` LLVM attribute.
-pub(crate) fn target_features_attr<'ll>(
-    cx: &CodegenCx<'ll, '_>,
+pub(crate) fn target_features_attr<'ll, 'tcx>(
+    cx: &SimpleCx<'ll>,
+    tcx: TyCtxt<'tcx>,
     function_features: Vec<String>,
 ) -> Option<&'ll Attribute> {
-    let global_features = cx.tcx.global_backend_features(()).iter().map(String::as_str);
+    let global_features = tcx.global_backend_features(()).iter().map(String::as_str);
     let function_features = function_features.iter().map(String::as_str);
     let target_features =
         global_features.chain(function_features).intersperse(",").collect::<String>();
@@ -311,22 +322,22 @@ pub(crate) fn target_features_attr<'ll>(
 
 /// Get the `NonLazyBind` LLVM attribute,
 /// if the codegen options allow skipping the PLT.
-pub(crate) fn non_lazy_bind_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
+pub(crate) fn non_lazy_bind_attr<'ll>(
+    cx: &SimpleCx<'ll>,
+    sess: &Session,
+) -> Option<&'ll Attribute> {
     // Don't generate calls through PLT if it's not necessary
-    if !cx.sess().needs_plt() {
-        Some(AttributeKind::NonLazyBind.create_attr(cx.llcx))
-    } else {
-        None
-    }
+    if !sess.needs_plt() { Some(AttributeKind::NonLazyBind.create_attr(cx.llcx)) } else { None }
 }
 
 /// Get the default optimizations attrs for a function.
 #[inline]
 pub(crate) fn default_optimisation_attrs<'ll>(
-    cx: &CodegenCx<'ll, '_>,
+    cx: &SimpleCx<'ll>,
+    sess: &Session,
 ) -> SmallVec<[&'ll Attribute; 2]> {
     let mut attrs = SmallVec::new();
-    match cx.sess().opts.optimize {
+    match sess.opts.optimize {
         OptLevel::Size => {
             attrs.push(llvm::AttributeKind::OptimizeForSize.create_attr(cx.llcx));
         }
@@ -347,17 +358,18 @@ fn create_alloc_family_attr(llcx: &llvm::Context) -> &llvm::Attribute {
 /// Composite function which sets LLVM attributes for function depending on its AST (`#[attribute]`)
 /// attributes.
 pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
-    cx: &CodegenCx<'ll, 'tcx>,
+    cx: &SimpleCx<'ll>,
+    tcx: TyCtxt<'tcx>,
     llfn: &'ll Value,
-    instance: ty::Instance<'tcx>,
+    codegen_fn_attrs: &CodegenFnAttrs,
+    instance: Option<ty::Instance<'tcx>>,
 ) {
-    let codegen_fn_attrs = cx.tcx.codegen_instance_attrs(instance.def);
-
+    let sess = tcx.sess;
     let mut to_add = SmallVec::<[_; 16]>::new();
 
     match codegen_fn_attrs.optimize {
         OptimizeAttr::Default => {
-            to_add.extend(default_optimisation_attrs(cx));
+            to_add.extend(default_optimisation_attrs(cx, sess));
         }
         OptimizeAttr::DoNotOptimize => {
             to_add.push(llvm::AttributeKind::OptimizeNone.create_attr(cx.llcx));
@@ -369,21 +381,21 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
         OptimizeAttr::Speed => {}
     }
 
-    if cx.sess().must_emit_unwind_tables() {
-        to_add.push(uwtable_attr(cx.llcx, cx.sess().opts.unstable_opts.use_sync_unwind));
+    if sess.must_emit_unwind_tables() {
+        to_add.push(uwtable_attr(cx.llcx, sess.opts.unstable_opts.use_sync_unwind));
     }
 
-    if cx.sess().opts.unstable_opts.profile_sample_use.is_some() {
+    if sess.opts.unstable_opts.profile_sample_use.is_some() {
         to_add.push(llvm::CreateAttrString(cx.llcx, "use-sample-profile"));
     }
 
     // FIXME: none of these functions interact with source level attributes.
-    to_add.extend(frame_pointer_type_attr(cx));
-    to_add.extend(function_return_attr(cx));
-    to_add.extend(instrument_function_attr(cx));
-    to_add.extend(nojumptables_attr(cx));
-    to_add.extend(probestack_attr(cx));
-    to_add.extend(stackprotector_attr(cx));
+    to_add.extend(frame_pointer_type_attr(cx, sess));
+    to_add.extend(function_return_attr(cx, sess));
+    to_add.extend(instrument_function_attr(cx, sess));
+    to_add.extend(nojumptables_attr(cx, sess));
+    to_add.extend(probestack_attr(cx, tcx));
+    to_add.extend(stackprotector_attr(cx, sess));
 
     if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::NO_BUILTINS) {
         to_add.push(llvm::CreateAttrString(cx.llcx, "no-builtins"));
@@ -404,13 +416,13 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
         // not used.
     } else {
         // Do not set sanitizer attributes for naked functions.
-        to_add.extend(sanitize_attrs(cx, codegen_fn_attrs.no_sanitize));
+        to_add.extend(sanitize_attrs(cx, tcx, codegen_fn_attrs.no_sanitize));
 
         // For non-naked functions, set branch protection attributes on aarch64.
         if let Some(BranchProtection { bti, pac_ret, gcs }) =
-            cx.sess().opts.unstable_opts.branch_protection
+            sess.opts.unstable_opts.branch_protection
         {
-            assert!(cx.sess().target.arch == "aarch64");
+            assert!(sess.target.arch == "aarch64");
             if bti {
                 to_add.push(llvm::CreateAttrString(cx.llcx, "branch-target-enforcement"));
             }
@@ -438,14 +450,15 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
         || codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::ALLOCATOR_ZEROED)
     {
         to_add.push(create_alloc_family_attr(cx.llcx));
-        if let Some(zv) =
-            cx.tcx.get_attr(instance.def_id(), rustc_span::sym::rustc_allocator_zeroed_variant)
+        if let Some(instance) = instance
+            && let Some(zv) =
+                tcx.get_attr(instance.def_id(), rustc_span::sym::rustc_allocator_zeroed_variant)
             && let Some(name) = zv.value_str()
         {
             to_add.push(llvm::CreateAttrStringValue(
                 cx.llcx,
                 "alloc-variant-zeroed",
-                &mangle_internal_symbol(cx.tcx, name.as_str()),
+                &mangle_internal_symbol(tcx, name.as_str()),
             ));
         }
         // apply to argument place instead of function
@@ -490,18 +503,22 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
     if let Some(align) = codegen_fn_attrs.alignment {
         llvm::set_alignment(llfn, align);
     }
-    if let Some(backchain) = backchain_attr(cx) {
+    if let Some(backchain) = backchain_attr(cx, sess) {
         to_add.push(backchain);
     }
-    to_add.extend(patchable_function_entry_attrs(cx, codegen_fn_attrs.patchable_function_entry));
+    to_add.extend(patchable_function_entry_attrs(
+        cx,
+        sess,
+        codegen_fn_attrs.patchable_function_entry,
+    ));
 
     // Always annotate functions with the target-cpu they are compiled for.
     // Without this, ThinLTO won't inline Rust functions into Clang generated
     // functions (because Clang annotates functions this way too).
-    to_add.push(target_cpu_attr(cx));
+    to_add.push(target_cpu_attr(cx, sess));
     // tune-cpu is only conveyed through the attribute for our purpose.
     // The target doesn't care; the subtarget reads our attribute.
-    to_add.extend(tune_cpu_attr(cx));
+    to_add.extend(tune_cpu_attr(cx, sess));
 
     let function_features =
         codegen_fn_attrs.target_features.iter().map(|f| f.name.as_str()).collect::<Vec<&str>>();
@@ -509,7 +526,9 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
     // Apply function attributes as per usual if there are no user defined
     // target features otherwise this will get applied at the callsite.
     if function_features.is_empty() {
-        if let Some(inline_attr) = inline_attr(cx, instance) {
+        if let Some(instance) = instance
+            && let Some(inline_attr) = inline_attr(cx, tcx, instance)
+        {
             to_add.push(inline_attr);
         }
     }
@@ -517,7 +536,7 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
     let function_features = function_features
         .iter()
         // Convert to LLVMFeatures and filter out unavailable ones
-        .flat_map(|feat| llvm_util::to_llvm_features(cx.tcx.sess, feat))
+        .flat_map(|feat| llvm_util::to_llvm_features(sess, feat))
         // Convert LLVMFeatures & dependencies to +<feats>s
         .flat_map(|feat| feat.into_iter().map(|f| format!("+{f}")))
         .chain(codegen_fn_attrs.instruction_set.iter().map(|x| match x {
@@ -526,20 +545,22 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
         }))
         .collect::<Vec<String>>();
 
-    if cx.tcx.sess.target.is_like_wasm {
+    if sess.target.is_like_wasm {
         // If this function is an import from the environment but the wasm
         // import has a specific module/name, apply them here.
-        if let Some(module) = wasm_import_module(cx.tcx, instance.def_id()) {
+        if let Some(instance) = instance
+            && let Some(module) = wasm_import_module(tcx, instance.def_id())
+        {
             to_add.push(llvm::CreateAttrStringValue(cx.llcx, "wasm-import-module", module));
 
             let name =
-                codegen_fn_attrs.symbol_name.unwrap_or_else(|| cx.tcx.item_name(instance.def_id()));
+                codegen_fn_attrs.symbol_name.unwrap_or_else(|| tcx.item_name(instance.def_id()));
             let name = name.as_str();
             to_add.push(llvm::CreateAttrStringValue(cx.llcx, "wasm-import-name", name));
         }
     }
 
-    to_add.extend(target_features_attr(cx, function_features));
+    to_add.extend(target_features_attr(cx, tcx, function_features));
 
     attributes::apply_to_llfn(llfn, Function, &to_add);
 }
diff --git a/compiler/rustc_codegen_llvm/src/base.rs b/compiler/rustc_codegen_llvm/src/base.rs
index 978134cc32b..6d12b511e9c 100644
--- a/compiler/rustc_codegen_llvm/src/base.rs
+++ b/compiler/rustc_codegen_llvm/src/base.rs
@@ -105,7 +105,7 @@ pub(crate) fn compile_codegen_unit(
             if let Some(entry) =
                 maybe_create_entry_wrapper::<Builder<'_, '_, '_>>(&cx, cx.codegen_unit)
             {
-                let attrs = attributes::sanitize_attrs(&cx, SanitizerSet::empty());
+                let attrs = attributes::sanitize_attrs(&cx, tcx, SanitizerSet::empty());
                 attributes::apply_to_llfn(entry, llvm::AttributePlace::Function, &attrs);
             }
 
diff --git a/compiler/rustc_codegen_llvm/src/builder.rs b/compiler/rustc_codegen_llvm/src/builder.rs
index 0f17cc9063a..a4dc4eb532f 100644
--- a/compiler/rustc_codegen_llvm/src/builder.rs
+++ b/compiler/rustc_codegen_llvm/src/builder.rs
@@ -1433,7 +1433,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
                 // If there is an inline attribute and a target feature that matches
                 // we will add the attribute to the callsite otherwise we'll omit
                 // this and not add the attribute to prevent soundness issues.
-                && let Some(inlining_rule) = attributes::inline_attr(&self.cx, instance)
+                && let Some(inlining_rule) = attributes::inline_attr(&self.cx, self.cx.tcx, instance)
                 && self.cx.tcx.is_target_feature_call_safe(
                     &fn_call_attrs.target_features,
                     &fn_defn_attrs.target_features,
diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs
index b7d2241da47..aa5c17269fb 100644
--- a/compiler/rustc_codegen_llvm/src/context.rs
+++ b/compiler/rustc_codegen_llvm/src/context.rs
@@ -876,7 +876,7 @@ impl<'ll, 'tcx> MiscCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                 } else {
                     let fty = self.type_variadic_func(&[], self.type_i32());
                     let llfn = self.declare_cfn(name, llvm::UnnamedAddr::Global, fty);
-                    let target_cpu = attributes::target_cpu_attr(self);
+                    let target_cpu = attributes::target_cpu_attr(self, self.sess());
                     attributes::apply_to_llfn(llfn, llvm::AttributePlace::Function, &[target_cpu]);
                     llfn
                 }
@@ -891,15 +891,15 @@ impl<'ll, 'tcx> MiscCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
     }
 
     fn set_frame_pointer_type(&self, llfn: &'ll Value) {
-        if let Some(attr) = attributes::frame_pointer_type_attr(self) {
+        if let Some(attr) = attributes::frame_pointer_type_attr(self, self.sess()) {
             attributes::apply_to_llfn(llfn, llvm::AttributePlace::Function, &[attr]);
         }
     }
 
     fn apply_target_cpu_attr(&self, llfn: &'ll Value) {
         let mut attrs = SmallVec::<[_; 2]>::new();
-        attrs.push(attributes::target_cpu_attr(self));
-        attrs.extend(attributes::tune_cpu_attr(self));
+        attrs.push(attributes::target_cpu_attr(self, self.sess()));
+        attrs.extend(attributes::tune_cpu_attr(self, self.sess()));
         attributes::apply_to_llfn(llfn, llvm::AttributePlace::Function, &attrs);
     }
 
@@ -918,7 +918,7 @@ impl<'ll, 'tcx> MiscCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
             attributes::apply_to_llfn(
                 llfn,
                 llvm::AttributePlace::Function,
-                attributes::target_features_attr(self, vec![]).as_slice(),
+                attributes::target_features_attr(self, self.tcx, vec![]).as_slice(),
             );
             Some(llfn)
         } else {
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs b/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs
index 7a6dc008c7b..3081badb821 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs
@@ -2,9 +2,9 @@
 
 use rustc_codegen_ssa::base::collect_debugger_visualizers_transitive;
 use rustc_codegen_ssa::traits::*;
+use rustc_hir::attrs::DebuggerVisualizerType;
 use rustc_hir::def_id::LOCAL_CRATE;
 use rustc_middle::bug;
-use rustc_middle::middle::debugger_visualizer::DebuggerVisualizerType;
 use rustc_session::config::{CrateType, DebugInfo};
 
 use crate::builder::Builder;
diff --git a/compiler/rustc_codegen_llvm/src/declare.rs b/compiler/rustc_codegen_llvm/src/declare.rs
index 960a895a203..36cdb498839 100644
--- a/compiler/rustc_codegen_llvm/src/declare.rs
+++ b/compiler/rustc_codegen_llvm/src/declare.rs
@@ -76,7 +76,7 @@ pub(crate) fn declare_raw_fn<'ll, 'tcx>(
         attrs.push(llvm::AttributeKind::NoRedZone.create_attr(cx.llcx));
     }
 
-    attrs.extend(attributes::non_lazy_bind_attr(cx));
+    attrs.extend(attributes::non_lazy_bind_attr(cx, cx.tcx.sess));
 
     attributes::apply_to_llfn(llfn, Function, &attrs);
 
diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs
index 68a2f43ec67..422b06350e1 100644
--- a/compiler/rustc_codegen_ssa/src/base.rs
+++ b/compiler/rustc_codegen_ssa/src/base.rs
@@ -11,12 +11,12 @@ use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
 use rustc_data_structures::profiling::{get_resident_set_size, print_time_passes_entry};
 use rustc_data_structures::sync::{IntoDynSyncSend, par_map};
 use rustc_data_structures::unord::UnordMap;
-use rustc_hir::attrs::OptimizeAttr;
+use rustc_hir::attrs::{DebuggerVisualizerType, OptimizeAttr};
 use rustc_hir::def_id::{DefId, LOCAL_CRATE};
 use rustc_hir::lang_items::LangItem;
 use rustc_hir::{ItemId, Target};
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs;
-use rustc_middle::middle::debugger_visualizer::{DebuggerVisualizerFile, DebuggerVisualizerType};
+use rustc_middle::middle::debugger_visualizer::DebuggerVisualizerFile;
 use rustc_middle::middle::dependency_format::Dependencies;
 use rustc_middle::middle::exported_symbols::{self, SymbolExportKind};
 use rustc_middle::middle::lang_items;
diff --git a/compiler/rustc_const_eval/src/lib.rs b/compiler/rustc_const_eval/src/lib.rs
index 8ace560d85d..9c0ec4e51a0 100644
--- a/compiler/rustc_const_eval/src/lib.rs
+++ b/compiler/rustc_const_eval/src/lib.rs
@@ -1,7 +1,6 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
-#![cfg_attr(bootstrap, feature(strict_overflow_ops))]
 #![doc(rust_logo)]
 #![feature(array_try_map)]
 #![feature(assert_matches)]
diff --git a/compiler/rustc_const_eval/src/util/caller_location.rs b/compiler/rustc_const_eval/src/util/caller_location.rs
index 5249b32eca4..4e7c8310007 100644
--- a/compiler/rustc_const_eval/src/util/caller_location.rs
+++ b/compiler/rustc_const_eval/src/util/caller_location.rs
@@ -61,7 +61,7 @@ pub(crate) fn const_caller_location_provider(
     trace!("const_caller_location: {}:{}:{}", file, line, col);
     let mut ecx = mk_eval_cx_to_read_const_val(
         tcx,
-        rustc_span::DUMMY_SP, // FIXME: use a proper span here?
+        rustc_span::DUMMY_SP, // This interpreter cannot fail, so the span is irrelevant.
         ty::TypingEnv::fully_monomorphized(),
         CanAccessMutGlobal::No,
     );
diff --git a/compiler/rustc_expand/src/base.rs b/compiler/rustc_expand/src/base.rs
index 3956125bace..33b712e3aed 100644
--- a/compiler/rustc_expand/src/base.rs
+++ b/compiler/rustc_expand/src/base.rs
@@ -324,16 +324,16 @@ pub trait BangProcMacro {
 
 impl<F> BangProcMacro for F
 where
-    F: Fn(TokenStream) -> TokenStream,
+    F: Fn(&mut ExtCtxt<'_>, Span, TokenStream) -> Result<TokenStream, ErrorGuaranteed>,
 {
     fn expand<'cx>(
         &self,
-        _ecx: &'cx mut ExtCtxt<'_>,
-        _span: Span,
+        ecx: &'cx mut ExtCtxt<'_>,
+        span: Span,
         ts: TokenStream,
     ) -> Result<TokenStream, ErrorGuaranteed> {
         // FIXME setup implicit context in TLS before calling self.
-        Ok(self(ts))
+        self(ecx, span, ts)
     }
 }
 
@@ -999,17 +999,14 @@ impl SyntaxExtension {
 
     /// A dummy bang macro `foo!()`.
     pub fn dummy_bang(edition: Edition) -> SyntaxExtension {
-        fn expander<'cx>(
-            cx: &'cx mut ExtCtxt<'_>,
+        fn expand(
+            ecx: &mut ExtCtxt<'_>,
             span: Span,
-            _: TokenStream,
-        ) -> MacroExpanderResult<'cx> {
-            ExpandResult::Ready(DummyResult::any(
-                span,
-                cx.dcx().span_delayed_bug(span, "expanded a dummy bang macro"),
-            ))
+            _ts: TokenStream,
+        ) -> Result<TokenStream, ErrorGuaranteed> {
+            Err(ecx.dcx().span_delayed_bug(span, "expanded a dummy bang macro"))
         }
-        SyntaxExtension::default(SyntaxExtensionKind::LegacyBang(Arc::new(expander)), edition)
+        SyntaxExtension::default(SyntaxExtensionKind::Bang(Arc::new(expand)), edition)
     }
 
     /// A dummy derive macro `#[derive(Foo)]`.
diff --git a/compiler/rustc_expand/src/expand.rs b/compiler/rustc_expand/src/expand.rs
index 4c0e0bbfe26..172bc3d1d9f 100644
--- a/compiler/rustc_expand/src/expand.rs
+++ b/compiler/rustc_expand/src/expand.rs
@@ -971,7 +971,7 @@ impl<'a, 'b> MacroExpander<'a, 'b> {
                             });
                         }
                     },
-                    SyntaxExtensionKind::LegacyBang(..) => {
+                    SyntaxExtensionKind::Bang(..) => {
                         let msg = "expanded a dummy glob delegation";
                         let guar = self.cx.dcx().span_delayed_bug(span, msg);
                         return ExpandResult::Ready(fragment_kind.dummy(span, guar));
diff --git a/compiler/rustc_expand/src/mbe/macro_rules.rs b/compiler/rustc_expand/src/mbe/macro_rules.rs
index 1d147a0385c..d4504ba720e 100644
--- a/compiler/rustc_expand/src/mbe/macro_rules.rs
+++ b/compiler/rustc_expand/src/mbe/macro_rules.rs
@@ -33,8 +33,8 @@ use super::diagnostics::{FailedMacro, failed_to_match_macro};
 use super::macro_parser::{NamedMatches, NamedParseResult};
 use super::{SequenceRepetition, diagnostics};
 use crate::base::{
-    AttrProcMacro, DummyResult, ExpandResult, ExtCtxt, MacResult, MacroExpanderResult,
-    SyntaxExtension, SyntaxExtensionKind, TTMacroExpander,
+    AttrProcMacro, BangProcMacro, DummyResult, ExpandResult, ExtCtxt, MacResult,
+    MacroExpanderResult, SyntaxExtension, SyntaxExtensionKind, TTMacroExpander,
 };
 use crate::errors;
 use crate::expand::{AstFragment, AstFragmentKind, ensure_complete_parse, parse_ast_fragment};
@@ -267,16 +267,16 @@ impl AttrProcMacro for MacroRulesMacroExpander {
     }
 }
 
-struct DummyExpander(ErrorGuaranteed);
+struct DummyBang(ErrorGuaranteed);
 
-impl TTMacroExpander for DummyExpander {
+impl BangProcMacro for DummyBang {
     fn expand<'cx>(
         &self,
         _: &'cx mut ExtCtxt<'_>,
-        span: Span,
+        _: Span,
         _: TokenStream,
-    ) -> ExpandResult<Box<dyn MacResult + 'cx>, ()> {
-        ExpandResult::Ready(DummyResult::any(span, self.0))
+    ) -> Result<TokenStream, ErrorGuaranteed> {
+        Err(self.0)
     }
 }
 
@@ -664,7 +664,7 @@ pub fn compile_declarative_macro(
         SyntaxExtension::new(sess, kind, span, Vec::new(), edition, ident.name, attrs, is_local)
     };
     let dummy_syn_ext =
-        |guar| (mk_syn_ext(SyntaxExtensionKind::LegacyBang(Arc::new(DummyExpander(guar)))), 0);
+        |guar| (mk_syn_ext(SyntaxExtensionKind::Bang(Arc::new(DummyBang(guar)))), 0);
 
     let macro_rules = macro_def.macro_rules;
     let exp_sep = if macro_rules { exp!(Semi) } else { exp!(Comma) };
@@ -894,12 +894,12 @@ fn check_redundant_vis_repetition(
     seq: &SequenceRepetition,
     span: &DelimSpan,
 ) {
-    let is_zero_or_one: bool = seq.kleene.op == KleeneOp::ZeroOrOne;
-    let is_vis = seq.tts.first().map_or(false, |tt| {
-        matches!(tt, mbe::TokenTree::MetaVarDecl { kind: NonterminalKind::Vis, .. })
-    });
-
-    if is_vis && is_zero_or_one {
+    if seq.kleene.op == KleeneOp::ZeroOrOne
+        && matches!(
+            seq.tts.first(),
+            Some(mbe::TokenTree::MetaVarDecl { kind: NonterminalKind::Vis, .. })
+        )
+    {
         err.note("a `vis` fragment can already be empty");
         err.multipart_suggestion(
             "remove the `$(` and `)?`",
diff --git a/compiler/rustc_feature/src/accepted.rs b/compiler/rustc_feature/src/accepted.rs
index 6af4cfb0e56..364a1202b05 100644
--- a/compiler/rustc_feature/src/accepted.rs
+++ b/compiler/rustc_feature/src/accepted.rs
@@ -205,7 +205,7 @@ declare_features! (
     (accepted, extended_key_value_attributes, "1.54.0", Some(78835)),
     /// Allows using `aapcs`, `efiapi`, `sysv64` and `win64` as calling conventions
     /// for functions with varargs.
-    (accepted, extended_varargs_abi_support, "CURRENT_RUSTC_VERSION", Some(100189)),
+    (accepted, extended_varargs_abi_support, "1.91.0", Some(100189)),
     /// Allows resolving absolute paths as paths from other crates.
     (accepted, extern_absolute_paths, "1.30.0", Some(44660)),
     /// Allows `extern crate foo as bar;`. This puts `bar` into extern prelude.
@@ -400,7 +400,7 @@ declare_features! (
     /// Allows use of `&foo[a..b]` as a slicing syntax.
     (accepted, slicing_syntax, "1.0.0", None),
     /// Allows use of `sse4a` target feature.
-    (accepted, sse4a_target_feature, "CURRENT_RUSTC_VERSION", Some(44839)),
+    (accepted, sse4a_target_feature, "1.91.0", Some(44839)),
     /// Allows elision of `'static` lifetimes in `static`s and `const`s.
     (accepted, static_in_const, "1.17.0", Some(35897)),
     /// Allows the definition recursive static items.
@@ -414,7 +414,7 @@ declare_features! (
     /// Allows the use of `#[target_feature]` on safe functions.
     (accepted, target_feature_11, "1.86.0", Some(69098)),
     /// Allows use of `tbm` target feature.
-    (accepted, tbm_target_feature, "CURRENT_RUSTC_VERSION", Some(44839)),
+    (accepted, tbm_target_feature, "1.91.0", Some(44839)),
     /// Allows `fn main()` with return types which implements `Termination` (RFC 1937).
     (accepted, termination_trait, "1.26.0", Some(43301)),
     /// Allows `#[test]` functions where the return type implements `Termination` (RFC 1937).
diff --git a/compiler/rustc_feature/src/removed.rs b/compiler/rustc_feature/src/removed.rs
index e37fc6b7bfc..32115535e99 100644
--- a/compiler/rustc_feature/src/removed.rs
+++ b/compiler/rustc_feature/src/removed.rs
@@ -192,7 +192,7 @@ declare_features! (
     (removed, no_debug, "1.43.0", Some(29721), Some("removed due to lack of demand"), 69667),
     // Allows the use of `no_sanitize` attribute.
     /// The feature was renamed to `sanitize` and the attribute to `#[sanitize(xyz = "on|off")]`
-    (removed, no_sanitize, "CURRENT_RUSTC_VERSION", Some(39699), Some(r#"renamed to sanitize(xyz = "on|off")"#), 142681),
+    (removed, no_sanitize, "1.91.0", Some(39699), Some(r#"renamed to sanitize(xyz = "on|off")"#), 142681),
     /// Note: this feature was previously recorded in a separate
     /// `STABLE_REMOVED` list because it, uniquely, was once stable but was
     /// then removed. But there was no utility storing it separately, so now
@@ -203,7 +203,7 @@ declare_features! (
     (removed, object_safe_for_dispatch, "1.83.0", Some(43561),
      Some("renamed to `dyn_compatible_for_dispatch`"), 131511),
     /// Allows using `#[omit_gdb_pretty_printer_section]`.
-    (removed, omit_gdb_pretty_printer_section, "CURRENT_RUSTC_VERSION", None, None, 144738),
+    (removed, omit_gdb_pretty_printer_section, "1.91.0", None, None, 144738),
     /// Allows using `#[on_unimplemented(..)]` on traits.
     /// (Moved to `rustc_attrs`.)
     (removed, on_unimplemented, "1.40.0", None, None, 65794),
diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs
index 93e5588146e..6ef0df72365 100644
--- a/compiler/rustc_feature/src/unstable.rs
+++ b/compiler/rustc_feature/src/unstable.rs
@@ -327,7 +327,7 @@ declare_features! (
     (unstable, m68k_target_feature, "1.85.0", Some(134328)),
     (unstable, mips_target_feature, "1.27.0", Some(44839)),
     (unstable, movrs_target_feature, "1.88.0", Some(137976)),
-    (unstable, nvptx_target_feature, "CURRENT_RUSTC_VERSION", Some(44839)),
+    (unstable, nvptx_target_feature, "1.91.0", Some(44839)),
     (unstable, powerpc_target_feature, "1.27.0", Some(44839)),
     (unstable, prfchw_target_feature, "1.78.0", Some(44839)),
     (unstable, riscv_target_feature, "1.45.0", Some(44839)),
@@ -471,7 +471,7 @@ declare_features! (
     /// Allows deref patterns.
     (incomplete, deref_patterns, "1.79.0", Some(87121)),
     /// Allows deriving the From trait on single-field structs.
-    (unstable, derive_from, "CURRENT_RUSTC_VERSION", Some(144889)),
+    (unstable, derive_from, "1.91.0", Some(144889)),
     /// Tells rustdoc to automatically generate `#[doc(cfg(...))]`.
     (unstable, doc_auto_cfg, "1.58.0", Some(43781)),
     /// Allows `#[doc(cfg(...))]`.
@@ -481,7 +481,7 @@ declare_features! (
     /// Allows `#[doc(masked)]`.
     (unstable, doc_masked, "1.21.0", Some(44027)),
     /// Allows features to allow target_feature to better interact with traits.
-    (incomplete, effective_target_features, "CURRENT_RUSTC_VERSION", Some(143352)),
+    (incomplete, effective_target_features, "1.91.0", Some(143352)),
     /// Allows the .use postfix syntax `x.use` and use closures `use |x| { ... }`
     (incomplete, ergonomic_clones, "1.87.0", Some(132290)),
     /// Allows exhaustive pattern matching on types that contain uninhabited types.
@@ -554,9 +554,9 @@ declare_features! (
     /// Allows fused `loop`/`match` for direct intraprocedural jumps.
     (incomplete, loop_match, "1.90.0", Some(132306)),
     /// Allow `macro_rules!` attribute rules
-    (unstable, macro_attr, "CURRENT_RUSTC_VERSION", Some(83527)),
+    (unstable, macro_attr, "1.91.0", Some(83527)),
     /// Allow `macro_rules!` derive rules
-    (unstable, macro_derive, "CURRENT_RUSTC_VERSION", Some(143549)),
+    (unstable, macro_derive, "1.91.0", Some(143549)),
     /// Give access to additional metadata about declarative macro meta-variables.
     (unstable, macro_metavar_expr, "1.61.0", Some(83527)),
     /// Provides a way to concatenate identifiers using metavariable expressions.
@@ -613,7 +613,7 @@ declare_features! (
     (unstable, proc_macro_hygiene, "1.30.0", Some(54727)),
     /// Allows the use of raw-dylibs on ELF platforms
     (incomplete, raw_dylib_elf, "1.87.0", Some(135694)),
-    (unstable, reborrow, "CURRENT_RUSTC_VERSION", Some(145612)),
+    (unstable, reborrow, "1.91.0", Some(145612)),
     /// Makes `&` and `&mut` patterns eat only one layer of references in Rust 2024.
     (incomplete, ref_pat_eat_one_layer_2024, "1.79.0", Some(123076)),
     /// Makes `&` and `&mut` patterns eat only one layer of references in Rust 2024—structural variant
@@ -627,13 +627,13 @@ declare_features! (
     /// Allows `extern "rust-cold"`.
     (unstable, rust_cold_cc, "1.63.0", Some(97544)),
     /// Allows the use of the `sanitize` attribute.
-    (unstable, sanitize, "CURRENT_RUSTC_VERSION", Some(39699)),
+    (unstable, sanitize, "1.91.0", Some(39699)),
     /// Allows the use of SIMD types in functions declared in `extern` blocks.
     (unstable, simd_ffi, "1.0.0", Some(27731)),
     /// Allows specialization of implementations (RFC 1210).
     (incomplete, specialization, "1.7.0", Some(31844)),
     /// Allows using `#[rustc_align_static(...)]` on static items.
-    (unstable, static_align, "CURRENT_RUSTC_VERSION", Some(146177)),
+    (unstable, static_align, "1.91.0", Some(146177)),
     /// Allows attributes on expressions and non-item statements.
     (unstable, stmt_expr_attributes, "1.6.0", Some(15701)),
     /// Allows lints part of the strict provenance effort.
@@ -645,7 +645,7 @@ declare_features! (
     /// Allows subtrait items to shadow supertrait items.
     (unstable, supertrait_item_shadowing, "1.86.0", Some(89151)),
     /// Allows the use of target_feature when a function is marked inline(always).
-    (unstable, target_feature_inline_always, "CURRENT_RUSTC_VERSION", Some(145574)),
+    (unstable, target_feature_inline_always, "1.91.0", Some(145574)),
     /// Allows using `#[thread_local]` on `static` items.
     (unstable, thread_local, "1.0.0", Some(29594)),
     /// Allows defining `trait X = A + B;` alias items.
diff --git a/compiler/rustc_hir/src/attrs/data_structures.rs b/compiler/rustc_hir/src/attrs/data_structures.rs
index 5481c9debc1..ddcbaeaad88 100644
--- a/compiler/rustc_hir/src/attrs/data_structures.rs
+++ b/compiler/rustc_hir/src/attrs/data_structures.rs
@@ -363,6 +363,20 @@ pub struct LinkEntry {
     pub import_name_type: Option<(PeImportNameType, Span)>,
 }
 
+#[derive(HashStable_Generic, PrintAttribute)]
+#[derive(Copy, PartialEq, PartialOrd, Clone, Ord, Eq, Hash, Debug, Encodable, Decodable)]
+pub enum DebuggerVisualizerType {
+    Natvis,
+    GdbPrettyPrinter,
+}
+
+#[derive(Debug, Encodable, Decodable, Clone, HashStable_Generic, PrintAttribute)]
+pub struct DebugVisualizer {
+    pub span: Span,
+    pub visualizer_type: DebuggerVisualizerType,
+    pub path: Symbol,
+}
+
 /// Represents parsed *built-in* inert attributes.
 ///
 /// ## Overview
@@ -485,7 +499,10 @@ pub enum AttributeKind {
     /// Represents `#[custom_mir]`.
     CustomMir(Option<(MirDialect, Span)>, Option<(MirPhase, Span)>, Span),
 
-    ///Represents `#[rustc_deny_explicit_impl]`.
+    /// Represents `#[debugger_visualizer]`.
+    DebuggerVisualizer(ThinVec<DebugVisualizer>),
+
+    /// Represents `#[rustc_deny_explicit_impl]`.
     DenyExplicitImpl(Span),
 
     /// Represents [`#[deprecated]`](https://doc.rust-lang.org/stable/reference/attributes/diagnostics.html#the-deprecated-attribute).
diff --git a/compiler/rustc_hir/src/attrs/encode_cross_crate.rs b/compiler/rustc_hir/src/attrs/encode_cross_crate.rs
index e0a37f50f45..1611b865c77 100644
--- a/compiler/rustc_hir/src/attrs/encode_cross_crate.rs
+++ b/compiler/rustc_hir/src/attrs/encode_cross_crate.rs
@@ -37,6 +37,7 @@ impl AttributeKind {
             Coverage(..) => No,
             CrateName { .. } => No,
             CustomMir(_, _, _) => Yes,
+            DebuggerVisualizer(..) => No,
             DenyExplicitImpl(..) => No,
             Deprecation { .. } => Yes,
             DoNotImplementViaObject(..) => No,
diff --git a/compiler/rustc_hir_typeck/src/expr.rs b/compiler/rustc_hir_typeck/src/expr.rs
index 7adbee7ff28..d1ce0afddf9 100644
--- a/compiler/rustc_hir_typeck/src/expr.rs
+++ b/compiler/rustc_hir_typeck/src/expr.rs
@@ -1633,8 +1633,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         expected: Expectation<'tcx>,
     ) -> Ty<'tcx> {
         let rcvr_t = self.check_expr(rcvr);
-        // no need to check for bot/err -- callee does that
-        let rcvr_t = self.structurally_resolve_type(rcvr.span, rcvr_t);
+        let rcvr_t = self.try_structurally_resolve_type(rcvr.span, rcvr_t);
 
         match self.lookup_method(rcvr_t, segment, segment.ident.span, expr, rcvr, args) {
             Ok(method) => {
diff --git a/compiler/rustc_hir_typeck/src/method/confirm.rs b/compiler/rustc_hir_typeck/src/method/confirm.rs
index a23910a2006..b23e7ae8e77 100644
--- a/compiler/rustc_hir_typeck/src/method/confirm.rs
+++ b/compiler/rustc_hir_typeck/src/method/confirm.rs
@@ -172,7 +172,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
         // Commit the autoderefs by calling `autoderef` again, but this
         // time writing the results into the various typeck results.
         let mut autoderef = self.autoderef(self.call_expr.span, unadjusted_self_ty);
-        let Some((ty, n)) = autoderef.nth(pick.autoderefs) else {
+        let Some((mut target, n)) = autoderef.nth(pick.autoderefs) else {
             return Ty::new_error_with_message(
                 self.tcx,
                 DUMMY_SP,
@@ -182,8 +182,6 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
         assert_eq!(n, pick.autoderefs);
 
         let mut adjustments = self.adjust_steps(&autoderef);
-        let mut target = self.structurally_resolve_type(autoderef.span(), ty);
-
         match pick.autoref_or_ptr_adjustment {
             Some(probe::AutorefOrPtrAdjustment::Autoref { mutbl, unsize }) => {
                 let region = self.next_region_var(RegionVariableOrigin::Autoref(self.span));
diff --git a/compiler/rustc_hir_typeck/src/method/probe.rs b/compiler/rustc_hir_typeck/src/method/probe.rs
index 4185f7f6996..12f80a197b1 100644
--- a/compiler/rustc_hir_typeck/src/method/probe.rs
+++ b/compiler/rustc_hir_typeck/src/method/probe.rs
@@ -13,7 +13,7 @@ use rustc_hir::def::DefKind;
 use rustc_hir_analysis::autoderef::{self, Autoderef};
 use rustc_infer::infer::canonical::{Canonical, OriginalQueryValues, QueryResponse};
 use rustc_infer::infer::{BoundRegionConversionTime, DefineOpaqueTypes, InferOk, TyCtxtInferExt};
-use rustc_infer::traits::ObligationCauseCode;
+use rustc_infer::traits::{ObligationCauseCode, PredicateObligation, query};
 use rustc_middle::middle::stability;
 use rustc_middle::ty::elaborate::supertrait_def_ids;
 use rustc_middle::ty::fast_reject::{DeepRejectCtxt, TreatParams, simplify_type};
@@ -30,7 +30,8 @@ use rustc_span::edit_distance::{
 use rustc_span::{DUMMY_SP, Ident, Span, Symbol, sym};
 use rustc_trait_selection::error_reporting::infer::need_type_info::TypeAnnotationNeeded;
 use rustc_trait_selection::infer::InferCtxtExt as _;
-use rustc_trait_selection::traits::query::CanonicalTyGoal;
+use rustc_trait_selection::solve::Goal;
+use rustc_trait_selection::traits::query::CanonicalMethodAutoderefStepsGoal;
 use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt;
 use rustc_trait_selection::traits::query::method_autoderef::{
     CandidateStep, MethodAutoderefBadTy, MethodAutoderefStepsResult,
@@ -389,10 +390,16 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         OP: FnOnce(ProbeContext<'_, 'tcx>) -> Result<R, MethodError<'tcx>>,
     {
         let mut orig_values = OriginalQueryValues::default();
-        let query_input = self.canonicalize_query(
-            ParamEnvAnd { param_env: self.param_env, value: self_ty },
-            &mut orig_values,
-        );
+        let predefined_opaques_in_body = if self.next_trait_solver() {
+            self.tcx.mk_predefined_opaques_in_body_from_iter(
+                self.inner.borrow_mut().opaque_types().iter_opaque_types().map(|(k, v)| (k, v.ty)),
+            )
+        } else {
+            ty::List::empty()
+        };
+        let value = query::MethodAutoderefSteps { predefined_opaques_in_body, self_ty };
+        let query_input = self
+            .canonicalize_query(ParamEnvAnd { param_env: self.param_env, value }, &mut orig_values);
 
         let steps = match mode {
             Mode::MethodCall => self.tcx.method_autoderef_steps(query_input),
@@ -403,13 +410,15 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 // special handling for this "trivial case" is a good idea.
 
                 let infcx = &self.infcx;
-                let (ParamEnvAnd { param_env: _, value: self_ty }, var_values) =
+                let (ParamEnvAnd { param_env: _, value }, var_values) =
                     infcx.instantiate_canonical(span, &query_input.canonical);
+                let query::MethodAutoderefSteps { predefined_opaques_in_body: _, self_ty } = value;
                 debug!(?self_ty, ?query_input, "probe_op: Mode::Path");
                 MethodAutoderefStepsResult {
                     steps: infcx.tcx.arena.alloc_from_iter([CandidateStep {
                         self_ty: self
                             .make_query_response_ignoring_pending_obligations(var_values, self_ty),
+                        self_ty_is_opaque: false,
                         autoderefs: 0,
                         from_unsafe_deref: false,
                         unsize: false,
@@ -479,6 +488,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     ty::Infer(ty::TyVar(_)) => {
                         let raw_ptr_call = bad_ty.reached_raw_pointer
                             && !self.tcx.features().arbitrary_self_types();
+                        // FIXME: Ideally we'd use the span of the self-expr here,
+                        // not of the method path.
                         let mut err = self.err_ctxt().emit_inference_failure_err(
                             self.body_id,
                             span,
@@ -553,12 +564,44 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
 pub(crate) fn method_autoderef_steps<'tcx>(
     tcx: TyCtxt<'tcx>,
-    goal: CanonicalTyGoal<'tcx>,
+    goal: CanonicalMethodAutoderefStepsGoal<'tcx>,
 ) -> MethodAutoderefStepsResult<'tcx> {
     debug!("method_autoderef_steps({:?})", goal);
 
     let (ref infcx, goal, inference_vars) = tcx.infer_ctxt().build_with_canonical(DUMMY_SP, &goal);
-    let ParamEnvAnd { param_env, value: self_ty } = goal;
+    let ParamEnvAnd {
+        param_env,
+        value: query::MethodAutoderefSteps { predefined_opaques_in_body, self_ty },
+    } = goal;
+    for (key, ty) in predefined_opaques_in_body {
+        let prev =
+            infcx.register_hidden_type_in_storage(key, ty::OpaqueHiddenType { span: DUMMY_SP, ty });
+        // It may be possible that two entries in the opaque type storage end up
+        // with the same key after resolving contained inference variables.
+        //
+        // We could put them in the duplicate list but don't have to. The opaques we
+        // encounter here are already tracked in the caller, so there's no need to
+        // also store them here. We'd take them out when computing the query response
+        // and then discard them, as they're already present in the input.
+        //
+        // Ideally we'd drop duplicate opaque type definitions when computing
+        // the canonical input. This is more annoying to implement and may cause a
+        // perf regression, so we do it inside of the query for now.
+        if let Some(prev) = prev {
+            debug!(?key, ?ty, ?prev, "ignore duplicate in `opaque_types_storage`");
+        }
+    }
+
+    // We accept not-yet-defined opaque types in the autoderef
+    // chain to support recursive calls. We do error if the final
+    // infer var is not an opaque.
+    let self_ty_is_opaque = |ty: Ty<'_>| {
+        if let &ty::Infer(ty::TyVar(vid)) = ty.kind() {
+            infcx.has_opaques_with_sub_unified_hidden_type(vid)
+        } else {
+            false
+        }
+    };
 
     // If arbitrary self types is not enabled, we follow the chain of
     // `Deref<Target=T>`. If arbitrary self types is enabled, we instead
@@ -593,6 +636,7 @@ pub(crate) fn method_autoderef_steps<'tcx>(
                 let step = CandidateStep {
                     self_ty: infcx
                         .make_query_response_ignoring_pending_obligations(inference_vars, ty),
+                    self_ty_is_opaque: self_ty_is_opaque(ty),
                     autoderefs: d,
                     from_unsafe_deref: reached_raw_pointer,
                     unsize: false,
@@ -613,6 +657,7 @@ pub(crate) fn method_autoderef_steps<'tcx>(
                 let step = CandidateStep {
                     self_ty: infcx
                         .make_query_response_ignoring_pending_obligations(inference_vars, ty),
+                    self_ty_is_opaque: self_ty_is_opaque(ty),
                     autoderefs: d,
                     from_unsafe_deref: reached_raw_pointer,
                     unsize: false,
@@ -629,7 +674,11 @@ pub(crate) fn method_autoderef_steps<'tcx>(
     };
     let final_ty = autoderef_via_deref.final_ty();
     let opt_bad_ty = match final_ty.kind() {
-        ty::Infer(ty::TyVar(_)) | ty::Error(_) => Some(MethodAutoderefBadTy {
+        ty::Infer(ty::TyVar(_)) if !self_ty_is_opaque(final_ty) => Some(MethodAutoderefBadTy {
+            reached_raw_pointer,
+            ty: infcx.make_query_response_ignoring_pending_obligations(inference_vars, final_ty),
+        }),
+        ty::Error(_) => Some(MethodAutoderefBadTy {
             reached_raw_pointer,
             ty: infcx.make_query_response_ignoring_pending_obligations(inference_vars, final_ty),
         }),
@@ -640,6 +689,7 @@ pub(crate) fn method_autoderef_steps<'tcx>(
                     inference_vars,
                     Ty::new_slice(infcx.tcx, *elem_ty),
                 ),
+                self_ty_is_opaque: false,
                 autoderefs,
                 // this could be from an unsafe deref if we had
                 // a *mut/const [T; N]
@@ -655,7 +705,8 @@ pub(crate) fn method_autoderef_steps<'tcx>(
     };
 
     debug!("method_autoderef_steps: steps={:?} opt_bad_ty={:?}", steps, opt_bad_ty);
-
+    // Need to empty the opaque types storage before it gets dropped.
+    let _ = infcx.take_opaque_types();
     MethodAutoderefStepsResult {
         steps: tcx.arena.alloc_from_iter(steps),
         opt_bad_ty: opt_bad_ty.map(|ty| &*tcx.arena.alloc(ty)),
@@ -1203,7 +1254,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                 !step.self_ty.value.references_error() && !step.from_unsafe_deref
             })
             .find_map(|step| {
-                let InferOk { value: self_ty, obligations: _ } = self
+                let InferOk { value: self_ty, obligations: instantiate_self_ty_obligations } = self
                     .fcx
                     .probe_instantiate_query_response(
                         self.span,
@@ -1214,7 +1265,12 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                         span_bug!(self.span, "{:?} was applicable but now isn't?", step.self_ty)
                     });
 
-                let by_value_pick = self.pick_by_value_method(step, self_ty, pick_diag_hints);
+                let by_value_pick = self.pick_by_value_method(
+                    step,
+                    self_ty,
+                    &instantiate_self_ty_obligations,
+                    pick_diag_hints,
+                );
 
                 // Check for shadowing of a by-reference method by a by-value method (see comments on check_for_shadowing)
                 if let Some(by_value_pick) = by_value_pick {
@@ -1225,6 +1281,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                                     by_value_pick,
                                     step,
                                     self_ty,
+                                    &instantiate_self_ty_obligations,
                                     mutbl,
                                     track_unstable_candidates,
                                 ) {
@@ -1239,6 +1296,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                 let autoref_pick = self.pick_autorefd_method(
                     step,
                     self_ty,
+                    &instantiate_self_ty_obligations,
                     hir::Mutability::Not,
                     pick_diag_hints,
                     None,
@@ -1252,6 +1310,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                                 autoref_pick,
                                 step,
                                 self_ty,
+                                &instantiate_self_ty_obligations,
                                 hir::Mutability::Mut,
                                 track_unstable_candidates,
                             ) {
@@ -1288,12 +1347,27 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                 self.pick_autorefd_method(
                     step,
                     self_ty,
+                    &instantiate_self_ty_obligations,
                     hir::Mutability::Mut,
                     pick_diag_hints,
                     None,
                 )
-                .or_else(|| self.pick_const_ptr_method(step, self_ty, pick_diag_hints))
-                .or_else(|| self.pick_reborrow_pin_method(step, self_ty, pick_diag_hints))
+                .or_else(|| {
+                    self.pick_const_ptr_method(
+                        step,
+                        self_ty,
+                        &instantiate_self_ty_obligations,
+                        pick_diag_hints,
+                    )
+                })
+                .or_else(|| {
+                    self.pick_reborrow_pin_method(
+                        step,
+                        self_ty,
+                        &instantiate_self_ty_obligations,
+                        pick_diag_hints,
+                    )
+                })
             })
     }
 
@@ -1317,6 +1391,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         possible_shadower: &Pick<'tcx>,
         step: &CandidateStep<'tcx>,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         mutbl: hir::Mutability,
         track_unstable_candidates: bool,
     ) -> Result<(), MethodError<'tcx>> {
@@ -1381,6 +1456,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         let potentially_shadowed_pick = self.pick_autorefd_method(
             step,
             self_ty,
+            instantiate_self_ty_obligations,
             mutbl,
             &mut pick_diag_hints,
             Some(&pick_constraints),
@@ -1407,13 +1483,14 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         &self,
         step: &CandidateStep<'tcx>,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         pick_diag_hints: &mut PickDiagHints<'_, 'tcx>,
     ) -> Option<PickResult<'tcx>> {
         if step.unsize {
             return None;
         }
 
-        self.pick_method(self_ty, pick_diag_hints, None).map(|r| {
+        self.pick_method(self_ty, instantiate_self_ty_obligations, pick_diag_hints, None).map(|r| {
             r.map(|mut pick| {
                 pick.autoderefs = step.autoderefs;
 
@@ -1450,6 +1527,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         &self,
         step: &CandidateStep<'tcx>,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         mutbl: hir::Mutability,
         pick_diag_hints: &mut PickDiagHints<'_, 'tcx>,
         pick_constraints: Option<&PickConstraintsForShadowed>,
@@ -1466,7 +1544,13 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         let region = tcx.lifetimes.re_erased;
 
         let autoref_ty = Ty::new_ref(tcx, region, self_ty, mutbl);
-        self.pick_method(autoref_ty, pick_diag_hints, pick_constraints).map(|r| {
+        self.pick_method(
+            autoref_ty,
+            instantiate_self_ty_obligations,
+            pick_diag_hints,
+            pick_constraints,
+        )
+        .map(|r| {
             r.map(|mut pick| {
                 pick.autoderefs = step.autoderefs;
                 pick.autoref_or_ptr_adjustment =
@@ -1482,6 +1566,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         &self,
         step: &CandidateStep<'tcx>,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         pick_diag_hints: &mut PickDiagHints<'_, 'tcx>,
     ) -> Option<PickResult<'tcx>> {
         if !self.tcx.features().pin_ergonomics() {
@@ -1503,14 +1588,16 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
 
         let region = self.tcx.lifetimes.re_erased;
         let autopin_ty = Ty::new_pinned_ref(self.tcx, region, inner_ty, hir::Mutability::Not);
-        self.pick_method(autopin_ty, pick_diag_hints, None).map(|r| {
-            r.map(|mut pick| {
-                pick.autoderefs = step.autoderefs;
-                pick.autoref_or_ptr_adjustment =
-                    Some(AutorefOrPtrAdjustment::ReborrowPin(hir::Mutability::Not));
-                pick
-            })
-        })
+        self.pick_method(autopin_ty, instantiate_self_ty_obligations, pick_diag_hints, None).map(
+            |r| {
+                r.map(|mut pick| {
+                    pick.autoderefs = step.autoderefs;
+                    pick.autoref_or_ptr_adjustment =
+                        Some(AutorefOrPtrAdjustment::ReborrowPin(hir::Mutability::Not));
+                    pick
+                })
+            },
+        )
     }
 
     /// If `self_ty` is `*mut T` then this picks `*const T` methods. The reason why we have a
@@ -1520,6 +1607,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         &self,
         step: &CandidateStep<'tcx>,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         pick_diag_hints: &mut PickDiagHints<'_, 'tcx>,
     ) -> Option<PickResult<'tcx>> {
         // Don't convert an unsized reference to ptr
@@ -1532,18 +1620,21 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         };
 
         let const_ptr_ty = Ty::new_imm_ptr(self.tcx, ty);
-        self.pick_method(const_ptr_ty, pick_diag_hints, None).map(|r| {
-            r.map(|mut pick| {
-                pick.autoderefs = step.autoderefs;
-                pick.autoref_or_ptr_adjustment = Some(AutorefOrPtrAdjustment::ToConstPtr);
-                pick
-            })
-        })
+        self.pick_method(const_ptr_ty, instantiate_self_ty_obligations, pick_diag_hints, None).map(
+            |r| {
+                r.map(|mut pick| {
+                    pick.autoderefs = step.autoderefs;
+                    pick.autoref_or_ptr_adjustment = Some(AutorefOrPtrAdjustment::ToConstPtr);
+                    pick
+                })
+            },
+        )
     }
 
     fn pick_method(
         &self,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         pick_diag_hints: &mut PickDiagHints<'_, 'tcx>,
         pick_constraints: Option<&PickConstraintsForShadowed>,
     ) -> Option<PickResult<'tcx>> {
@@ -1553,8 +1644,13 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
             [("inherent", &self.inherent_candidates), ("extension", &self.extension_candidates)]
         {
             debug!("searching {} candidates", kind);
-            let res =
-                self.consider_candidates(self_ty, candidates, pick_diag_hints, pick_constraints);
+            let res = self.consider_candidates(
+                self_ty,
+                instantiate_self_ty_obligations,
+                candidates,
+                pick_diag_hints,
+                pick_constraints,
+            );
             if let Some(pick) = res {
                 return Some(pick);
             }
@@ -1563,6 +1659,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         if self.private_candidate.get().is_none() {
             if let Some(Ok(pick)) = self.consider_candidates(
                 self_ty,
+                instantiate_self_ty_obligations,
                 &self.private_candidates,
                 &mut PickDiagHints {
                     unstable_candidates: None,
@@ -1579,6 +1676,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
     fn consider_candidates(
         &self,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         candidates: &[Candidate<'tcx>],
         pick_diag_hints: &mut PickDiagHints<'_, 'tcx>,
         pick_constraints: Option<&PickConstraintsForShadowed>,
@@ -1595,6 +1693,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                     probe,
                     self.consider_probe(
                         self_ty,
+                        instantiate_self_ty_obligations,
                         probe,
                         &mut pick_diag_hints.unsatisfied_predicates,
                     ),
@@ -1779,10 +1878,11 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         }
     }
 
-    #[instrument(level = "trace", skip(self, possibly_unsatisfied_predicates), ret)]
+    #[instrument(level = "debug", skip(self, possibly_unsatisfied_predicates), ret)]
     fn consider_probe(
         &self,
         self_ty: Ty<'tcx>,
+        instantiate_self_ty_obligations: &[PredicateObligation<'tcx>],
         probe: &Candidate<'tcx>,
         possibly_unsatisfied_predicates: &mut Vec<(
             ty::Predicate<'tcx>,
@@ -1790,8 +1890,6 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
             Option<ObligationCause<'tcx>>,
         )>,
     ) -> ProbeResult {
-        debug!("consider_probe: self_ty={:?} probe={:?}", self_ty, probe);
-
         self.probe(|snapshot| {
             let outer_universe = self.universe();
 
@@ -1799,6 +1897,21 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
             let cause = &self.misc(self.span);
             let ocx = ObligationCtxt::new_with_diagnostics(self);
 
+            // Subtle: we're not *really* instantiating the current self type while
+            // probing, but instead fully recompute the autoderef steps once we've got
+            // a final `Pick`. We can't nicely handle these obligations outside of a probe.
+            //
+            // We simply handle them for each candidate here for now. That's kinda scuffed
+            // and ideally we just put them into the `FnCtxt` right away. We need to consider
+            // them to deal with defining uses in `method_autoderef_steps`.
+            if self.next_trait_solver() {
+                ocx.register_obligations(instantiate_self_ty_obligations.iter().cloned());
+                let errors = ocx.select_where_possible();
+                if !errors.is_empty() {
+                    unreachable!("unexpected autoderef error {errors:?}");
+                }
+            }
+
             let mut trait_predicate = None;
             let (mut xform_self_ty, mut xform_ret_ty);
 
@@ -2041,6 +2154,12 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                 }
             }
 
+            if self.infcx.next_trait_solver() {
+                if self.should_reject_candidate_due_to_opaque_treated_as_rigid(trait_predicate) {
+                    result = ProbeResult::NoMatch;
+                }
+            }
+
             // Previously, method probe used `evaluate_predicate` to determine if a predicate
             // was impossible to satisfy. This did a leak check, so we must also do a leak
             // check here to prevent backwards-incompatible ambiguity being introduced. See
@@ -2054,6 +2173,80 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         })
     }
 
+    /// Trait candidates for not-yet-defined opaque types are a somewhat hacky.
+    ///
+    /// We want to only accept trait methods if they were hold even if the
+    /// opaque types were rigid. To handle this, we both check that for trait
+    /// candidates the goal were to hold even when treating opaques as rigid,
+    /// see [OpaqueTypesJank](rustc_trait_selection::solve::OpaqueTypesJank).
+    ///
+    /// We also check that all opaque types encountered as self types in the
+    /// autoderef chain don't get constrained when applying the candidate.
+    /// Importantly, this also handles calling methods taking `&self` on
+    /// `impl Trait` to reject the "by-self" candidate.
+    ///
+    /// This needs to happen at the end of `consider_probe` as we need to take
+    /// all the constraints from that into account.
+    #[instrument(level = "debug", skip(self), ret)]
+    fn should_reject_candidate_due_to_opaque_treated_as_rigid(
+        &self,
+        trait_predicate: Option<ty::Predicate<'tcx>>,
+    ) -> bool {
+        // This function is what hacky and doesn't perfectly do what we want it to.
+        // It's not soundness critical and we should be able to freely improve this
+        // in the future.
+        //
+        // Some concrete edge cases include the fact that `goal_may_hold_opaque_types_jank`
+        // also fails if there are any constraints opaques which are never used as a self
+        // type. We also allow where-bounds which are currently ambiguous but end up
+        // constraining an opaque later on.
+
+        // Check whether the trait candidate would not be applicable if the
+        // opaque type were rigid.
+        if let Some(predicate) = trait_predicate {
+            let goal = Goal { param_env: self.param_env, predicate };
+            if !self.infcx.goal_may_hold_opaque_types_jank(goal) {
+                return true;
+            }
+        }
+
+        // Check whether any opaque types in the autoderef chain have been
+        // constrained.
+        for step in self.steps {
+            if step.self_ty_is_opaque {
+                debug!(?step.autoderefs, ?step.self_ty, "self_type_is_opaque");
+                let constrained_opaque = self.probe(|_| {
+                    // If we fail to instantiate the self type of this
+                    // step, this part of the deref-chain is no longer
+                    // reachable. In this case we don't care about opaque
+                    // types there.
+                    let Ok(ok) = self.fcx.probe_instantiate_query_response(
+                        self.span,
+                        self.orig_steps_var_values,
+                        &step.self_ty,
+                    ) else {
+                        debug!("failed to instantiate self_ty");
+                        return false;
+                    };
+                    let ocx = ObligationCtxt::new(self);
+                    let self_ty = ocx.register_infer_ok_obligations(ok);
+                    if !ocx.select_where_possible().is_empty() {
+                        debug!("failed to prove instantiate self_ty obligations");
+                        return false;
+                    }
+
+                    !self.resolve_vars_if_possible(self_ty).is_ty_var()
+                });
+                if constrained_opaque {
+                    debug!("opaque type has been constrained");
+                    return true;
+                }
+            }
+        }
+
+        false
+    }
+
     /// Sometimes we get in a situation where we have multiple probes that are all impls of the
     /// same trait, but we don't know which impl to use. In this case, since in all cases the
     /// external interface of the method can be determined from the trait, it's ok not to decide.
diff --git a/compiler/rustc_index/src/idx.rs b/compiler/rustc_index/src/idx.rs
index 9cd7134659c..2fb2008f9a3 100644
--- a/compiler/rustc_index/src/idx.rs
+++ b/compiler/rustc_index/src/idx.rs
@@ -130,12 +130,6 @@ impl<I: Idx, T> IntoSliceIdx<I, [T]> for core::range::RangeFrom<I> {
 impl<I: Idx, T> IntoSliceIdx<I, [T]> for core::range::RangeInclusive<I> {
     type Output = core::range::RangeInclusive<usize>;
     #[inline]
-    #[cfg(bootstrap)]
-    fn into_slice_idx(self) -> Self::Output {
-        core::range::RangeInclusive { start: self.start.index(), end: self.end.index() }
-    }
-    #[inline]
-    #[cfg(not(bootstrap))]
     fn into_slice_idx(self) -> Self::Output {
         core::range::RangeInclusive { start: self.start.index(), last: self.last.index() }
     }
diff --git a/compiler/rustc_infer/src/infer/canonical/query_response.rs b/compiler/rustc_infer/src/infer/canonical/query_response.rs
index 5d1b4be9e57..b3959113d5d 100644
--- a/compiler/rustc_infer/src/infer/canonical/query_response.rs
+++ b/compiler/rustc_infer/src/infer/canonical/query_response.rs
@@ -85,11 +85,29 @@ impl<'tcx> InferCtxt<'tcx> {
     where
         T: Debug + TypeFoldable<TyCtxt<'tcx>>,
     {
+        // While we ignore region constraints and pending obligations,
+        // we do return constrained opaque types to avoid unconstrained
+        // inference variables in the response. This is important as we want
+        // to check that opaques in deref steps stay unconstrained.
+        //
+        // This doesn't handle the more general case for non-opaques as
+        // ambiguous `Projection` obligations have same the issue.
+        let opaque_types = if self.next_trait_solver() {
+            self.inner
+                .borrow_mut()
+                .opaque_type_storage
+                .iter_opaque_types()
+                .map(|(k, v)| (k, v.ty))
+                .collect()
+        } else {
+            vec![]
+        };
+
         self.canonicalize_response(QueryResponse {
             var_values: inference_vars,
             region_constraints: QueryRegionConstraints::default(),
             certainty: Certainty::Proven, // Ambiguities are OK!
-            opaque_types: vec![],
+            opaque_types,
             value: answer,
         })
     }
diff --git a/compiler/rustc_lint_defs/src/builtin.rs b/compiler/rustc_lint_defs/src/builtin.rs
index 3d0974d5d28..939f3d088b1 100644
--- a/compiler/rustc_lint_defs/src/builtin.rs
+++ b/compiler/rustc_lint_defs/src/builtin.rs
@@ -2309,10 +2309,10 @@ declare_lint! {
     /// ### Example
     ///
     /// ```rust
-    /// #![cfg_attr(not(bootstrap), feature(sanitize))]
+    /// #![feature(sanitize)]
     ///
     /// #[inline(always)]
-    /// #[cfg_attr(not(bootstrap), sanitize(address = "off"))]
+    /// #[sanitize(address = "off")]
     /// fn x() {}
     ///
     /// fn main() {
@@ -4837,16 +4837,13 @@ declare_lint! {
     ///
     /// ### Example
     ///
-    #[cfg_attr(not(bootstrap), doc = "```rust,compile_fail")]
-    #[cfg_attr(bootstrap, doc = "```rust")]
+    /// ```rust,compile_fail
     /// #![doc = in_root!()]
     ///
     /// macro_rules! in_root { () => { "" } }
     ///
     /// fn main() {}
-    #[cfg_attr(not(bootstrap), doc = "```")]
-    #[cfg_attr(bootstrap, doc = "```")]
-    // ^ Needed to avoid tidy warning about odd number of backticks
+    /// ```
     ///
     /// {{produces}}
     ///
diff --git a/compiler/rustc_macros/src/query.rs b/compiler/rustc_macros/src/query.rs
index 5821ffa3a30..5d32950875a 100644
--- a/compiler/rustc_macros/src/query.rs
+++ b/compiler/rustc_macros/src/query.rs
@@ -5,7 +5,7 @@ use syn::punctuated::Punctuated;
 use syn::spanned::Spanned;
 use syn::{
     AttrStyle, Attribute, Block, Error, Expr, Ident, Pat, ReturnType, Token, Type, braced,
-    parenthesized, parse_macro_input, parse_quote, token,
+    parenthesized, parse_macro_input, token,
 };
 
 mod kw {
diff --git a/compiler/rustc_middle/src/arena.rs b/compiler/rustc_middle/src/arena.rs
index 52fbe19c9f2..fa6a2db38ef 100644
--- a/compiler/rustc_middle/src/arena.rs
+++ b/compiler/rustc_middle/src/arena.rs
@@ -109,7 +109,6 @@ macro_rules! arena_types {
                     rustc_middle::ty::EarlyBinder<'tcx, rustc_middle::ty::Ty<'tcx>>
                 >,
             [] external_constraints: rustc_middle::traits::solve::ExternalConstraintsData<rustc_middle::ty::TyCtxt<'tcx>>,
-            [] predefined_opaques_in_body: rustc_middle::traits::solve::PredefinedOpaquesData<rustc_middle::ty::TyCtxt<'tcx>>,
             [decode] doc_link_resolutions: rustc_hir::def::DocLinkResMap,
             [] stripped_cfg_items: rustc_hir::attrs::StrippedCfgItem,
             [] mod_child: rustc_middle::metadata::ModChild,
diff --git a/compiler/rustc_middle/src/lib.rs b/compiler/rustc_middle/src/lib.rs
index 5023b2740ef..754a258eef9 100644
--- a/compiler/rustc_middle/src/lib.rs
+++ b/compiler/rustc_middle/src/lib.rs
@@ -29,7 +29,6 @@
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::direct_use_of_rustc_type_ir)]
 #![allow(rustc::untranslatable_diagnostic)]
-#![cfg_attr(bootstrap, feature(round_char_boundary))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(allocator_api)]
diff --git a/compiler/rustc_middle/src/middle/debugger_visualizer.rs b/compiler/rustc_middle/src/middle/debugger_visualizer.rs
index 5a811321f58..a7f0095dcdf 100644
--- a/compiler/rustc_middle/src/middle/debugger_visualizer.rs
+++ b/compiler/rustc_middle/src/middle/debugger_visualizer.rs
@@ -1,15 +1,9 @@
 use std::path::PathBuf;
 use std::sync::Arc;
 
+use rustc_hir::attrs::DebuggerVisualizerType;
 use rustc_macros::{Decodable, Encodable, HashStable};
 
-#[derive(HashStable)]
-#[derive(Copy, PartialEq, PartialOrd, Clone, Ord, Eq, Hash, Debug, Encodable, Decodable)]
-pub enum DebuggerVisualizerType {
-    Natvis,
-    GdbPrettyPrinter,
-}
-
 /// A single debugger visualizer file.
 #[derive(HashStable)]
 #[derive(Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Encodable, Decodable)]
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs
index 0e645a3aae4..326df9239aa 100644
--- a/compiler/rustc_middle/src/query/mod.rs
+++ b/compiler/rustc_middle/src/query/mod.rs
@@ -124,7 +124,7 @@ use crate::query::plumbing::{
 };
 use crate::traits::query::{
     CanonicalAliasGoal, CanonicalDropckOutlivesGoal, CanonicalImpliedOutlivesBoundsGoal,
-    CanonicalPredicateGoal, CanonicalTyGoal, CanonicalTypeOpAscribeUserTypeGoal,
+    CanonicalMethodAutoderefStepsGoal, CanonicalPredicateGoal, CanonicalTypeOpAscribeUserTypeGoal,
     CanonicalTypeOpNormalizeGoal, CanonicalTypeOpProvePredicateGoal, DropckConstraint,
     DropckOutlivesResult, MethodAutoderefStepsResult, NoSolution, NormalizationResult,
     OutlivesBound,
@@ -2559,9 +2559,9 @@ rustc_queries! {
     }
 
     query method_autoderef_steps(
-        goal: CanonicalTyGoal<'tcx>
+        goal: CanonicalMethodAutoderefStepsGoal<'tcx>
     ) -> MethodAutoderefStepsResult<'tcx> {
-        desc { "computing autoderef types for `{}`", goal.canonical.value.value }
+        desc { "computing autoderef types for `{}`", goal.canonical.value.value.self_ty }
     }
 
     /// Used by `-Znext-solver` to compute proof trees.
diff --git a/compiler/rustc_middle/src/traits/query.rs b/compiler/rustc_middle/src/traits/query.rs
index 3f6faa1a572..c5cd7c54e4e 100644
--- a/compiler/rustc_middle/src/traits/query.rs
+++ b/compiler/rustc_middle/src/traits/query.rs
@@ -10,6 +10,7 @@ use rustc_span::Span;
 
 use crate::error::DropCheckOverflow;
 use crate::infer::canonical::{Canonical, CanonicalQueryInput, QueryResponse};
+use crate::traits::solve;
 pub use crate::traits::solve::NoSolution;
 use crate::ty::{self, GenericArg, Ty, TyCtxt};
 
@@ -67,7 +68,16 @@ pub mod type_op {
 pub type CanonicalAliasGoal<'tcx> =
     CanonicalQueryInput<'tcx, ty::ParamEnvAnd<'tcx, ty::AliasTy<'tcx>>>;
 
-pub type CanonicalTyGoal<'tcx> = CanonicalQueryInput<'tcx, ty::ParamEnvAnd<'tcx, Ty<'tcx>>>;
+pub type CanonicalMethodAutoderefStepsGoal<'tcx> =
+    CanonicalQueryInput<'tcx, ty::ParamEnvAnd<'tcx, MethodAutoderefSteps<'tcx>>>;
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, HashStable, TypeFoldable, TypeVisitable)]
+pub struct MethodAutoderefSteps<'tcx> {
+    /// The list of opaque types currently in the storage.
+    ///
+    /// Only used by the new solver for now.
+    pub predefined_opaques_in_body: solve::PredefinedOpaques<'tcx>,
+    pub self_ty: Ty<'tcx>,
+}
 
 pub type CanonicalPredicateGoal<'tcx> =
     CanonicalQueryInput<'tcx, ty::ParamEnvAnd<'tcx, ty::Predicate<'tcx>>>;
@@ -144,6 +154,7 @@ impl<'tcx> FromIterator<DropckConstraint<'tcx>> for DropckConstraint<'tcx> {
 #[derive(Debug, HashStable)]
 pub struct CandidateStep<'tcx> {
     pub self_ty: Canonical<'tcx, QueryResponse<'tcx, Ty<'tcx>>>,
+    pub self_ty_is_opaque: bool,
     pub autoderefs: usize,
     /// `true` if the type results from a dereference of a raw pointer.
     /// when assembling candidates, we include these steps, but not when
diff --git a/compiler/rustc_middle/src/traits/solve.rs b/compiler/rustc_middle/src/traits/solve.rs
index ef5223de0e8..3343f270333 100644
--- a/compiler/rustc_middle/src/traits/solve.rs
+++ b/compiler/rustc_middle/src/traits/solve.rs
@@ -4,7 +4,7 @@ use rustc_type_ir as ir;
 pub use rustc_type_ir::solve::*;
 
 use crate::ty::{
-    self, FallibleTypeFolder, TyCtxt, TypeFoldable, TypeFolder, TypeVisitable, TypeVisitor,
+    self, FallibleTypeFolder, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeVisitable, TypeVisitor,
     try_visit,
 };
 
@@ -15,16 +15,7 @@ pub type CandidateSource<'tcx> = ir::solve::CandidateSource<TyCtxt<'tcx>>;
 pub type CanonicalInput<'tcx, P = ty::Predicate<'tcx>> = ir::solve::CanonicalInput<TyCtxt<'tcx>, P>;
 pub type CanonicalResponse<'tcx> = ir::solve::CanonicalResponse<TyCtxt<'tcx>>;
 
-#[derive(Debug, PartialEq, Eq, Copy, Clone, Hash, HashStable)]
-pub struct PredefinedOpaques<'tcx>(pub(crate) Interned<'tcx, PredefinedOpaquesData<TyCtxt<'tcx>>>);
-
-impl<'tcx> std::ops::Deref for PredefinedOpaques<'tcx> {
-    type Target = PredefinedOpaquesData<TyCtxt<'tcx>>;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
+pub type PredefinedOpaques<'tcx> = &'tcx ty::List<(ty::OpaqueTypeKey<'tcx>, Ty<'tcx>)>;
 
 #[derive(Debug, PartialEq, Eq, Copy, Clone, Hash, HashStable)]
 pub struct ExternalConstraints<'tcx>(
@@ -93,35 +84,3 @@ impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ExternalConstraints<'tcx> {
         self.normalization_nested_goals.visit_with(visitor)
     }
 }
-
-// FIXME: Having to clone `region_constraints` for folding feels bad and
-// probably isn't great wrt performance.
-//
-// Not sure how to fix this, maybe we should also intern `opaque_types` and
-// `region_constraints` here or something.
-impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PredefinedOpaques<'tcx> {
-    fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
-        self,
-        folder: &mut F,
-    ) -> Result<Self, F::Error> {
-        Ok(FallibleTypeFolder::cx(folder).mk_predefined_opaques_in_body(PredefinedOpaquesData {
-            opaque_types: self
-                .opaque_types
-                .iter()
-                .map(|opaque| opaque.try_fold_with(folder))
-                .collect::<Result<_, F::Error>>()?,
-        }))
-    }
-
-    fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
-        TypeFolder::cx(folder).mk_predefined_opaques_in_body(PredefinedOpaquesData {
-            opaque_types: self.opaque_types.iter().map(|opaque| opaque.fold_with(folder)).collect(),
-        })
-    }
-}
-
-impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for PredefinedOpaques<'tcx> {
-    fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
-        self.opaque_types.visit_with(visitor)
-    }
-}
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index 7d3e2c9965d..a42af7bb3e3 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -75,7 +75,7 @@ use crate::thir::Thir;
 use crate::traits;
 use crate::traits::solve::{
     self, CanonicalInput, ExternalConstraints, ExternalConstraintsData, PredefinedOpaques,
-    PredefinedOpaquesData, QueryResult, inspect,
+    QueryResult, inspect,
 };
 use crate::ty::predicate::ExistentialPredicateStableCmpExt as _;
 use crate::ty::{
@@ -116,7 +116,7 @@ impl<'tcx> Interner for TyCtxt<'tcx> {
 
     fn mk_predefined_opaques_in_body(
         self,
-        data: PredefinedOpaquesData<Self>,
+        data: &[(ty::OpaqueTypeKey<'tcx>, Ty<'tcx>)],
     ) -> Self::PredefinedOpaques {
         self.mk_predefined_opaques_in_body(data)
     }
@@ -941,7 +941,7 @@ pub struct CtxtInterners<'tcx> {
     layout: InternedSet<'tcx, LayoutData<FieldIdx, VariantIdx>>,
     adt_def: InternedSet<'tcx, AdtDefData>,
     external_constraints: InternedSet<'tcx, ExternalConstraintsData<TyCtxt<'tcx>>>,
-    predefined_opaques_in_body: InternedSet<'tcx, PredefinedOpaquesData<TyCtxt<'tcx>>>,
+    predefined_opaques_in_body: InternedSet<'tcx, List<(ty::OpaqueTypeKey<'tcx>, Ty<'tcx>)>>,
     fields: InternedSet<'tcx, List<FieldIdx>>,
     local_def_ids: InternedSet<'tcx, List<LocalDefId>>,
     captures: InternedSet<'tcx, List<&'tcx ty::CapturedPlace<'tcx>>>,
@@ -2748,8 +2748,6 @@ direct_interners! {
     adt_def: pub mk_adt_def_from_data(AdtDefData): AdtDef -> AdtDef<'tcx>,
     external_constraints: pub mk_external_constraints(ExternalConstraintsData<TyCtxt<'tcx>>):
         ExternalConstraints -> ExternalConstraints<'tcx>,
-    predefined_opaques_in_body: pub mk_predefined_opaques_in_body(PredefinedOpaquesData<TyCtxt<'tcx>>):
-        PredefinedOpaques -> PredefinedOpaques<'tcx>,
 }
 
 macro_rules! slice_interners {
@@ -2786,6 +2784,7 @@ slice_interners!(
     offset_of: pub mk_offset_of((VariantIdx, FieldIdx)),
     patterns: pub mk_patterns(Pattern<'tcx>),
     outlives: pub mk_outlives(ty::ArgOutlivesPredicate<'tcx>),
+    predefined_opaques_in_body: pub mk_predefined_opaques_in_body((ty::OpaqueTypeKey<'tcx>, Ty<'tcx>)),
 );
 
 impl<'tcx> TyCtxt<'tcx> {
@@ -3129,6 +3128,14 @@ impl<'tcx> TyCtxt<'tcx> {
         T::collect_and_apply(iter, |xs| self.mk_poly_existential_predicates(xs))
     }
 
+    pub fn mk_predefined_opaques_in_body_from_iter<I, T>(self, iter: I) -> T::Output
+    where
+        I: Iterator<Item = T>,
+        T: CollectAndApply<(ty::OpaqueTypeKey<'tcx>, Ty<'tcx>), PredefinedOpaques<'tcx>>,
+    {
+        T::collect_and_apply(iter, |xs| self.mk_predefined_opaques_in_body(xs))
+    }
+
     pub fn mk_clauses_from_iter<I, T>(self, iter: I) -> T::Output
     where
         I: Iterator<Item = T>,
diff --git a/compiler/rustc_middle/src/ty/structural_impls.rs b/compiler/rustc_middle/src/ty/structural_impls.rs
index 11d109b463d..8dc4dfd677b 100644
--- a/compiler/rustc_middle/src/ty/structural_impls.rs
+++ b/compiler/rustc_middle/src/ty/structural_impls.rs
@@ -796,6 +796,7 @@ macro_rules! list_fold {
 
 list_fold! {
     &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>> : mk_poly_existential_predicates,
+    &'tcx ty::List<(ty::OpaqueTypeKey<'tcx>, Ty<'tcx>)>: mk_predefined_opaques_in_body,
     &'tcx ty::List<PlaceElem<'tcx>> : mk_place_elems,
     &'tcx ty::List<ty::Pattern<'tcx>> : mk_patterns,
     &'tcx ty::List<ty::ArgOutlivesPredicate<'tcx>> : mk_outlives,
diff --git a/compiler/rustc_mir_build/src/builder/mod.rs b/compiler/rustc_mir_build/src/builder/mod.rs
index cdb2c5561ce..7ca94e655fb 100644
--- a/compiler/rustc_mir_build/src/builder/mod.rs
+++ b/compiler/rustc_mir_build/src/builder/mod.rs
@@ -395,12 +395,10 @@ enum NeedsTemporary {
     Maybe,
 }
 
-///////////////////////////////////////////////////////////////////////////
 /// The `BlockAnd` "monad" packages up the new basic block along with a
 /// produced value (sometimes just unit, of course). The `unpack!`
 /// macro (and methods below) makes working with `BlockAnd` much more
 /// convenient.
-
 #[must_use = "if you don't use one of these results, you're leaving a dangling edge"]
 struct BlockAnd<T>(BasicBlock, T);
 
@@ -438,9 +436,7 @@ macro_rules! unpack {
     }};
 }
 
-///////////////////////////////////////////////////////////////////////////
-/// the main entry point for building MIR for a function
-
+/// The main entry point for building MIR for a function.
 fn construct_fn<'tcx>(
     tcx: TyCtxt<'tcx>,
     fn_def: LocalDefId,
diff --git a/compiler/rustc_next_trait_solver/src/canonical/mod.rs b/compiler/rustc_next_trait_solver/src/canonical/mod.rs
index e3520e238ed..b036ee6df7e 100644
--- a/compiler/rustc_next_trait_solver/src/canonical/mod.rs
+++ b/compiler/rustc_next_trait_solver/src/canonical/mod.rs
@@ -25,7 +25,7 @@ use crate::delegate::SolverDelegate;
 use crate::resolve::eager_resolve_vars;
 use crate::solve::{
     CanonicalInput, CanonicalResponse, Certainty, ExternalConstraintsData, Goal,
-    NestedNormalizationGoals, PredefinedOpaquesData, QueryInput, Response, inspect,
+    NestedNormalizationGoals, QueryInput, Response, inspect,
 };
 
 pub mod canonicalizer;
@@ -53,7 +53,7 @@ impl<I: Interner, T> ResponseT<I> for inspect::State<I, T> {
 pub(super) fn canonicalize_goal<D, I>(
     delegate: &D,
     goal: Goal<I, I::Predicate>,
-    opaque_types: Vec<(ty::OpaqueTypeKey<I>, I::Ty)>,
+    opaque_types: &[(ty::OpaqueTypeKey<I>, I::Ty)],
 ) -> (Vec<I::GenericArg>, CanonicalInput<I, I::Predicate>)
 where
     D: SolverDelegate<Interner = I>,
@@ -65,9 +65,7 @@ where
         &mut orig_values,
         QueryInput {
             goal,
-            predefined_opaques_in_body: delegate
-                .cx()
-                .mk_predefined_opaques_in_body(PredefinedOpaquesData { opaque_types }),
+            predefined_opaques_in_body: delegate.cx().mk_predefined_opaques_in_body(opaque_types),
         },
     );
     let query_input = ty::CanonicalQueryInput { canonical, typing_mode: delegate.typing_mode() };
diff --git a/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs b/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs
index bb86357a85f..85110530ae9 100644
--- a/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs
@@ -194,7 +194,7 @@ where
     D: SolverDelegate<Interner = I>,
     I: Interner,
 {
-    #[instrument(level = "debug", skip(self))]
+    #[instrument(level = "debug", skip(self), ret)]
     fn evaluate_root_goal(
         &self,
         goal: Goal<I, I::Predicate>,
@@ -206,6 +206,7 @@ where
         })
     }
 
+    #[instrument(level = "debug", skip(self), ret)]
     fn root_goal_may_hold_opaque_types_jank(
         &self,
         goal: Goal<Self::Interner, <Self::Interner as Interner>::Predicate>,
@@ -357,7 +358,7 @@ where
         f: impl FnOnce(&mut EvalCtxt<'_, D>, Goal<I, I::Predicate>) -> R,
     ) -> R {
         let (ref delegate, input, var_values) = D::build_with_canonical(cx, &canonical_input);
-        for &(key, ty) in &input.predefined_opaques_in_body.opaque_types {
+        for (key, ty) in input.predefined_opaques_in_body.iter() {
             let prev = delegate.register_hidden_type_in_storage(key, ty, I::Span::dummy());
             // It may be possible that two entries in the opaque type storage end up
             // with the same key after resolving contained inference variables.
@@ -467,7 +468,7 @@ where
         let opaque_types = self.delegate.clone_opaque_types_lookup_table();
         let (goal, opaque_types) = eager_resolve_vars(self.delegate, (goal, opaque_types));
 
-        let (orig_values, canonical_goal) = canonicalize_goal(self.delegate, goal, opaque_types);
+        let (orig_values, canonical_goal) = canonicalize_goal(self.delegate, goal, &opaque_types);
         let canonical_result = self.search_graph.evaluate_goal(
             self.cx(),
             canonical_goal,
@@ -548,7 +549,6 @@ where
                             .canonical
                             .value
                             .predefined_opaques_in_body
-                            .opaque_types
                             .len(),
                         stalled_vars,
                         sub_roots,
@@ -1557,7 +1557,7 @@ pub(super) fn evaluate_root_goal_for_proof_tree<D: SolverDelegate<Interner = I>,
     let opaque_types = delegate.clone_opaque_types_lookup_table();
     let (goal, opaque_types) = eager_resolve_vars(delegate, (goal, opaque_types));
 
-    let (orig_values, canonical_goal) = canonicalize_goal(delegate, goal, opaque_types);
+    let (orig_values, canonical_goal) = canonicalize_goal(delegate, goal, &opaque_types);
 
     let (canonical_result, final_revision) =
         delegate.cx().evaluate_root_goal_for_proof_tree_raw(canonical_goal);
diff --git a/compiler/rustc_next_trait_solver/src/solve/mod.rs b/compiler/rustc_next_trait_solver/src/solve/mod.rs
index afb86aaf8ab..a58caeecc33 100644
--- a/compiler/rustc_next_trait_solver/src/solve/mod.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/mod.rs
@@ -381,6 +381,7 @@ where
 }
 
 /// The result of evaluating a goal.
+#[derive_where(Debug; I: Interner)]
 pub struct GoalEvaluation<I: Interner> {
     /// The goal we've evaluated. This is the input goal, but potentially with its
     /// inference variables resolved. This never applies any inference constraints
diff --git a/compiler/rustc_passes/messages.ftl b/compiler/rustc_passes/messages.ftl
index 6cd68380e46..870e0a90b54 100644
--- a/compiler/rustc_passes/messages.ftl
+++ b/compiler/rustc_passes/messages.ftl
@@ -93,15 +93,6 @@ passes_dead_codes =
        }
     } never {$participle}
 
-passes_debug_visualizer_invalid =
-    invalid argument
-    .note_1 = expected: `natvis_file = "..."`
-    .note_2 = OR
-    .note_3 = expected: `gdb_script_file = "..."`
-
-passes_debug_visualizer_placement =
-    attribute should be applied to a module
-
 passes_debug_visualizer_unreadable =
     couldn't read {$file}: {$error}
 
diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs
index aef123c3721..007353f136d 100644
--- a/compiler/rustc_passes/src/check_attr.rs
+++ b/compiler/rustc_passes/src/check_attr.rs
@@ -282,6 +282,7 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
                     | AttributeKind::ObjcClass { .. }
                     | AttributeKind::ObjcSelector { .. }
                     | AttributeKind::RustcCoherenceIsCore(..)
+                    | AttributeKind::DebuggerVisualizer(..)
                 ) => { /* do nothing  */ }
                 Attribute::Unparsed(attr_item) => {
                     style = Some(attr_item.style);
@@ -302,7 +303,6 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
                             &mut doc_aliases,
                         ),
                         [sym::no_link, ..] => self.check_no_link(hir_id, attr, span, target),
-                        [sym::debugger_visualizer, ..] => self.check_debugger_visualizer(attr, target),
                         [sym::rustc_no_implicit_autorefs, ..] => {
                             self.check_applied_to_fn_or_method(hir_id, attr.span(), span, target)
                         }
@@ -1783,20 +1783,6 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
         }
     }
 
-    /// Checks if the items on the `#[debugger_visualizer]` attribute are valid.
-    fn check_debugger_visualizer(&self, attr: &Attribute, target: Target) {
-        // Here we only check that the #[debugger_visualizer] attribute is attached
-        // to nothing other than a module. All other checks are done in the
-        // `debugger_visualizer` query where they need to be done for decoding
-        // anyway.
-        match target {
-            Target::Mod => {}
-            _ => {
-                self.dcx().emit_err(errors::DebugVisualizerPlacement { span: attr.span() });
-            }
-        }
-    }
-
     /// Outputs an error for `#[allow_internal_unstable]` which can only be applied to macros.
     /// (Allows proc_macro functions)
     fn check_rustc_allow_const_fn_unstable(
diff --git a/compiler/rustc_passes/src/debugger_visualizer.rs b/compiler/rustc_passes/src/debugger_visualizer.rs
index 7a7a8175e55..7211f3cf85b 100644
--- a/compiler/rustc_passes/src/debugger_visualizer.rs
+++ b/compiler/rustc_passes/src/debugger_visualizer.rs
@@ -1,67 +1,60 @@
 //! Detecting usage of the `#[debugger_visualizer]` attribute.
 
-use rustc_ast::Attribute;
+use rustc_ast::ast::NodeId;
+use rustc_ast::{HasNodeId, ItemKind, ast};
+use rustc_attr_parsing::AttributeParser;
 use rustc_expand::base::resolve_path;
-use rustc_middle::middle::debugger_visualizer::{DebuggerVisualizerFile, DebuggerVisualizerType};
+use rustc_hir::Attribute;
+use rustc_hir::attrs::{AttributeKind, DebugVisualizer};
+use rustc_middle::middle::debugger_visualizer::DebuggerVisualizerFile;
 use rustc_middle::query::{LocalCrate, Providers};
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
-use rustc_span::sym;
+use rustc_span::{DUMMY_SP, Span, sym};
 
-use crate::errors::{DebugVisualizerInvalid, DebugVisualizerUnreadable};
+use crate::errors::DebugVisualizerUnreadable;
 
 impl DebuggerVisualizerCollector<'_> {
-    fn check_for_debugger_visualizer(&mut self, attr: &Attribute) {
-        if attr.has_name(sym::debugger_visualizer) {
-            let Some(hints) = attr.meta_item_list() else {
-                self.sess.dcx().emit_err(DebugVisualizerInvalid { span: attr.span });
-                return;
-            };
+    fn check_for_debugger_visualizer(
+        &mut self,
+        attrs: &[ast::Attribute],
+        span: Span,
+        node_id: NodeId,
+    ) {
+        if let Some(Attribute::Parsed(AttributeKind::DebuggerVisualizer(visualizers))) =
+            AttributeParser::parse_limited(
+                &self.sess,
+                attrs,
+                sym::debugger_visualizer,
+                span,
+                node_id,
+                None,
+            )
+        {
+            for DebugVisualizer { span, visualizer_type, path } in visualizers {
+                let file = match resolve_path(&self.sess, path.as_str(), span) {
+                    Ok(file) => file,
+                    Err(err) => {
+                        err.emit();
+                        return;
+                    }
+                };
 
-            let [hint] = hints.as_slice() else {
-                self.sess.dcx().emit_err(DebugVisualizerInvalid { span: attr.span });
-                return;
-            };
-
-            let Some(meta_item) = hint.meta_item() else {
-                self.sess.dcx().emit_err(DebugVisualizerInvalid { span: attr.span });
-                return;
-            };
-
-            let (visualizer_type, visualizer_path) = match (meta_item.name(), meta_item.value_str())
-            {
-                (Some(sym::natvis_file), Some(value)) => (DebuggerVisualizerType::Natvis, value),
-                (Some(sym::gdb_script_file), Some(value)) => {
-                    (DebuggerVisualizerType::GdbPrettyPrinter, value)
-                }
-                (_, _) => {
-                    self.sess.dcx().emit_err(DebugVisualizerInvalid { span: meta_item.span });
-                    return;
-                }
-            };
-
-            let file = match resolve_path(&self.sess, visualizer_path.as_str(), attr.span) {
-                Ok(file) => file,
-                Err(err) => {
-                    err.emit();
-                    return;
-                }
-            };
-
-            match self.sess.source_map().load_binary_file(&file) {
-                Ok((source, _)) => {
-                    self.visualizers.push(DebuggerVisualizerFile::new(
-                        source,
-                        visualizer_type,
-                        file,
-                    ));
-                }
-                Err(error) => {
-                    self.sess.dcx().emit_err(DebugVisualizerUnreadable {
-                        span: meta_item.span,
-                        file: &file,
-                        error,
-                    });
+                match self.sess.source_map().load_binary_file(&file) {
+                    Ok((source, _)) => {
+                        self.visualizers.push(DebuggerVisualizerFile::new(
+                            source,
+                            visualizer_type,
+                            file,
+                        ));
+                    }
+                    Err(error) => {
+                        self.sess.dcx().emit_err(DebugVisualizerUnreadable {
+                            span,
+                            file: &file,
+                            error,
+                        });
+                    }
                 }
             }
         }
@@ -74,9 +67,15 @@ struct DebuggerVisualizerCollector<'a> {
 }
 
 impl<'ast> rustc_ast::visit::Visitor<'ast> for DebuggerVisualizerCollector<'_> {
-    fn visit_attribute(&mut self, attr: &'ast Attribute) {
-        self.check_for_debugger_visualizer(attr);
-        rustc_ast::visit::walk_attribute(self, attr);
+    fn visit_item(&mut self, item: &'ast rustc_ast::Item) -> Self::Result {
+        if let ItemKind::Mod(..) = item.kind {
+            self.check_for_debugger_visualizer(&item.attrs, item.span, item.node_id());
+        }
+        rustc_ast::visit::walk_item(self, item);
+    }
+    fn visit_crate(&mut self, krate: &'ast ast::Crate) -> Self::Result {
+        self.check_for_debugger_visualizer(&krate.attrs, DUMMY_SP, krate.id);
+        rustc_ast::visit::walk_crate(self, krate);
     }
 }
 
diff --git a/compiler/rustc_passes/src/errors.rs b/compiler/rustc_passes/src/errors.rs
index cd8935f6b2f..cfd6b9e6dff 100644
--- a/compiler/rustc_passes/src/errors.rs
+++ b/compiler/rustc_passes/src/errors.rs
@@ -476,23 +476,6 @@ pub(crate) struct MacroOnlyAttribute {
 }
 
 #[derive(Diagnostic)]
-#[diag(passes_debug_visualizer_placement)]
-pub(crate) struct DebugVisualizerPlacement {
-    #[primary_span]
-    pub span: Span,
-}
-
-#[derive(Diagnostic)]
-#[diag(passes_debug_visualizer_invalid)]
-#[note(passes_note_1)]
-#[note(passes_note_2)]
-#[note(passes_note_3)]
-pub(crate) struct DebugVisualizerInvalid {
-    #[primary_span]
-    pub span: Span,
-}
-
-#[derive(Diagnostic)]
 #[diag(passes_debug_visualizer_unreadable)]
 pub(crate) struct DebugVisualizerUnreadable<'a> {
     #[primary_span]
diff --git a/compiler/rustc_privacy/src/lib.rs b/compiler/rustc_privacy/src/lib.rs
index 1bddbd03cc3..c9dbb204f61 100644
--- a/compiler/rustc_privacy/src/lib.rs
+++ b/compiler/rustc_privacy/src/lib.rs
@@ -45,7 +45,7 @@ use tracing::debug;
 rustc_fluent_macro::fluent_messages! { "../messages.ftl" }
 
 ////////////////////////////////////////////////////////////////////////////////
-/// Generic infrastructure used to implement specific visitors below.
+// Generic infrastructure used to implement specific visitors below.
 ////////////////////////////////////////////////////////////////////////////////
 
 struct LazyDefPathStr<'tcx> {
@@ -309,10 +309,7 @@ fn min(vis1: ty::Visibility, vis2: ty::Visibility, tcx: TyCtxt<'_>) -> ty::Visib
     if vis1.is_at_least(vis2, tcx) { vis2 } else { vis1 }
 }
 
-////////////////////////////////////////////////////////////////////////////////
 /// Visitor used to determine impl visibility and reachability.
-////////////////////////////////////////////////////////////////////////////////
-
 struct FindMin<'a, 'tcx, VL: VisibilityLike, const SHALLOW: bool> {
     tcx: TyCtxt<'tcx>,
     effective_visibilities: &'a EffectiveVisibilities,
@@ -387,10 +384,7 @@ impl VisibilityLike for EffectiveVisibility {
     }
 }
 
-////////////////////////////////////////////////////////////////////////////////
 /// The embargo visitor, used to determine the exports of the AST.
-////////////////////////////////////////////////////////////////////////////////
-
 struct EmbargoVisitor<'tcx> {
     tcx: TyCtxt<'tcx>,
 
@@ -849,9 +843,7 @@ impl<'tcx> DefIdVisitor<'tcx> for ReachEverythingInTheInterfaceVisitor<'_, 'tcx>
     }
 }
 
-////////////////////////////////////////////////////////////////////////////////
 /// Visitor, used for EffectiveVisibilities table checking
-////////////////////////////////////////////////////////////////////////////////
 pub struct TestReachabilityVisitor<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,
     effective_visibilities: &'a EffectiveVisibilities,
@@ -909,13 +901,11 @@ impl<'a, 'tcx> TestReachabilityVisitor<'a, 'tcx> {
     }
 }
 
-//////////////////////////////////////////////////////////////////////////////////////
 /// Name privacy visitor, checks privacy and reports violations.
+///
 /// Most of name privacy checks are performed during the main resolution phase,
 /// or later in type checking when field accesses and associated items are resolved.
 /// This pass performs remaining checks for fields in struct expressions and patterns.
-//////////////////////////////////////////////////////////////////////////////////////
-
 struct NamePrivacyVisitor<'tcx> {
     tcx: TyCtxt<'tcx>,
     maybe_typeck_results: Option<&'tcx ty::TypeckResults<'tcx>>,
@@ -1120,12 +1110,10 @@ impl<'tcx> Visitor<'tcx> for NamePrivacyVisitor<'tcx> {
     }
 }
 
-////////////////////////////////////////////////////////////////////////////////////////////
 /// Type privacy visitor, checks types for privacy and reports violations.
+///
 /// Both explicitly written types and inferred types of expressions and patterns are checked.
 /// Checks are performed on "semantic" types regardless of names and their hygiene.
-////////////////////////////////////////////////////////////////////////////////////////////
-
 struct TypePrivacyVisitor<'tcx> {
     tcx: TyCtxt<'tcx>,
     module_def_id: LocalModDefId,
@@ -1345,13 +1333,11 @@ impl<'tcx> DefIdVisitor<'tcx> for TypePrivacyVisitor<'tcx> {
     }
 }
 
-///////////////////////////////////////////////////////////////////////////////
 /// SearchInterfaceForPrivateItemsVisitor traverses an item's interface and
 /// finds any private components in it.
+///
 /// PrivateItemsInPublicInterfacesVisitor ensures there are no private types
 /// and traits in public interfaces.
-///////////////////////////////////////////////////////////////////////////////
-
 struct SearchInterfaceForPrivateItemsVisitor<'tcx> {
     tcx: TyCtxt<'tcx>,
     item_def_id: LocalDefId,
diff --git a/compiler/rustc_resolve/src/build_reduced_graph.rs b/compiler/rustc_resolve/src/build_reduced_graph.rs
index fa3c06059b3..c10b6ca7e71 100644
--- a/compiler/rustc_resolve/src/build_reduced_graph.rs
+++ b/compiler/rustc_resolve/src/build_reduced_graph.rs
@@ -5,7 +5,6 @@
 //! unexpanded macros in the fragment are visited and registered.
 //! Imports are also considered items and placed into modules here, but not resolved yet.
 
-use std::cell::Cell;
 use std::sync::Arc;
 
 use rustc_ast::visit::{self, AssocCtxt, Visitor, WalkItemKind};
@@ -35,6 +34,7 @@ use crate::Namespace::{MacroNS, TypeNS, ValueNS};
 use crate::def_collector::collect_definitions;
 use crate::imports::{ImportData, ImportKind};
 use crate::macros::{MacroRulesBinding, MacroRulesScope, MacroRulesScopeRef};
+use crate::ref_mut::CmCell;
 use crate::{
     BindingKey, ExternPreludeEntry, Finalize, MacroData, Module, ModuleKind, ModuleOrUniformRoot,
     NameBinding, ParentScope, PathResult, ResolutionError, Resolver, Segment, Used,
@@ -87,7 +87,8 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
         // because they can be fetched by glob imports from those modules, and bring traits
         // into scope both directly and through glob imports.
         let key = BindingKey::new_disambiguated(ident, ns, || {
-            parent.underscore_disambiguator.update(|d| d + 1);
+            // FIXME(batched): Will be fixed in batched resolution.
+            parent.underscore_disambiguator.update_unchecked(|d| d + 1);
             parent.underscore_disambiguator.get()
         });
         if self
@@ -477,7 +478,7 @@ impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
             kind,
             parent_scope: self.parent_scope,
             module_path,
-            imported_module: Cell::new(None),
+            imported_module: CmCell::new(None),
             span,
             use_span: item.span,
             use_span_with_attributes: item.span_with_attributes(),
@@ -505,7 +506,7 @@ impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
                     });
                 }
             }
-            ImportKind::Glob { .. } => current_module.globs.borrow_mut().push(import),
+            ImportKind::Glob { .. } => current_module.globs.borrow_mut(self.r).push(import),
             _ => unreachable!(),
         }
     }
@@ -668,7 +669,7 @@ impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
             }
             ast::UseTreeKind::Glob => {
                 if !ast::attr::contains_name(&item.attrs, sym::prelude_import) {
-                    let kind = ImportKind::Glob { max_vis: Cell::new(None), id };
+                    let kind = ImportKind::Glob { max_vis: CmCell::new(None), id };
                     self.add_import(prefix, kind, use_tree.span, item, root_span, item.id, vis);
                 } else {
                     // Resolve the prelude import early.
@@ -971,7 +972,7 @@ impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
             kind: ImportKind::ExternCrate { source: orig_name, target: ident, id: item.id },
             root_id: item.id,
             parent_scope: self.parent_scope,
-            imported_module: Cell::new(module),
+            imported_module: CmCell::new(module),
             has_attributes: !item.attrs.is_empty(),
             use_span_with_attributes: item.span_with_attributes(),
             use_span: item.span,
@@ -1103,7 +1104,7 @@ impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
                 kind: ImportKind::MacroUse { warn_private },
                 root_id: item.id,
                 parent_scope: this.parent_scope,
-                imported_module: Cell::new(Some(ModuleOrUniformRoot::Module(module))),
+                imported_module: CmCell::new(Some(ModuleOrUniformRoot::Module(module))),
                 use_span_with_attributes: item.span_with_attributes(),
                 has_attributes: !item.attrs.is_empty(),
                 use_span: item.span,
@@ -1196,7 +1197,7 @@ impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
     /// directly into its parent scope's module.
     fn visit_invoc_in_module(&mut self, id: NodeId) -> MacroRulesScopeRef<'ra> {
         let invoc_id = self.visit_invoc(id);
-        self.parent_scope.module.unexpanded_invocations.borrow_mut().insert(invoc_id);
+        self.parent_scope.module.unexpanded_invocations.borrow_mut(self.r).insert(invoc_id);
         self.r.arenas.alloc_macro_rules_scope(MacroRulesScope::Invocation(invoc_id))
     }
 
@@ -1274,7 +1275,7 @@ impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
                     kind: ImportKind::MacroExport,
                     root_id: item.id,
                     parent_scope: self.parent_scope,
-                    imported_module: Cell::new(None),
+                    imported_module: CmCell::new(None),
                     has_attributes: false,
                     use_span_with_attributes: span,
                     use_span: span,
diff --git a/compiler/rustc_resolve/src/ident.rs b/compiler/rustc_resolve/src/ident.rs
index 35051675fd8..51489019950 100644
--- a/compiler/rustc_resolve/src/ident.rs
+++ b/compiler/rustc_resolve/src/ident.rs
@@ -492,14 +492,13 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
                         _ => Err(Determinacy::Determined),
                     },
                     Scope::Module(module, derive_fallback_lint_id) => {
-                        // FIXME: use `finalize_scope` here.
                         let (adjusted_parent_scope, adjusted_finalize) =
                             if matches!(scope_set, ScopeSet::ModuleAndExternPrelude(..)) {
-                                (parent_scope, finalize)
+                                (parent_scope, finalize_scope!())
                             } else {
                                 (
                                     &ParentScope { module, ..*parent_scope },
-                                    finalize.map(|f| Finalize { used: Used::Scope, ..f }),
+                                    finalize_scope!().map(|f| Finalize { used: Used::Scope, ..f }),
                                 )
                             };
                         let binding = this.reborrow().resolve_ident_in_module_unadjusted(
@@ -557,8 +556,10 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
                         None => Err(Determinacy::Determined),
                     },
                     Scope::ExternPreludeItems => {
-                        // FIXME: use `finalize_scope` here.
-                        match this.reborrow().extern_prelude_get_item(ident, finalize.is_some()) {
+                        match this
+                            .reborrow()
+                            .extern_prelude_get_item(ident, finalize_scope!().is_some())
+                        {
                             Some(binding) => {
                                 extern_prelude_item_binding = Some(binding);
                                 Ok((binding, Flags::empty()))
diff --git a/compiler/rustc_resolve/src/imports.rs b/compiler/rustc_resolve/src/imports.rs
index 33c2c7436d1..ce90a1bcd31 100644
--- a/compiler/rustc_resolve/src/imports.rs
+++ b/compiler/rustc_resolve/src/imports.rs
@@ -1,6 +1,5 @@
 //! A bunch of methods and structures more or less related to resolving imports.
 
-use std::cell::Cell;
 use std::mem;
 
 use rustc_ast::NodeId;
@@ -32,6 +31,7 @@ use crate::errors::{
     CannotBeReexportedPrivateNS, CannotDetermineImportResolution, CannotGlobImportAllCrates,
     ConsiderAddingMacroExport, ConsiderMarkingAsPub, ConsiderMarkingAsPubCrate,
 };
+use crate::ref_mut::CmCell;
 use crate::{
     AmbiguityError, AmbiguityKind, BindingKey, CmResolver, Determinacy, Finalize, ImportSuggestion,
     Module, ModuleOrUniformRoot, NameBinding, NameBindingData, NameBindingKind, ParentScope,
@@ -68,7 +68,7 @@ pub(crate) enum ImportKind<'ra> {
         /// It will directly use `source` when the format is `use prefix::source`.
         target: Ident,
         /// Bindings introduced by the import.
-        bindings: PerNS<Cell<PendingBinding<'ra>>>,
+        bindings: PerNS<CmCell<PendingBinding<'ra>>>,
         /// `true` for `...::{self [as target]}` imports, `false` otherwise.
         type_ns_only: bool,
         /// Did this import result from a nested import? ie. `use foo::{bar, baz};`
@@ -89,7 +89,7 @@ pub(crate) enum ImportKind<'ra> {
     Glob {
         // The visibility of the greatest re-export.
         // n.b. `max_vis` is only used in `finalize_import` to check for re-export errors.
-        max_vis: Cell<Option<Visibility>>,
+        max_vis: CmCell<Option<Visibility>>,
         id: NodeId,
     },
     ExternCrate {
@@ -182,7 +182,7 @@ pub(crate) struct ImportData<'ra> {
     /// |`use ::foo`      | `ModuleOrUniformRoot::ExternPrelude`          | 2018+ editions |
     /// |`use ::foo`      | `ModuleOrUniformRoot::ModuleAndExternPrelude` | a special case in 2015 edition |
     /// |`use foo`        | `ModuleOrUniformRoot::CurrentScope`           | - |
-    pub imported_module: Cell<Option<ModuleOrUniformRoot<'ra>>>,
+    pub imported_module: CmCell<Option<ModuleOrUniformRoot<'ra>>>,
     pub vis: Visibility,
 
     /// Span of the visibility.
@@ -320,7 +320,8 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
             && (vis == import_vis
                 || max_vis.get().is_none_or(|max_vis| vis.is_at_least(max_vis, self.tcx)))
         {
-            max_vis.set(Some(vis.expect_local()))
+            // FIXME(batched): Will be fixed in batched import resolution.
+            max_vis.set_unchecked(Some(vis.expect_local()))
         }
 
         self.arenas.alloc_name_binding(NameBindingData {
@@ -349,7 +350,8 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
         // because they can be fetched by glob imports from those modules, and bring traits
         // into scope both directly and through glob imports.
         let key = BindingKey::new_disambiguated(ident, ns, || {
-            module.underscore_disambiguator.update(|d| d + 1);
+            // FIXME(batched): Will be fixed in batched resolution.
+            module.underscore_disambiguator.update_unchecked(|d| d + 1);
             module.underscore_disambiguator.get()
         });
         self.update_local_resolution(module, key, warn_ambiguity, |this, resolution| {
@@ -482,7 +484,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
             }
         };
 
-        let Ok(glob_importers) = module.glob_importers.try_borrow_mut() else {
+        let Ok(glob_importers) = module.glob_importers.try_borrow_mut_unchecked() else {
             return t;
         };
 
@@ -862,7 +864,8 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
             }
         };
 
-        import.imported_module.set(Some(module));
+        // FIXME(batched): Will be fixed in batched import resolution.
+        import.imported_module.set_unchecked(Some(module));
         let (source, target, bindings, type_ns_only) = match import.kind {
             ImportKind::Single { source, target, ref bindings, type_ns_only, .. } => {
                 (source, target, bindings, type_ns_only)
@@ -937,7 +940,8 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
                         PendingBinding::Pending
                     }
                 };
-                bindings[ns].set(binding);
+                // FIXME(batched): Will be fixed in batched import resolution.
+                bindings[ns].set_unchecked(binding);
             }
         });
 
@@ -1508,7 +1512,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
         }
 
         // Add to module's glob_importers
-        module.glob_importers.borrow_mut().push(import);
+        module.glob_importers.borrow_mut_unchecked().push(import);
 
         // Ensure that `resolutions` isn't borrowed during `try_define`,
         // since it might get updated via a glob cycle.
@@ -1550,7 +1554,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
     // reporting conflicts, and reporting unresolved imports.
     fn finalize_resolutions_in(&mut self, module: Module<'ra>) {
         // Since import resolution is finished, globs will not define any more names.
-        *module.globs.borrow_mut() = Vec::new();
+        *module.globs.borrow_mut(self) = Vec::new();
 
         let Some(def_id) = module.opt_def_id() else { return };
 
diff --git a/compiler/rustc_resolve/src/lib.rs b/compiler/rustc_resolve/src/lib.rs
index 8b185ce7ef2..8959068b2a6 100644
--- a/compiler/rustc_resolve/src/lib.rs
+++ b/compiler/rustc_resolve/src/lib.rs
@@ -19,6 +19,7 @@
 #![feature(default_field_values)]
 #![feature(if_let_guard)]
 #![feature(iter_intersperse)]
+#![feature(ptr_as_ref_unchecked)]
 #![feature(rustc_attrs)]
 #![feature(rustdoc_internals)]
 #![recursion_limit = "256"]
@@ -26,7 +27,7 @@
 
 use std::cell::{Cell, Ref, RefCell};
 use std::collections::BTreeSet;
-use std::fmt;
+use std::fmt::{self};
 use std::sync::Arc;
 
 use diagnostics::{ImportSuggestion, LabelSuggestion, Suggestion};
@@ -95,6 +96,8 @@ pub mod rustdoc;
 
 pub use macros::registered_tools_ast;
 
+use crate::ref_mut::{CmCell, CmRefCell};
+
 rustc_fluent_macro::fluent_messages! { "../messages.ftl" }
 
 #[derive(Debug)]
@@ -592,22 +595,22 @@ struct ModuleData<'ra> {
     /// Resolutions in modules from other crates are not populated until accessed.
     lazy_resolutions: Resolutions<'ra>,
     /// True if this is a module from other crate that needs to be populated on access.
-    populate_on_access: Cell<bool>,
+    populate_on_access: Cell<bool>, // FIXME(parallel): Use an atomic in parallel import resolution
     /// Used to disambiguate underscore items (`const _: T = ...`) in the module.
-    underscore_disambiguator: Cell<u32>,
+    underscore_disambiguator: CmCell<u32>,
 
     /// Macro invocations that can expand into items in this module.
-    unexpanded_invocations: RefCell<FxHashSet<LocalExpnId>>,
+    unexpanded_invocations: CmRefCell<FxHashSet<LocalExpnId>>,
 
     /// Whether `#[no_implicit_prelude]` is active.
     no_implicit_prelude: bool,
 
-    glob_importers: RefCell<Vec<Import<'ra>>>,
-    globs: RefCell<Vec<Import<'ra>>>,
+    glob_importers: CmRefCell<Vec<Import<'ra>>>,
+    globs: CmRefCell<Vec<Import<'ra>>>,
 
     /// Used to memoize the traits in this module for faster searches through all traits in scope.
     traits:
-        RefCell<Option<Box<[(Macros20NormalizedIdent, NameBinding<'ra>, Option<Module<'ra>>)]>>>,
+        CmRefCell<Option<Box<[(Macros20NormalizedIdent, NameBinding<'ra>, Option<Module<'ra>>)]>>>,
 
     /// Span of the module itself. Used for error reporting.
     span: Span,
@@ -656,12 +659,12 @@ impl<'ra> ModuleData<'ra> {
             kind,
             lazy_resolutions: Default::default(),
             populate_on_access: Cell::new(is_foreign),
-            underscore_disambiguator: Cell::new(0),
+            underscore_disambiguator: CmCell::new(0),
             unexpanded_invocations: Default::default(),
             no_implicit_prelude,
-            glob_importers: RefCell::new(Vec::new()),
-            globs: RefCell::new(Vec::new()),
-            traits: RefCell::new(None),
+            glob_importers: CmRefCell::new(Vec::new()),
+            globs: CmRefCell::new(Vec::new()),
+            traits: CmRefCell::new(None),
             span,
             expansion,
             self_binding,
@@ -696,7 +699,7 @@ impl<'ra> Module<'ra> {
 
     /// This modifies `self` in place. The traits will be stored in `self.traits`.
     fn ensure_traits<'tcx>(self, resolver: &impl AsRef<Resolver<'ra, 'tcx>>) {
-        let mut traits = self.traits.borrow_mut();
+        let mut traits = self.traits.borrow_mut(resolver.as_ref());
         if traits.is_none() {
             let mut collected_traits = Vec::new();
             self.for_each_child(resolver, |r, name, ns, binding| {
@@ -1974,6 +1977,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
 
     fn resolutions(&self, module: Module<'ra>) -> &'ra Resolutions<'ra> {
         if module.populate_on_access.get() {
+            // FIXME(batched): Will be fixed in batched import resolution.
             module.populate_on_access.set(false);
             self.build_reduced_graph_external(module);
         }
@@ -2504,9 +2508,20 @@ pub fn provide(providers: &mut Providers) {
     providers.registered_tools = macros::registered_tools;
 }
 
+/// A wrapper around `&mut Resolver` that may be mutable or immutable, depending on a conditions.
+///
+/// `Cm` stands for "conditionally mutable".
+///
+/// Prefer constructing it through [`Resolver::cm`] to ensure correctness.
+type CmResolver<'r, 'ra, 'tcx> = ref_mut::RefOrMut<'r, Resolver<'ra, 'tcx>>;
+
 mod ref_mut {
+    use std::cell::{BorrowMutError, Cell, Ref, RefCell, RefMut};
+    use std::fmt;
     use std::ops::Deref;
 
+    use crate::Resolver;
+
     /// A wrapper around a mutable reference that conditionally allows mutable access.
     pub(crate) struct RefOrMut<'a, T> {
         p: &'a mut T,
@@ -2555,11 +2570,86 @@ mod ref_mut {
             self.p
         }
     }
-}
 
-/// A wrapper around `&mut Resolver` that may be mutable or immutable, depending on a conditions.
-///
-/// `Cm` stands for "conditionally mutable".
-///
-/// Prefer constructing it through [`Resolver::cm`] to ensure correctness.
-type CmResolver<'r, 'ra, 'tcx> = ref_mut::RefOrMut<'r, Resolver<'ra, 'tcx>>;
+    /// A wrapper around a [`Cell`] that only allows mutation based on a condition in the resolver.
+    #[derive(Default)]
+    pub(crate) struct CmCell<T>(Cell<T>);
+
+    impl<T: Copy + fmt::Debug> fmt::Debug for CmCell<T> {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            f.debug_tuple("CmCell").field(&self.get()).finish()
+        }
+    }
+
+    impl<T: Copy> Clone for CmCell<T> {
+        #[inline]
+        fn clone(&self) -> CmCell<T> {
+            CmCell::new(self.get())
+        }
+    }
+
+    impl<T: Copy> CmCell<T> {
+        pub(crate) const fn get(&self) -> T {
+            self.0.get()
+        }
+
+        pub(crate) fn update_unchecked(&self, f: impl FnOnce(T) -> T)
+        where
+            T: Copy,
+        {
+            let old = self.get();
+            self.set_unchecked(f(old));
+        }
+    }
+
+    impl<T> CmCell<T> {
+        pub(crate) const fn new(value: T) -> CmCell<T> {
+            CmCell(Cell::new(value))
+        }
+
+        pub(crate) fn set_unchecked(&self, val: T) {
+            self.0.set(val);
+        }
+
+        pub(crate) fn into_inner(self) -> T {
+            self.0.into_inner()
+        }
+    }
+
+    /// A wrapper around a [`RefCell`] that only allows mutable borrows based on a condition in the resolver.
+    #[derive(Default)]
+    pub(crate) struct CmRefCell<T>(RefCell<T>);
+
+    impl<T> CmRefCell<T> {
+        pub(crate) const fn new(value: T) -> CmRefCell<T> {
+            CmRefCell(RefCell::new(value))
+        }
+
+        #[inline]
+        #[track_caller]
+        pub(crate) fn borrow_mut_unchecked(&self) -> RefMut<'_, T> {
+            self.0.borrow_mut()
+        }
+
+        #[inline]
+        #[track_caller]
+        pub(crate) fn borrow_mut<'ra, 'tcx>(&self, r: &Resolver<'ra, 'tcx>) -> RefMut<'_, T> {
+            if r.assert_speculative {
+                panic!("Not allowed to mutably borrow a CmRefCell during speculative resolution");
+            }
+            self.borrow_mut_unchecked()
+        }
+
+        #[inline]
+        #[track_caller]
+        pub(crate) fn try_borrow_mut_unchecked(&self) -> Result<RefMut<'_, T>, BorrowMutError> {
+            self.0.try_borrow_mut()
+        }
+
+        #[inline]
+        #[track_caller]
+        pub(crate) fn borrow(&self) -> Ref<'_, T> {
+            self.0.borrow()
+        }
+    }
+}
diff --git a/compiler/rustc_resolve/src/macros.rs b/compiler/rustc_resolve/src/macros.rs
index d3e98ef839b..c50dfd41b51 100644
--- a/compiler/rustc_resolve/src/macros.rs
+++ b/compiler/rustc_resolve/src/macros.rs
@@ -189,7 +189,7 @@ impl<'ra, 'tcx> ResolverExpand for Resolver<'ra, 'tcx> {
         let output_macro_rules_scope = self.build_reduced_graph(fragment, parent_scope);
         self.output_macro_rules_scopes.insert(expansion, output_macro_rules_scope);
 
-        parent_scope.module.unexpanded_invocations.borrow_mut().remove(&expansion);
+        parent_scope.module.unexpanded_invocations.borrow_mut(self).remove(&expansion);
         if let Some(unexpanded_invocations) =
             self.impl_unexpanded_invocations.get_mut(&self.invocation_parent(expansion))
         {
diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs
index e95b743b1ce..35dbbe58db9 100644
--- a/compiler/rustc_span/src/lib.rs
+++ b/compiler/rustc_span/src/lib.rs
@@ -17,7 +17,6 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
-#![cfg_attr(bootstrap, feature(round_char_boundary))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(array_windows)]
diff --git a/compiler/rustc_target/src/spec/base/windows_gnu.rs b/compiler/rustc_target/src/spec/base/windows_gnu.rs
index 4ba11021988..2867428e42f 100644
--- a/compiler/rustc_target/src/spec/base/windows_gnu.rs
+++ b/compiler/rustc_target/src/spec/base/windows_gnu.rs
@@ -93,10 +93,7 @@ pub(crate) fn opts() -> TargetOptions {
         binary_format: BinaryFormat::Coff,
         allows_weak_linkage: false,
         pre_link_args,
-        pre_link_objects: crt_objects::pre_mingw(),
-        post_link_objects: crt_objects::post_mingw(),
         pre_link_objects_self_contained: crt_objects::pre_mingw_self_contained(),
-        post_link_objects_self_contained: crt_objects::post_mingw_self_contained(),
         link_self_contained: LinkSelfContainedDefault::InferredForMingw,
         late_link_args,
         late_link_args_dynamic,
diff --git a/compiler/rustc_target/src/spec/crt_objects.rs b/compiler/rustc_target/src/spec/crt_objects.rs
index e3b6430a463..2d84e78f255 100644
--- a/compiler/rustc_target/src/spec/crt_objects.rs
+++ b/compiler/rustc_target/src/spec/crt_objects.rs
@@ -86,6 +86,17 @@ pub(super) fn post_musl_self_contained() -> CrtObjects {
 
 pub(super) fn pre_mingw_self_contained() -> CrtObjects {
     new(&[
+        (LinkOutputKind::DynamicNoPicExe, &["crt2.o"]),
+        (LinkOutputKind::DynamicPicExe, &["crt2.o"]),
+        (LinkOutputKind::StaticNoPicExe, &["crt2.o"]),
+        (LinkOutputKind::StaticPicExe, &["crt2.o"]),
+        (LinkOutputKind::DynamicDylib, &["dllcrt2.o"]),
+        (LinkOutputKind::StaticDylib, &["dllcrt2.o"]),
+    ])
+}
+
+pub(super) fn pre_i686_mingw_self_contained() -> CrtObjects {
+    new(&[
         (LinkOutputKind::DynamicNoPicExe, &["crt2.o", "rsbegin.o"]),
         (LinkOutputKind::DynamicPicExe, &["crt2.o", "rsbegin.o"]),
         (LinkOutputKind::StaticNoPicExe, &["crt2.o", "rsbegin.o"]),
@@ -95,15 +106,15 @@ pub(super) fn pre_mingw_self_contained() -> CrtObjects {
     ])
 }
 
-pub(super) fn post_mingw_self_contained() -> CrtObjects {
+pub(super) fn post_i686_mingw_self_contained() -> CrtObjects {
     all("rsend.o")
 }
 
-pub(super) fn pre_mingw() -> CrtObjects {
+pub(super) fn pre_i686_mingw() -> CrtObjects {
     all("rsbegin.o")
 }
 
-pub(super) fn post_mingw() -> CrtObjects {
+pub(super) fn post_i686_mingw() -> CrtObjects {
     all("rsend.o")
 }
 
diff --git a/compiler/rustc_target/src/spec/targets/armebv7r_none_eabi.rs b/compiler/rustc_target/src/spec/targets/armebv7r_none_eabi.rs
index d227d63c4a3..0ae7cd7a377 100644
--- a/compiler/rustc_target/src/spec/targets/armebv7r_none_eabi.rs
+++ b/compiler/rustc_target/src/spec/targets/armebv7r_none_eabi.rs
@@ -12,7 +12,7 @@ pub(crate) fn target() -> Target {
         llvm_target: "armebv7r-none-eabi".into(),
         metadata: TargetMetadata {
             description: Some("Bare Armv7-R, Big Endian".into()),
-            tier: Some(2),
+            tier: Some(3),
             host_tools: Some(false),
             std: Some(false),
         },
diff --git a/compiler/rustc_target/src/spec/targets/armebv7r_none_eabihf.rs b/compiler/rustc_target/src/spec/targets/armebv7r_none_eabihf.rs
index c373afb914e..71ffd8baed5 100644
--- a/compiler/rustc_target/src/spec/targets/armebv7r_none_eabihf.rs
+++ b/compiler/rustc_target/src/spec/targets/armebv7r_none_eabihf.rs
@@ -12,7 +12,7 @@ pub(crate) fn target() -> Target {
         llvm_target: "armebv7r-none-eabihf".into(),
         metadata: TargetMetadata {
             description: Some("Bare Armv7-R, Big Endian, hardfloat".into()),
-            tier: Some(2),
+            tier: Some(3),
             host_tools: Some(false),
             std: Some(false),
         },
diff --git a/compiler/rustc_target/src/spec/targets/i686_pc_windows_gnu.rs b/compiler/rustc_target/src/spec/targets/i686_pc_windows_gnu.rs
index e775c8fc524..a0d403bd05e 100644
--- a/compiler/rustc_target/src/spec/targets/i686_pc_windows_gnu.rs
+++ b/compiler/rustc_target/src/spec/targets/i686_pc_windows_gnu.rs
@@ -1,4 +1,6 @@
-use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, RustcAbi, Target, TargetMetadata, base};
+use crate::spec::{
+    Cc, FramePointer, LinkerFlavor, Lld, RustcAbi, Target, TargetMetadata, base, crt_objects,
+};
 
 pub(crate) fn target() -> Target {
     let mut base = base::windows_gnu::opts();
@@ -15,6 +17,10 @@ pub(crate) fn target() -> Target {
         &["-m", "i386pe", "--large-address-aware"],
     );
     base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-Wl,--large-address-aware"]);
+    base.pre_link_objects = crt_objects::pre_i686_mingw();
+    base.post_link_objects = crt_objects::post_i686_mingw();
+    base.pre_link_objects_self_contained = crt_objects::pre_i686_mingw_self_contained();
+    base.post_link_objects_self_contained = crt_objects::post_i686_mingw_self_contained();
 
     Target {
         llvm_target: "i686-pc-windows-gnu".into(),
diff --git a/compiler/rustc_trait_selection/src/infer.rs b/compiler/rustc_trait_selection/src/infer.rs
index 4c50c44b841..cd076d1cb69 100644
--- a/compiler/rustc_trait_selection/src/infer.rs
+++ b/compiler/rustc_trait_selection/src/infer.rs
@@ -9,7 +9,7 @@ use rustc_middle::infer::canonical::{
     Canonical, CanonicalQueryInput, CanonicalQueryResponse, QueryResponse,
 };
 use rustc_middle::traits::query::NoSolution;
-use rustc_middle::ty::{self, GenericArg, Ty, TyCtxt, TypeFoldable, TypeVisitableExt, Upcast};
+use rustc_middle::ty::{self, GenericArg, Ty, TyCtxt, TypeFoldable, Upcast};
 use rustc_span::DUMMY_SP;
 use tracing::instrument;
 
@@ -31,19 +31,7 @@ impl<'tcx> InferCtxt<'tcx> {
 
     fn type_is_copy_modulo_regions(&self, param_env: ty::ParamEnv<'tcx>, ty: Ty<'tcx>) -> bool {
         let ty = self.resolve_vars_if_possible(ty);
-
-        // FIXME(#132279): This should be removed as it causes us to incorrectly
-        // handle opaques in their defining scope, and stalled coroutines.
-        if !self.next_trait_solver() && !(param_env, ty).has_infer() && !ty.has_coroutines() {
-            return self.tcx.type_is_copy_modulo_regions(self.typing_env(param_env), ty);
-        }
-
         let copy_def_id = self.tcx.require_lang_item(LangItem::Copy, DUMMY_SP);
-
-        // This can get called from typeck (by euv), and `moves_by_default`
-        // rightly refuses to work with inference variables, but
-        // moves_by_default has a cache, which we want to use in other
-        // cases.
         traits::type_known_to_meet_bound_modulo_regions(self, param_env, ty, copy_def_id)
     }
 
diff --git a/compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs b/compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs
index ae731505abf..34e0176d213 100644
--- a/compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs
+++ b/compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs
@@ -1,6 +1,6 @@
 use rustc_infer::traits::solve::Goal;
 use rustc_macros::extension;
-use rustc_middle::span_bug;
+use rustc_middle::{span_bug, ty};
 use rustc_next_trait_solver::solve::SolverDelegateEvalExt;
 
 use crate::infer::InferCtxt;
@@ -22,7 +22,7 @@ impl<'tcx> InferCtxt<'tcx> {
     /// for more details.
     fn predicate_may_hold_opaque_types_jank(&self, obligation: &PredicateObligation<'tcx>) -> bool {
         if self.next_trait_solver() {
-            <&SolverDelegate<'tcx>>::from(self).root_goal_may_hold_opaque_types_jank(Goal::new(
+            self.goal_may_hold_opaque_types_jank(Goal::new(
                 self.tcx,
                 obligation.param_env,
                 obligation.predicate,
@@ -32,6 +32,13 @@ impl<'tcx> InferCtxt<'tcx> {
         }
     }
 
+    /// See the comment on [OpaqueTypesJank](crate::solve::OpaqueTypesJank)
+    /// for more details.
+    fn goal_may_hold_opaque_types_jank(&self, goal: Goal<'tcx, ty::Predicate<'tcx>>) -> bool {
+        assert!(self.next_trait_solver());
+        <&SolverDelegate<'tcx>>::from(self).root_goal_may_hold_opaque_types_jank(goal)
+    }
+
     /// Evaluates whether the predicate can be satisfied in the given
     /// `ParamEnv`, and returns `false` if not certain. However, this is
     /// not entirely accurate if inference variables are involved.
diff --git a/compiler/rustc_type_ir/src/interner.rs b/compiler/rustc_type_ir/src/interner.rs
index cf58aec14a6..886d1a78bcb 100644
--- a/compiler/rustc_type_ir/src/interner.rs
+++ b/compiler/rustc_type_ir/src/interner.rs
@@ -11,9 +11,7 @@ use crate::inherent::*;
 use crate::ir_print::IrPrint;
 use crate::lang_items::{SolverAdtLangItem, SolverLangItem, SolverTraitLangItem};
 use crate::relate::Relate;
-use crate::solve::{
-    CanonicalInput, ExternalConstraintsData, PredefinedOpaquesData, QueryResult, inspect,
-};
+use crate::solve::{CanonicalInput, ExternalConstraintsData, QueryResult, inspect};
 use crate::visit::{Flags, TypeVisitable};
 use crate::{self as ty, CanonicalParamEnvCacheEntry, search_graph};
 
@@ -70,10 +68,10 @@ pub trait Interner:
         + Hash
         + Eq
         + TypeFoldable<Self>
-        + Deref<Target = PredefinedOpaquesData<Self>>;
+        + SliceLike<Item = (ty::OpaqueTypeKey<Self>, Self::Ty)>;
     fn mk_predefined_opaques_in_body(
         self,
-        data: PredefinedOpaquesData<Self>,
+        data: &[(ty::OpaqueTypeKey<Self>, Self::Ty)],
     ) -> Self::PredefinedOpaques;
 
     type LocalDefIds: Copy
diff --git a/compiler/rustc_type_ir/src/solve/mod.rs b/compiler/rustc_type_ir/src/solve/mod.rs
index 1a1606d8268..9d9a8e49847 100644
--- a/compiler/rustc_type_ir/src/solve/mod.rs
+++ b/compiler/rustc_type_ir/src/solve/mod.rs
@@ -109,19 +109,6 @@ pub struct QueryInput<I: Interner, P> {
 
 impl<I: Interner, P: Eq> Eq for QueryInput<I, P> {}
 
-/// Opaques that are defined in the inference context before a query is called.
-#[derive_where(Clone, Hash, PartialEq, Debug, Default; I: Interner)]
-#[derive(TypeVisitable_Generic, TypeFoldable_Generic)]
-#[cfg_attr(
-    feature = "nightly",
-    derive(Decodable_NoContext, Encodable_NoContext, HashStable_NoContext)
-)]
-pub struct PredefinedOpaquesData<I: Interner> {
-    pub opaque_types: Vec<(ty::OpaqueTypeKey<I>, I::Ty)>,
-}
-
-impl<I: Interner> Eq for PredefinedOpaquesData<I> {}
-
 /// Possible ways the given goal can be proven.
 #[derive_where(Clone, Copy, Hash, PartialEq, Debug; I: Interner)]
 pub enum CandidateSource<I: Interner> {
diff --git a/library/alloc/src/boxed.rs b/library/alloc/src/boxed.rs
index 1c549f7b6ba..5a63d90b95f 100644
--- a/library/alloc/src/boxed.rs
+++ b/library/alloc/src/boxed.rs
@@ -1706,7 +1706,7 @@ impl Default for Box<str> {
 }
 
 #[cfg(not(no_global_oom_handling))]
-#[stable(feature = "pin_default_impls", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "pin_default_impls", since = "1.91.0")]
 impl<T> Default for Pin<Box<T>>
 where
     T: ?Sized,
diff --git a/library/alloc/src/collections/btree/map.rs b/library/alloc/src/collections/btree/map.rs
index e3b53b2fe29..9dfbbd91322 100644
--- a/library/alloc/src/collections/btree/map.rs
+++ b/library/alloc/src/collections/btree/map.rs
@@ -1456,7 +1456,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// assert_eq!(low.keys().copied().collect::<Vec<_>>(), [0, 1, 2, 3]);
     /// assert_eq!(high.keys().copied().collect::<Vec<_>>(), [4, 5, 6, 7]);
     /// ```
-    #[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "btree_extract_if", since = "1.91.0")]
     pub fn extract_if<F, R>(&mut self, range: R, pred: F) -> ExtractIf<'_, K, V, R, F, A>
     where
         K: Ord,
@@ -1943,7 +1943,7 @@ impl<K, V> Default for Values<'_, K, V> {
 }
 
 /// An iterator produced by calling `extract_if` on BTreeMap.
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 #[must_use = "iterators are lazy and do nothing unless consumed"]
 pub struct ExtractIf<
     'a,
@@ -1976,7 +1976,7 @@ pub(super) struct ExtractIfInner<'a, K, V, R> {
     range: R,
 }
 
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 impl<K, V, R, F, A> fmt::Debug for ExtractIf<'_, K, V, R, F, A>
 where
     K: fmt::Debug,
@@ -1988,7 +1988,7 @@ where
     }
 }
 
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 impl<K, V, R, F, A: Allocator + Clone> Iterator for ExtractIf<'_, K, V, R, F, A>
 where
     K: PartialOrd,
@@ -2062,7 +2062,7 @@ impl<'a, K, V, R> ExtractIfInner<'a, K, V, R> {
     }
 }
 
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 impl<K, V, R, F> FusedIterator for ExtractIf<'_, K, V, R, F>
 where
     K: PartialOrd,
diff --git a/library/alloc/src/collections/btree/set.rs b/library/alloc/src/collections/btree/set.rs
index e6b0a1f6323..6e6996bcbd6 100644
--- a/library/alloc/src/collections/btree/set.rs
+++ b/library/alloc/src/collections/btree/set.rs
@@ -1218,7 +1218,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
     /// assert_eq!(low.into_iter().collect::<Vec<_>>(), [0, 1, 2, 3]);
     /// assert_eq!(high.into_iter().collect::<Vec<_>>(), [4, 5, 6, 7]);
     /// ```
-    #[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "btree_extract_if", since = "1.91.0")]
     pub fn extract_if<F, R>(&mut self, range: R, pred: F) -> ExtractIf<'_, T, R, F, A>
     where
         T: Ord,
@@ -1553,7 +1553,7 @@ impl<'a, T, A: Allocator + Clone> IntoIterator for &'a BTreeSet<T, A> {
 }
 
 /// An iterator produced by calling `extract_if` on BTreeSet.
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 #[must_use = "iterators are lazy and do nothing unless consumed"]
 pub struct ExtractIf<
     'a,
@@ -1568,7 +1568,7 @@ pub struct ExtractIf<
     alloc: A,
 }
 
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 impl<T, R, F, A> fmt::Debug for ExtractIf<'_, T, R, F, A>
 where
     T: fmt::Debug,
@@ -1581,7 +1581,7 @@ where
     }
 }
 
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 impl<T, R, F, A: Allocator + Clone> Iterator for ExtractIf<'_, T, R, F, A>
 where
     T: PartialOrd,
@@ -1601,7 +1601,7 @@ where
     }
 }
 
-#[stable(feature = "btree_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "btree_extract_if", since = "1.91.0")]
 impl<T, R, F, A: Allocator + Clone> FusedIterator for ExtractIf<'_, T, R, F, A>
 where
     T: PartialOrd,
diff --git a/library/alloc/src/rc.rs b/library/alloc/src/rc.rs
index aed3357afbf..627e5c7f976 100644
--- a/library/alloc/src/rc.rs
+++ b/library/alloc/src/rc.rs
@@ -2377,7 +2377,7 @@ impl<T> Default for Rc<[T]> {
 }
 
 #[cfg(not(no_global_oom_handling))]
-#[stable(feature = "pin_default_impls", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "pin_default_impls", since = "1.91.0")]
 impl<T> Default for Pin<Rc<T>>
 where
     T: ?Sized,
diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index a466b74944c..3a8695d34a8 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -3636,7 +3636,7 @@ impl<T> Default for Arc<[T]> {
 }
 
 #[cfg(not(no_global_oom_handling))]
-#[stable(feature = "pin_default_impls", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "pin_default_impls", since = "1.91.0")]
 impl<T> Default for Pin<Arc<T>>
 where
     T: ?Sized,
diff --git a/library/alloctests/tests/lib.rs b/library/alloctests/tests/lib.rs
index cba9883e148..49fb21ef5f3 100644
--- a/library/alloctests/tests/lib.rs
+++ b/library/alloctests/tests/lib.rs
@@ -47,7 +47,6 @@
 #![deny(unsafe_op_in_unsafe_fn)]
 
 extern crate alloc;
-extern crate test;
 
 use std::hash::{DefaultHasher, Hash, Hasher};
 
diff --git a/library/core/src/any.rs b/library/core/src/any.rs
index 76ea2d18a82..3ab95438c3f 100644
--- a/library/core/src/any.rs
+++ b/library/core/src/any.rs
@@ -774,7 +774,7 @@ impl TypeId {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_type_id", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_type_id", since = "1.91.0")]
     pub const fn of<T: ?Sized + 'static>() -> TypeId {
         const { intrinsics::type_id::<T>() }
     }
diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs
index d713e575b58..0dc10758a85 100644
--- a/library/core/src/array/mod.rs
+++ b/library/core/src/array/mod.rs
@@ -49,7 +49,7 @@ pub use iter::IntoIter;
 /// ```
 #[inline]
 #[must_use = "cloning is often expensive and is not expected to have side effects"]
-#[stable(feature = "array_repeat", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "array_repeat", since = "1.91.0")]
 pub fn repeat<T: Clone, const N: usize>(val: T) -> [T; N] {
     from_trusted_iterator(repeat_n(val, N))
 }
@@ -627,7 +627,7 @@ impl<T, const N: usize> [T; N] {
     /// assert_eq!(strings.len(), 3);
     /// ```
     #[stable(feature = "array_methods", since = "1.77.0")]
-    #[rustc_const_stable(feature = "const_array_each_ref", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_array_each_ref", since = "1.91.0")]
     pub const fn each_ref(&self) -> [&T; N] {
         let mut buf = [null::<T>(); N];
 
@@ -658,7 +658,7 @@ impl<T, const N: usize> [T; N] {
     /// assert_eq!(floats, [0.0, 2.7, -1.0]);
     /// ```
     #[stable(feature = "array_methods", since = "1.77.0")]
-    #[rustc_const_stable(feature = "const_array_each_ref", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_array_each_ref", since = "1.91.0")]
     pub const fn each_mut(&mut self) -> [&mut T; N] {
         let mut buf = [null_mut::<T>(); N];
 
diff --git a/library/core/src/cell.rs b/library/core/src/cell.rs
index 7d4a66640b1..6aadb7a86cd 100644
--- a/library/core/src/cell.rs
+++ b/library/core/src/cell.rs
@@ -705,8 +705,8 @@ impl<T, const N: usize> Cell<[T; N]> {
     /// let cell_array: &Cell<[i32; 3]> = Cell::from_mut(&mut array);
     /// let array_cell: &[Cell<i32>; 3] = cell_array.as_array_of_cells();
     /// ```
-    #[stable(feature = "as_array_of_cells", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "as_array_of_cells", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "as_array_of_cells", since = "1.91.0")]
+    #[rustc_const_stable(feature = "as_array_of_cells", since = "1.91.0")]
     pub const fn as_array_of_cells(&self) -> &[Cell<T>; N] {
         // SAFETY: `Cell<T>` has the same memory layout as `T`.
         unsafe { &*(self as *const Cell<[T; N]> as *const [Cell<T>; N]) }
diff --git a/library/core/src/iter/adapters/chain.rs b/library/core/src/iter/adapters/chain.rs
index 3ebdf7b4727..0ece54554d4 100644
--- a/library/core/src/iter/adapters/chain.rs
+++ b/library/core/src/iter/adapters/chain.rs
@@ -60,7 +60,7 @@ impl<A, B> Chain<A, B> {
 /// assert_eq!(iter.next(), Some(6));
 /// assert_eq!(iter.next(), None);
 /// ```
-#[stable(feature = "iter_chain", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "iter_chain", since = "1.91.0")]
 pub fn chain<A, B>(a: A, b: B) -> Chain<A::IntoIter, B::IntoIter>
 where
     A: IntoIterator,
diff --git a/library/core/src/iter/adapters/mod.rs b/library/core/src/iter/adapters/mod.rs
index 6c6de0a4e5c..1ff5093922b 100644
--- a/library/core/src/iter/adapters/mod.rs
+++ b/library/core/src/iter/adapters/mod.rs
@@ -32,7 +32,7 @@ mod zip;
 pub use self::array_chunks::ArrayChunks;
 #[unstable(feature = "std_internals", issue = "none")]
 pub use self::by_ref_sized::ByRefSized;
-#[stable(feature = "iter_chain", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "iter_chain", since = "1.91.0")]
 pub use self::chain::chain;
 #[stable(feature = "iter_cloned", since = "1.1.0")]
 pub use self::cloned::Cloned;
diff --git a/library/core/src/iter/mod.rs b/library/core/src/iter/mod.rs
index bc07324f520..c7e1c4ef767 100644
--- a/library/core/src/iter/mod.rs
+++ b/library/core/src/iter/mod.rs
@@ -404,7 +404,7 @@ pub use self::adapters::StepBy;
 pub use self::adapters::TrustedRandomAccess;
 #[unstable(feature = "trusted_random_access", issue = "none")]
 pub use self::adapters::TrustedRandomAccessNoCoerce;
-#[stable(feature = "iter_chain", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "iter_chain", since = "1.91.0")]
 pub use self::adapters::chain;
 pub(crate) use self::adapters::try_process;
 #[stable(feature = "iter_zip", since = "1.59.0")]
diff --git a/library/core/src/iter/traits/accum.rs b/library/core/src/iter/traits/accum.rs
index 3b805139ded..375b5ef5285 100644
--- a/library/core/src/iter/traits/accum.rs
+++ b/library/core/src/iter/traits/accum.rs
@@ -148,7 +148,7 @@ macro_rules! saturating_integer_sum_product {
         saturating_integer_sum_product!(@impls Saturating(0), Saturating(1),
                 "The short-circuiting behavior of this implementation is unspecified. If you care about \
                 short-circuiting, use [`Iterator::fold`] directly.",
-                #[stable(feature = "saturating_iter_arith", since = "CURRENT_RUSTC_VERSION")],
+                #[stable(feature = "saturating_iter_arith", since = "1.91.0")],
                 $(Saturating<$a>)*);
     );
 }
diff --git a/library/core/src/net/ip_addr.rs b/library/core/src/net/ip_addr.rs
index 9779fb8fe4d..a1bfd774710 100644
--- a/library/core/src/net/ip_addr.rs
+++ b/library/core/src/net/ip_addr.rs
@@ -631,8 +631,8 @@ impl Ipv4Addr {
     /// let addr = Ipv4Addr::from_octets([13u8, 12u8, 11u8, 10u8]);
     /// assert_eq!(Ipv4Addr::new(13, 12, 11, 10), addr);
     /// ```
-    #[stable(feature = "ip_from", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "ip_from", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "ip_from", since = "1.91.0")]
+    #[rustc_const_stable(feature = "ip_from", since = "1.91.0")]
     #[must_use]
     #[inline]
     pub const fn from_octets(octets: [u8; 4]) -> Ipv4Addr {
@@ -1478,8 +1478,8 @@ impl Ipv6Addr {
     ///     addr
     /// );
     /// ```
-    #[stable(feature = "ip_from", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "ip_from", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "ip_from", since = "1.91.0")]
+    #[rustc_const_stable(feature = "ip_from", since = "1.91.0")]
     #[must_use]
     #[inline]
     pub const fn from_segments(segments: [u16; 8]) -> Ipv6Addr {
@@ -2043,8 +2043,8 @@ impl Ipv6Addr {
     ///     addr
     /// );
     /// ```
-    #[stable(feature = "ip_from", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "ip_from", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "ip_from", since = "1.91.0")]
+    #[rustc_const_stable(feature = "ip_from", since = "1.91.0")]
     #[must_use]
     #[inline]
     pub const fn from_octets(octets: [u8; 16]) -> Ipv6Addr {
diff --git a/library/core/src/num/int_macros.rs b/library/core/src/num/int_macros.rs
index 0d80c40fb23..c3460a64090 100644
--- a/library/core/src/num/int_macros.rs
+++ b/library/core/src/num/int_macros.rs
@@ -519,8 +519,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (", stringify!($SelfT), "::MAX - 2).strict_add(3);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -609,8 +609,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (", stringify!($SelfT), "::MAX - 2).strict_add_unsigned(3);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -659,8 +659,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (", stringify!($SelfT), "::MIN + 2).strict_sub(3);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -749,8 +749,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (", stringify!($SelfT), "::MIN + 2).strict_sub_unsigned(3);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -799,8 +799,8 @@ macro_rules! int_impl {
         /// ``` should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MAX.strict_mul(2);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -906,8 +906,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (1", stringify!($SelfT), ").strict_div(0);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -973,8 +973,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (1", stringify!($SelfT), ").strict_div_euclid(0);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1139,8 +1139,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MIN.strict_rem(-1);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1205,8 +1205,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MIN.strict_rem_euclid(-1);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1286,8 +1286,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MIN.strict_neg();")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1342,8 +1342,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 0x1", stringify!($SelfT), ".strict_shl(129);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1517,8 +1517,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 0x10", stringify!($SelfT), ".strict_shr(128);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1693,8 +1693,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MIN.strict_abs();")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1762,8 +1762,8 @@ macro_rules! int_impl {
         /// ```should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MAX.strict_pow(2);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
diff --git a/library/core/src/num/uint_macros.rs b/library/core/src/num/uint_macros.rs
index d68c7be9865..752498bfbd8 100644
--- a/library/core/src/num/uint_macros.rs
+++ b/library/core/src/num/uint_macros.rs
@@ -667,8 +667,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (", stringify!($SelfT), "::MAX - 2).strict_add(3);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -762,8 +762,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (", stringify!($SelfT), "::MAX - 2).strict_add_signed(3);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -821,8 +821,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 0", stringify!($SelfT), ".strict_sub(1);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -946,8 +946,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (", stringify!($SelfT), "::MAX).strict_sub_signed(-1);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1002,8 +1002,8 @@ macro_rules! uint_impl {
             "::MAX), Some(0));"
         )]
         /// ```
-        #[stable(feature = "unsigned_signed_diff", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "unsigned_signed_diff", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "unsigned_signed_diff", since = "1.91.0")]
+        #[rustc_const_stable(feature = "unsigned_signed_diff", since = "1.91.0")]
         #[inline]
         pub const fn checked_signed_diff(self, rhs: Self) -> Option<$SignedT> {
             let res = self.wrapping_sub(rhs) as $SignedT;
@@ -1055,8 +1055,8 @@ macro_rules! uint_impl {
         /// ``` should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MAX.strict_mul(2);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1151,8 +1151,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (1", stringify!($SelfT), ").strict_div(0);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
@@ -1205,8 +1205,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = (1", stringify!($SelfT), ").strict_div_euclid(0);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
@@ -1353,8 +1353,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 5", stringify!($SelfT), ".strict_rem(0);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
@@ -1409,8 +1409,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 5", stringify!($SelfT), ".strict_rem_euclid(0);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
@@ -1694,8 +1694,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 1", stringify!($SelfT), ".strict_neg();")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1750,8 +1750,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 0x10", stringify!($SelfT), ".strict_shl(129);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -1922,8 +1922,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = 0x10", stringify!($SelfT), ".strict_shr(129);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -2104,8 +2104,8 @@ macro_rules! uint_impl {
         /// ```should_panic
         #[doc = concat!("let _ = ", stringify!($SelfT), "::MAX.strict_pow(2);")]
         /// ```
-        #[stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
-        #[rustc_const_stable(feature = "strict_overflow_ops", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "strict_overflow_ops", since = "1.91.0")]
+        #[rustc_const_stable(feature = "strict_overflow_ops", since = "1.91.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -2682,7 +2682,7 @@ macro_rules! uint_impl {
         ///
         /// assert_eq!((sum1, sum0), (9, 6));
         /// ```
-        #[stable(feature = "unsigned_bigint_helpers", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "unsigned_bigint_helpers", since = "1.91.0")]
         #[rustc_const_unstable(feature = "bigint_helper_methods", issue = "85532")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
@@ -2774,7 +2774,7 @@ macro_rules! uint_impl {
         ///
         #[doc = concat!("assert_eq!((diff1, diff0), (3, ", stringify!($SelfT), "::MAX));")]
         /// ```
-        #[stable(feature = "unsigned_bigint_helpers", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "unsigned_bigint_helpers", since = "1.91.0")]
         #[rustc_const_unstable(feature = "bigint_helper_methods", issue = "85532")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
@@ -2991,7 +2991,7 @@ macro_rules! uint_impl {
         ///     789_u16.wrapping_mul(456).wrapping_add(123),
         /// );
         /// ```
-        #[stable(feature = "unsigned_bigint_helpers", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "unsigned_bigint_helpers", since = "1.91.0")]
         #[rustc_const_unstable(feature = "bigint_helper_methods", issue = "85532")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
@@ -3057,7 +3057,7 @@ macro_rules! uint_impl {
         ///     u32::to_le_bytes(0xcffc982d)
         /// );
         /// ```
-        #[stable(feature = "unsigned_bigint_helpers", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "unsigned_bigint_helpers", since = "1.91.0")]
         #[rustc_const_unstable(feature = "bigint_helper_methods", issue = "85532")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
diff --git a/library/core/src/ptr/mod.rs b/library/core/src/ptr/mod.rs
index 625024373ef..b29d2676542 100644
--- a/library/core/src/ptr/mod.rs
+++ b/library/core/src/ptr/mod.rs
@@ -975,7 +975,7 @@ pub const fn dangling_mut<T>() -> *mut T {
 #[must_use]
 #[inline(always)]
 #[stable(feature = "exposed_provenance", since = "1.84.0")]
-#[rustc_const_stable(feature = "const_exposed_provenance", since = "CURRENT_RUSTC_VERSION")]
+#[rustc_const_stable(feature = "const_exposed_provenance", since = "1.91.0")]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 #[allow(fuzzy_provenance_casts)] // this *is* the explicit provenance API one should use instead
 pub const fn with_exposed_provenance<T>(addr: usize) -> *const T {
@@ -1016,7 +1016,7 @@ pub const fn with_exposed_provenance<T>(addr: usize) -> *const T {
 #[must_use]
 #[inline(always)]
 #[stable(feature = "exposed_provenance", since = "1.84.0")]
-#[rustc_const_stable(feature = "const_exposed_provenance", since = "CURRENT_RUSTC_VERSION")]
+#[rustc_const_stable(feature = "const_exposed_provenance", since = "1.91.0")]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 #[allow(fuzzy_provenance_casts)] // this *is* the explicit provenance API one should use instead
 pub const fn with_exposed_provenance_mut<T>(addr: usize) -> *mut T {
diff --git a/library/core/src/str/mod.rs b/library/core/src/str/mod.rs
index 2e473d348b0..3a5efa7d835 100644
--- a/library/core/src/str/mod.rs
+++ b/library/core/src/str/mod.rs
@@ -404,8 +404,8 @@ impl str {
     /// assert_eq!(closest, 10);
     /// assert_eq!(&s[..closest], "❤️🧡");
     /// ```
-    #[stable(feature = "round_char_boundary", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "round_char_boundary", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "round_char_boundary", since = "1.91.0")]
+    #[rustc_const_stable(feature = "round_char_boundary", since = "1.91.0")]
     #[inline]
     pub const fn floor_char_boundary(&self, index: usize) -> usize {
         if index >= self.len() {
@@ -447,8 +447,8 @@ impl str {
     /// assert_eq!(closest, 14);
     /// assert_eq!(&s[..closest], "❤️🧡💛");
     /// ```
-    #[stable(feature = "round_char_boundary", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "round_char_boundary", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "round_char_boundary", since = "1.91.0")]
+    #[rustc_const_stable(feature = "round_char_boundary", since = "1.91.0")]
     #[inline]
     pub const fn ceil_char_boundary(&self, index: usize) -> usize {
         if index >= self.len() {
diff --git a/library/core/src/sync/atomic.rs b/library/core/src/sync/atomic.rs
index 1b4a54b1b7a..30a42d4eb5e 100644
--- a/library/core/src/sync/atomic.rs
+++ b/library/core/src/sync/atomic.rs
@@ -2208,7 +2208,7 @@ impl<T> AtomicPtr<T> {
     /// ```
     #[inline]
     #[cfg(target_has_atomic = "ptr")]
-    #[stable(feature = "strict_provenance_atomic_ptr", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "strict_provenance_atomic_ptr", since = "1.91.0")]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub fn fetch_ptr_add(&self, val: usize, order: Ordering) -> *mut T {
         self.fetch_byte_add(val.wrapping_mul(size_of::<T>()), order)
@@ -2252,7 +2252,7 @@ impl<T> AtomicPtr<T> {
     /// ```
     #[inline]
     #[cfg(target_has_atomic = "ptr")]
-    #[stable(feature = "strict_provenance_atomic_ptr", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "strict_provenance_atomic_ptr", since = "1.91.0")]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub fn fetch_ptr_sub(&self, val: usize, order: Ordering) -> *mut T {
         self.fetch_byte_sub(val.wrapping_mul(size_of::<T>()), order)
@@ -2286,7 +2286,7 @@ impl<T> AtomicPtr<T> {
     /// ```
     #[inline]
     #[cfg(target_has_atomic = "ptr")]
-    #[stable(feature = "strict_provenance_atomic_ptr", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "strict_provenance_atomic_ptr", since = "1.91.0")]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub fn fetch_byte_add(&self, val: usize, order: Ordering) -> *mut T {
         // SAFETY: data races are prevented by atomic intrinsics.
@@ -2321,7 +2321,7 @@ impl<T> AtomicPtr<T> {
     /// ```
     #[inline]
     #[cfg(target_has_atomic = "ptr")]
-    #[stable(feature = "strict_provenance_atomic_ptr", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "strict_provenance_atomic_ptr", since = "1.91.0")]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub fn fetch_byte_sub(&self, val: usize, order: Ordering) -> *mut T {
         // SAFETY: data races are prevented by atomic intrinsics.
@@ -2371,7 +2371,7 @@ impl<T> AtomicPtr<T> {
     /// ```
     #[inline]
     #[cfg(target_has_atomic = "ptr")]
-    #[stable(feature = "strict_provenance_atomic_ptr", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "strict_provenance_atomic_ptr", since = "1.91.0")]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub fn fetch_or(&self, val: usize, order: Ordering) -> *mut T {
         // SAFETY: data races are prevented by atomic intrinsics.
@@ -2420,7 +2420,7 @@ impl<T> AtomicPtr<T> {
     /// ```
     #[inline]
     #[cfg(target_has_atomic = "ptr")]
-    #[stable(feature = "strict_provenance_atomic_ptr", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "strict_provenance_atomic_ptr", since = "1.91.0")]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub fn fetch_and(&self, val: usize, order: Ordering) -> *mut T {
         // SAFETY: data races are prevented by atomic intrinsics.
@@ -2467,7 +2467,7 @@ impl<T> AtomicPtr<T> {
     /// ```
     #[inline]
     #[cfg(target_has_atomic = "ptr")]
-    #[stable(feature = "strict_provenance_atomic_ptr", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "strict_provenance_atomic_ptr", since = "1.91.0")]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub fn fetch_xor(&self, val: usize, order: Ordering) -> *mut T {
         // SAFETY: data races are prevented by atomic intrinsics.
diff --git a/library/core/src/time.rs b/library/core/src/time.rs
index d205bc376f1..f721fcd6156 100644
--- a/library/core/src/time.rs
+++ b/library/core/src/time.rs
@@ -416,8 +416,8 @@ impl Duration {
     /// assert_eq!(6 * 60 * 60, duration.as_secs());
     /// assert_eq!(0, duration.subsec_nanos());
     /// ```
-    #[stable(feature = "duration_constructors_lite", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "duration_constructors_lite", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "duration_constructors_lite", since = "1.91.0")]
+    #[rustc_const_stable(feature = "duration_constructors_lite", since = "1.91.0")]
     #[must_use]
     #[inline]
     pub const fn from_hours(hours: u64) -> Duration {
@@ -444,8 +444,8 @@ impl Duration {
     /// assert_eq!(10 * 60, duration.as_secs());
     /// assert_eq!(0, duration.subsec_nanos());
     /// ```
-    #[stable(feature = "duration_constructors_lite", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "duration_constructors_lite", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "duration_constructors_lite", since = "1.91.0")]
+    #[rustc_const_stable(feature = "duration_constructors_lite", since = "1.91.0")]
     #[must_use]
     #[inline]
     pub const fn from_mins(mins: u64) -> Duration {
diff --git a/library/coretests/tests/fmt/mod.rs b/library/coretests/tests/fmt/mod.rs
index 586e890befe..d0ae7124f47 100644
--- a/library/coretests/tests/fmt/mod.rs
+++ b/library/coretests/tests/fmt/mod.rs
@@ -12,6 +12,12 @@ fn test_lifetime() {
     let a = format_args!("hello {a} {a:?}");
     assert_eq!(a.to_string(), "hello hello hello hello hello hello hello");
 
+    // Check that temporaries as arguments are extended.
+    let b = format_args!("{}", String::new());
+    let c = format_args!("{}{}", String::new(), String::new());
+    assert_eq!(b.to_string(), "");
+    assert_eq!(c.to_string(), "");
+
     // Without arguments, it should also work in consts.
     const A: std::fmt::Arguments<'static> = format_args!("hello");
     assert_eq!(A.to_string(), "hello");
diff --git a/library/std/src/ffi/os_str.rs b/library/std/src/ffi/os_str.rs
index a39565d2159..6c098034eea 100644
--- a/library/std/src/ffi/os_str.rs
+++ b/library/std/src/ffi/os_str.rs
@@ -137,7 +137,7 @@ impl OsString {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[must_use]
     #[inline]
-    #[rustc_const_stable(feature = "const_pathbuf_osstring_new", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_pathbuf_osstring_new", since = "1.91.0")]
     pub const fn new() -> OsString {
         OsString { inner: Buf::from_string(String::new()) }
     }
diff --git a/library/std/src/os/windows/ffi.rs b/library/std/src/os/windows/ffi.rs
index 345d5b74285..20e5383dc09 100644
--- a/library/std/src/os/windows/ffi.rs
+++ b/library/std/src/os/windows/ffi.rs
@@ -141,7 +141,7 @@ impl OsStrExt for OsStr {
 pub struct EncodeWide<'a> {
     inner: alloc::wtf8::EncodeWide<'a>,
 }
-#[stable(feature = "encode_wide_debug", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "encode_wide_debug", since = "1.91.0")]
 impl fmt::Debug for EncodeWide<'_> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Debug::fmt(&self.inner, f)
diff --git a/library/std/src/panic.rs b/library/std/src/panic.rs
index 5e8d2f8e78e..1997785885d 100644
--- a/library/std/src/panic.rs
+++ b/library/std/src/panic.rs
@@ -122,7 +122,7 @@ impl<'a> PanicHookInfo<'a> {
     /// ```
     #[must_use]
     #[inline]
-    #[stable(feature = "panic_payload_as_str", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "panic_payload_as_str", since = "1.91.0")]
     pub fn payload_as_str(&self) -> Option<&str> {
         if let Some(s) = self.payload.downcast_ref::<&str>() {
             Some(s)
diff --git a/library/std/src/path.rs b/library/std/src/path.rs
index 88d8a4f21ca..718c7c2e3b1 100644
--- a/library/std/src/path.rs
+++ b/library/std/src/path.rs
@@ -1191,7 +1191,7 @@ impl PathBuf {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[must_use]
     #[inline]
-    #[rustc_const_stable(feature = "const_pathbuf_osstring_new", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_pathbuf_osstring_new", since = "1.91.0")]
     pub const fn new() -> PathBuf {
         PathBuf { inner: OsString::new() }
     }
@@ -1594,7 +1594,7 @@ impl PathBuf {
     /// p.add_extension("");
     /// assert_eq!(Path::new("/feel/the.formatted.dark"), p.as_path());
     /// ```
-    #[stable(feature = "path_add_extension", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "path_add_extension", since = "1.91.0")]
     pub fn add_extension<S: AsRef<OsStr>>(&mut self, extension: S) -> bool {
         self._add_extension(extension.as_ref())
     }
@@ -2103,7 +2103,7 @@ impl PartialEq for PathBuf {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<str> for PathBuf {
     #[inline]
     fn eq(&self, other: &str) -> bool {
@@ -2111,7 +2111,7 @@ impl cmp::PartialEq<str> for PathBuf {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<PathBuf> for str {
     #[inline]
     fn eq(&self, other: &PathBuf) -> bool {
@@ -2119,7 +2119,7 @@ impl cmp::PartialEq<PathBuf> for str {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<String> for PathBuf {
     #[inline]
     fn eq(&self, other: &String) -> bool {
@@ -2127,7 +2127,7 @@ impl cmp::PartialEq<String> for PathBuf {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<PathBuf> for String {
     #[inline]
     fn eq(&self, other: &PathBuf) -> bool {
@@ -2724,7 +2724,7 @@ impl Path {
     ///
     /// [`Path::file_stem`]: Path::file_stem
     ///
-    #[stable(feature = "path_file_prefix", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "path_file_prefix", since = "1.91.0")]
     #[must_use]
     pub fn file_prefix(&self) -> Option<&OsStr> {
         self.file_name().map(split_file_at_dot).and_then(|(before, _after)| Some(before))
@@ -2888,7 +2888,7 @@ impl Path {
     /// assert_eq!(path.with_added_extension("xz"), PathBuf::from("foo.tar.gz.xz"));
     /// assert_eq!(path.with_added_extension("").with_added_extension("txt"), PathBuf::from("foo.tar.gz.txt"));
     /// ```
-    #[stable(feature = "path_add_extension", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "path_add_extension", since = "1.91.0")]
     pub fn with_added_extension<S: AsRef<OsStr>>(&self, extension: S) -> PathBuf {
         let mut new_path = self.to_path_buf();
         new_path.add_extension(extension);
@@ -3405,7 +3405,7 @@ impl PartialEq for Path {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<str> for Path {
     #[inline]
     fn eq(&self, other: &str) -> bool {
@@ -3414,7 +3414,7 @@ impl cmp::PartialEq<str> for Path {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<Path> for str {
     #[inline]
     fn eq(&self, other: &Path) -> bool {
@@ -3422,7 +3422,7 @@ impl cmp::PartialEq<Path> for str {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<String> for Path {
     #[inline]
     fn eq(&self, other: &String) -> bool {
@@ -3430,7 +3430,7 @@ impl cmp::PartialEq<String> for Path {
     }
 }
 
-#[stable(feature = "eq_str_for_path", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "eq_str_for_path", since = "1.91.0")]
 impl cmp::PartialEq<Path> for String {
     #[inline]
     fn eq(&self, other: &Path) -> bool {
diff --git a/library/std/src/sys/pal/unix/stack_overflow.rs b/library/std/src/sys/pal/unix/stack_overflow.rs
index 0d2100d66bc..51463eef5b7 100644
--- a/library/std/src/sys/pal/unix/stack_overflow.rs
+++ b/library/std/src/sys/pal/unix/stack_overflow.rs
@@ -72,7 +72,7 @@ mod imp {
     use crate::sync::OnceLock;
     use crate::sync::atomic::{Atomic, AtomicBool, AtomicPtr, AtomicUsize, Ordering};
     use crate::sys::pal::unix::os;
-    use crate::{io, mem, panic, ptr};
+    use crate::{io, mem, ptr};
 
     // Signal handler for the SIGSEGV and SIGBUS handlers. We've got guard pages
     // (unmapped pages) at the end of every thread's stack, so if a thread ends
diff --git a/library/std/src/sys/stdio/vexos.rs b/library/std/src/sys/stdio/vexos.rs
index 1f2251c6421..9a391feb7a8 100644
--- a/library/std/src/sys/stdio/vexos.rs
+++ b/library/std/src/sys/stdio/vexos.rs
@@ -13,7 +13,7 @@ impl Stdin {
 }
 
 impl io::Read for Stdin {
-    fn read(&mut self, mut buf: &mut [u8]) -> io::Result<usize> {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
         let mut count = 0;
 
         for out_byte in buf.iter_mut() {
diff --git a/src/bootstrap/src/core/build_steps/clippy.rs b/src/bootstrap/src/core/build_steps/clippy.rs
index 2083c675e1f..d5b15d79086 100644
--- a/src/bootstrap/src/core/build_steps/clippy.rs
+++ b/src/bootstrap/src/core/build_steps/clippy.rs
@@ -564,6 +564,7 @@ impl Step for CI {
                 "clippy::same_item_push".into(),
                 "clippy::single_char_add_str".into(),
                 "clippy::to_string_in_format_args".into(),
+                "clippy::unconditional_recursion".into(),
             ],
             forbid: vec![],
         };
@@ -591,6 +592,7 @@ impl Step for CI {
                 "clippy::same_item_push".into(),
                 "clippy::single_char_add_str".into(),
                 "clippy::to_string_in_format_args".into(),
+                "clippy::unconditional_recursion".into(),
             ],
             forbid: vec![],
         };
diff --git a/src/bootstrap/src/core/build_steps/compile.rs b/src/bootstrap/src/core/build_steps/compile.rs
index 14104d7d1d7..884b5750974 100644
--- a/src/bootstrap/src/core/build_steps/compile.rs
+++ b/src/bootstrap/src/core/build_steps/compile.rs
@@ -895,6 +895,8 @@ impl Step for StartupObjects {
     fn run(self, builder: &Builder<'_>) -> Vec<(PathBuf, DependencyType)> {
         let for_compiler = self.compiler;
         let target = self.target;
+        // Even though no longer necessary on x86_64, they are kept for now to
+        // avoid potential issues in downstream crates.
         if !target.is_windows_gnu() {
             return vec![];
         }
@@ -1832,8 +1834,9 @@ impl Step for Sysroot {
         let sysroot = sysroot_dir(compiler.stage);
         trace!(stage = ?compiler.stage, ?sysroot);
 
-        builder
-            .verbose(|| println!("Removing sysroot {} to avoid caching bugs", sysroot.display()));
+        builder.do_if_verbose(|| {
+            println!("Removing sysroot {} to avoid caching bugs", sysroot.display())
+        });
         let _ = fs::remove_dir_all(&sysroot);
         t!(fs::create_dir_all(&sysroot));
 
@@ -1902,12 +1905,7 @@ impl Step for Sysroot {
                 if !path.parent().is_none_or(|p| p.ends_with(&suffix)) {
                     return true;
                 }
-                if !filtered_files.iter().all(|f| f != path.file_name().unwrap()) {
-                    builder.verbose_than(1, || println!("ignoring {}", path.display()));
-                    false
-                } else {
-                    true
-                }
+                filtered_files.iter().all(|f| f != path.file_name().unwrap())
             });
         }
 
@@ -2596,7 +2594,7 @@ pub fn stream_cargo(
         cmd.arg(arg);
     }
 
-    builder.verbose(|| println!("running: {cmd:?}"));
+    builder.do_if_verbose(|| println!("running: {cmd:?}"));
 
     let streaming_command = cmd.stream_capture_stdout(&builder.config.exec_ctx);
 
diff --git a/src/bootstrap/src/core/build_steps/dist.rs b/src/bootstrap/src/core/build_steps/dist.rs
index 99a1062109a..b79d2cb413d 100644
--- a/src/bootstrap/src/core/build_steps/dist.rs
+++ b/src/bootstrap/src/core/build_steps/dist.rs
@@ -2304,7 +2304,7 @@ fn maybe_install_llvm(
         let mut cmd = command(host_llvm_config);
         cmd.cached();
         cmd.arg("--libfiles");
-        builder.verbose(|| println!("running {cmd:?}"));
+        builder.do_if_verbose(|| println!("running {cmd:?}"));
         let files = cmd.run_capture_stdout(builder).stdout();
         let build_llvm_out = &builder.llvm_out(builder.config.host_target);
         let target_llvm_out = &builder.llvm_out(target);
diff --git a/src/bootstrap/src/core/build_steps/gcc.rs b/src/bootstrap/src/core/build_steps/gcc.rs
index 717dea37e9e..17ab8c4e2f4 100644
--- a/src/bootstrap/src/core/build_steps/gcc.rs
+++ b/src/bootstrap/src/core/build_steps/gcc.rs
@@ -128,7 +128,7 @@ fn try_download_gcc(builder: &Builder<'_>, target: TargetSelection) -> Option<Pa
         &builder.config,
         builder.config.rust_info.is_managed_git_subrepository(),
     );
-    builder.verbose(|| {
+    builder.do_if_verbose(|| {
         eprintln!("GCC freshness: {source:?}");
     });
     match source {
diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index e7f5879b5f5..ca2731819e7 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -582,11 +582,11 @@ impl Miri {
         // We re-use the `cargo` from above.
         cargo.arg("--print-sysroot");
 
-        builder.verbose(|| println!("running: {cargo:?}"));
+        builder.do_if_verbose(|| println!("running: {cargo:?}"));
         let stdout = cargo.run_capture_stdout(builder).stdout();
         // Output is "<sysroot>\n".
         let sysroot = stdout.trim_end();
-        builder.verbose(|| println!("`cargo miri setup --print-sysroot` said: {sysroot:?}"));
+        builder.do_if_verbose(|| println!("`cargo miri setup --print-sysroot` said: {sysroot:?}"));
         PathBuf::from(sysroot)
     }
 }
@@ -2675,7 +2675,7 @@ fn markdown_test(builder: &Builder<'_>, compiler: Compiler, markdown: &Path) ->
         return true;
     }
 
-    builder.verbose(|| println!("doc tests for: {}", markdown.display()));
+    builder.do_if_verbose(|| println!("doc tests for: {}", markdown.display()));
     let mut cmd = builder.rustdoc_cmd(compiler);
     builder.add_rust_test_threads(&mut cmd);
     // allow for unstable options such as new editions
diff --git a/src/bootstrap/src/core/builder/cargo.rs b/src/bootstrap/src/core/builder/cargo.rs
index ee2bb710674..9fc4ce669c2 100644
--- a/src/bootstrap/src/core/builder/cargo.rs
+++ b/src/bootstrap/src/core/builder/cargo.rs
@@ -1139,7 +1139,7 @@ impl Builder<'_> {
             cargo.env("RUSTC_BACKTRACE_ON_ICE", "1");
         }
 
-        if self.is_verbose_than(1) {
+        if self.verbosity >= 2 {
             // This provides very useful logs especially when debugging build cache-related stuff.
             cargo.env("CARGO_LOG", "cargo::core::compiler::fingerprint=info");
         }
diff --git a/src/bootstrap/src/core/builder/mod.rs b/src/bootstrap/src/core/builder/mod.rs
index 8226b4325b6..049d2647bec 100644
--- a/src/bootstrap/src/core/builder/mod.rs
+++ b/src/bootstrap/src/core/builder/mod.rs
@@ -545,7 +545,7 @@ impl StepDescription {
         if !builder.config.skip.is_empty()
             && !matches!(builder.config.get_dry_run(), DryRun::SelfCheck)
         {
-            builder.verbose(|| {
+            builder.do_if_verbose(|| {
                 println!(
                     "{:?} not skipped for {:?} -- not in {:?}",
                     pathset, self.name, builder.config.skip
@@ -947,7 +947,7 @@ impl Step for Libdir {
             // Sysroot`).
             if !builder.download_rustc() {
                 let sysroot_target_libdir = sysroot.join(self.target).join("lib");
-                builder.verbose(|| {
+                builder.do_if_verbose(|| {
                     eprintln!(
                         "Removing sysroot {} to avoid caching bugs",
                         sysroot_target_libdir.display()
diff --git a/src/bootstrap/src/core/builder/tests.rs b/src/bootstrap/src/core/builder/tests.rs
index 229adf71459..4555f0d2091 100644
--- a/src/bootstrap/src/core/builder/tests.rs
+++ b/src/bootstrap/src/core/builder/tests.rs
@@ -22,13 +22,7 @@ fn configure(cmd: &str, host: &[&str], target: &[&str]) -> Config {
 }
 
 fn configure_with_args(cmd: &[&str], host: &[&str], target: &[&str]) -> Config {
-    TestCtx::new()
-        .config(cmd[0])
-        .args(&cmd[1..])
-        .hosts(host)
-        .targets(target)
-        .args(&["--build", TEST_TRIPLE_1])
-        .create_config()
+    TestCtx::new().config(cmd[0]).args(&cmd[1..]).hosts(host).targets(target).create_config()
 }
 
 fn first<A, B>(v: Vec<(A, B)>) -> Vec<A> {
@@ -218,18 +212,17 @@ fn prepare_rustc_checkout(ctx: &mut GitCtx) {
 
 /// Parses a Config directory from `path`, with the given value of `download_rustc`.
 fn parse_config_download_rustc_at(path: &Path, download_rustc: &str, ci: bool) -> Config {
-    Config::parse_inner(
-        Flags::parse(&[
-            "build".to_owned(),
-            "--dry-run".to_owned(),
-            "--ci".to_owned(),
-            if ci { "true" } else { "false" }.to_owned(),
-            format!("--set=rust.download-rustc='{download_rustc}'"),
-            "--src".to_owned(),
-            path.to_str().unwrap().to_owned(),
-        ]),
-        |&_| Ok(Default::default()),
-    )
+    TestCtx::new()
+        .config("build")
+        .args(&[
+            "--ci",
+            if ci { "true" } else { "false" },
+            format!("--set=rust.download-rustc='{download_rustc}'").as_str(),
+            "--src",
+            path.to_str().unwrap(),
+        ])
+        .no_override_download_ci_llvm()
+        .create_config()
 }
 
 mod dist {
@@ -237,6 +230,7 @@ mod dist {
 
     use super::{Config, TEST_TRIPLE_1, TEST_TRIPLE_2, TEST_TRIPLE_3, first, run_build};
     use crate::Flags;
+    use crate::core::builder::tests::host_target;
     use crate::core::builder::*;
 
     fn configure(host: &[&str], target: &[&str]) -> Config {
@@ -245,11 +239,11 @@ mod dist {
 
     #[test]
     fn llvm_out_behaviour() {
-        let mut config = configure(&[TEST_TRIPLE_1], &[TEST_TRIPLE_2]);
+        let mut config = configure(&[], &[TEST_TRIPLE_2]);
         config.llvm_from_ci = true;
         let build = Build::new(config.clone());
 
-        let target = TargetSelection::from_user(TEST_TRIPLE_1);
+        let target = TargetSelection::from_user(&host_target());
         assert!(build.llvm_out(target).ends_with("ci-llvm"));
         let target = TargetSelection::from_user(TEST_TRIPLE_2);
         assert!(build.llvm_out(target).ends_with("llvm"));
@@ -314,7 +308,7 @@ mod sysroot_target_dirs {
 /// cg_gcc tests instead.
 #[test]
 fn test_test_compiler() {
-    let config = configure_with_args(&["test", "compiler"], &[TEST_TRIPLE_1], &[TEST_TRIPLE_1]);
+    let config = configure_with_args(&["test", "compiler"], &[&host_target()], &[TEST_TRIPLE_1]);
     let cache = run_build(&config.paths.clone(), config);
 
     let compiler = cache.contains::<test::CrateLibrustc>();
@@ -347,7 +341,7 @@ fn test_test_coverage() {
         // Print each test case so that if one fails, the most recently printed
         // case is the one that failed.
         println!("Testing case: {cmd:?}");
-        let config = configure_with_args(cmd, &[TEST_TRIPLE_1], &[TEST_TRIPLE_1]);
+        let config = configure_with_args(cmd, &[], &[TEST_TRIPLE_1]);
         let mut cache = run_build(&config.paths.clone(), config);
 
         let modes =
@@ -359,14 +353,7 @@ fn test_test_coverage() {
 #[test]
 fn test_prebuilt_llvm_config_path_resolution() {
     fn configure(config: &str) -> Config {
-        Config::parse_inner(
-            Flags::parse(&[
-                "build".to_string(),
-                "--dry-run".to_string(),
-                "--config=/does/not/exist".to_string(),
-            ]),
-            |&_| toml::from_str(&config),
-        )
+        TestCtx::new().config("build").with_default_toml_config(config).create_config()
     }
 
     // Removes Windows disk prefix if present
diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index dd2d5a1fd53..6d9e3b54156 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -414,14 +414,28 @@ impl Config {
         // Set config values based on flags.
         let mut exec_ctx = ExecutionContext::new(flags_verbose, flags_cmd.fail_fast());
         exec_ctx.set_dry_run(if flags_dry_run { DryRun::UserSelected } else { DryRun::Disabled });
-        let mut src = {
+
+        let default_src_dir = {
             let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
             // Undo `src/bootstrap`
             manifest_dir.parent().unwrap().parent().unwrap().to_owned()
         };
+        let src = if let Some(s) = compute_src_directory(flags_src, &exec_ctx) {
+            s
+        } else {
+            default_src_dir.clone()
+        };
 
-        if let Some(src_) = compute_src_directory(flags_src, &exec_ctx) {
-            src = src_;
+        #[cfg(test)]
+        {
+            if let Some(config_path) = flags_config.as_ref() {
+                assert!(
+                    !config_path.starts_with(&src),
+                    "Path {config_path:?} should not be inside or equal to src dir {src:?}"
+                );
+            } else {
+                panic!("During test the config should be explicitly added");
+            }
         }
 
         // Now load the TOML config, as soon as possible
@@ -630,19 +644,13 @@ impl Config {
         let llvm_assertions = llvm_assertions.unwrap_or(false);
         let mut target_config = HashMap::new();
         let mut channel = "dev".to_string();
-        let out = flags_build_dir.or(build_build_dir.map(PathBuf::from)).unwrap_or_else(|| {
-            if cfg!(test) {
-                // Use the build directory of the original x.py invocation, so that we can set `initial_rustc` properly.
-                Path::new(
-                    &env::var_os("CARGO_TARGET_DIR").expect("cargo test directly is not supported"),
-                )
-                .parent()
-                .unwrap()
-                .to_path_buf()
-            } else {
-                PathBuf::from("build")
-            }
-        });
+
+        let out = flags_build_dir.or_else(|| build_build_dir.map(PathBuf::from));
+        let out = if cfg!(test) {
+            out.expect("--build-dir has to be specified in tests")
+        } else {
+            out.unwrap_or_else(|| PathBuf::from("build"))
+        };
 
         // NOTE: Bootstrap spawns various commands with different working directories.
         // To avoid writing to random places on the file system, `config.out` needs to be an absolute path.
@@ -653,6 +661,10 @@ impl Config {
             out
         };
 
+        let default_stage0_rustc_path = |dir: &Path| {
+            dir.join(host_target).join("stage0").join("bin").join(exe("rustc", host_target))
+        };
+
         if cfg!(test) {
             // When configuring bootstrap for tests, make sure to set the rustc and Cargo to the
             // same ones used to call the tests (if custom ones are not defined in the toml). If we
@@ -661,6 +673,22 @@ impl Config {
             // Cargo in their bootstrap.toml.
             build_rustc = build_rustc.take().or(std::env::var_os("RUSTC").map(|p| p.into()));
             build_cargo = build_cargo.take().or(std::env::var_os("CARGO").map(|p| p.into()));
+
+            // If we are running only `cargo test` (and not `x test bootstrap`), which is useful
+            // e.g. for debugging bootstrap itself, then we won't have RUSTC and CARGO set to the
+            // proper paths.
+            // We thus "guess" that the build directory is located at <src>/build, and try to load
+            // rustc and cargo from there
+            let is_test_outside_x = std::env::var("CARGO_TARGET_DIR").is_err();
+            if is_test_outside_x && build_rustc.is_none() {
+                let stage0_rustc = default_stage0_rustc_path(&default_src_dir.join("build"));
+                assert!(
+                    stage0_rustc.exists(),
+                    "Trying to run cargo test without having a stage0 rustc available in {}",
+                    stage0_rustc.display()
+                );
+                build_rustc = Some(stage0_rustc);
+            }
         }
 
         if !flags_skip_stage0_validation {
@@ -694,7 +722,7 @@ impl Config {
 
         let initial_rustc = build_rustc.unwrap_or_else(|| {
             download_beta_toolchain(&dwn_ctx, &out);
-            out.join(host_target).join("stage0").join("bin").join(exe("rustc", host_target))
+            default_stage0_rustc_path(&out)
         });
 
         let initial_sysroot = t!(PathBuf::from_str(
@@ -1534,11 +1562,11 @@ impl Config {
                                 println!("WARNING: CI rustc has some fields that are no longer supported in bootstrap; download-rustc will be disabled.");
                                 println!("HELP: Consider rebasing to a newer commit if available.");
                                 return None;
-                            },
+                            }
                             Err(e) => {
                                 eprintln!("ERROR: Failed to parse CI rustc bootstrap.toml: {e}");
                                 exit!(2);
-                            },
+                            }
                         };
 
                         let current_config_toml = Self::get_toml(config_path).unwrap();
@@ -1571,8 +1599,8 @@ impl Config {
     }
 
     /// Runs a function if verbosity is greater than 0
-    pub fn verbose(&self, f: impl Fn()) {
-        self.exec_ctx.verbose(f);
+    pub fn do_if_verbose(&self, f: impl Fn()) {
+        self.exec_ctx.do_if_verbose(f);
     }
 
     pub fn any_sanitizers_to_build(&self) -> bool {
@@ -2061,7 +2089,7 @@ pub fn download_ci_rustc_commit<'a>(
         // Look for a version to compare to based on the current commit.
         // Only commits merged by bors will have CI artifacts.
         let freshness = check_path_modifications_(dwn_ctx, RUSTC_IF_UNCHANGED_ALLOWED_PATHS);
-        dwn_ctx.exec_ctx.verbose(|| {
+        dwn_ctx.exec_ctx.do_if_verbose(|| {
             eprintln!("rustc freshness: {freshness:?}");
         });
         match freshness {
diff --git a/src/bootstrap/src/core/config/tests.rs b/src/bootstrap/src/core/config/tests.rs
index e93525fbd09..4f2df76a156 100644
--- a/src/bootstrap/src/core/config/tests.rs
+++ b/src/bootstrap/src/core/config/tests.rs
@@ -14,17 +14,15 @@ use super::toml::change_id::ChangeIdWrapper;
 use super::{Config, RUSTC_IF_UNCHANGED_ALLOWED_PATHS};
 use crate::ChangeId;
 use crate::core::build_steps::clippy::{LintConfig, get_clippy_rules_in_order};
-use crate::core::build_steps::llvm;
 use crate::core::build_steps::llvm::LLVM_INVALIDATION_PATHS;
+use crate::core::build_steps::{llvm, test};
 use crate::core::config::toml::TomlConfig;
 use crate::core::config::{CompilerBuiltins, LldMode, StringOrBool, Target, TargetSelection};
+use crate::utils::tests::TestCtx;
 use crate::utils::tests::git::git_test;
 
 pub(crate) fn parse(config: &str) -> Config {
-    Config::parse_inner(
-        Flags::parse(&["check".to_string(), "--config=/does/not/exist".to_string()]),
-        |&_| toml::from_str(&config),
-    )
+    TestCtx::new().config("check").with_default_toml_config(config).create_config()
 }
 
 fn get_toml(file: &Path) -> Result<TomlConfig, toml::de::Error> {
@@ -32,28 +30,16 @@ fn get_toml(file: &Path) -> Result<TomlConfig, toml::de::Error> {
     toml::from_str(&contents).and_then(|table: toml::Value| TomlConfig::deserialize(table))
 }
 
-/// Helps with debugging by using consistent test-specific directories instead of
-/// random temporary directories.
-fn prepare_test_specific_dir() -> PathBuf {
-    let current = std::thread::current();
-    // Replace "::" with "_" to make it safe for directory names on Windows systems
-    let test_path = current.name().unwrap().replace("::", "_");
-
-    let testdir = parse("").tempdir().join(test_path);
-
-    // clean up any old test files
-    let _ = fs::remove_dir_all(&testdir);
-    let _ = fs::create_dir_all(&testdir);
-
-    testdir
-}
-
 #[test]
 fn download_ci_llvm() {
-    let config = parse("llvm.download-ci-llvm = false");
+    let config = TestCtx::new().config("check").create_config();
     assert!(!config.llvm_from_ci);
 
-    let if_unchanged_config = parse("llvm.download-ci-llvm = \"if-unchanged\"");
+    // this doesn't make sense, as we are overriding it later.
+    let if_unchanged_config = TestCtx::new()
+        .config("check")
+        .with_default_toml_config("llvm.download-ci-llvm = \"if-unchanged\"")
+        .create_config();
     if if_unchanged_config.llvm_from_ci && if_unchanged_config.is_running_on_ci {
         let has_changes = if_unchanged_config.has_changes_from_upstream(LLVM_INVALIDATION_PATHS);
 
@@ -64,62 +50,6 @@ fn download_ci_llvm() {
     }
 }
 
-// FIXME(onur-ozkan): extend scope of the test
-// refs:
-//   - https://github.com/rust-lang/rust/issues/109120
-//   - https://github.com/rust-lang/rust/pull/109162#issuecomment-1496782487
-#[test]
-fn detect_src_and_out() {
-    fn test(cfg: Config, build_dir: Option<&str>) {
-        // This will bring absolute form of `src/bootstrap` path
-        let current_dir = std::env::current_dir().unwrap();
-
-        // get `src` by moving into project root path
-        let expected_src = current_dir.ancestors().nth(2).unwrap();
-        assert_eq!(&cfg.src, expected_src);
-
-        // Sanity check for `src`
-        let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
-        let expected_src = manifest_dir.ancestors().nth(2).unwrap();
-        assert_eq!(&cfg.src, expected_src);
-
-        // test if build-dir was manually given in bootstrap.toml
-        if let Some(custom_build_dir) = build_dir {
-            assert_eq!(&cfg.out, Path::new(custom_build_dir));
-        }
-        // test the native bootstrap way
-        else {
-            // This should bring output path of bootstrap in absolute form
-            let cargo_target_dir = env::var_os("CARGO_TARGET_DIR").expect(
-                "CARGO_TARGET_DIR must been provided for the test environment from bootstrap",
-            );
-
-            // Move to `build` from `build/bootstrap`
-            let expected_out = Path::new(&cargo_target_dir).parent().unwrap();
-            assert_eq!(&cfg.out, expected_out);
-
-            let args: Vec<String> = env::args().collect();
-
-            // Another test for `out` as a sanity check
-            //
-            // This will bring something similar to:
-            //     `{build-dir}/bootstrap/debug/deps/bootstrap-c7ee91d5661e2804`
-            // `{build-dir}` can be anywhere, not just in the rust project directory.
-            let dep = Path::new(args.first().unwrap());
-            let expected_out = dep.ancestors().nth(5).unwrap();
-
-            assert_eq!(&cfg.out, expected_out);
-        }
-    }
-
-    test(parse(""), None);
-
-    {
-        let build_dir = if cfg!(windows) { "C:\\tmp" } else { "/tmp" };
-        test(parse(&format!("build.build-dir = '{build_dir}'")), Some(build_dir));
-    }
-}
-
 #[test]
 fn clap_verify() {
     Flags::command().debug_assert();
@@ -127,54 +57,54 @@ fn clap_verify() {
 
 #[test]
 fn override_toml() {
-    let config = Config::parse_inner(
-        Flags::parse(&[
-            "check".to_owned(),
-            "--config=/does/not/exist".to_owned(),
-            "--set=change-id=1".to_owned(),
-            "--set=rust.lto=fat".to_owned(),
-            "--set=rust.deny-warnings=false".to_owned(),
-            "--set=build.optimized-compiler-builtins=true".to_owned(),
-            "--set=build.gdb=\"bar\"".to_owned(),
-            "--set=build.tools=[\"cargo\"]".to_owned(),
-            "--set=llvm.build-config={\"foo\" = \"bar\"}".to_owned(),
-            "--set=target.x86_64-unknown-linux-gnu.runner=bar".to_owned(),
-            "--set=target.x86_64-unknown-linux-gnu.rpath=false".to_owned(),
-            "--set=target.aarch64-unknown-linux-gnu.sanitizers=false".to_owned(),
-            "--set=target.aarch64-apple-darwin.runner=apple".to_owned(),
-            "--set=target.aarch64-apple-darwin.optimized-compiler-builtins=false".to_owned(),
-        ]),
-        |&_| {
-            toml::from_str(
-                r#"
-change-id = 0
-[rust]
-lto = "off"
-deny-warnings = true
-download-rustc=false
-
-[build]
-gdb = "foo"
-tools = []
-
-[llvm]
-download-ci-llvm = false
-build-config = {}
-
-[target.aarch64-unknown-linux-gnu]
-sanitizers = true
-rpath = true
-runner = "aarch64-runner"
-
-[target.x86_64-unknown-linux-gnu]
-sanitizers = true
-rpath = true
-runner = "x86_64-runner"
-
-                "#,
-            )
-        },
-    );
+    let config_toml: &str = r#"
+    change-id = 0
+
+    [rust]
+    lto = "off"
+    deny-warnings = true
+    download-rustc = false
+
+    [build]
+    gdb = "foo"
+    tools = []
+
+    [llvm]
+    download-ci-llvm = false
+    build-config = {}
+
+    [target.aarch64-unknown-linux-gnu]
+    sanitizers = true
+    rpath = true
+    runner = "aarch64-runner"
+
+    [target.x86_64-unknown-linux-gnu]
+    sanitizers = true
+    rpath = true
+    runner = "x86_64-runner"
+    "#;
+
+    let args = [
+        "--set=change-id=1",
+        "--set=rust.lto=fat",
+        "--set=rust.deny-warnings=false",
+        "--set=build.optimized-compiler-builtins=true",
+        "--set=build.gdb=\"bar\"",
+        "--set=build.tools=[\"cargo\"]",
+        "--set=llvm.build-config={\"foo\" = \"bar\"}",
+        "--set=target.x86_64-unknown-linux-gnu.runner=bar",
+        "--set=target.x86_64-unknown-linux-gnu.rpath=false",
+        "--set=target.aarch64-unknown-linux-gnu.sanitizers=false",
+        "--set=target.aarch64-apple-darwin.runner=apple",
+        "--set=target.aarch64-apple-darwin.optimized-compiler-builtins=false",
+    ];
+
+    let config = TestCtx::new()
+        .config("check")
+        .with_default_toml_config(config_toml)
+        .args(&args)
+        .create_config();
+
     assert_eq!(config.change_id, Some(ChangeId::Id(1)), "setting top-level value");
     assert_eq!(
         config.rust_lto,
@@ -233,33 +163,26 @@ runner = "x86_64-runner"
 #[test]
 #[should_panic]
 fn override_toml_duplicate() {
-    Config::parse_inner(
-        Flags::parse(&[
-            "check".to_owned(),
-            "--config=/does/not/exist".to_string(),
-            "--set=change-id=1".to_owned(),
-            "--set=change-id=2".to_owned(),
-        ]),
-        |&_| toml::from_str("change-id = 0"),
-    );
+    TestCtx::new()
+        .config("check")
+        .with_default_toml_config("change-id = 0")
+        .arg("--set")
+        .arg("change-id=1")
+        .arg("--set")
+        .arg("change-id=2")
+        .create_config();
 }
 
 #[test]
 fn profile_user_dist() {
-    fn get_toml(file: &Path) -> Result<TomlConfig, toml::de::Error> {
-        let contents = if file.ends_with("bootstrap.toml")
-            || file.ends_with("config.toml")
-            || env::var_os("RUST_BOOTSTRAP_CONFIG").is_some()
-        {
-            "profile = \"user\"".to_owned()
-        } else {
-            assert!(file.ends_with("config.dist.toml") || file.ends_with("bootstrap.dist.toml"));
-            std::fs::read_to_string(file).unwrap()
-        };
-
-        toml::from_str(&contents).and_then(|table: toml::Value| TomlConfig::deserialize(table))
-    }
-    Config::parse_inner(Flags::parse(&["check".to_owned()]), get_toml);
+    TestCtx::new()
+        .config("check")
+        .with_default_toml_config(
+            r#"
+        profile = "user"
+    "#,
+        )
+        .create_config();
 }
 
 #[test]
@@ -277,12 +200,15 @@ fn rust_optimize() {
 #[test]
 #[should_panic]
 fn invalid_rust_optimize() {
-    parse("rust.optimize = \"a\"");
+    TestCtx::new()
+        .config("check")
+        .with_default_toml_config("rust.optimize = \"a\"")
+        .create_config();
 }
 
 #[test]
 fn verify_file_integrity() {
-    let config = parse("");
+    let config = TestCtx::new().config("check").no_dry_run().create_config();
 
     let tempfile = config.tempdir().join(".tmp-test-file");
     File::create(&tempfile).unwrap().write_all(b"dummy value").unwrap();
@@ -292,8 +218,6 @@ fn verify_file_integrity() {
         config
             .verify(&tempfile, "7e255dd9542648a8779268a0f268b891a198e9828e860ed23f826440e786eae5")
     );
-
-    remove_file(tempfile).unwrap();
 }
 
 #[test]
@@ -324,22 +248,23 @@ fn parse_change_id_with_unknown_field() {
 
 #[test]
 fn order_of_clippy_rules() {
-    let args = vec![
-        "clippy".to_string(),
-        "--fix".to_string(),
-        "--allow-dirty".to_string(),
-        "--allow-staged".to_string(),
-        "-Aclippy:all".to_string(),
-        "-Wclippy::style".to_string(),
-        "-Aclippy::foo1".to_string(),
-        "-Aclippy::foo2".to_string(),
+    let args = [
+        "clippy",
+        "--fix",
+        "--allow-dirty",
+        "--allow-staged",
+        "-Aclippy:all",
+        "-Wclippy::style",
+        "-Aclippy::foo1",
+        "-Aclippy::foo2",
     ];
-    let config = Config::parse(Flags::parse(&args));
+    let config = TestCtx::new().config(&args[0]).args(&args[1..]).create_config();
 
     let actual = match config.cmd.clone() {
         crate::Subcommand::Clippy { allow, deny, warn, forbid, .. } => {
             let cfg = LintConfig { allow, deny, warn, forbid };
-            get_clippy_rules_in_order(&args, &cfg)
+            let args_vec: Vec<String> = args.iter().map(|s| s.to_string()).collect();
+            get_clippy_rules_in_order(&args_vec, &cfg)
         }
         _ => panic!("invalid subcommand"),
     };
@@ -356,14 +281,14 @@ fn order_of_clippy_rules() {
 
 #[test]
 fn clippy_rule_separate_prefix() {
-    let args =
-        vec!["clippy".to_string(), "-A clippy:all".to_string(), "-W clippy::style".to_string()];
-    let config = Config::parse(Flags::parse(&args));
+    let args = ["clippy", "-A clippy:all", "-W clippy::style"];
+    let config = TestCtx::new().config(&args[0]).args(&args[1..]).create_config();
 
     let actual = match config.cmd.clone() {
         crate::Subcommand::Clippy { allow, deny, warn, forbid, .. } => {
             let cfg = LintConfig { allow, deny, warn, forbid };
-            get_clippy_rules_in_order(&args, &cfg)
+            let args_vec: Vec<String> = args.iter().map(|s| s.to_string()).collect();
+            get_clippy_rules_in_order(&args_vec, &cfg)
         }
         _ => panic!("invalid subcommand"),
     };
@@ -374,16 +299,20 @@ fn clippy_rule_separate_prefix() {
 
 #[test]
 fn verbose_tests_default_value() {
-    let config = Config::parse(Flags::parse(&["build".into(), "compiler".into()]));
+    let config = TestCtx::new().config("build").args(&["compiler".into()]).create_config();
     assert_eq!(config.verbose_tests, false);
 
-    let config = Config::parse(Flags::parse(&["build".into(), "compiler".into(), "-v".into()]));
+    let config =
+        TestCtx::new().config("build").args(&["compiler".into(), "-v".into()]).create_config();
     assert_eq!(config.verbose_tests, true);
 }
 
 #[test]
 fn parse_rust_std_features() {
-    let config = parse("rust.std-features = [\"panic-unwind\", \"backtrace\"]");
+    let config = TestCtx::new()
+        .config("check")
+        .with_default_toml_config("rust.std-features = [\"panic-unwind\", \"backtrace\"]")
+        .create_config();
     let expected_features: BTreeSet<String> =
         ["panic-unwind", "backtrace"].into_iter().map(|s| s.to_string()).collect();
     assert_eq!(config.rust_std_features, expected_features);
@@ -391,7 +320,10 @@ fn parse_rust_std_features() {
 
 #[test]
 fn parse_rust_std_features_empty() {
-    let config = parse("rust.std-features = []");
+    let config = TestCtx::new()
+        .config("check")
+        .with_default_toml_config("rust.std-features = []")
+        .create_config();
     let expected_features: BTreeSet<String> = BTreeSet::new();
     assert_eq!(config.rust_std_features, expected_features);
 }
@@ -399,70 +331,65 @@ fn parse_rust_std_features_empty() {
 #[test]
 #[should_panic]
 fn parse_rust_std_features_invalid() {
-    parse("rust.std-features = \"backtrace\"");
+    TestCtx::new()
+        .config("check")
+        .with_default_toml_config("rust.std-features = \"backtrace\"")
+        .create_config();
 }
 
 #[test]
 fn parse_jobs() {
-    assert_eq!(parse("build.jobs = 1").jobs, Some(1));
+    assert_eq!(
+        TestCtx::new()
+            .config("check")
+            .with_default_toml_config("build.jobs = 1")
+            .create_config()
+            .jobs,
+        Some(1)
+    );
 }
 
 #[test]
 fn jobs_precedence() {
     // `--jobs` should take precedence over using `--set build.jobs`.
 
-    let config = Config::parse_inner(
-        Flags::parse(&[
-            "check".to_owned(),
-            "--config=/does/not/exist".to_owned(),
-            "--jobs=67890".to_owned(),
-            "--set=build.jobs=12345".to_owned(),
-        ]),
-        |&_| toml::from_str(""),
-    );
+    let config = TestCtx::new()
+        .config("check")
+        .args(&["--jobs=67890", "--set=build.jobs=12345"])
+        .create_config();
     assert_eq!(config.jobs, Some(67890));
 
     // `--set build.jobs` should take precedence over `bootstrap.toml`.
-    let config = Config::parse_inner(
-        Flags::parse(&[
-            "check".to_owned(),
-            "--config=/does/not/exist".to_owned(),
-            "--set=build.jobs=12345".to_owned(),
-        ]),
-        |&_| {
-            toml::from_str(
-                r#"
-            [build]
-            jobs = 67890
-        "#,
-            )
-        },
-    );
+    let config = TestCtx::new()
+        .config("check")
+        .args(&["--set=build.jobs=12345"])
+        .with_default_toml_config(
+            r#"
+        [build]
+        jobs = 67890
+    "#,
+        )
+        .create_config();
+
     assert_eq!(config.jobs, Some(12345));
 
     // `--jobs` > `--set build.jobs` > `bootstrap.toml`
-    let config = Config::parse_inner(
-        Flags::parse(&[
-            "check".to_owned(),
-            "--jobs=123".to_owned(),
-            "--config=/does/not/exist".to_owned(),
-            "--set=build.jobs=456".to_owned(),
-        ]),
-        |&_| {
-            toml::from_str(
-                r#"
-            [build]
-            jobs = 789
-        "#,
-            )
-        },
-    );
+    let config = TestCtx::new()
+        .config("check")
+        .args(&["--jobs=123", "--set=build.jobs=456"])
+        .with_default_toml_config(
+            r#"
+        [build]
+        jobs = 789
+    "#,
+        )
+        .create_config();
     assert_eq!(config.jobs, Some(123));
 }
 
 #[test]
 fn check_rustc_if_unchanged_paths() {
-    let config = parse("");
+    let config = TestCtx::new().config("check").create_config();
     let normalised_allowed_paths: Vec<_> = RUSTC_IF_UNCHANGED_ALLOWED_PATHS
         .iter()
         .map(|t| {
@@ -477,59 +404,42 @@ fn check_rustc_if_unchanged_paths() {
 
 #[test]
 fn test_explicit_stage() {
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), "--config=/does/not/exist".to_owned()]),
-        |&_| {
-            toml::from_str(
-                r#"
+    let config = TestCtx::new()
+        .config("check")
+        .with_default_toml_config(
+            r#"
             [build]
             test-stage = 1
         "#,
-            )
-        },
-    );
+        )
+        .create_config();
 
     assert!(!config.explicit_stage_from_cli);
     assert!(config.explicit_stage_from_config);
     assert!(config.is_explicit_stage());
 
-    let config = Config::parse_inner(
-        Flags::parse(&[
-            "check".to_owned(),
-            "--stage=2".to_owned(),
-            "--config=/does/not/exist".to_owned(),
-        ]),
-        |&_| toml::from_str(""),
-    );
+    let config = TestCtx::new().config("check").stage(2).create_config();
 
     assert!(config.explicit_stage_from_cli);
     assert!(!config.explicit_stage_from_config);
     assert!(config.is_explicit_stage());
 
-    let config = Config::parse_inner(
-        Flags::parse(&[
-            "check".to_owned(),
-            "--stage=2".to_owned(),
-            "--config=/does/not/exist".to_owned(),
-        ]),
-        |&_| {
-            toml::from_str(
-                r#"
+    let config = TestCtx::new()
+        .config("check")
+        .stage(2)
+        .with_default_toml_config(
+            r#"
             [build]
             test-stage = 1
         "#,
-            )
-        },
-    );
+        )
+        .create_config();
 
     assert!(config.explicit_stage_from_cli);
     assert!(config.explicit_stage_from_config);
     assert!(config.is_explicit_stage());
 
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), "--config=/does/not/exist".to_owned()]),
-        |&_| toml::from_str(""),
-    );
+    let config = TestCtx::new().config("check").create_config();
 
     assert!(!config.explicit_stage_from_cli);
     assert!(!config.explicit_stage_from_config);
@@ -539,7 +449,10 @@ fn test_explicit_stage() {
 #[test]
 fn test_exclude() {
     let exclude_path = "compiler";
-    let config = parse(&format!("build.exclude=[\"{}\"]", exclude_path));
+    let config = TestCtx::new()
+        .config("check")
+        .with_default_toml_config(&format!("build.exclude=[\"{}\"]", exclude_path))
+        .create_config();
 
     let first_excluded = config
         .skip
@@ -553,32 +466,20 @@ fn test_exclude() {
 
 #[test]
 fn test_ci_flag() {
-    let config = Config::parse_inner(Flags::parse(&["check".into(), "--ci=false".into()]), |&_| {
-        toml::from_str("")
-    });
+    let config = TestCtx::new().config("check").arg("--ci").arg("false").create_config();
     assert!(!config.is_running_on_ci);
 
-    let config = Config::parse_inner(Flags::parse(&["check".into(), "--ci=true".into()]), |&_| {
-        toml::from_str("")
-    });
+    let config = TestCtx::new().config("check").arg("--ci").arg("true").create_config();
     assert!(config.is_running_on_ci);
 
-    let config = Config::parse_inner(Flags::parse(&["check".into()]), |&_| toml::from_str(""));
+    let config = TestCtx::new().config("check").create_config();
     assert_eq!(config.is_running_on_ci, CiEnv::is_ci());
 }
 
 #[test]
 fn test_precedence_of_includes() {
-    let testdir = prepare_test_specific_dir();
-
-    let root_config = testdir.join("config.toml");
-    let root_config_content = br#"
-        include = ["./extension.toml"]
-
-        [llvm]
-        link-jobs = 2
-    "#;
-    File::create(&root_config).unwrap().write_all(root_config_content).unwrap();
+    let test_ctx = TestCtx::new();
+    let testdir = test_ctx.dir();
 
     let extension = testdir.join("extension.toml");
     let extension_content = br#"
@@ -599,10 +500,17 @@ fn test_precedence_of_includes() {
     "#;
     File::create(extension).unwrap().write_all(extension_content).unwrap();
 
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), format!("--config={}", root_config.to_str().unwrap())]),
-        get_toml,
-    );
+    let config = test_ctx
+        .config("check")
+        .with_default_toml_config(
+            r#"
+        include = ["./extension.toml"]
+
+        [llvm]
+        link-jobs = 2
+    "#,
+        )
+        .create_config();
 
     assert_eq!(config.change_id.unwrap(), ChangeId::Id(543));
     assert_eq!(config.llvm_link_jobs.unwrap(), 2);
@@ -612,36 +520,29 @@ fn test_precedence_of_includes() {
 #[test]
 #[should_panic(expected = "Cyclic inclusion detected")]
 fn test_cyclic_include_direct() {
-    let testdir = prepare_test_specific_dir();
-
-    let root_config = testdir.join("config.toml");
-    let root_config_content = br#"
-        include = ["./extension.toml"]
-    "#;
-    File::create(&root_config).unwrap().write_all(root_config_content).unwrap();
-
+    let test_ctx = TestCtx::new();
+    let testdir = test_ctx.dir();
     let extension = testdir.join("extension.toml");
     let extension_content = br#"
-        include = ["./config.toml"]
+        include = ["./bootstrap.toml"]
     "#;
     File::create(extension).unwrap().write_all(extension_content).unwrap();
 
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), format!("--config={}", root_config.to_str().unwrap())]),
-        get_toml,
-    );
+    test_ctx
+        .config("check")
+        .with_default_toml_config(
+            r#"
+        include = ["./extension.toml"]
+    "#,
+        )
+        .create_config();
 }
 
 #[test]
 #[should_panic(expected = "Cyclic inclusion detected")]
 fn test_cyclic_include_indirect() {
-    let testdir = prepare_test_specific_dir();
-
-    let root_config = testdir.join("config.toml");
-    let root_config_content = br#"
-        include = ["./extension.toml"]
-    "#;
-    File::create(&root_config).unwrap().write_all(root_config_content).unwrap();
+    let test_ctx = TestCtx::new();
+    let testdir = test_ctx.dir();
 
     let extension = testdir.join("extension.toml");
     let extension_content = br#"
@@ -661,43 +562,37 @@ fn test_cyclic_include_indirect() {
     "#;
     File::create(extension).unwrap().write_all(extension_content).unwrap();
 
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), format!("--config={}", root_config.to_str().unwrap())]),
-        get_toml,
-    );
+    test_ctx
+        .config("check")
+        .with_default_toml_config(
+            r#"
+        include = ["./extension.toml"]
+    "#,
+        )
+        .create_config();
 }
 
 #[test]
 fn test_include_absolute_paths() {
-    let testdir = prepare_test_specific_dir();
+    let test_ctx = TestCtx::new();
+    let testdir = test_ctx.dir();
 
     let extension = testdir.join("extension.toml");
     File::create(&extension).unwrap().write_all(&[]).unwrap();
 
-    let root_config = testdir.join("config.toml");
     let extension_absolute_path =
         extension.canonicalize().unwrap().to_str().unwrap().replace('\\', r"\\");
     let root_config_content = format!(r#"include = ["{}"]"#, extension_absolute_path);
-    File::create(&root_config).unwrap().write_all(root_config_content.as_bytes()).unwrap();
-
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), format!("--config={}", root_config.to_str().unwrap())]),
-        get_toml,
-    );
+    test_ctx.config("check").with_default_toml_config(&root_config_content).create_config();
 }
 
 #[test]
 fn test_include_relative_paths() {
-    let testdir = prepare_test_specific_dir();
+    let test_ctx = TestCtx::new();
+    let testdir = test_ctx.dir();
 
     let _ = fs::create_dir_all(&testdir.join("subdir/another_subdir"));
 
-    let root_config = testdir.join("config.toml");
-    let root_config_content = br#"
-        include = ["./subdir/extension.toml"]
-    "#;
-    File::create(&root_config).unwrap().write_all(root_config_content).unwrap();
-
     let extension = testdir.join("subdir/extension.toml");
     let extension_content = br#"
         include = ["../extension2.toml"]
@@ -719,22 +614,20 @@ fn test_include_relative_paths() {
     let extension = testdir.join("extension4.toml");
     File::create(extension).unwrap().write_all(&[]).unwrap();
 
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), format!("--config={}", root_config.to_str().unwrap())]),
-        get_toml,
-    );
+    test_ctx
+        .config("check")
+        .with_default_toml_config(
+            r#"
+        include = ["./subdir/extension.toml"]
+    "#,
+        )
+        .create_config();
 }
 
 #[test]
 fn test_include_precedence_over_profile() {
-    let testdir = prepare_test_specific_dir();
-
-    let root_config = testdir.join("config.toml");
-    let root_config_content = br#"
-        profile = "dist"
-        include = ["./extension.toml"]
-    "#;
-    File::create(&root_config).unwrap().write_all(root_config_content).unwrap();
+    let test_ctx = TestCtx::new();
+    let testdir = test_ctx.dir();
 
     let extension = testdir.join("extension.toml");
     let extension_content = br#"
@@ -743,10 +636,15 @@ fn test_include_precedence_over_profile() {
     "#;
     File::create(extension).unwrap().write_all(extension_content).unwrap();
 
-    let config = Config::parse_inner(
-        Flags::parse(&["check".to_owned(), format!("--config={}", root_config.to_str().unwrap())]),
-        get_toml,
-    );
+    let config = test_ctx
+        .config("check")
+        .with_default_toml_config(
+            r#"
+        profile = "dist"
+        include = ["./extension.toml"]
+    "#,
+        )
+        .create_config();
 
     // "dist" profile would normally set the channel to "auto-detect", but includes should
     // override profile settings, so we expect this to be "dev" here.
diff --git a/src/bootstrap/src/core/config/toml/mod.rs b/src/bootstrap/src/core/config/toml/mod.rs
index 7af22432ef8..f6dc5b67e10 100644
--- a/src/bootstrap/src/core/config/toml/mod.rs
+++ b/src/bootstrap/src/core/config/toml/mod.rs
@@ -152,10 +152,6 @@ impl Config {
     }
 
     pub(crate) fn get_toml(file: &Path) -> Result<TomlConfig, toml::de::Error> {
-        #[cfg(test)]
-        return Ok(TomlConfig::default());
-
-        #[cfg(not(test))]
         Self::get_toml_inner(file)
     }
 
diff --git a/src/bootstrap/src/core/download.rs b/src/bootstrap/src/core/download.rs
index 2f3c80559c0..37871f0fe1e 100644
--- a/src/bootstrap/src/core/download.rs
+++ b/src/bootstrap/src/core/download.rs
@@ -106,7 +106,7 @@ enum DownloadSource {
 /// Functions that are only ever called once, but named for clarity and to avoid thousand-line functions.
 impl Config {
     pub(crate) fn download_clippy(&self) -> PathBuf {
-        self.verbose(|| println!("downloading stage0 clippy artifacts"));
+        self.do_if_verbose(|| println!("downloading stage0 clippy artifacts"));
 
         let date = &self.stage0_metadata.compiler.date;
         let version = &self.stage0_metadata.compiler.version;
@@ -151,7 +151,9 @@ impl Config {
     }
 
     pub(crate) fn download_ci_rustc(&self, commit: &str) {
-        self.verbose(|| println!("using downloaded stage2 artifacts from CI (commit {commit})"));
+        self.do_if_verbose(|| {
+            println!("using downloaded stage2 artifacts from CI (commit {commit})")
+        });
 
         let version = self.artifact_version_part(commit);
         // download-rustc doesn't need its own cargo, it can just use beta's. But it does need the
@@ -258,7 +260,7 @@ impl Config {
         let llvm_root = self.ci_llvm_root();
         let llvm_freshness =
             detect_llvm_freshness(self, self.rust_info.is_managed_git_subrepository());
-        self.verbose(|| {
+        self.do_if_verbose(|| {
             eprintln!("LLVM freshness: {llvm_freshness:?}");
         });
         let llvm_sha = match llvm_freshness {
@@ -557,7 +559,7 @@ pub(crate) fn download_beta_toolchain<'a>(dwn_ctx: impl AsRef<DownloadContext<'a
 #[cfg(not(test))]
 pub(crate) fn download_beta_toolchain<'a>(dwn_ctx: impl AsRef<DownloadContext<'a>>, out: &Path) {
     let dwn_ctx = dwn_ctx.as_ref();
-    dwn_ctx.exec_ctx.verbose(|| {
+    dwn_ctx.exec_ctx.do_if_verbose(|| {
         println!("downloading stage0 beta artifacts");
     });
 
@@ -812,7 +814,7 @@ fn download_component<'a>(
                 unpack(dwn_ctx.exec_ctx, &tarball, &bin_root, prefix);
                 return;
             } else {
-                dwn_ctx.exec_ctx.verbose(|| {
+                dwn_ctx.exec_ctx.do_if_verbose(|| {
                     println!(
                         "ignoring cached file {} due to failed verification",
                         tarball.display()
@@ -853,7 +855,7 @@ download-rustc = false
 pub(crate) fn verify(exec_ctx: &ExecutionContext, path: &Path, expected: &str) -> bool {
     use sha2::Digest;
 
-    exec_ctx.verbose(|| {
+    exec_ctx.do_if_verbose(|| {
         println!("verifying {}", path.display());
     });
 
@@ -934,7 +936,7 @@ fn unpack(exec_ctx: &ExecutionContext, tarball: &Path, dst: &Path, pattern: &str
         short_path = short_path.strip_prefix(pattern).unwrap_or(short_path);
         let dst_path = dst.join(short_path);
 
-        exec_ctx.verbose(|| {
+        exec_ctx.do_if_verbose(|| {
             println!("extracting {} to {}", original_path.display(), dst.display());
         });
 
@@ -965,7 +967,7 @@ fn download_file<'a>(
 ) {
     let dwn_ctx = dwn_ctx.as_ref();
 
-    dwn_ctx.exec_ctx.verbose(|| {
+    dwn_ctx.exec_ctx.do_if_verbose(|| {
         println!("download {url}");
     });
     // Use a temporary file in case we crash while downloading, to avoid a corrupt download in cache/.
diff --git a/src/bootstrap/src/core/sanity.rs b/src/bootstrap/src/core/sanity.rs
index 91d80c96e42..eaa9e3a6a3e 100644
--- a/src/bootstrap/src/core/sanity.rs
+++ b/src/bootstrap/src/core/sanity.rs
@@ -33,11 +33,7 @@ pub struct Finder {
 //
 // Targets can be removed from this list once they are present in the stage0 compiler (usually by updating the beta compiler of the bootstrap).
 const STAGE0_MISSING_TARGETS: &[&str] = &[
-    "armv7a-vex-v5",
-    "riscv64a23-unknown-linux-gnu",
     // just a dummy comment so the list doesn't get onelined
-    "aarch64_be-unknown-hermit",
-    "aarch64_be-unknown-none-softfloat",
     "x86_64-unknown-motor",
 ];
 
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index e953fe2945e..4f4d35673d5 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -415,7 +415,7 @@ macro_rules! forward {
 }
 
 forward! {
-    verbose(f: impl Fn()),
+    do_if_verbose(f: impl Fn()),
     is_verbose() -> bool,
     create(path: &Path, s: &str),
     remove(f: &Path),
@@ -601,11 +601,11 @@ impl Build {
             .unwrap()
             .trim();
         if local_release.split('.').take(2).eq(version.split('.').take(2)) {
-            build.verbose(|| println!("auto-detected local-rebuild {local_release}"));
+            build.do_if_verbose(|| println!("auto-detected local-rebuild {local_release}"));
             build.local_rebuild = true;
         }
 
-        build.verbose(|| println!("finding compilers"));
+        build.do_if_verbose(|| println!("finding compilers"));
         utils::cc_detect::fill_compilers(&mut build);
         // When running `setup`, the profile is about to change, so any requirements we have now may
         // be different on the next invocation. Don't check for them until the next time x.py is
@@ -613,7 +613,7 @@ impl Build {
         //
         // Similarly, for `setup` we don't actually need submodules or cargo metadata.
         if !matches!(build.config.cmd, Subcommand::Setup { .. }) {
-            build.verbose(|| println!("running sanity check"));
+            build.do_if_verbose(|| println!("running sanity check"));
             crate::core::sanity::check(&mut build);
 
             // Make sure we update these before gathering metadata so we don't get an error about missing
@@ -631,7 +631,7 @@ impl Build {
             // Now, update all existing submodules.
             build.update_existing_submodules();
 
-            build.verbose(|| println!("learning about cargo"));
+            build.do_if_verbose(|| println!("learning about cargo"));
             crate::core::metadata::build(&mut build);
         }
 
@@ -1087,18 +1087,6 @@ impl Build {
         })
     }
 
-    /// Check if verbosity is greater than the `level`
-    pub fn is_verbose_than(&self, level: usize) -> bool {
-        self.verbosity > level
-    }
-
-    /// Runs a function if verbosity is greater than `level`.
-    fn verbose_than(&self, level: usize, f: impl Fn()) {
-        if self.is_verbose_than(level) {
-            f()
-        }
-    }
-
     fn info(&self, msg: &str) {
         match self.config.get_dry_run() {
             DryRun::SelfCheck => (),
@@ -1816,7 +1804,6 @@ impl Build {
         if self.config.dry_run() {
             return;
         }
-        self.verbose_than(1, || println!("Copy/Link {src:?} to {dst:?}"));
         if src == dst {
             return;
         }
@@ -1933,7 +1920,10 @@ impl Build {
             return;
         }
         let dst = dstdir.join(src.file_name().unwrap());
-        self.verbose_than(1, || println!("Install {src:?} to {dst:?}"));
+
+        #[cfg(feature = "tracing")]
+        let _span = trace_io!("install", ?src, ?dst);
+
         t!(fs::create_dir_all(dstdir));
         if !src.exists() {
             panic!("ERROR: File \"{}\" not found!", src.display());
diff --git a/src/bootstrap/src/utils/build_stamp.rs b/src/bootstrap/src/utils/build_stamp.rs
index 4c35388a181..5cd68f6d4fe 100644
--- a/src/bootstrap/src/utils/build_stamp.rs
+++ b/src/bootstrap/src/utils/build_stamp.rs
@@ -112,7 +112,7 @@ pub fn clear_if_dirty(builder: &Builder<'_>, dir: &Path, input: &Path) -> bool {
     let stamp = BuildStamp::new(dir);
     let mut cleared = false;
     if mtime(stamp.path()) < mtime(input) {
-        builder.verbose(|| println!("Dirty - {}", dir.display()));
+        builder.do_if_verbose(|| println!("Dirty - {}", dir.display()));
         let _ = fs::remove_dir_all(dir);
         cleared = true;
     } else if stamp.path().exists() {
diff --git a/src/bootstrap/src/utils/cc_detect.rs b/src/bootstrap/src/utils/cc_detect.rs
index d3926df9650..0662ae304ac 100644
--- a/src/bootstrap/src/utils/cc_detect.rs
+++ b/src/bootstrap/src/utils/cc_detect.rs
@@ -137,16 +137,16 @@ pub fn fill_target_compiler(build: &mut Build, target: TargetSelection) {
         build.cxx.insert(target, compiler);
     }
 
-    build.verbose(|| println!("CC_{} = {:?}", target.triple, build.cc(target)));
-    build.verbose(|| println!("CFLAGS_{} = {cflags:?}", target.triple));
+    build.do_if_verbose(|| println!("CC_{} = {:?}", target.triple, build.cc(target)));
+    build.do_if_verbose(|| println!("CFLAGS_{} = {cflags:?}", target.triple));
     if let Ok(cxx) = build.cxx(target) {
         let mut cxxflags = build.cc_handled_clags(target, CLang::Cxx);
         cxxflags.extend(build.cc_unhandled_cflags(target, GitRepo::Rustc, CLang::Cxx));
-        build.verbose(|| println!("CXX_{} = {cxx:?}", target.triple));
-        build.verbose(|| println!("CXXFLAGS_{} = {cxxflags:?}", target.triple));
+        build.do_if_verbose(|| println!("CXX_{} = {cxx:?}", target.triple));
+        build.do_if_verbose(|| println!("CXXFLAGS_{} = {cxxflags:?}", target.triple));
     }
     if let Some(ar) = ar {
-        build.verbose(|| println!("AR_{} = {ar:?}", target.triple));
+        build.do_if_verbose(|| println!("AR_{} = {ar:?}", target.triple));
         build.ar.insert(target, ar);
     }
 
diff --git a/src/bootstrap/src/utils/exec.rs b/src/bootstrap/src/utils/exec.rs
index e09f3086b77..f875e6e1af7 100644
--- a/src/bootstrap/src/utils/exec.rs
+++ b/src/bootstrap/src/utils/exec.rs
@@ -630,7 +630,7 @@ impl ExecutionContext {
         &self.dry_run
     }
 
-    pub fn verbose(&self, f: impl Fn()) {
+    pub fn do_if_verbose(&self, f: impl Fn()) {
         if self.is_verbose() {
             f()
         }
@@ -686,7 +686,7 @@ impl ExecutionContext {
 
         if let Some(cached_output) = self.command_cache.get(&fingerprint) {
             command.mark_as_executed();
-            self.verbose(|| println!("Cache hit: {command:?}"));
+            self.do_if_verbose(|| println!("Cache hit: {command:?}"));
             self.profiler.record_cache_hit(fingerprint);
             return DeferredCommand { state: CommandState::Cached(cached_output) };
         }
@@ -713,7 +713,7 @@ impl ExecutionContext {
             };
         }
 
-        self.verbose(|| {
+        self.do_if_verbose(|| {
             println!("running: {command:?} (created at {created_at}, executed at {executed_at})")
         });
 
diff --git a/src/bootstrap/src/utils/helpers/tests.rs b/src/bootstrap/src/utils/helpers/tests.rs
index 9030ca2820a..676fe6cbd5f 100644
--- a/src/bootstrap/src/utils/helpers/tests.rs
+++ b/src/bootstrap/src/utils/helpers/tests.rs
@@ -6,6 +6,7 @@ use crate::utils::helpers::{
     check_cfg_arg, extract_beta_rev, hex_encode, make, set_file_times, submodule_path_of,
     symlink_dir,
 };
+use crate::utils::tests::TestCtx;
 use crate::{Config, Flags};
 
 #[test]
@@ -59,8 +60,7 @@ fn test_check_cfg_arg() {
 
 #[test]
 fn test_symlink_dir() {
-    let config =
-        Config::parse(Flags::parse(&["check".to_owned(), "--config=/does/not/exist".to_owned()]));
+    let config = TestCtx::new().config("check").no_dry_run().create_config();
     let tempdir = config.tempdir().join(".tmp-dir");
     let link_path = config.tempdir().join(".tmp-link");
 
@@ -80,8 +80,7 @@ fn test_symlink_dir() {
 
 #[test]
 fn test_set_file_times_sanity_check() {
-    let config =
-        Config::parse(Flags::parse(&["check".to_owned(), "--config=/does/not/exist".to_owned()]));
+    let config = TestCtx::new().config("check").create_config();
     let tempfile = config.tempdir().join(".tmp-file");
 
     {
@@ -102,9 +101,7 @@ fn test_set_file_times_sanity_check() {
 
 #[test]
 fn test_submodule_path_of() {
-    let config = Config::parse_inner(Flags::parse(&["build".into(), "--dry-run".into()]), |&_| {
-        Ok(Default::default())
-    });
+    let config = TestCtx::new().config("build").create_config();
 
     let build = crate::Build::new(config.clone());
     let builder = crate::core::builder::Builder::new(&build);
diff --git a/src/bootstrap/src/utils/render_tests.rs b/src/bootstrap/src/utils/render_tests.rs
index 90fd57d976d..e90a7ef4232 100644
--- a/src/bootstrap/src/utils/render_tests.rs
+++ b/src/bootstrap/src/utils/render_tests.rs
@@ -48,7 +48,7 @@ pub(crate) fn try_run_tests(
 }
 
 fn run_tests(builder: &Builder<'_>, cmd: &mut BootstrapCommand, stream: bool) -> bool {
-    builder.verbose(|| println!("running: {cmd:?}"));
+    builder.do_if_verbose(|| println!("running: {cmd:?}"));
 
     let Some(mut streaming_command) = cmd.stream_capture_stdout(&builder.config.exec_ctx) else {
         return true;
diff --git a/src/bootstrap/src/utils/tarball.rs b/src/bootstrap/src/utils/tarball.rs
index 7b77b212934..079afb7a005 100644
--- a/src/bootstrap/src/utils/tarball.rs
+++ b/src/bootstrap/src/utils/tarball.rs
@@ -356,7 +356,7 @@ impl<'a> Tarball<'a> {
 
         // For `x install` tarball files aren't needed, so we can speed up the process by not producing them.
         let compression_profile = if self.builder.kind == Kind::Install {
-            self.builder.verbose(|| {
+            self.builder.do_if_verbose(|| {
                 println!("Forcing dist.compression-profile = 'no-op' for `x install`.")
             });
             // "no-op" indicates that the rust-installer won't produce compressed tarball sources.
diff --git a/src/bootstrap/src/utils/tests/mod.rs b/src/bootstrap/src/utils/tests/mod.rs
index 3332187e2a8..764b89086cf 100644
--- a/src/bootstrap/src/utils/tests/mod.rs
+++ b/src/bootstrap/src/utils/tests/mod.rs
@@ -48,11 +48,20 @@ impl TestCtx {
 pub struct ConfigBuilder {
     args: Vec<String>,
     directory: PathBuf,
+    override_download_ci_llvm: bool,
+    dry_run: bool,
+    explicit_config: bool,
 }
 
 impl ConfigBuilder {
     fn from_args(args: &[&str], directory: PathBuf) -> Self {
-        Self { args: args.iter().copied().map(String::from).collect(), directory }
+        Self {
+            args: args.iter().copied().map(String::from).collect(),
+            directory,
+            override_download_ci_llvm: true,
+            dry_run: true,
+            explicit_config: true,
+        }
     }
 
     pub fn path(mut self, path: &str) -> Self {
@@ -98,18 +107,46 @@ impl ConfigBuilder {
         self
     }
 
-    pub fn create_config(mut self) -> Config {
-        // Run in dry-check, otherwise the test would be too slow
-        self.args.push("--dry-run".to_string());
+    pub fn with_default_toml_config(mut self, config_toml: &str) -> Self {
+        let toml_path = self.directory.join("bootstrap.toml");
+        std::fs::write(&toml_path, config_toml).unwrap();
+        self.explicit_config = false;
+        self.args.push("--config".to_string());
+        self.args.push(toml_path.display().to_string());
+        self
+    }
+
+    pub fn no_override_download_ci_llvm(mut self) -> Self {
+        self.override_download_ci_llvm = false;
+        self
+    }
+
+    pub fn no_dry_run(mut self) -> Self {
+        self.dry_run = false;
+        self
+    }
 
+    pub fn create_config(mut self) -> Config {
+        if self.dry_run {
+            // Run in dry-check, otherwise the test would be too slow
+            self.args.push("--dry-run".to_string());
+        }
         // Ignore submodules
         self.args.push("--set".to_string());
         self.args.push("build.submodules=false".to_string());
 
-        // Override any external LLVM set and inhibit CI LLVM; pretend that we're always building
-        // in-tree LLVM from sources.
-        self.args.push("--set".to_string());
-        self.args.push("llvm.download-ci-llvm=false".to_string());
+        if self.override_download_ci_llvm {
+            // Override any external LLVM set and inhibit CI LLVM; pretend that we're always building
+            // in-tree LLVM from sources.
+            self.args.push("--set".to_string());
+            self.args.push("llvm.download-ci-llvm=false".to_string());
+        }
+
+        // always use the bootstrap toml created in the
+        // temporary directory and not from the <src>
+        if self.explicit_config {
+            self = self.with_default_toml_config("");
+        }
 
         // Do not mess with the local rustc checkout build directory
         self.args.push("--build-dir".to_string());
diff --git a/src/doc/rustc/src/SUMMARY.md b/src/doc/rustc/src/SUMMARY.md
index e4bf33dd8a0..619eebd15bd 100644
--- a/src/doc/rustc/src/SUMMARY.md
+++ b/src/doc/rustc/src/SUMMARY.md
@@ -52,7 +52,6 @@
     - [aarch64_be-unknown-none-softfloat](platform-support/aarch64_be-unknown-none-softfloat.md)
     - [aarch64_be-unknown-linux-musl](platform-support/aarch64_be-unknown-linux-musl.md)
     - [amdgcn-amd-amdhsa](platform-support/amdgcn-amd-amdhsa.md)
-    - [armeb-unknown-linux-gnueabi](platform-support/armeb-unknown-linux-gnueabi.md)
     - [arm-none-eabi](platform-support/arm-none-eabi.md)
       - [armv4t-none-eabi](platform-support/armv4t-none-eabi.md)
       - [armv5te-none-eabi](platform-support/armv5te-none-eabi.md)
@@ -65,12 +64,14 @@
       - [thumbv7m-none-eabi](./platform-support/thumbv7m-none-eabi.md)
       - [thumbv8m.base-none-eabi](./platform-support/thumbv8m.base-none-eabi.md)
       - [thumbv8m.main-none-eabi\*](./platform-support/thumbv8m.main-none-eabi.md)
-    - [armv5te-unknown-linux-gnueabi](platform-support/armv5te-unknown-linux-gnueabi.md)
+    - [arm\*-unknown-linux-\*](./platform-support/arm-linux.md)
+        - [armeb-unknown-linux-gnueabi](platform-support/armeb-unknown-linux-gnueabi.md)
+        - [armv5te-unknown-linux-gnueabi](platform-support/armv5te-unknown-linux-gnueabi.md)
+        - [armv7-unknown-linux-uclibceabi](platform-support/armv7-unknown-linux-uclibceabi.md)
+        - [armv7-unknown-linux-uclibceabihf](platform-support/armv7-unknown-linux-uclibceabihf.md)
     - [armv6k-nintendo-3ds](platform-support/armv6k-nintendo-3ds.md)
     - [armv7-rtems-eabihf](platform-support/armv7-rtems-eabihf.md)
     - [armv7-sony-vita-newlibeabihf](platform-support/armv7-sony-vita-newlibeabihf.md)
-    - [armv7-unknown-linux-uclibceabi](platform-support/armv7-unknown-linux-uclibceabi.md)
-    - [armv7-unknown-linux-uclibceabihf](platform-support/armv7-unknown-linux-uclibceabihf.md)
     - [armv7a-vex-v5](platform-support/armv7a-vex-v5.md)
     - [\*-android and \*-androideabi](platform-support/android.md)
     - [\*-linux-ohos](platform-support/openharmony.md)
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index 99c8e365f5c..c0882a7a45e 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -156,8 +156,6 @@ target | std | notes
 `arm-unknown-linux-musleabi` | ✓ | Armv6 Linux with musl 1.2.3
 `arm-unknown-linux-musleabihf` | ✓ | Armv6 Linux with musl 1.2.3, hardfloat
 [`arm64ec-pc-windows-msvc`](platform-support/arm64ec-pc-windows-msvc.md) | ✓ | Arm64EC Windows MSVC
-[`armebv7r-none-eabi`](platform-support/armebv7r-none-eabi.md) | * | Bare Armv7-R, Big Endian
-[`armebv7r-none-eabihf`](platform-support/armebv7r-none-eabi.md) | * | Bare Armv7-R, Big Endian, hardfloat
 [`armv5te-unknown-linux-gnueabi`](platform-support/armv5te-unknown-linux-gnueabi.md) | ✓ | Armv5TE Linux (kernel 4.4+, glibc 2.23)
 `armv5te-unknown-linux-musleabi` | ✓ | Armv5TE Linux with musl 1.2.3
 [`armv7-linux-androideabi`](platform-support/android.md) | ✓ | Armv7-A Android
@@ -283,6 +281,8 @@ target | std | host | notes
 [`arm64e-apple-ios`](platform-support/arm64e-apple-ios.md) | ✓ | | ARM64e Apple iOS
 [`arm64e-apple-tvos`](platform-support/arm64e-apple-tvos.md)  | ✓ | | ARM64e Apple tvOS
 [`armeb-unknown-linux-gnueabi`](platform-support/armeb-unknown-linux-gnueabi.md) | ✓ | ? | Arm BE8 the default Arm big-endian architecture since [Armv6](https://developer.arm.com/documentation/101754/0616/armlink-Reference/armlink-Command-line-Options/--be8?lang=en).
+[`armebv7r-none-eabi`](platform-support/armebv7r-none-eabi.md) | * | Bare Armv7-R, Big Endian
+[`armebv7r-none-eabihf`](platform-support/armebv7r-none-eabi.md) | * | Bare Armv7-R, Big Endian, hardfloat
 [`armv4t-none-eabi`](platform-support/armv4t-none-eabi.md) | * |  | Bare Armv4T
 `armv4t-unknown-linux-gnueabi` | ? |  | Armv4T Linux
 [`armv5te-none-eabi`](platform-support/armv5te-none-eabi.md) | * |  | Bare Armv5TE
diff --git a/src/doc/rustc/src/platform-support/apple-ios-macabi.md b/src/doc/rustc/src/platform-support/apple-ios-macabi.md
index c6f68f7a1e8..0d0acaa3bef 100644
--- a/src/doc/rustc/src/platform-support/apple-ios-macabi.md
+++ b/src/doc/rustc/src/platform-support/apple-ios-macabi.md
@@ -57,7 +57,7 @@ $ rustc --target aarch64-apple-ios-macabi your-code.rs
 ```
 
 The target can be differentiated from the iOS targets with the
-`target_env = "macabi"` cfg (or `target_abi = "macabi"` before Rust CURRENT_RUSTC_VERSION).
+`target_env = "macabi"` cfg (or `target_abi = "macabi"` before Rust 1.91.0).
 
 ```rust
 if cfg!(target_env = "macabi") {
diff --git a/src/doc/rustc/src/platform-support/apple-ios.md b/src/doc/rustc/src/platform-support/apple-ios.md
index 3ac14704754..5de87dc349e 100644
--- a/src/doc/rustc/src/platform-support/apple-ios.md
+++ b/src/doc/rustc/src/platform-support/apple-ios.md
@@ -73,7 +73,7 @@ $ cargo +nightly build -Zbuild-std --target armv7s-apple-ios
 
 The simulator variants can be differentiated from the variants running
 on-device with the `target_env = "sim"` cfg (or `target_abi = "sim"` before
-Rust CURRENT_RUSTC_VERSION).
+Rust 1.91.0).
 
 ```rust
 if cfg!(all(target_vendor = "apple", target_env = "sim")) {
diff --git a/src/doc/rustc/src/platform-support/arm-linux.md b/src/doc/rustc/src/platform-support/arm-linux.md
new file mode 100644
index 00000000000..5f40743f3d0
--- /dev/null
+++ b/src/doc/rustc/src/platform-support/arm-linux.md
@@ -0,0 +1,217 @@
+# Arm Linux support in Rust
+
+The Arm Architecture has been around since the mid-1980s, going through nine
+major revisions, many minor revisions, and spanning both 32-bith and 64-bit
+architectures. This page covers 32-bit Arm platforms that run some form of
+Linux (but not Android). Those targets are:
+
+* `arm-unknown-linux-gnueabi`
+* `arm-unknown-linux-gnueabihf`
+* `arm-unknown-linux-musleabi`
+* `arm-unknown-linux-musleabihf`
+* [`armeb-unknown-linux-gnueabi`](armeb-unknown-linux-gnueabi.md)
+* `armv4t-unknown-linux-gnueabi`
+* [`armv5te-unknown-linux-gnueabi`](armv5te-unknown-linux-gnueabi.md)
+* `armv5te-unknown-linux-musleabi`
+* `armv5te-unknown-linux-uclibceabi`
+* `armv7-unknown-linux-gnueabi`
+* `armv7-unknown-linux-gnueabihf`
+* `armv7-unknown-linux-musleabi`
+* `armv7-unknown-linux-musleabihf`
+* `armv7-unknown-linux-ohos`
+* [`armv7-unknown-linux-uclibceabi`](armv7-unknown-linux-uclibceabi.md)
+* [`armv7-unknown-linux-uclibceabihf`](armv7-unknown-linux-uclibceabihf.md)
+* `thumbv7neon-unknown-linux-gnueabihf`
+* `thumbv7neon-unknown-linux-musleabihf`
+
+Some of these targets have dedicated pages and some do not. This is largely
+due to historical accident, or the enthusiasm of the maintainers. This
+document attempts to cover all the targets, but only in broad terms.
+
+To make sense of this list, the architecture and ABI component of the
+`<architecture>-unknown-linux-<abi>` tuple will be discussed separately.
+
+The second part of the tuple is `unknown` because these systems don't come
+from any one specific vendor (like `powerpc-ibm-aix` or
+`aarch64-apple-darwin`). The third part is `linux`, because this page only
+discusses Linux targets.
+
+## Architecture Component
+
+* `arm`
+* `armeb`
+* `armv4t`
+* `armv5te`
+* `armv7`
+* `thumbv7neon`
+
+The architecture component simply called `arm` corresponds to the Armv6
+architecture - that is, version 6 of the Arm Architecture as defined in
+version 6 of the Arm Architecture Reference Manual (the Arm ARM). This was the
+last 'legacy' release of the Arm architecture, before they split into
+Application, Real-Time and Microcontroller profiles (leading to Armv7-A,
+Armv7-R and Armv7-M). Processors that implement the Armv6 architecture include
+the ARM1176JZF-S, as found in BCM2835 SoC that powers the Raspberry Pi Zero.
+Arm processors are generally fairly backwards compatible, especially for
+user-mode code, so code compiled for the `arm` architecture should also work
+on newer ARMv7-A systems, or even 64/32-bit Armv8-A systems.
+
+The `armeb` architecture component specifies an Armv6 processor running in Big
+Endian mode (`eb` is for big-endian - the letters are backwards because
+engineers used to little-endian systems perceive big-endian numbers to be
+written into memory backwards, and they thought it was funnier like that).
+Most Arm processors can operate in either little-endian or big-endian mode and
+little-endian mode is by far the most common. However, if for whatever reason
+you wish to store your Most Significant Bytes first, these targets are
+available. They just aren't terribly well tested, or compatible with most
+existing pre-compiled Arm libraries.
+
+Targets that start with `armv4t` are for processors implementing the Armv4T
+architecture from 1994. These include the ARM7TDMI, as found in the Nokia 6110
+brick-phone and the Game Boy Advance. The 'T' stands for *Thumb* and indicate
+that the processors can execute smaller 16-bit versions of some of the 32-bit
+Arm instructions. Because a Thumb is like a small version of an Arm.
+
+Targets that start with `armv5te` are for processors implementing the Armv5TE
+architecture. These are mostly from the ARM9 family, like the ARM946E-S found
+in the Nintendo DS. If you are programming an Arm machine from the early
+2000s, this might be what you need.
+
+The `armv7` is arguably a misnomer, and it should be `armv7a`. This is because
+it corresponds to the Application profile of Armv7 (i.e. Armv7-A), as opposed
+to the Real-Time or Microcontroller profile. Processors implementing this
+architecture include the Cortex-A7 and Cortex-A8.
+
+The `thumbv7neon` component indicates support for a processor that implements
+ARMv7-A (the same as `armv7`), it generates Thumb instructions (technically
+Thumb-2, also known as the T32 ISA) as opposed to Arm instructions (also known
+as the A32 ISA). These instructions are smaller, giving more code per KB of
+RAM, but may have a performance penalty if they take two instructions to do
+something Arm instructions could do in one. It's a complex trade-off and you
+should be doing benchmarks to work out which is better for you, if you
+strongly care about code size and/or performance. This component also enables
+support for Arm's SIMD extensions, known as Neon. These extensions will
+improve performance for certain kinds of repetitive operations.
+
+## ABI Component
+
+* `gnueabi`
+* `gnueabihf`
+* `musleabi`
+* `musleabihf`
+* `ohos`
+* `uclibceabi`
+* `uclibceabihf`
+
+You will need to select the appropriate ABI to match the system you want to be
+running this code on. For example, running `eabihf` code on an `eabi` system
+will not work correctly.
+
+The `gnueabi` ABI component indicates support for using the GNU C Library
+(glibc), and the Arm Embedded ABI (EABI). The EABI is a replacement for the
+original ABI (now called the Old ABI or OABI), and it is the standard ABI for
+32-bit Arm systems. With this ABI, function parameters that are `f32` or `f64`
+are passed as if they were integers, instead of being passed via in FPU
+registers. Generally these targets also disable the use of the FPU entirely,
+although that isn't always true.
+
+The `gnueabihf` ABI component is like `gnueabi`, except that it support the
+'hard-float' of the EABI. That is, function parameters that are `f32` or `f64`
+are passed in FPU registers. Naturally, this makes the FPU mandatory.
+
+Most 'desktop' Linux distributions (Debian, Ubuntu, Fedora, etc) use the GNU C
+Library and so you should probably select either `gnueabi` or `gnueabihf`,
+depending on whether your distribution is using 'soft-float' (EABI) or
+'hard-float' (EABIHF). Debian happens to offer
+[both](https://wiki.debian.org/ArmEabiPort)
+[kinds](https://wiki.debian.org/ArmHardFloatPort).
+
+The `musleabi` and `musleabihf` ABI components offer support for the [musl C
+library](https://musl.libc.org/). This C library can be used to create 'static
+binaries' that have no run-time library requirements (a feature that glibc
+does not support). There are soft-float (`eabi`) and hard-float (`eabihf`)
+variants, as per the `gnu*` targets above.
+
+The `uclibceabi` and `uclibceabihf` ABI components are for the [uClibc-ng C
+library](https://uclibc-ng.org/). This is sometimes used in light-weight
+embedded Linux distributions, like those created with
+[buildroot](https://www.buildroot.org/).
+
+## Cross Compilation
+
+Unfortunately, 32-bit Arm machines are generally not the fastest around, and
+they don't have much RAM. This means you are likely to be cross-compiling.
+
+To do this, you need to give Rust a suitable linker to use - one that knows
+the Arm architecture, and more importantly, knows where to find a suitable C
+Library to link against.
+
+To do that, you can add the `linker` property to your `.cargo/config.toml`.
+Typically you would refer to a suitable copy of GCC that has built as a
+cross-compiler, alongside a C library.
+
+```toml
+[target.arm-unknown-linux-gnueabi]
+linker = "arm-linux-gnueabi-gcc"
+```
+
+On Debian Linux, you could install such a cross-compilation toolchain with
+`apt install gcc-arm-linux-gnueabi`. For more exotic combinations, you might
+need to build a bespoke version of GCC using [crosstool-ng].
+
+[crosstool-ng]: https://github.com/crosstool-ng/crosstool-ng
+
+Note that for GCC, all 32-bit Arm architectures are handled in the same build
+- there are no separate Armv4T or Armv6 builds of GCC. The architecture is
+selected with flags, like `-march=armv6`, but they aren't required for the
+linker.
+
+Let's assume we are on some Debian machine, and we want to build a basic Arm
+Linux binary for a distribution using the GNU C Library, targeting Armv6 with
+a hard-float ABI. Such a binary should work on a Raspberry Pi, for example.
+The commands are:
+
+```bash
+sudo apt install -y gcc-arm-linux-gnueabihf
+rustup target add arm-unknown-linux-gnueabihf
+cargo new --bin armdemo
+cd armdemo
+mkdir .cargo
+cat > .cargo/config.toml << EOF
+[target.arm-unknown-linux-gnueabihf]
+linker = "arm-linux-gnueabihf-gcc"
+EOF
+cargo build --target=arm-unknown-linux-gnueabihf
+```
+
+This will give us our ARM Linux binary for the GNU C Library with a soft-float ABI:
+
+```console
+$ file ./target/arm-unknown-linux-gnueabi/debug/armdemo
+./target/arm-unknown-linux-gnueabi/debug/armdemo: ELF 32-bit LSB pie
+  executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter
+  /lib/ld-linux.so.3, BuildID[sha1]=dd0b9aa5ae876330fd4e2fcf393850f083ec7fcd,
+  for GNU/Linux 3.2.0, with debug_info, not stripped
+```
+
+If you are building C code as part of your Rust project, you may want to
+direct `cc-rs` to use an appropriate cross-compiler with the `CROSS_COMPILE`
+environment variable. You may also want to set the CFLAGS environment variable
+for the target. For example:
+
+```bash
+export CROSS_COMPILE=arm-linux-gnueabi
+export CFLAGS_arm_unknown_linux_gnueabi="-march=armv6"
+```
+
+(Note that the dashes (`-`) turn to underscores (`_`) to form the name of the
+CFLAGS environment variable)
+
+If you are building for a Tier 3 target using `-Zbuild-std` (on Nightly Rust),
+you need to set these variables as well:
+
+```bash
+export CXX_arm_unknown_linux_gnueabi=arm-linux-gnueabi-g++
+export CC_arm_unknown_linux_gnueabi=arm-linux-gnueabi-gcc
+cargo +nightly build -Zbuild-std --target=arm-unknown-linux-gnueabi
+```
diff --git a/src/doc/rustc/src/platform-support/armeb-unknown-linux-gnueabi.md b/src/doc/rustc/src/platform-support/armeb-unknown-linux-gnueabi.md
index 7c1c5db7076..cd0623f73a1 100644
--- a/src/doc/rustc/src/platform-support/armeb-unknown-linux-gnueabi.md
+++ b/src/doc/rustc/src/platform-support/armeb-unknown-linux-gnueabi.md
@@ -3,6 +3,9 @@
 
 Target for cross-compiling Linux user-mode applications targeting the Arm BE8 architecture.
 
+See [`arm-linux`](arm-linux.md) for information applicable to all Arm Linux
+targets.
+
 ## Overview
 BE8 architecture retains the same little-endian ordered code-stream used by conventional little endian Arm systems, however the data accesses are in big-endian. BE8 is used primarily in high-performance networking applications where the ability to read packets in their native "Network Byte Order" is important (many network protocols transmit data in big-endian byte order for their wire formats).
 
diff --git a/src/doc/rustc/src/platform-support/armebv7r-none-eabi.md b/src/doc/rustc/src/platform-support/armebv7r-none-eabi.md
index 3e90319c373..d5c676ea9a4 100644
--- a/src/doc/rustc/src/platform-support/armebv7r-none-eabi.md
+++ b/src/doc/rustc/src/platform-support/armebv7r-none-eabi.md
@@ -1,6 +1,6 @@
 # `armebv7r-none-eabi` and `armebv7r-none-eabihf`
 
-* **Tier: 2**
+* **Tier: 3**
 * **Library Support:** core and alloc (bare-metal, `#![no_std]`)
 
 Bare-metal target for CPUs in the Armv7-R architecture family running in Big
diff --git a/src/doc/rustc/src/platform-support/armv5te-unknown-linux-gnueabi.md b/src/doc/rustc/src/platform-support/armv5te-unknown-linux-gnueabi.md
index 0aebbc34d40..a924f476411 100644
--- a/src/doc/rustc/src/platform-support/armv5te-unknown-linux-gnueabi.md
+++ b/src/doc/rustc/src/platform-support/armv5te-unknown-linux-gnueabi.md
@@ -5,6 +5,9 @@
 This target supports Linux programs with glibc on ARMv5TE CPUs without
 floating-point units.
 
+See [`arm-linux`](arm-linux.md) for information applicable to all Arm Linux
+targets.
+
 ## Target maintainers
 
 There are currently no formally documented target maintainers.
diff --git a/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabi.md b/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabi.md
index e553c49589d..4ab0a07090a 100644
--- a/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabi.md
+++ b/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabi.md
@@ -4,6 +4,9 @@
 
 This target supports Armv7-A softfloat CPUs and uses the uclibc-ng standard library. This is a common configuration on many consumer routers (e.g., Netgear R7000, Asus RT-AC68U).
 
+See [`arm-linux`](arm-linux.md) for information applicable to all Arm Linux
+targets.
+
 ## Target maintainers
 
 [@lancethepants](https://github.com/lancethepants)
diff --git a/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabihf.md b/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabihf.md
index 91f3ea886cc..9fb24906b4f 100644
--- a/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabihf.md
+++ b/src/doc/rustc/src/platform-support/armv7-unknown-linux-uclibceabihf.md
@@ -4,6 +4,9 @@
 
 This tier supports the Armv7-A processor running a Linux kernel and uClibc-ng standard library.  It provides full support for rust and the rust standard library.
 
+See [`arm-linux`](arm-linux.md) for information applicable to all Arm Linux
+targets.
+
 ## Target Maintainers
 
 [@skrap](https://github.com/skrap)
diff --git a/src/doc/rustdoc/src/write-documentation/linking-to-items-by-name.md b/src/doc/rustdoc/src/write-documentation/linking-to-items-by-name.md
index 5e785483402..b1495b2575e 100644
--- a/src/doc/rustdoc/src/write-documentation/linking-to-items-by-name.md
+++ b/src/doc/rustdoc/src/write-documentation/linking-to-items-by-name.md
@@ -90,7 +90,7 @@ fn Foo() {}
 These prefixes will be stripped when displayed in the documentation, so `[struct@Foo]` will be
 rendered as `Foo`. The following prefixes are available: `struct`, `enum`, `trait`, `union`,
 `mod`, `module`, `const`, `constant`, `fn`, `function`, `field`, `variant`, `method`, `derive`,
-`type`, `value`, `macro`, `prim` or `primitive`.
+`type`, `value`, `macro`, `tyalias`, `typealias`, `prim` or `primitive`.
 
 You can also disambiguate for functions by adding `()` after the function name,
 or for macros by adding `!` after the macro name. The macro `!` can be followed by `()`, `{}`,
diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 9a14137a6e8..d06540a65b5 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -603,7 +603,12 @@ impl AllTypes {
         }
 
         fmt::from_fn(|f| {
-            f.write_str("<h1>List of all items</h1>")?;
+            f.write_str(
+                "<div class=\"main-heading\">\
+                    <h1>List of all items</h1>\
+                    <rustdoc-toolbar></rustdoc-toolbar>\
+                </div>",
+            )?;
             // Note: print_entries does not escape the title, because we know the current set of titles
             // doesn't require escaping.
             print_entries(&self.structs, ItemSection::Structs).fmt(f)?;
diff --git a/src/librustdoc/html/render/write_shared.rs b/src/librustdoc/html/render/write_shared.rs
index e37a5246a76..3a1db805d01 100644
--- a/src/librustdoc/html/render/write_shared.rs
+++ b/src/librustdoc/html/render/write_shared.rs
@@ -386,8 +386,13 @@ impl CratesIndexPart {
         let layout = &cx.shared.layout;
         let style_files = &cx.shared.style_files;
         const DELIMITER: &str = "\u{FFFC}"; // users are being naughty if they have this
-        let content =
-            format!("<h1>List of all crates</h1><ul class=\"all-items\">{DELIMITER}</ul>");
+        let content = format!(
+            "<div class=\"main-heading\">\
+                <h1>List of all crates</h1>\
+                <rustdoc-toolbar></rustdoc-toolbar>\
+            </div>\
+            <ul class=\"all-items\">{DELIMITER}</ul>"
+        );
         let template = layout::render(layout, &page, "", content, style_files);
         SortedTemplate::from_template(&template, DELIMITER)
             .expect("Object Replacement Character (U+FFFC) should not appear in the --index-page")
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 5d8f8f4bed1..c4f24e09ddb 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -1,5 +1,4 @@
 // tidy-alphabetical-start
-#![cfg_attr(bootstrap, feature(round_char_boundary))]
 #![doc(
     html_root_url = "https://doc.rust-lang.org/nightly/",
     html_playground_url = "https://play.rust-lang.org/"
diff --git a/src/librustdoc/passes/collect_intra_doc_links.rs b/src/librustdoc/passes/collect_intra_doc_links.rs
index 0da42f38251..79d74c3c4eb 100644
--- a/src/librustdoc/passes/collect_intra_doc_links.rs
+++ b/src/librustdoc/passes/collect_intra_doc_links.rs
@@ -130,6 +130,7 @@ impl Res {
             DefKind::Static { .. } => "static",
             DefKind::Field => "field",
             DefKind::Variant | DefKind::Ctor(..) => "variant",
+            DefKind::TyAlias => "tyalias",
             // Now handle things that don't have a specific disambiguator
             _ => match kind
                 .ns()
@@ -1708,6 +1709,7 @@ impl Disambiguator {
                 "value" => NS(Namespace::ValueNS),
                 "macro" => NS(Namespace::MacroNS),
                 "prim" | "primitive" => Primitive,
+                "tyalias" | "typealias" => Kind(DefKind::TyAlias),
                 _ => return Err((format!("unknown disambiguator `{prefix}`"), 0..idx)),
             };
 
diff --git a/src/stage0 b/src/stage0
index a705cd1c760..6d2f0402f4a 100644
--- a/src/stage0
+++ b/src/stage0
@@ -13,506 +13,506 @@ nightly_branch=master
 # All changes below this comment will be overridden the next time the
 # tool is executed.
 
-compiler_date=2025-08-05
+compiler_date=2025-09-16
 compiler_version=beta
-rustfmt_date=2025-09-05
+rustfmt_date=2025-09-16
 rustfmt_version=nightly
 
-dist/2025-08-05/rustc-beta-aarch64-apple-darwin.tar.gz=b9d8f74da46aeadb6c650a4ccfc3c2de08e229e4211a198fa2914103f09f579d
-dist/2025-08-05/rustc-beta-aarch64-apple-darwin.tar.xz=493ed87c65bac5593c104373a3277ddc2330072796704e4b6800c531326da860
-dist/2025-08-05/rustc-beta-aarch64-pc-windows-gnullvm.tar.gz=6c20a3b2e4d3ef9a54b1fe4f50c71895d4d8557d6960f887ef4958c0f2a19eab
-dist/2025-08-05/rustc-beta-aarch64-pc-windows-gnullvm.tar.xz=d6bffc013745c0d69f4cf7ab4f747f8ad885e3b1b77fa56c2e7de8808e278294
-dist/2025-08-05/rustc-beta-aarch64-pc-windows-msvc.tar.gz=3b6bf7e2aff93854346c1d0970cf207c049c17c5ea6ee299dcdb1fd92e996fc0
-dist/2025-08-05/rustc-beta-aarch64-pc-windows-msvc.tar.xz=8241fdc7c673499091700cfcfafe10f3b70bf91918a3b7204a73d2b28445cfa5
-dist/2025-08-05/rustc-beta-aarch64-unknown-linux-gnu.tar.gz=36a093e6c99f227e293ebcaebc89e58166e3da7447d2499069c616610fb4e691
-dist/2025-08-05/rustc-beta-aarch64-unknown-linux-gnu.tar.xz=7cad77f36dcabbe77d603b8b3b4bfa83488a3af2e9b815f698f544de148c77a8
-dist/2025-08-05/rustc-beta-aarch64-unknown-linux-musl.tar.gz=421980aa1ef5467f59c1a8ad43415d69057c9277fdc91d1d5c2b53c246e8bbe9
-dist/2025-08-05/rustc-beta-aarch64-unknown-linux-musl.tar.xz=0ba5b4cd4f5975a58cf86331de5a3c80fb2fd620d50797360a5af4ebf2bba575
-dist/2025-08-05/rustc-beta-arm-unknown-linux-gnueabi.tar.gz=13b3e61ca606bfdf90d46a8873ca4f14fa07ad8bd77364f1a85f557f31ba7299
-dist/2025-08-05/rustc-beta-arm-unknown-linux-gnueabi.tar.xz=f6a1991e55af549d6cd59ddbebb6d2289d90d1e37b2a9449d7831b4c117a54bf
-dist/2025-08-05/rustc-beta-arm-unknown-linux-gnueabihf.tar.gz=a5533df1ae642bcea571aa6c2b5eda16a56c6cd597906081840bb7531f7b02a3
-dist/2025-08-05/rustc-beta-arm-unknown-linux-gnueabihf.tar.xz=2a7187ad6d0215f07d0472880e117556508780e37df6e2a1a7fdbb67fd8dc87e
-dist/2025-08-05/rustc-beta-armv7-unknown-linux-gnueabihf.tar.gz=3ae6e7d83ae3e1c5c8030ba93b9103addaf11f0f8807f1fbf813305d8e6a9188
-dist/2025-08-05/rustc-beta-armv7-unknown-linux-gnueabihf.tar.xz=324d6de1a8e4d9c1dd13cc86665fd06cb167d4a3ea55607cd5353300733f480e
-dist/2025-08-05/rustc-beta-i686-pc-windows-gnu.tar.gz=0bc4b50638818008e054af245d4e987ce5e55fdc56e19d31c18e8c0165f860ab
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diff --git a/src/tools/clippy/clippy_lints/src/lib.rs b/src/tools/clippy/clippy_lints/src/lib.rs
index c56fa257b06..b0083b99f17 100644
--- a/src/tools/clippy/clippy_lints/src/lib.rs
+++ b/src/tools/clippy/clippy_lints/src/lib.rs
@@ -7,7 +7,6 @@
 #![feature(iter_intersperse)]
 #![feature(iter_partition_in_place)]
 #![feature(never_type)]
-#![cfg_attr(bootstrap, feature(round_char_boundary))]
 #![feature(rustc_private)]
 #![feature(stmt_expr_attributes)]
 #![feature(unwrap_infallible)]
diff --git a/src/tools/clippy/tests/missing-test-files.rs b/src/tools/clippy/tests/missing-test-files.rs
index 63f960c92fa..9fff3132498 100644
--- a/src/tools/clippy/tests/missing-test-files.rs
+++ b/src/tools/clippy/tests/missing-test-files.rs
@@ -1,6 +1,5 @@
 #![warn(rust_2018_idioms, unused_lifetimes)]
 #![allow(clippy::assertions_on_constants)]
-#![cfg_attr(bootstrap, feature(path_file_prefix))]
 
 use std::cmp::Ordering;
 use std::ffi::OsStr;
diff --git a/src/tools/clippy/tests/ui/author/macro_in_closure.stdout b/src/tools/clippy/tests/ui/author/macro_in_closure.stdout
index 49595e2fec2..786c61e0c01 100644
--- a/src/tools/clippy/tests/ui/author/macro_in_closure.stdout
+++ b/src/tools/clippy/tests/ui/author/macro_in_closure.stdout
@@ -10,34 +10,42 @@ if let StmtKind::Let(local) = stmt.kind
     && paths::STD_IO_STDIO__PRINT.matches_path(cx, func) // Add the path to `clippy_utils::paths` if needed
     && args.len() == 1
     && let ExprKind::Block(block1, None) = args[0].kind
-    && block1.stmts.len() == 1
+    && block1.stmts.len() == 2
     && let StmtKind::Let(local1) = block1.stmts[0].kind
     && let Some(init1) = local1.init
-    && let ExprKind::Array(elements) = init1.kind
+    && let ExprKind::Tup(elements) = init1.kind
     && elements.len() == 1
-    && let ExprKind::Call(func1, args1) = elements[0].kind
-    && paths::CORE_FMT_RT_ARGUMENT_NEW_DISPLAY.matches_path(cx, func1) // Add the path to `clippy_utils::paths` if needed
-    && args1.len() == 1
-    && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = args1[0].kind
+    && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = elements[0].kind
     && let PatKind::Binding(BindingMode::NONE, _, name, None) = local1.pat.kind
     && name.as_str() == "args"
+    && let StmtKind::Let(local2) = block1.stmts[1].kind
+    && let Some(init2) = local2.init
+    && let ExprKind::Array(elements1) = init2.kind
+    && elements1.len() == 1
+    && let ExprKind::Call(func1, args1) = elements1[0].kind
+    && paths::CORE_FMT_RT_ARGUMENT_NEW_DISPLAY.matches_path(cx, func1) // Add the path to `clippy_utils::paths` if needed
+    && args1.len() == 1
+    && let ExprKind::Field(object, field_name) = args1[0].kind
+    && field_name.as_str() == "0"
+    && let PatKind::Binding(BindingMode::NONE, _, name1, None) = local2.pat.kind
+    && name1.as_str() == "args"
     && let Some(trailing_expr) = block1.expr
     && let ExprKind::Call(func2, args2) = trailing_expr.kind
     && paths::CORE_FMT_RT_NEW_V1.matches_path(cx, func2) // Add the path to `clippy_utils::paths` if needed
     && args2.len() == 2
     && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner1) = args2[0].kind
-    && let ExprKind::Array(elements1) = inner1.kind
-    && elements1.len() == 2
-    && let ExprKind::Lit(ref lit) = elements1[0].kind
+    && let ExprKind::Array(elements2) = inner1.kind
+    && elements2.len() == 2
+    && let ExprKind::Lit(ref lit) = elements2[0].kind
     && let LitKind::Str(s, _) = lit.node
     && s.as_str() == ""
-    && let ExprKind::Lit(ref lit1) = elements1[1].kind
+    && let ExprKind::Lit(ref lit1) = elements2[1].kind
     && let LitKind::Str(s1, _) = lit1.node
     && s1.as_str() == "\n"
     && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner2) = args2[1].kind
     && block.expr.is_none()
-    && let PatKind::Binding(BindingMode::NONE, _, name1, None) = local.pat.kind
-    && name1.as_str() == "print_text"
+    && let PatKind::Binding(BindingMode::NONE, _, name2, None) = local.pat.kind
+    && name2.as_str() == "print_text"
 {
     // report your lint here
 }
diff --git a/src/tools/clippy/tests/ui/author/macro_in_loop.stdout b/src/tools/clippy/tests/ui/author/macro_in_loop.stdout
index 4fc7b49464d..80717900b52 100644
--- a/src/tools/clippy/tests/ui/author/macro_in_loop.stdout
+++ b/src/tools/clippy/tests/ui/author/macro_in_loop.stdout
@@ -20,28 +20,36 @@ if let Some(higher::ForLoop { pat: pat, arg: arg, body: body, .. }) = higher::Fo
     && paths::STD_IO_STDIO__PRINT.matches_path(cx, func) // Add the path to `clippy_utils::paths` if needed
     && args.len() == 1
     && let ExprKind::Block(block2, None) = args[0].kind
-    && block2.stmts.len() == 1
+    && block2.stmts.len() == 2
     && let StmtKind::Let(local) = block2.stmts[0].kind
     && let Some(init) = local.init
-    && let ExprKind::Array(elements) = init.kind
+    && let ExprKind::Tup(elements) = init.kind
     && elements.len() == 1
-    && let ExprKind::Call(func1, args1) = elements[0].kind
-    && paths::CORE_FMT_RT_ARGUMENT_NEW_DISPLAY.matches_path(cx, func1) // Add the path to `clippy_utils::paths` if needed
-    && args1.len() == 1
-    && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = args1[0].kind
+    && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = elements[0].kind
     && let PatKind::Binding(BindingMode::NONE, _, name1, None) = local.pat.kind
     && name1.as_str() == "args"
+    && let StmtKind::Let(local1) = block2.stmts[1].kind
+    && let Some(init1) = local1.init
+    && let ExprKind::Array(elements1) = init1.kind
+    && elements1.len() == 1
+    && let ExprKind::Call(func1, args1) = elements1[0].kind
+    && paths::CORE_FMT_RT_ARGUMENT_NEW_DISPLAY.matches_path(cx, func1) // Add the path to `clippy_utils::paths` if needed
+    && args1.len() == 1
+    && let ExprKind::Field(object, field_name) = args1[0].kind
+    && field_name.as_str() == "0"
+    && let PatKind::Binding(BindingMode::NONE, _, name2, None) = local1.pat.kind
+    && name2.as_str() == "args"
     && let Some(trailing_expr) = block2.expr
     && let ExprKind::Call(func2, args2) = trailing_expr.kind
     && paths::CORE_FMT_RT_NEW_V1.matches_path(cx, func2) // Add the path to `clippy_utils::paths` if needed
     && args2.len() == 2
     && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner1) = args2[0].kind
-    && let ExprKind::Array(elements1) = inner1.kind
-    && elements1.len() == 2
-    && let ExprKind::Lit(ref lit2) = elements1[0].kind
+    && let ExprKind::Array(elements2) = inner1.kind
+    && elements2.len() == 2
+    && let ExprKind::Lit(ref lit2) = elements2[0].kind
     && let LitKind::Str(s, _) = lit2.node
     && s.as_str() == ""
-    && let ExprKind::Lit(ref lit3) = elements1[1].kind
+    && let ExprKind::Lit(ref lit3) = elements2[1].kind
     && let LitKind::Str(s1, _) = lit3.node
     && s1.as_str() == "\n"
     && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner2) = args2[1].kind
diff --git a/src/tools/clippy/tests/ui/useless_attribute.fixed b/src/tools/clippy/tests/ui/useless_attribute.fixed
index 15070dd9c2c..e0bc23e0788 100644
--- a/src/tools/clippy/tests/ui/useless_attribute.fixed
+++ b/src/tools/clippy/tests/ui/useless_attribute.fixed
@@ -153,7 +153,7 @@ pub mod redundant_imports_issue {
         () => {};
     }
 
-    #[expect(redundant_imports)]
+    #[expect(unused_imports)]
     pub(crate) use empty;
 
     empty!();
diff --git a/src/tools/clippy/tests/ui/useless_attribute.rs b/src/tools/clippy/tests/ui/useless_attribute.rs
index 3f530de7fd8..30a4c354b23 100644
--- a/src/tools/clippy/tests/ui/useless_attribute.rs
+++ b/src/tools/clippy/tests/ui/useless_attribute.rs
@@ -153,7 +153,7 @@ pub mod redundant_imports_issue {
         () => {};
     }
 
-    #[expect(redundant_imports)]
+    #[expect(unused_imports)]
     pub(crate) use empty;
 
     empty!();
diff --git a/src/tools/miri/src/lib.rs b/src/tools/miri/src/lib.rs
index 7f5f25b9f66..1f82f154b0b 100644
--- a/src/tools/miri/src/lib.rs
+++ b/src/tools/miri/src/lib.rs
@@ -1,4 +1,3 @@
-#![cfg_attr(bootstrap, feature(strict_overflow_ops))]
 #![feature(abort_unwind)]
 #![feature(cfg_select)]
 #![feature(rustc_private)]
diff --git a/src/tools/miri/tests/panic/mir-validation.rs b/src/tools/miri/tests/panic/mir-validation.rs
index b9097f2e8c5..2d0d530754d 100644
--- a/src/tools/miri/tests/panic/mir-validation.rs
+++ b/src/tools/miri/tests/panic/mir-validation.rs
@@ -9,11 +9,6 @@
 // and we don't even get a regular panic; rustc aborts with a different exit code instead.
 //@ignore-host: windows
 
-// FIXME: this tests a crash in rustc. For stage1, rustc is built with the downloaded standard
-// library which doesn't yet print the thread ID. Normalization can be removed at the stage bump.
-// For the grep: cfg(bootstrap)
-//@normalize-stderr-test: "thread 'rustc' panicked" -> "thread 'rustc' ($$TID) panicked"
-
 #![feature(custom_mir, core_intrinsics)]
 use core::intrinsics::mir::*;
 
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/derive_macro.rs b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/derive_macro.rs
index 15e68ff95cd..0fa412ad7fa 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/derive_macro.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/derive_macro.rs
@@ -12,7 +12,7 @@ use tracing::debug;
 
 use crate::{
     ExpandError, ExpandResult, MacroCallId,
-    builtin::quote::{dollar_crate, quote},
+    builtin::quote::dollar_crate,
     db::ExpandDatabase,
     hygiene::span_with_def_site_ctxt,
     name::{self, AsName, Name},
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs
index ec344613761..6fe63f249cd 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs
@@ -19,7 +19,7 @@ use syntax_bridge::syntax_node_to_token_tree;
 
 use crate::{
     EditionedFileId, ExpandError, ExpandResult, Lookup as _, MacroCallId,
-    builtin::quote::{WithDelimiter, dollar_crate, quote},
+    builtin::quote::{WithDelimiter, dollar_crate},
     db::ExpandDatabase,
     hygiene::{span_with_call_site_ctxt, span_with_def_site_ctxt},
     name,
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs
index 70c38d4d7c7..84dd4a24d90 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs
@@ -229,8 +229,6 @@ mod tests {
     use span::{Edition, ROOT_ERASED_FILE_AST_ID, SpanAnchor, SyntaxContext};
     use syntax::{TextRange, TextSize};
 
-    use super::quote;
-
     const DUMMY: tt::Span = tt::Span {
         range: TextRange::empty(TextSize::new(0)),
         anchor: SpanAnchor {
diff --git a/src/tools/rustfmt/src/config/mod.rs b/src/tools/rustfmt/src/config/mod.rs
index 6b63108c037..525953bf445 100644
--- a/src/tools/rustfmt/src/config/mod.rs
+++ b/src/tools/rustfmt/src/config/mod.rs
@@ -516,7 +516,6 @@ mod test {
     #[allow(dead_code)]
     mod mock {
         use super::super::*;
-        use crate::config_option_with_style_edition_default;
         use rustfmt_config_proc_macro::config_type;
 
         #[config_type]
diff --git a/tests/coverage/issue-83601.cov-map b/tests/coverage/issue-83601.cov-map
index d1d751ff24b..e42b5591c0f 100644
--- a/tests/coverage/issue-83601.cov-map
+++ b/tests/coverage/issue-83601.cov-map
@@ -1,30 +1,22 @@
 Function name: issue_83601::main
-Raw bytes (76): 0x[01, 01, 01, 05, 09, 0e, 01, 06, 01, 00, 0a, 01, 01, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 05, 01, 09, 00, 0c, 05, 00, 0f, 00, 15, 05, 01, 05, 00, 0f, 02, 01, 05, 00, 0d, 02, 00, 0e, 00, 14, 02, 01, 05, 00, 0d, 02, 00, 0e, 00, 14, 02, 01, 05, 00, 0d, 02, 00, 0e, 00, 14, 02, 01, 01, 00, 02]
+Raw bytes (74): 0x[01, 01, 00, 0e, 01, 06, 01, 00, 0a, 01, 01, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 01, 01, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => $DIR/issue-83601.rs
-Number of expressions: 1
-- expression 0 operands: lhs = Counter(1), rhs = Counter(2)
+Number of expressions: 0
 Number of file 0 mappings: 14
 - Code(Counter(0)) at (prev + 6, 1) to (start + 0, 10)
 - Code(Counter(0)) at (prev + 1, 9) to (start + 0, 12)
 - Code(Counter(0)) at (prev + 0, 15) to (start + 0, 21)
 - Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(1)) at (prev + 1, 9) to (start + 0, 12)
-- Code(Counter(1)) at (prev + 0, 15) to (start + 0, 21)
-- Code(Counter(1)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Expression(0, Sub)) at (prev + 1, 5) to (start + 0, 13)
-    = (c1 - c2)
-- Code(Expression(0, Sub)) at (prev + 0, 14) to (start + 0, 20)
-    = (c1 - c2)
-- Code(Expression(0, Sub)) at (prev + 1, 5) to (start + 0, 13)
-    = (c1 - c2)
-- Code(Expression(0, Sub)) at (prev + 0, 14) to (start + 0, 20)
-    = (c1 - c2)
-- Code(Expression(0, Sub)) at (prev + 1, 5) to (start + 0, 13)
-    = (c1 - c2)
-- Code(Expression(0, Sub)) at (prev + 0, 14) to (start + 0, 20)
-    = (c1 - c2)
-- Code(Expression(0, Sub)) at (prev + 1, 1) to (start + 0, 2)
-    = (c1 - c2)
-Highest counter ID seen: c1
+- Code(Counter(0)) at (prev + 1, 9) to (start + 0, 12)
+- Code(Counter(0)) at (prev + 0, 15) to (start + 0, 21)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 1) to (start + 0, 2)
+Highest counter ID seen: c0
 
diff --git a/tests/coverage/issue-84561.cov-map b/tests/coverage/issue-84561.cov-map
index 2b643ea599e..e5bb1afdcc2 100644
--- a/tests/coverage/issue-84561.cov-map
+++ b/tests/coverage/issue-84561.cov-map
@@ -73,20 +73,20 @@ Number of file 0 mappings: 4
 Highest counter ID seen: c0
 
 Function name: issue_84561::test3
-Raw bytes (409): 0x[01, 01, 0a, 0d, 11, 0d, 15, 0d, 19, 1d, 21, 29, 2d, 25, 29, 25, 29, 25, 29, 27, 31, 29, 2d, 4d, 01, 08, 01, 00, 0b, 01, 01, 09, 00, 10, 01, 00, 13, 00, 2e, 01, 01, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 05, 01, 09, 00, 0c, 05, 00, 0f, 00, 15, 05, 01, 05, 00, 0f, 09, 01, 05, 00, 0d, 09, 00, 0e, 00, 14, 09, 01, 05, 00, 0d, 09, 00, 0e, 00, 14, 09, 01, 05, 00, 0d, 09, 00, 0e, 00, 14, 09, 02, 05, 00, 0f, 09, 01, 05, 00, 0f, 09, 01, 05, 00, 0f, 09, 01, 09, 00, 0c, 09, 00, 0f, 00, 15, 09, 01, 05, 00, 0f, 0d, 01, 05, 00, 0f, 0d, 01, 05, 00, 0f, 00, 00, 20, 00, 30, 0d, 01, 05, 00, 0d, 0d, 00, 0e, 00, 14, 0d, 01, 05, 00, 0d, 0d, 00, 0e, 00, 14, 0d, 02, 05, 00, 0f, 00, 00, 20, 00, 24, 00, 00, 29, 00, 30, 00, 00, 33, 00, 41, 00, 00, 4b, 00, 5a, 0d, 01, 05, 00, 0f, 00, 05, 09, 00, 0d, 00, 03, 09, 00, 10, 00, 02, 0d, 00, 1b, 00, 02, 0d, 00, 1c, 0d, 04, 09, 00, 10, 0d, 00, 13, 00, 2e, 0d, 02, 05, 00, 0f, 0d, 04, 05, 00, 0f, 0d, 04, 05, 00, 0f, 0d, 04, 09, 00, 0c, 0d, 00, 0f, 00, 15, 0d, 01, 05, 00, 0f, 0d, 04, 08, 00, 0f, 11, 01, 09, 00, 13, 02, 05, 09, 00, 13, 0d, 05, 08, 00, 0f, 15, 01, 09, 00, 13, 00, 03, 0d, 00, 1d, 06, 03, 09, 00, 13, 00, 03, 0d, 00, 1d, 0d, 03, 05, 00, 0f, 0d, 01, 0c, 00, 13, 19, 01, 0d, 00, 13, 0a, 02, 0d, 00, 13, 1d, 04, 05, 00, 0f, 1d, 02, 0c, 00, 13, 21, 01, 0d, 00, 13, 0e, 02, 0d, 00, 13, 27, 03, 05, 00, 0f, 25, 01, 0c, 00, 13, 29, 01, 0d, 00, 17, 29, 04, 0d, 00, 13, 1e, 02, 0d, 00, 17, 1e, 01, 14, 00, 1b, 00, 01, 15, 00, 1b, 1e, 02, 15, 00, 1b, 2d, 04, 0d, 00, 13, 22, 03, 09, 00, 19, 31, 02, 05, 00, 0f, 31, 03, 09, 00, 22, 00, 02, 05, 00, 0f, 00, 03, 09, 00, 2c, 00, 02, 01, 00, 02]
+Raw bytes (409): 0x[01, 01, 0a, 01, 05, 01, 09, 01, 0d, 11, 15, 1d, 21, 19, 1d, 19, 1d, 19, 1d, 27, 25, 1d, 21, 4d, 01, 08, 01, 00, 0b, 01, 01, 09, 00, 10, 01, 00, 13, 00, 2e, 01, 01, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 01, 01, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 02, 05, 00, 0f, 01, 01, 05, 00, 0f, 01, 01, 05, 00, 0f, 01, 01, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 01, 01, 05, 00, 0f, 01, 01, 05, 00, 0f, 00, 00, 20, 00, 30, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 01, 05, 00, 0d, 01, 00, 0e, 00, 14, 01, 02, 05, 00, 0f, 00, 00, 20, 00, 24, 00, 00, 29, 00, 30, 00, 00, 33, 00, 41, 00, 00, 4b, 00, 5a, 01, 01, 05, 00, 0f, 00, 05, 09, 00, 0d, 00, 03, 09, 00, 10, 00, 02, 0d, 00, 1b, 00, 02, 0d, 00, 1c, 01, 04, 09, 00, 10, 01, 00, 13, 00, 2e, 01, 02, 05, 00, 0f, 01, 04, 05, 00, 0f, 01, 04, 05, 00, 0f, 01, 04, 09, 00, 0c, 01, 00, 0f, 00, 15, 01, 01, 05, 00, 0f, 01, 04, 08, 00, 0f, 05, 01, 09, 00, 13, 02, 05, 09, 00, 13, 01, 05, 08, 00, 0f, 09, 01, 09, 00, 13, 00, 03, 0d, 00, 1d, 06, 03, 09, 00, 13, 00, 03, 0d, 00, 1d, 01, 03, 05, 00, 0f, 01, 01, 0c, 00, 13, 0d, 01, 0d, 00, 13, 0a, 02, 0d, 00, 13, 11, 04, 05, 00, 0f, 11, 02, 0c, 00, 13, 15, 01, 0d, 00, 13, 0e, 02, 0d, 00, 13, 27, 03, 05, 00, 0f, 19, 01, 0c, 00, 13, 1d, 01, 0d, 00, 17, 1d, 04, 0d, 00, 13, 1e, 02, 0d, 00, 17, 1e, 01, 14, 00, 1b, 00, 01, 15, 00, 1b, 1e, 02, 15, 00, 1b, 21, 04, 0d, 00, 13, 22, 03, 09, 00, 19, 25, 02, 05, 00, 0f, 25, 03, 09, 00, 22, 00, 02, 05, 00, 0f, 00, 03, 09, 00, 2c, 00, 02, 01, 00, 02]
 Number of files: 1
 - file 0 => $DIR/issue-84561.rs
 Number of expressions: 10
-- expression 0 operands: lhs = Counter(3), rhs = Counter(4)
-- expression 1 operands: lhs = Counter(3), rhs = Counter(5)
-- expression 2 operands: lhs = Counter(3), rhs = Counter(6)
-- expression 3 operands: lhs = Counter(7), rhs = Counter(8)
-- expression 4 operands: lhs = Counter(10), rhs = Counter(11)
-- expression 5 operands: lhs = Counter(9), rhs = Counter(10)
-- expression 6 operands: lhs = Counter(9), rhs = Counter(10)
-- expression 7 operands: lhs = Counter(9), rhs = Counter(10)
-- expression 8 operands: lhs = Expression(9, Add), rhs = Counter(12)
-- expression 9 operands: lhs = Counter(10), rhs = Counter(11)
+- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
+- expression 1 operands: lhs = Counter(0), rhs = Counter(2)
+- expression 2 operands: lhs = Counter(0), rhs = Counter(3)
+- expression 3 operands: lhs = Counter(4), rhs = Counter(5)
+- expression 4 operands: lhs = Counter(7), rhs = Counter(8)
+- expression 5 operands: lhs = Counter(6), rhs = Counter(7)
+- expression 6 operands: lhs = Counter(6), rhs = Counter(7)
+- expression 7 operands: lhs = Counter(6), rhs = Counter(7)
+- expression 8 operands: lhs = Expression(9, Add), rhs = Counter(9)
+- expression 9 operands: lhs = Counter(7), rhs = Counter(8)
 Number of file 0 mappings: 77
 - Code(Counter(0)) at (prev + 8, 1) to (start + 0, 11)
 - Code(Counter(0)) at (prev + 1, 9) to (start + 0, 16)
@@ -94,85 +94,85 @@ Number of file 0 mappings: 77
 - Code(Counter(0)) at (prev + 1, 9) to (start + 0, 12)
 - Code(Counter(0)) at (prev + 0, 15) to (start + 0, 21)
 - Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(1)) at (prev + 1, 9) to (start + 0, 12)
-- Code(Counter(1)) at (prev + 0, 15) to (start + 0, 21)
-- Code(Counter(1)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(2)) at (prev + 1, 5) to (start + 0, 13)
-- Code(Counter(2)) at (prev + 0, 14) to (start + 0, 20)
-- Code(Counter(2)) at (prev + 1, 5) to (start + 0, 13)
-- Code(Counter(2)) at (prev + 0, 14) to (start + 0, 20)
-- Code(Counter(2)) at (prev + 1, 5) to (start + 0, 13)
-- Code(Counter(2)) at (prev + 0, 14) to (start + 0, 20)
-- Code(Counter(2)) at (prev + 2, 5) to (start + 0, 15)
-- Code(Counter(2)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(2)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(2)) at (prev + 1, 9) to (start + 0, 12)
-- Code(Counter(2)) at (prev + 0, 15) to (start + 0, 21)
-- Code(Counter(2)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(3)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(3)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 9) to (start + 0, 12)
+- Code(Counter(0)) at (prev + 0, 15) to (start + 0, 21)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 2, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 9) to (start + 0, 12)
+- Code(Counter(0)) at (prev + 0, 15) to (start + 0, 21)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 48)
-- Code(Counter(3)) at (prev + 1, 5) to (start + 0, 13)
-- Code(Counter(3)) at (prev + 0, 14) to (start + 0, 20)
-- Code(Counter(3)) at (prev + 1, 5) to (start + 0, 13)
-- Code(Counter(3)) at (prev + 0, 14) to (start + 0, 20)
-- Code(Counter(3)) at (prev + 2, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 13)
+- Code(Counter(0)) at (prev + 0, 14) to (start + 0, 20)
+- Code(Counter(0)) at (prev + 2, 5) to (start + 0, 15)
 - Code(Zero) at (prev + 0, 32) to (start + 0, 36)
 - Code(Zero) at (prev + 0, 41) to (start + 0, 48)
 - Code(Zero) at (prev + 0, 51) to (start + 0, 65)
 - Code(Zero) at (prev + 0, 75) to (start + 0, 90)
-- Code(Counter(3)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
 - Code(Zero) at (prev + 5, 9) to (start + 0, 13)
 - Code(Zero) at (prev + 3, 9) to (start + 0, 16)
 - Code(Zero) at (prev + 2, 13) to (start + 0, 27)
 - Code(Zero) at (prev + 2, 13) to (start + 0, 28)
-- Code(Counter(3)) at (prev + 4, 9) to (start + 0, 16)
-- Code(Counter(3)) at (prev + 0, 19) to (start + 0, 46)
-- Code(Counter(3)) at (prev + 2, 5) to (start + 0, 15)
-- Code(Counter(3)) at (prev + 4, 5) to (start + 0, 15)
-- Code(Counter(3)) at (prev + 4, 5) to (start + 0, 15)
-- Code(Counter(3)) at (prev + 4, 9) to (start + 0, 12)
-- Code(Counter(3)) at (prev + 0, 15) to (start + 0, 21)
-- Code(Counter(3)) at (prev + 1, 5) to (start + 0, 15)
-- Code(Counter(3)) at (prev + 4, 8) to (start + 0, 15)
-- Code(Counter(4)) at (prev + 1, 9) to (start + 0, 19)
+- Code(Counter(0)) at (prev + 4, 9) to (start + 0, 16)
+- Code(Counter(0)) at (prev + 0, 19) to (start + 0, 46)
+- Code(Counter(0)) at (prev + 2, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 4, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 4, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 4, 9) to (start + 0, 12)
+- Code(Counter(0)) at (prev + 0, 15) to (start + 0, 21)
+- Code(Counter(0)) at (prev + 1, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 4, 8) to (start + 0, 15)
+- Code(Counter(1)) at (prev + 1, 9) to (start + 0, 19)
 - Code(Expression(0, Sub)) at (prev + 5, 9) to (start + 0, 19)
-    = (c3 - c4)
-- Code(Counter(3)) at (prev + 5, 8) to (start + 0, 15)
-- Code(Counter(5)) at (prev + 1, 9) to (start + 0, 19)
+    = (c0 - c1)
+- Code(Counter(0)) at (prev + 5, 8) to (start + 0, 15)
+- Code(Counter(2)) at (prev + 1, 9) to (start + 0, 19)
 - Code(Zero) at (prev + 3, 13) to (start + 0, 29)
 - Code(Expression(1, Sub)) at (prev + 3, 9) to (start + 0, 19)
-    = (c3 - c5)
+    = (c0 - c2)
 - Code(Zero) at (prev + 3, 13) to (start + 0, 29)
-- Code(Counter(3)) at (prev + 3, 5) to (start + 0, 15)
-- Code(Counter(3)) at (prev + 1, 12) to (start + 0, 19)
-- Code(Counter(6)) at (prev + 1, 13) to (start + 0, 19)
+- Code(Counter(0)) at (prev + 3, 5) to (start + 0, 15)
+- Code(Counter(0)) at (prev + 1, 12) to (start + 0, 19)
+- Code(Counter(3)) at (prev + 1, 13) to (start + 0, 19)
 - Code(Expression(2, Sub)) at (prev + 2, 13) to (start + 0, 19)
-    = (c3 - c6)
-- Code(Counter(7)) at (prev + 4, 5) to (start + 0, 15)
-- Code(Counter(7)) at (prev + 2, 12) to (start + 0, 19)
-- Code(Counter(8)) at (prev + 1, 13) to (start + 0, 19)
+    = (c0 - c3)
+- Code(Counter(4)) at (prev + 4, 5) to (start + 0, 15)
+- Code(Counter(4)) at (prev + 2, 12) to (start + 0, 19)
+- Code(Counter(5)) at (prev + 1, 13) to (start + 0, 19)
 - Code(Expression(3, Sub)) at (prev + 2, 13) to (start + 0, 19)
-    = (c7 - c8)
+    = (c4 - c5)
 - Code(Expression(9, Add)) at (prev + 3, 5) to (start + 0, 15)
-    = (c10 + c11)
-- Code(Counter(9)) at (prev + 1, 12) to (start + 0, 19)
-- Code(Counter(10)) at (prev + 1, 13) to (start + 0, 23)
-- Code(Counter(10)) at (prev + 4, 13) to (start + 0, 19)
+    = (c7 + c8)
+- Code(Counter(6)) at (prev + 1, 12) to (start + 0, 19)
+- Code(Counter(7)) at (prev + 1, 13) to (start + 0, 23)
+- Code(Counter(7)) at (prev + 4, 13) to (start + 0, 19)
 - Code(Expression(7, Sub)) at (prev + 2, 13) to (start + 0, 23)
-    = (c9 - c10)
+    = (c6 - c7)
 - Code(Expression(7, Sub)) at (prev + 1, 20) to (start + 0, 27)
-    = (c9 - c10)
+    = (c6 - c7)
 - Code(Zero) at (prev + 1, 21) to (start + 0, 27)
 - Code(Expression(7, Sub)) at (prev + 2, 21) to (start + 0, 27)
-    = (c9 - c10)
-- Code(Counter(11)) at (prev + 4, 13) to (start + 0, 19)
+    = (c6 - c7)
+- Code(Counter(8)) at (prev + 4, 13) to (start + 0, 19)
 - Code(Expression(8, Sub)) at (prev + 3, 9) to (start + 0, 25)
-    = ((c10 + c11) - c12)
-- Code(Counter(12)) at (prev + 2, 5) to (start + 0, 15)
-- Code(Counter(12)) at (prev + 3, 9) to (start + 0, 34)
+    = ((c7 + c8) - c9)
+- Code(Counter(9)) at (prev + 2, 5) to (start + 0, 15)
+- Code(Counter(9)) at (prev + 3, 9) to (start + 0, 34)
 - Code(Zero) at (prev + 2, 5) to (start + 0, 15)
 - Code(Zero) at (prev + 3, 9) to (start + 0, 44)
 - Code(Zero) at (prev + 2, 1) to (start + 0, 2)
-Highest counter ID seen: c12
+Highest counter ID seen: c9
 
diff --git a/tests/rustdoc-gui/search-title.goml b/tests/rustdoc-gui/search-title.goml
index 83321a05f2b..5808ed845a3 100644
--- a/tests/rustdoc-gui/search-title.goml
+++ b/tests/rustdoc-gui/search-title.goml
@@ -20,3 +20,15 @@ assert-document-property: {"title": '"another one" Search - Rust'}
 press-key: "Escape"
 
 assert-document-property: {"title": |title|}
+
+// check that all.html does it correctly, too.
+go-to: "file://" + |DOC_PATH| + "/test_docs/all.html"
+assert-document-property: {"title": "List of all items in this crate"}
+call-function: ("perform-search", {"query": "verify"})
+assert-document-property: {"title": '"verify" Search - Rust'}
+
+// check that index.html does it correctly, too.
+go-to: "file://" + |DOC_PATH| + "/index.html"
+assert-document-property: {"title": "Index of crates"}
+call-function: ("perform-search", {"query": "verify"})
+assert-document-property: {"title": '"verify" Search - Rust'}
diff --git a/tests/rustdoc-gui/src/test_docs/lib.rs b/tests/rustdoc-gui/src/test_docs/lib.rs
index de7c89a9fa3..c0771583ab6 100644
--- a/tests/rustdoc-gui/src/test_docs/lib.rs
+++ b/tests/rustdoc-gui/src/test_docs/lib.rs
@@ -1,3 +1,4 @@
+//@ compile-flags: --enable-index-page -Z unstable-options
 //! The point of this crate is to be able to have enough different "kinds" of
 //! documentation generated so we can test each different features.
 #![doc(html_playground_url="https://play.rust-lang.org/")]
diff --git a/tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.rs b/tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.rs
new file mode 100644
index 00000000000..c4527c626d9
--- /dev/null
+++ b/tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.rs
@@ -0,0 +1,21 @@
+// Ensure that no warning is emitted if the disambiguator is used for type alias.
+// Regression test for <https://github.com/rust-lang/rust/issues/146855>.
+
+#![deny(rustdoc::broken_intra_doc_links)]
+
+pub struct Foo;
+
+#[allow(non_camel_case_types)]
+pub type f32 = Foo;
+
+/// This function returns [`f32`].
+//~^ ERROR: `f32` is both a type alias and a primitive type
+//~| HELP: to link to the type alias, prefix with `tyalias@`
+//~| HELP: to link to the primitive type, prefix with `prim@`
+pub fn my_fn() -> f32 {}
+
+/// This function returns [type@f32].
+//~^ ERROR: `f32` is both a type alias and a primitive type
+//~| HELP: to link to the type alias, prefix with `tyalias@`
+//~| HELP: to link to the primitive type, prefix with `prim@`
+pub fn my_fn2() -> f32 {}
diff --git a/tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.stderr b/tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.stderr
new file mode 100644
index 00000000000..c99e7d1d104
--- /dev/null
+++ b/tests/rustdoc-ui/intra-doc/type-alias-primitive-suggestion.stderr
@@ -0,0 +1,39 @@
+error: `f32` is both a type alias and a primitive type
+  --> $DIR/type-alias-primitive-suggestion.rs:11:29
+   |
+LL | /// This function returns [`f32`].
+   |                             ^^^ ambiguous link
+   |
+note: the lint level is defined here
+  --> $DIR/type-alias-primitive-suggestion.rs:4:9
+   |
+LL | #![deny(rustdoc::broken_intra_doc_links)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+help: to link to the type alias, prefix with `tyalias@`
+   |
+LL | /// This function returns [`tyalias@f32`].
+   |                             ++++++++
+help: to link to the primitive type, prefix with `prim@`
+   |
+LL | /// This function returns [`prim@f32`].
+   |                             +++++
+
+error: `f32` is both a type alias and a primitive type
+  --> $DIR/type-alias-primitive-suggestion.rs:17:28
+   |
+LL | /// This function returns [type@f32].
+   |                            ^^^^^^^^ ambiguous link
+   |
+help: to link to the type alias, prefix with `tyalias@`
+   |
+LL - /// This function returns [type@f32].
+LL + /// This function returns [tyalias@f32].
+   |
+help: to link to the primitive type, prefix with `prim@`
+   |
+LL - /// This function returns [type@f32].
+LL + /// This function returns [prim@f32].
+   |
+
+error: aborting due to 2 previous errors
+
diff --git a/tests/rustdoc-ui/intra-doc/type-alias-primitive.rs b/tests/rustdoc-ui/intra-doc/type-alias-primitive.rs
new file mode 100644
index 00000000000..62b2c83eeca
--- /dev/null
+++ b/tests/rustdoc-ui/intra-doc/type-alias-primitive.rs
@@ -0,0 +1,14 @@
+// Ensure that no warning is emitted if the disambiguator is used for type alias.
+// Regression test for <https://github.com/rust-lang/rust/issues/146855>.
+
+//@ check-pass
+
+#![deny(rustdoc::broken_intra_doc_links)]
+
+pub struct Foo;
+
+#[allow(non_camel_case_types)]
+pub type f32 = Foo;
+
+/// This function returns [`tyalias@f32`] and not [`prim@f32`].
+pub fn my_fn() -> f32 {}
diff --git a/tests/rustdoc/intra-doc/type-alias-primitive.rs b/tests/rustdoc/intra-doc/type-alias-primitive.rs
new file mode 100644
index 00000000000..7504166cbcc
--- /dev/null
+++ b/tests/rustdoc/intra-doc/type-alias-primitive.rs
@@ -0,0 +1,21 @@
+// Ensure that no warning is emitted if the disambiguator is used for type alias.
+// Regression test for <https://github.com/rust-lang/rust/issues/146855>.
+
+#![crate_name = "foo"]
+#![deny(rustdoc::broken_intra_doc_links)]
+
+pub struct Foo;
+
+#[allow(non_camel_case_types)]
+pub type f32 = Foo;
+
+/// This function returns [`tyalias@f32`] and not [bla][`prim@f32`].
+//@ has 'foo/fn.my_fn.html'
+//@ has - '//a[@href="type.f32.html"]' "f32"
+//@ has - '//a[@href="{{channel}}/std/primitive.f32.html"]' "bla"
+pub fn my_fn() -> f32 { 0. }
+
+/// This function returns [`typealias@f32`].
+//@ has 'foo/fn.my_other_fn.html'
+//@ has - '//a[@href="type.f32.html"]' "f32"
+pub fn my_other_fn() -> f32 { 0. }
diff --git a/tests/ui/array-slice-vec/box-of-array-of-drop-1.rs b/tests/ui/array-slice-vec/box-of-array-of-drop-1.rs
index c7c05946c4c..5f4e381c983 100644
--- a/tests/ui/array-slice-vec/box-of-array-of-drop-1.rs
+++ b/tests/ui/array-slice-vec/box-of-array-of-drop-1.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 #![allow(overflowing_literals)]
 
diff --git a/tests/ui/array-slice-vec/box-of-array-of-drop-2.rs b/tests/ui/array-slice-vec/box-of-array-of-drop-2.rs
index 98175a26ec0..ea37d3e7212 100644
--- a/tests/ui/array-slice-vec/box-of-array-of-drop-2.rs
+++ b/tests/ui/array-slice-vec/box-of-array-of-drop-2.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 #![allow(overflowing_literals)]
 
diff --git a/tests/ui/array-slice-vec/nested-vec-3.rs b/tests/ui/array-slice-vec/nested-vec-3.rs
index 51975743742..e3c04ed6f6b 100644
--- a/tests/ui/array-slice-vec/nested-vec-3.rs
+++ b/tests/ui/array-slice-vec/nested-vec-3.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 #![allow(overflowing_literals)]
 
diff --git a/tests/ui/array-slice-vec/slice-panic-1.rs b/tests/ui/array-slice-vec/slice-panic-1.rs
index a745dff96af..d7c1098fa2b 100644
--- a/tests/ui/array-slice-vec/slice-panic-1.rs
+++ b/tests/ui/array-slice-vec/slice-panic-1.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 // Test that if a slicing expr[..] fails, the correct cleanups happen.
 
diff --git a/tests/ui/array-slice-vec/slice-panic-2.rs b/tests/ui/array-slice-vec/slice-panic-2.rs
index 483a4cbe245..157e716a95d 100644
--- a/tests/ui/array-slice-vec/slice-panic-2.rs
+++ b/tests/ui/array-slice-vec/slice-panic-2.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 // Test that if a slicing expr[..] fails, the correct cleanups happen.
 
diff --git a/tests/ui/asm/global-asm-isnt-really-a-mir-body.rs b/tests/ui/asm/global-asm-isnt-really-a-mir-body.rs
index aef25d057d4..94dab4235e0 100644
--- a/tests/ui/asm/global-asm-isnt-really-a-mir-body.rs
+++ b/tests/ui/asm/global-asm-isnt-really-a-mir-body.rs
@@ -18,6 +18,7 @@
 
 //@ build-pass
 //@ needs-asm-support
+//@ ignore-backends: gcc
 
 use std::arch::global_asm;
 
diff --git a/tests/ui/asm/x86_64/goto.rs b/tests/ui/asm/x86_64/goto.rs
index 00a8e588f96..c1dbce0d1c9 100644
--- a/tests/ui/asm/x86_64/goto.rs
+++ b/tests/ui/asm/x86_64/goto.rs
@@ -1,6 +1,7 @@
 //@ only-x86_64
 //@ run-pass
 //@ needs-asm-support
+//@ ignore-backends: gcc
 
 #![deny(unreachable_code)]
 #![feature(asm_goto_with_outputs)]
diff --git a/tests/ui/asm/x86_64/goto.stderr b/tests/ui/asm/x86_64/goto.stderr
index 78b726b3f3d..f8f09f32f6c 100644
--- a/tests/ui/asm/x86_64/goto.stderr
+++ b/tests/ui/asm/x86_64/goto.stderr
@@ -1,5 +1,5 @@
 warning: unreachable statement
-  --> $DIR/goto.rs:143:9
+  --> $DIR/goto.rs:144:9
    |
 LL | /         asm!(
 LL | |             "jmp {}",
@@ -13,7 +13,7 @@ LL |           unreachable!();
    |           ^^^^^^^^^^^^^^ unreachable statement
    |
 note: the lint level is defined here
-  --> $DIR/goto.rs:133:8
+  --> $DIR/goto.rs:134:8
    |
 LL | #[warn(unreachable_code)]
    |        ^^^^^^^^^^^^^^^^
diff --git a/tests/ui/asm/x86_64/srcloc.rs b/tests/ui/asm/x86_64/srcloc.rs
index 2938bafe5e7..f4ffa8c5c3b 100644
--- a/tests/ui/asm/x86_64/srcloc.rs
+++ b/tests/ui/asm/x86_64/srcloc.rs
@@ -1,6 +1,7 @@
 //@ only-x86_64
 //@ build-fail
 //@ compile-flags: -Ccodegen-units=1
+//@ ignore-backends: gcc
 
 use std::arch::asm;
 
diff --git a/tests/ui/asm/x86_64/srcloc.stderr b/tests/ui/asm/x86_64/srcloc.stderr
index bb4e855163d..b2079120ec0 100644
--- a/tests/ui/asm/x86_64/srcloc.stderr
+++ b/tests/ui/asm/x86_64/srcloc.stderr
@@ -1,5 +1,5 @@
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:11:15
+  --> $DIR/srcloc.rs:12:15
    |
 LL |         asm!("invalid_instruction");
    |               ^^^^^^^^^^^^^^^^^^^
@@ -11,7 +11,7 @@ LL |     invalid_instruction
    |     ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:15:13
+  --> $DIR/srcloc.rs:16:13
    |
 LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
@@ -23,7 +23,7 @@ LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:20:13
+  --> $DIR/srcloc.rs:21:13
    |
 LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
@@ -35,7 +35,7 @@ LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:26:13
+  --> $DIR/srcloc.rs:27:13
    |
 LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
@@ -47,7 +47,7 @@ LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:33:13
+  --> $DIR/srcloc.rs:34:13
    |
 LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
@@ -59,7 +59,7 @@ LL |             invalid_instruction
    |             ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:38:14
+  --> $DIR/srcloc.rs:39:14
    |
 LL |         asm!(concat!("invalid", "_", "instruction"));
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -71,7 +71,7 @@ LL |     invalid_instruction
    |     ^^^^^^^^^^^^^^^^^^^
 
 warning: scale factor without index register is ignored
-  --> $DIR/srcloc.rs:41:15
+  --> $DIR/srcloc.rs:42:15
    |
 LL |         asm!("movaps %xmm3, (%esi, 2)", options(att_syntax));
    |               ^^^^^^^^^^^^^^^^^^^^^^^
@@ -83,7 +83,7 @@ LL |     movaps %xmm3, (%esi, 2)
    |                          ^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:45:14
+  --> $DIR/srcloc.rs:46:14
    |
 LL |             "invalid_instruction",
    |              ^^^^^^^^^^^^^^^^^^^
@@ -95,7 +95,7 @@ LL |     invalid_instruction
    |     ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:51:14
+  --> $DIR/srcloc.rs:52:14
    |
 LL |             "invalid_instruction",
    |              ^^^^^^^^^^^^^^^^^^^
@@ -107,7 +107,7 @@ LL | invalid_instruction
    | ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:58:14
+  --> $DIR/srcloc.rs:59:14
    |
 LL |             "invalid_instruction",
    |              ^^^^^^^^^^^^^^^^^^^
@@ -119,7 +119,7 @@ LL | invalid_instruction
    | ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:65:13
+  --> $DIR/srcloc.rs:66:13
    |
 LL |             concat!("invalid", "_", "instruction"),
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -131,7 +131,7 @@ LL | invalid_instruction
    | ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:72:13
+  --> $DIR/srcloc.rs:73:13
    |
 LL |             concat!("invalid", "_", "instruction"),
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -143,7 +143,7 @@ LL | invalid_instruction
    | ^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction1'
-  --> $DIR/srcloc.rs:79:14
+  --> $DIR/srcloc.rs:80:14
    |
 LL |             "invalid_instruction1",
    |              ^^^^^^^^^^^^^^^^^^^^
@@ -155,7 +155,7 @@ LL |     invalid_instruction1
    |     ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction2'
-  --> $DIR/srcloc.rs:80:14
+  --> $DIR/srcloc.rs:81:14
    |
 LL |             "invalid_instruction2",
    |              ^^^^^^^^^^^^^^^^^^^^
@@ -167,7 +167,7 @@ LL | invalid_instruction2
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction1'
-  --> $DIR/srcloc.rs:86:13
+  --> $DIR/srcloc.rs:87:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction1", "\n",
@@ -182,7 +182,7 @@ LL |     invalid_instruction1
    |     ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction2'
-  --> $DIR/srcloc.rs:86:13
+  --> $DIR/srcloc.rs:87:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction1", "\n",
@@ -197,7 +197,7 @@ LL | invalid_instruction2
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction1'
-  --> $DIR/srcloc.rs:95:13
+  --> $DIR/srcloc.rs:96:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction1", "\n",
@@ -212,7 +212,7 @@ LL |     invalid_instruction1
    |     ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction2'
-  --> $DIR/srcloc.rs:95:13
+  --> $DIR/srcloc.rs:96:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction1", "\n",
@@ -227,7 +227,7 @@ LL | invalid_instruction2
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction3'
-  --> $DIR/srcloc.rs:99:13
+  --> $DIR/srcloc.rs:100:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction3", "\n",
@@ -242,7 +242,7 @@ LL | invalid_instruction3
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction4'
-  --> $DIR/srcloc.rs:99:13
+  --> $DIR/srcloc.rs:100:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction3", "\n",
@@ -257,7 +257,7 @@ LL | invalid_instruction4
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction1'
-  --> $DIR/srcloc.rs:110:13
+  --> $DIR/srcloc.rs:111:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction1", "\n",
@@ -272,7 +272,7 @@ LL |     invalid_instruction1
    |     ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction2'
-  --> $DIR/srcloc.rs:110:13
+  --> $DIR/srcloc.rs:111:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction1", "\n",
@@ -287,7 +287,7 @@ LL | invalid_instruction2
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction3'
-  --> $DIR/srcloc.rs:114:13
+  --> $DIR/srcloc.rs:115:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction3", "\n",
@@ -302,7 +302,7 @@ LL | invalid_instruction3
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction4'
-  --> $DIR/srcloc.rs:114:13
+  --> $DIR/srcloc.rs:115:13
    |
 LL | /             concat!(
 LL | |                 "invalid", "_", "instruction3", "\n",
@@ -317,7 +317,7 @@ LL | invalid_instruction4
    | ^^^^^^^^^^^^^^^^^^^^
 
 error: invalid instruction mnemonic 'invalid_instruction'
-  --> $DIR/srcloc.rs:127:14
+  --> $DIR/srcloc.rs:128:14
    |
 LL |             "invalid_instruction"
    |              ^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/attributes/fn-align-dyn.rs b/tests/ui/attributes/fn-align-dyn.rs
index 3778c75a2ca..91e2dab65a3 100644
--- a/tests/ui/attributes/fn-align-dyn.rs
+++ b/tests/ui/attributes/fn-align-dyn.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ ignore-wasm32 aligning functions is not currently supported on wasm (#143368)
+//@ ignore-backends: gcc
 
 // FIXME(#82232, #143834): temporarily renamed to mitigate `#[align]` nameres ambiguity
 #![feature(rustc_attrs)]
diff --git a/tests/ui/attributes/main-removed-2/main.rs b/tests/ui/attributes/main-removed-2/main.rs
index 53696d68ced..21a05dc4b40 100644
--- a/tests/ui/attributes/main-removed-2/main.rs
+++ b/tests/ui/attributes/main-removed-2/main.rs
@@ -2,6 +2,7 @@
 //@ proc-macro: tokyo.rs
 //@ compile-flags:--extern tokyo
 //@ edition:2021
+//@ ignore-backends: gcc
 
 use tokyo::main;
 
diff --git a/tests/ui/attributes/malformed-attrs.rs b/tests/ui/attributes/malformed-attrs.rs
index e30479b03b1..820484aa015 100644
--- a/tests/ui/attributes/malformed-attrs.rs
+++ b/tests/ui/attributes/malformed-attrs.rs
@@ -185,8 +185,7 @@ extern "C" {
 #[forbid]
 //~^ ERROR malformed
 #[debugger_visualizer]
-//~^ ERROR invalid argument
-//~| ERROR malformed `debugger_visualizer` attribute input
+//~^ ERROR malformed `debugger_visualizer` attribute input
 #[automatically_derived = 18]
 //~^ ERROR malformed
 mod yooo {
diff --git a/tests/ui/attributes/malformed-attrs.stderr b/tests/ui/attributes/malformed-attrs.stderr
index 246029ecf80..70ab3fb13c4 100644
--- a/tests/ui/attributes/malformed-attrs.stderr
+++ b/tests/ui/attributes/malformed-attrs.stderr
@@ -22,7 +22,7 @@ LL | #[cfg_attr(condition, attribute, other_attribute, ...)]
    |           ++++++++++++++++++++++++++++++++++++++++++++
 
 error[E0463]: can't find crate for `wloop`
-  --> $DIR/malformed-attrs.rs:210:1
+  --> $DIR/malformed-attrs.rs:209:1
    |
 LL | extern crate wloop;
    | ^^^^^^^^^^^^^^^^^^^ can't find crate
@@ -156,22 +156,14 @@ LL | #[forbid(lint1, lint2, ...)]
 LL | #[forbid(lint1, lint2, lint3, reason = "...")]
    |         +++++++++++++++++++++++++++++++++++++
 
-error: malformed `debugger_visualizer` attribute input
-  --> $DIR/malformed-attrs.rs:187:1
-   |
-LL | #[debugger_visualizer]
-   | ^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[debugger_visualizer(natvis_file = "...", gdb_script_file = "...")]`
-   |
-   = note: for more information, visit <https://doc.rust-lang.org/reference/attributes/debugger.html#the-debugger_visualizer-attribute>
-
 error: malformed `thread_local` attribute input
-  --> $DIR/malformed-attrs.rs:202:1
+  --> $DIR/malformed-attrs.rs:201:1
    |
 LL | #[thread_local()]
    | ^^^^^^^^^^^^^^^^^ help: must be of the form: `#[thread_local]`
 
 error: malformed `no_link` attribute input
-  --> $DIR/malformed-attrs.rs:206:1
+  --> $DIR/malformed-attrs.rs:205:1
    |
 LL | #[no_link()]
    | ^^^^^^^^^^^^ help: must be of the form: `#[no_link]`
@@ -197,7 +189,7 @@ LL | #[proc_macro_derive]
    | ^^^^^^^^^^^^^^^^^^^^
 
 error[E0658]: allow_internal_unsafe side-steps the unsafe_code lint
-  --> $DIR/malformed-attrs.rs:215:1
+  --> $DIR/malformed-attrs.rs:214:1
    |
 LL | #[allow_internal_unsafe = 1]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -226,16 +218,6 @@ LL | #[doc]
    = note: for more information, see issue #57571 <https://github.com/rust-lang/rust/issues/57571>
    = note: for more information, visit <https://doc.rust-lang.org/rustdoc/write-documentation/the-doc-attribute.html>
 
-error: invalid argument
-  --> $DIR/malformed-attrs.rs:187:1
-   |
-LL | #[debugger_visualizer]
-   | ^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: expected: `natvis_file = "..."`
-   = note: OR
-   = note: expected: `gdb_script_file = "..."`
-
 error[E0539]: malformed `export_name` attribute input
   --> $DIR/malformed-attrs.rs:29:1
    |
@@ -685,8 +667,19 @@ LL |     #[linkage = "external"]
    |               ++++++++++++
    = and 5 other candidates
 
+error[E0539]: malformed `debugger_visualizer` attribute input
+  --> $DIR/malformed-attrs.rs:187:1
+   |
+LL | #[debugger_visualizer]
+   | ^^^^^^^^^^^^^^^^^^^^^^
+   | |
+   | expected this to be a list
+   | help: must be of the form: `#[debugger_visualizer(natvis_file = "...", gdb_script_file = "...")]`
+   |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/attributes/debugger.html#the-debugger_visualizer-attribute>
+
 error[E0565]: malformed `automatically_derived` attribute input
-  --> $DIR/malformed-attrs.rs:190:1
+  --> $DIR/malformed-attrs.rs:189:1
    |
 LL | #[automatically_derived = 18]
    | ^^^^^^^^^^^^^^^^^^^^^^^^----^
@@ -695,7 +688,7 @@ LL | #[automatically_derived = 18]
    | help: must be of the form: `#[automatically_derived]`
 
 error[E0565]: malformed `non_exhaustive` attribute input
-  --> $DIR/malformed-attrs.rs:196:1
+  --> $DIR/malformed-attrs.rs:195:1
    |
 LL | #[non_exhaustive = 1]
    | ^^^^^^^^^^^^^^^^^---^
@@ -704,19 +697,19 @@ LL | #[non_exhaustive = 1]
    | help: must be of the form: `#[non_exhaustive]`
 
 error: valid forms for the attribute are `#[macro_use(name1, name2, ...)]` and `#[macro_use]`
-  --> $DIR/malformed-attrs.rs:208:1
+  --> $DIR/malformed-attrs.rs:207:1
    |
 LL | #[macro_use = 1]
    | ^^^^^^^^^^^^^^^^
 
 error: valid forms for the attribute are `#![macro_export(local_inner_macros)]` and `#![macro_export]`
-  --> $DIR/malformed-attrs.rs:213:1
+  --> $DIR/malformed-attrs.rs:212:1
    |
 LL | #[macro_export = 18]
    | ^^^^^^^^^^^^^^^^^^^^
 
 error[E0565]: malformed `allow_internal_unsafe` attribute input
-  --> $DIR/malformed-attrs.rs:215:1
+  --> $DIR/malformed-attrs.rs:214:1
    |
 LL | #[allow_internal_unsafe = 1]
    | ^^^^^^^^^^^^^^^^^^^^^^^^---^
@@ -800,7 +793,7 @@ LL | #[ignore()]
    = note: for more information, see issue #57571 <https://github.com/rust-lang/rust/issues/57571>
 
 error: valid forms for the attribute are `#[ignore = "reason"]` and `#[ignore]`
-  --> $DIR/malformed-attrs.rs:222:1
+  --> $DIR/malformed-attrs.rs:221:1
    |
 LL | #[ignore = 1]
    | ^^^^^^^^^^^^^
@@ -819,7 +812,7 @@ LL |     #[coroutine = 63] || {}
    = note: expected unit type `()`
               found coroutine `{coroutine@$DIR/malformed-attrs.rs:110:23: 110:25}`
 
-error: aborting due to 77 previous errors; 3 warnings emitted
+error: aborting due to 76 previous errors; 3 warnings emitted
 
 Some errors have detailed explanations: E0308, E0463, E0539, E0565, E0658, E0805.
 For more information about an error, try `rustc --explain E0308`.
@@ -871,7 +864,7 @@ LL | #[ignore()]
 
 Future breakage diagnostic:
 error: valid forms for the attribute are `#[ignore = "reason"]` and `#[ignore]`
-  --> $DIR/malformed-attrs.rs:222:1
+  --> $DIR/malformed-attrs.rs:221:1
    |
 LL | #[ignore = 1]
    | ^^^^^^^^^^^^^
diff --git a/tests/ui/backtrace/synchronized-panic-handler.rs b/tests/ui/backtrace/synchronized-panic-handler.rs
index 29431ae3c45..ef7cc1faec8 100644
--- a/tests/ui/backtrace/synchronized-panic-handler.rs
+++ b/tests/ui/backtrace/synchronized-panic-handler.rs
@@ -4,6 +4,7 @@
 //@ exec-env:RUST_BACKTRACE=0
 //@ needs-threads
 //@ needs-unwind
+//@ ignore-backends: gcc
 use std::thread;
 const PANIC_MESSAGE: &str = "oops oh no woe is me";
 
diff --git a/tests/ui/backtrace/synchronized-panic-handler.run.stderr b/tests/ui/backtrace/synchronized-panic-handler.run.stderr
index c604d49c193..5296a0d39ff 100644
--- a/tests/ui/backtrace/synchronized-panic-handler.run.stderr
+++ b/tests/ui/backtrace/synchronized-panic-handler.run.stderr
@@ -1,7 +1,7 @@
 
-thread '<unnamed>' ($TID) panicked at $DIR/synchronized-panic-handler.rs:11:5:
+thread '<unnamed>' ($TID) panicked at $DIR/synchronized-panic-handler.rs:12:5:
 oops oh no woe is me
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
-thread '<unnamed>' ($TID) panicked at $DIR/synchronized-panic-handler.rs:11:5:
+thread '<unnamed>' ($TID) panicked at $DIR/synchronized-panic-handler.rs:12:5:
 oops oh no woe is me
diff --git a/tests/ui/box/unit/unwind-unique.rs b/tests/ui/box/unit/unwind-unique.rs
index 1da55c45ee9..ed549f50a74 100644
--- a/tests/ui/box/unit/unwind-unique.rs
+++ b/tests/ui/box/unit/unwind-unique.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 use std::thread;
 
diff --git a/tests/ui/c-variadic/inherent-method.rs b/tests/ui/c-variadic/inherent-method.rs
index 537bae7b3f0..c5256aaa1fe 100644
--- a/tests/ui/c-variadic/inherent-method.rs
+++ b/tests/ui/c-variadic/inherent-method.rs
@@ -1,4 +1,5 @@
 //@ run-pass
+//@ ignore-backends: gcc
 #![feature(c_variadic)]
 
 #[repr(transparent)]
diff --git a/tests/ui/c-variadic/trait-method.rs b/tests/ui/c-variadic/trait-method.rs
index 97da0706a3a..876a303f53b 100644
--- a/tests/ui/c-variadic/trait-method.rs
+++ b/tests/ui/c-variadic/trait-method.rs
@@ -1,4 +1,5 @@
 //@ run-pass
+//@ ignore-backends: gcc
 #![feature(c_variadic)]
 
 #[repr(transparent)]
diff --git a/tests/ui/c-variadic/valid.rs b/tests/ui/c-variadic/valid.rs
index 5a0b32026dc..8b42eb49329 100644
--- a/tests/ui/c-variadic/valid.rs
+++ b/tests/ui/c-variadic/valid.rs
@@ -1,4 +1,5 @@
 //@ run-pass
+//@ ignore-backends: gcc
 #![feature(c_variadic)]
 
 // In rust (and C23 and above) `...` can be the only argument.
diff --git a/tests/ui/cfg/assume-incomplete-release/assume-incomplete.rs b/tests/ui/cfg/assume-incomplete-release/assume-incomplete.rs
index cafb7389e29..2ca004d9a90 100644
--- a/tests/ui/cfg/assume-incomplete-release/assume-incomplete.rs
+++ b/tests/ui/cfg/assume-incomplete-release/assume-incomplete.rs
@@ -2,6 +2,7 @@
 //@ proc-macro: ver-cfg-rel.rs
 //@ revisions: assume no_assume
 //@ [assume]compile-flags: -Z assume-incomplete-release
+//@ ignore-backends: gcc
 
 #![feature(cfg_version)]
 
diff --git a/tests/ui/closures/deduce-signature/obligation-with-leaking-placeholders.next.stderr b/tests/ui/closures/deduce-signature/obligation-with-leaking-placeholders.next.stderr
index 3d667f12371..4bb9047b303 100644
--- a/tests/ui/closures/deduce-signature/obligation-with-leaking-placeholders.next.stderr
+++ b/tests/ui/closures/deduce-signature/obligation-with-leaking-placeholders.next.stderr
@@ -5,7 +5,7 @@ LL |     needs_foo(|x| {
    |                ^
 ...
 LL |         x.to_string();
-   |         - type must be known at this point
+   |           --------- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
diff --git a/tests/ui/codegen/issue-82833-slice-miscompile.rs b/tests/ui/codegen/issue-82833-slice-miscompile.rs
index 32eac923a63..e0cb8716629 100644
--- a/tests/ui/codegen/issue-82833-slice-miscompile.rs
+++ b/tests/ui/codegen/issue-82833-slice-miscompile.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ compile-flags: -Ccodegen-units=1 -Cllvm-args=--inline-threshold=0 -Clink-dead-code -Copt-level=0 -Cdebuginfo=2
+//@ ignore-backends: gcc
 
 // Make sure LLVM does not miscompile this.
 
diff --git a/tests/ui/codegen/llvm-args-invalid-flag.rs b/tests/ui/codegen/llvm-args-invalid-flag.rs
index a8fa55a220a..f88a7101abd 100644
--- a/tests/ui/codegen/llvm-args-invalid-flag.rs
+++ b/tests/ui/codegen/llvm-args-invalid-flag.rs
@@ -1,6 +1,7 @@
 //@ compile-flags: -Cllvm-args=-not-a-real-llvm-arg
 //@ normalize-stderr: "--help" -> "-help"
 //@ normalize-stderr: "\n(\n|.)*" -> ""
+//@ ignore-backends: gcc
 
 // I'm seeing "--help" locally, but "-help" in CI, so I'm normalizing it to just "-help".
 
diff --git a/tests/ui/codegen/remark-flag-functionality.rs b/tests/ui/codegen/remark-flag-functionality.rs
index 797c55ba830..4cfc5f5c8ec 100644
--- a/tests/ui/codegen/remark-flag-functionality.rs
+++ b/tests/ui/codegen/remark-flag-functionality.rs
@@ -17,6 +17,7 @@
 
 //@ dont-check-compiler-stderr
 //@ dont-require-annotations: NOTE
+//@ ignore-backends: gcc
 
 #[no_mangle]
 #[inline(never)]
diff --git a/tests/ui/codegen/virtual-function-elimination.rs b/tests/ui/codegen/virtual-function-elimination.rs
index 3cbeb1293e5..90fc86f95c5 100644
--- a/tests/ui/codegen/virtual-function-elimination.rs
+++ b/tests/ui/codegen/virtual-function-elimination.rs
@@ -2,6 +2,7 @@
 //@ compile-flags: -Zvirtual-function-elimination=true -Clto=true
 //@ only-x86_64
 //@ no-prefer-dynamic
+//@ ignore-backends: gcc
 
 // issue #123955
 pub fn test0() {
diff --git a/tests/ui/coroutine/copy-fast-path-query-cycle.rs b/tests/ui/coroutine/copy-fast-path-query-cycle.rs
new file mode 100644
index 00000000000..644cba0d47a
--- /dev/null
+++ b/tests/ui/coroutine/copy-fast-path-query-cycle.rs
@@ -0,0 +1,40 @@
+//@ edition: 2024
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+//@ check-pass
+
+// Regression test for #146813. We previously used a pseudo-canonical
+// query during HIR typeck which caused a query cycle when looking at the
+// witness of a coroutine.
+
+use std::future::Future;
+
+trait ConnectMiddleware {}
+
+trait ConnectHandler: Sized {
+    fn with<M>(self, _: M) -> impl ConnectHandler
+    where
+        M: ConnectMiddleware,
+    {
+        LayeredConnectHandler
+    }
+}
+
+struct LayeredConnectHandler;
+impl ConnectHandler for LayeredConnectHandler {}
+impl<F> ConnectHandler for F where F: FnOnce() {}
+
+impl<F, Fut> ConnectMiddleware for F
+where
+    F: FnOnce() -> Fut,
+    Fut: Future<Output = ()> + Send,
+{
+}
+
+pub async fn fails() {
+    { || {} }
+        .with(async || ())
+        .with(async || ())
+        .with(async || ());
+}
+fn main() {}
diff --git a/tests/ui/coroutine/gen_block_panic.rs b/tests/ui/coroutine/gen_block_panic.rs
index b6362d5046a..5417ed583e8 100644
--- a/tests/ui/coroutine/gen_block_panic.rs
+++ b/tests/ui/coroutine/gen_block_panic.rs
@@ -1,6 +1,7 @@
 //@ edition: 2024
 //@ run-pass
 //@ needs-unwind
+//@ ignore-backends: gcc
 #![feature(gen_blocks)]
 
 fn main() {
diff --git a/tests/ui/coroutine/gen_block_panic.stderr b/tests/ui/coroutine/gen_block_panic.stderr
index a43c9e03691..d0a146e7baf 100644
--- a/tests/ui/coroutine/gen_block_panic.stderr
+++ b/tests/ui/coroutine/gen_block_panic.stderr
@@ -1,5 +1,5 @@
 warning: unreachable statement
-  --> $DIR/gen_block_panic.rs:10:9
+  --> $DIR/gen_block_panic.rs:11:9
    |
 LL |         panic!("foo");
    |         ------------- any code following this expression is unreachable
diff --git a/tests/ui/delegation/fn-header-variadic.rs b/tests/ui/delegation/fn-header-variadic.rs
index 2c83d64d0b3..346c49f08e5 100644
--- a/tests/ui/delegation/fn-header-variadic.rs
+++ b/tests/ui/delegation/fn-header-variadic.rs
@@ -1,4 +1,5 @@
 //@ aux-crate:fn_header_aux=fn-header-aux.rs
+//@ ignore-backends: gcc
 
 #![feature(c_variadic)]
 #![feature(fn_delegation)]
diff --git a/tests/ui/delegation/fn-header-variadic.stderr b/tests/ui/delegation/fn-header-variadic.stderr
index 688a965fb4d..c2d7672939f 100644
--- a/tests/ui/delegation/fn-header-variadic.stderr
+++ b/tests/ui/delegation/fn-header-variadic.stderr
@@ -1,5 +1,5 @@
 error: delegation to C-variadic functions is not allowed
-  --> $DIR/fn-header-variadic.rs:11:17
+  --> $DIR/fn-header-variadic.rs:12:17
    |
 LL |     pub unsafe extern "C" fn variadic_fn(n: usize, mut args: ...) {}
    |     ------------------------------------------------------------- callee defined here
@@ -8,7 +8,7 @@ LL | reuse to_reuse::variadic_fn;
    |                 ^^^^^^^^^^^
 
 error: delegation to C-variadic functions is not allowed
-  --> $DIR/fn-header-variadic.rs:13:22
+  --> $DIR/fn-header-variadic.rs:14:22
    |
 LL | reuse fn_header_aux::variadic_fn_extern;
    |                      ^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/drop/drop-trait-enum.rs b/tests/ui/drop/drop-trait-enum.rs
index 5a88d959ec6..efb6b2a912a 100644
--- a/tests/ui/drop/drop-trait-enum.rs
+++ b/tests/ui/drop/drop-trait-enum.rs
@@ -4,6 +4,7 @@
 #![allow(unused_variables)]
 //@ needs-threads
 //@ needs-unwind
+//@ ignore-backends: gcc
 
 use std::thread;
 use std::sync::mpsc::{channel, Sender};
diff --git a/tests/ui/drop/terminate-in-initializer.rs b/tests/ui/drop/terminate-in-initializer.rs
index 24ec39fe096..5dd8fe43c71 100644
--- a/tests/ui/drop/terminate-in-initializer.rs
+++ b/tests/ui/drop/terminate-in-initializer.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 // Issue #787
 // Don't try to clean up uninitialized locals
diff --git a/tests/ui/explicit-tail-calls/callee_is_track_caller.rs b/tests/ui/explicit-tail-calls/callee_is_track_caller.rs
index b85b335844b..1246a3801fc 100644
--- a/tests/ui/explicit-tail-calls/callee_is_track_caller.rs
+++ b/tests/ui/explicit-tail-calls/callee_is_track_caller.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ ignore-pass
+//@ ignore-backends: gcc
 #![expect(incomplete_features)]
 #![feature(explicit_tail_calls)]
 
diff --git a/tests/ui/explicit-tail-calls/callee_is_track_caller.stderr b/tests/ui/explicit-tail-calls/callee_is_track_caller.stderr
index e1a251d156f..020a0542a57 100644
--- a/tests/ui/explicit-tail-calls/callee_is_track_caller.stderr
+++ b/tests/ui/explicit-tail-calls/callee_is_track_caller.stderr
@@ -1,5 +1,5 @@
 warning: tail calling a function marked with `#[track_caller]` has no special effect
-  --> $DIR/callee_is_track_caller.rs:7:12
+  --> $DIR/callee_is_track_caller.rs:8:12
    |
 LL |     become b(x);
    |            ^^^^
diff --git a/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.rs b/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.rs
index 33384de83eb..51688897b40 100644
--- a/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.rs
+++ b/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ ignore-pass
+//@ ignore-backends: gcc
 #![expect(incomplete_features)]
 #![feature(explicit_tail_calls)]
 
diff --git a/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.stderr b/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.stderr
index 5a1c40509ad..7b4c144acff 100644
--- a/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.stderr
+++ b/tests/ui/explicit-tail-calls/callee_is_track_caller_polymorphic.stderr
@@ -1,5 +1,5 @@
 warning: tail calling a function marked with `#[track_caller]` has no special effect
-  --> $DIR/callee_is_track_caller_polymorphic.rs:7:12
+  --> $DIR/callee_is_track_caller_polymorphic.rs:8:12
    |
 LL |     become T::f();
    |            ^^^^^^
diff --git a/tests/ui/explicit-tail-calls/drop-order.rs b/tests/ui/explicit-tail-calls/drop-order.rs
index 58e1afbdf0c..ff6e2f09f57 100644
--- a/tests/ui/explicit-tail-calls/drop-order.rs
+++ b/tests/ui/explicit-tail-calls/drop-order.rs
@@ -1,4 +1,5 @@
 //@ run-pass
+//@ ignore-backends: gcc
 #![expect(incomplete_features)]
 #![feature(explicit_tail_calls)]
 use std::cell::RefCell;
diff --git a/tests/ui/explicit-tail-calls/indexer.rs b/tests/ui/explicit-tail-calls/indexer.rs
index 5644506b2f5..c26d9774ce7 100644
--- a/tests/ui/explicit-tail-calls/indexer.rs
+++ b/tests/ui/explicit-tail-calls/indexer.rs
@@ -1,4 +1,5 @@
 //@ run-pass
+//@ ignore-backends: gcc
 // Indexing taken from
 // https://github.com/phi-go/rfcs/blob/guaranteed-tco/text%2F0000-explicit-tail-calls.md#tail-call-elimination
 // no other test has utilized the "function table"
diff --git a/tests/ui/explicit-tail-calls/recursion-etc.rs b/tests/ui/explicit-tail-calls/recursion-etc.rs
index 8c89ceb7869..c22401d2379 100644
--- a/tests/ui/explicit-tail-calls/recursion-etc.rs
+++ b/tests/ui/explicit-tail-calls/recursion-etc.rs
@@ -1,4 +1,5 @@
 //@ run-pass
+//@ ignore-backends: gcc
 #![expect(incomplete_features)]
 #![feature(explicit_tail_calls)]
 
diff --git a/tests/ui/extern/extern-types-field-offset.rs b/tests/ui/extern/extern-types-field-offset.rs
index 035f063cd50..7a5f36da209 100644
--- a/tests/ui/extern/extern-types-field-offset.rs
+++ b/tests/ui/extern/extern-types-field-offset.rs
@@ -2,6 +2,7 @@
 //@ check-run-results
 //@ exec-env:RUST_BACKTRACE=0
 //@ normalize-stderr: "(core/src/panicking\.rs):[0-9]+:[0-9]+" -> "$1:$$LINE:$$COL"
+//@ ignore-backends: gcc
 #![feature(extern_types)]
 
 extern "C" {
diff --git a/tests/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs b/tests/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs
index 1cd52b70315..4d0afa1cdfa 100644
--- a/tests/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs
+++ b/tests/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs
@@ -21,6 +21,7 @@
 //@[no]compile-flags: -C lto=no
 //@[thin]compile-flags: -C lto=thin
 //@[fat]compile-flags: -C lto=fat
+//@ ignore-backends: gcc
 
 #![feature(panic_internals)]
 
diff --git a/tests/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs b/tests/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs
index a44eb3828d0..1fc3409c1f9 100644
--- a/tests/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs
+++ b/tests/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs
@@ -48,6 +48,7 @@
 //@[fat1]compile-flags: -C opt-level=1 -C lto=fat
 //@[fat2]compile-flags: -C opt-level=2 -C lto=fat
 //@[fat3]compile-flags: -C opt-level=3 -C lto=fat
+//@ ignore-backends: gcc
 
 fn main() {
     use std::sync::atomic::{AtomicUsize, Ordering};
diff --git a/tests/ui/feature-gates/feature-gate-sanitize.stderr b/tests/ui/feature-gates/feature-gate-sanitize.stderr
index 513999636a9..59e8b69de2e 100644
--- a/tests/ui/feature-gates/feature-gate-sanitize.stderr
+++ b/tests/ui/feature-gates/feature-gate-sanitize.stderr
@@ -4,7 +4,7 @@ error[E0557]: feature has been removed
 LL | #![feature(no_sanitize)]
    |            ^^^^^^^^^^^ feature has been removed
    |
-   = note: removed in CURRENT_RUSTC_VERSION; see <https://github.com/rust-lang/rust/pull/142681> for more information
+   = note: removed in 1.91.0; see <https://github.com/rust-lang/rust/pull/142681> for more information
    = note: renamed to sanitize(xyz = "on|off")
 
 error[E0658]: the `#[sanitize]` attribute is an experimental feature
diff --git a/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.rs b/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.rs
index 26d483e43ae..794b51c7a8a 100644
--- a/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.rs
+++ b/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: format-string-proc-macro.rs
+//@ ignore-backends: gcc
 
 extern crate format_string_proc_macro;
 
diff --git a/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.stderr b/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.stderr
index e7ed2a76e6a..c341c6ee4c5 100644
--- a/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.stderr
+++ b/tests/ui/fmt/format-args-capture-from-pm-first-arg-macro.stderr
@@ -1,5 +1,5 @@
 error: there is no argument named `x`
-  --> $DIR/format-args-capture-from-pm-first-arg-macro.rs:6:5
+  --> $DIR/format-args-capture-from-pm-first-arg-macro.rs:7:5
    |
 LL |     format_string_proc_macro::bad_format_args_captures!();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/frontmatter/proc-macro-observer.rs b/tests/ui/frontmatter/proc-macro-observer.rs
index 6c4c8c57289..5237a0e982a 100644
--- a/tests/ui/frontmatter/proc-macro-observer.rs
+++ b/tests/ui/frontmatter/proc-macro-observer.rs
@@ -1,6 +1,7 @@
 //@ check-pass
 //@ proc-macro: makro.rs
 //@ edition: 2021
+//@ ignore-backends: gcc
 
 // Check that a proc-macro doesn't try to parse frontmatter and instead treats
 // it as a regular Rust token sequence. See `auxiliary/makro.rs` for details.
diff --git a/tests/ui/hygiene/issue-77523-def-site-async-await.rs b/tests/ui/hygiene/issue-77523-def-site-async-await.rs
index ad6bd5e0b78..0a279682b71 100644
--- a/tests/ui/hygiene/issue-77523-def-site-async-await.rs
+++ b/tests/ui/hygiene/issue-77523-def-site-async-await.rs
@@ -1,5 +1,6 @@
 //@ build-pass
 //@ aux-build:def-site-async-await.rs
+//@ ignore-backends: gcc
 
 // Regression test for issue #77523
 // Tests that we don't ICE when an unusual combination
diff --git a/tests/ui/impl-trait/call_method_ambiguous.next.stderr b/tests/ui/impl-trait/call_method_ambiguous.next.stderr
deleted file mode 100644
index 5251555f574..00000000000
--- a/tests/ui/impl-trait/call_method_ambiguous.next.stderr
+++ /dev/null
@@ -1,17 +0,0 @@
-error[E0282]: type annotations needed
-  --> $DIR/call_method_ambiguous.rs:26:13
-   |
-LL |         let mut iter = foo(n - 1, m);
-   |             ^^^^^^^^
-LL |
-LL |         assert_eq!(iter.get(), 1);
-   |                    ---- type must be known at this point
-   |
-help: consider giving `iter` an explicit type
-   |
-LL |         let mut iter: /* Type */ = foo(n - 1, m);
-   |                     ++++++++++++
-
-error: aborting due to 1 previous error
-
-For more information about this error, try `rustc --explain E0282`.
diff --git a/tests/ui/impl-trait/call_method_ambiguous.rs b/tests/ui/impl-trait/call_method_ambiguous.rs
index 6bcafc8ce14..021d6c22f79 100644
--- a/tests/ui/impl-trait/call_method_ambiguous.rs
+++ b/tests/ui/impl-trait/call_method_ambiguous.rs
@@ -1,6 +1,6 @@
 //@ revisions: current next
 //@[next] compile-flags: -Znext-solver
-//@[current] run-pass
+//@ run-pass
 
 trait Get {
     fn get(&mut self) -> u32;
@@ -24,7 +24,6 @@ where
 fn foo(n: usize, m: &mut ()) -> impl Get + use<'_> {
     if n > 0 {
         let mut iter = foo(n - 1, m);
-        //[next]~^ ERROR type annotations needed
         assert_eq!(iter.get(), 1);
     }
     m
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl.next.stderr b/tests/ui/impl-trait/call_method_on_inherent_impl.next.stderr
deleted file mode 100644
index 271051f120a..00000000000
--- a/tests/ui/impl-trait/call_method_on_inherent_impl.next.stderr
+++ /dev/null
@@ -1,17 +0,0 @@
-error[E0282]: type annotations needed
-  --> $DIR/call_method_on_inherent_impl.rs:18:13
-   |
-LL |         let x = my_foo();
-   |             ^
-LL |
-LL |         x.my_debug();
-   |         - type must be known at this point
-   |
-help: consider giving `x` an explicit type
-   |
-LL |         let x: /* Type */ = my_foo();
-   |              ++++++++++++
-
-error: aborting due to 1 previous error
-
-For more information about this error, try `rustc --explain E0282`.
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl.rs b/tests/ui/impl-trait/call_method_on_inherent_impl.rs
index 0e333c3260a..1dd38bc6717 100644
--- a/tests/ui/impl-trait/call_method_on_inherent_impl.rs
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl.rs
@@ -1,6 +1,6 @@
 //@ revisions: current next
 //@[next] compile-flags: -Znext-solver
-//@[current] check-pass
+//@ check-pass
 
 trait MyDebug {
     fn my_debug(&self);
@@ -16,7 +16,6 @@ where
 fn my_foo() -> impl std::fmt::Debug {
     if false {
         let x = my_foo();
-        //[next]~^ ERROR type annotations needed
         x.my_debug();
     }
     ()
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.current.stderr b/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.current.stderr
index 6ecb2b05fc5..e7104664470 100644
--- a/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.current.stderr
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.current.stderr
@@ -1,5 +1,5 @@
 error[E0599]: no method named `my_debug` found for reference `&impl Debug` in the current scope
-  --> $DIR/call_method_on_inherent_impl_on_rigid_type.rs:16:11
+  --> $DIR/call_method_on_inherent_impl_on_rigid_type.rs:15:11
    |
 LL |         x.my_debug();
    |           ^^^^^^^^ method not found in `&impl Debug`
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.next.stderr b/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.next.stderr
index 5fb0b8f1d14..de808259d40 100644
--- a/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.next.stderr
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.next.stderr
@@ -1,17 +1,15 @@
-error[E0282]: type annotations needed for `&_`
-  --> $DIR/call_method_on_inherent_impl_on_rigid_type.rs:14:13
+error[E0599]: no method named `my_debug` found for reference `&_` in the current scope
+  --> $DIR/call_method_on_inherent_impl_on_rigid_type.rs:15:11
    |
-LL |         let x = &my_foo();
-   |             ^
-LL |
 LL |         x.my_debug();
-   |           -------- type must be known at this point
+   |           ^^^^^^^^ method not found in `&_`
    |
-help: consider giving `x` an explicit type, where the placeholders `_` are specified
+   = help: items from traits can only be used if the trait is implemented and in scope
+help: trait `MyDebug` which provides `my_debug` is implemented but not in scope; perhaps you want to import it
+   |
+LL + use MyDebug;
    |
-LL |         let x: &_ = &my_foo();
-   |              ++++
 
 error: aborting due to 1 previous error
 
-For more information about this error, try `rustc --explain E0282`.
+For more information about this error, try `rustc --explain E0599`.
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.rs b/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.rs
index 7fb2ff3b2bc..0c9909efa1b 100644
--- a/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.rs
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl_on_rigid_type.rs
@@ -12,9 +12,8 @@ impl MyDebug for &() {
 fn my_foo() -> impl std::fmt::Debug {
     if false {
         let x = &my_foo();
-        //[next]~^ ERROR: type annotations needed
         x.my_debug();
-        //[current]~^ ERROR: no method named `my_debug`
+        //~^ ERROR: no method named `my_debug`
     }
     ()
 }
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_ref.current.stderr b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.current.stderr
index fb51bb7b417..71acbd1497d 100644
--- a/tests/ui/impl-trait/call_method_on_inherent_impl_ref.current.stderr
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.current.stderr
@@ -1,5 +1,5 @@
 error[E0599]: no method named `my_debug` found for opaque type `impl Debug` in the current scope
-  --> $DIR/call_method_on_inherent_impl_ref.rs:19:11
+  --> $DIR/call_method_on_inherent_impl_ref-err.rs:18:11
    |
 LL |     fn my_debug(&self);
    |        -------- the method is available for `&impl Debug` here
@@ -9,7 +9,7 @@ LL |         x.my_debug();
    |
    = help: items from traits can only be used if the trait is implemented and in scope
 note: `MyDebug` defines an item `my_debug`, perhaps you need to implement it
-  --> $DIR/call_method_on_inherent_impl_ref.rs:4:1
+  --> $DIR/call_method_on_inherent_impl_ref-err.rs:4:1
    |
 LL | trait MyDebug {
    | ^^^^^^^^^^^^^
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.next.stderr b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.next.stderr
new file mode 100644
index 00000000000..523505e9802
--- /dev/null
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.next.stderr
@@ -0,0 +1,19 @@
+error[E0599]: no method named `my_debug` found for type `_` in the current scope
+  --> $DIR/call_method_on_inherent_impl_ref-err.rs:18:11
+   |
+LL |     fn my_debug(&self);
+   |        -------- the method is available for `&_` here
+...
+LL |         x.my_debug();
+   |           ^^^^^^^^ method not found in `_`
+   |
+   = help: items from traits can only be used if the trait is implemented and in scope
+note: `MyDebug` defines an item `my_debug`, perhaps you need to implement it
+  --> $DIR/call_method_on_inherent_impl_ref-err.rs:4:1
+   |
+LL | trait MyDebug {
+   | ^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0599`.
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.rs b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.rs
new file mode 100644
index 00000000000..0ed09bc76a4
--- /dev/null
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-err.rs
@@ -0,0 +1,24 @@
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+
+trait MyDebug {
+    fn my_debug(&self);
+}
+
+impl<T> MyDebug for &T
+where
+    T: std::fmt::Debug,
+{
+    fn my_debug(&self) {}
+}
+
+fn my_foo() -> impl std::fmt::Debug {
+    if false {
+        let x = my_foo();
+        x.my_debug();
+        //~^ ERROR no method named `my_debug` found
+    }
+    ()
+}
+
+fn main() {}
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_ref.rs b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-ok.rs
index 4e4098b37f9..40739d6a0ce 100644
--- a/tests/ui/impl-trait/call_method_on_inherent_impl_ref.rs
+++ b/tests/ui/impl-trait/call_method_on_inherent_impl_ref-ok.rs
@@ -1,5 +1,6 @@
 //@ revisions: current next
 //@[next] compile-flags: -Znext-solver
+//@ check-pass
 
 trait MyDebug {
     fn my_debug(&self);
@@ -12,20 +13,9 @@ where
     fn my_debug(&self) {}
 }
 
-fn my_foo() -> impl std::fmt::Debug {
-    if false {
-        let x = my_foo();
-        //[next]~^ ERROR type annotations needed
-        x.my_debug();
-        //[current]~^ ERROR no method named `my_debug` found
-    }
-    ()
-}
-
 fn my_bar() -> impl std::fmt::Debug {
     if false {
         let x = &my_bar();
-        //[next]~^ ERROR type annotations needed
         x.my_debug();
     }
     ()
diff --git a/tests/ui/impl-trait/call_method_on_inherent_impl_ref.next.stderr b/tests/ui/impl-trait/call_method_on_inherent_impl_ref.next.stderr
deleted file mode 100644
index 7202cb6f90a..00000000000
--- a/tests/ui/impl-trait/call_method_on_inherent_impl_ref.next.stderr
+++ /dev/null
@@ -1,31 +0,0 @@
-error[E0282]: type annotations needed
-  --> $DIR/call_method_on_inherent_impl_ref.rs:17:13
-   |
-LL |         let x = my_foo();
-   |             ^
-LL |
-LL |         x.my_debug();
-   |         - type must be known at this point
-   |
-help: consider giving `x` an explicit type
-   |
-LL |         let x: /* Type */ = my_foo();
-   |              ++++++++++++
-
-error[E0282]: type annotations needed for `&_`
-  --> $DIR/call_method_on_inherent_impl_ref.rs:27:13
-   |
-LL |         let x = &my_bar();
-   |             ^
-LL |
-LL |         x.my_debug();
-   |           -------- type must be known at this point
-   |
-help: consider giving `x` an explicit type, where the placeholders `_` are specified
-   |
-LL |         let x: &_ = &my_bar();
-   |              ++++
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0282`.
diff --git a/tests/ui/impl-trait/hidden-type-is-opaque-2.default.stderr b/tests/ui/impl-trait/hidden-type-is-opaque-2.default.stderr
index dca0a7b0a1a..cb383b2db38 100644
--- a/tests/ui/impl-trait/hidden-type-is-opaque-2.default.stderr
+++ b/tests/ui/impl-trait/hidden-type-is-opaque-2.default.stderr
@@ -5,7 +5,7 @@ LL |     Thunk::new(|mut cont| {
    |                 ^^^^^^^^
 LL |
 LL |         cont.reify_as();
-   |         ---- type must be known at this point
+   |              -------- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
@@ -19,7 +19,7 @@ LL |     Thunk::new(|mut cont| {
    |                 ^^^^^^^^
 LL |
 LL |         cont.reify_as();
-   |         ---- type must be known at this point
+   |              -------- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
diff --git a/tests/ui/impl-trait/hidden-type-is-opaque-2.next.stderr b/tests/ui/impl-trait/hidden-type-is-opaque-2.next.stderr
index dca0a7b0a1a..cb383b2db38 100644
--- a/tests/ui/impl-trait/hidden-type-is-opaque-2.next.stderr
+++ b/tests/ui/impl-trait/hidden-type-is-opaque-2.next.stderr
@@ -5,7 +5,7 @@ LL |     Thunk::new(|mut cont| {
    |                 ^^^^^^^^
 LL |
 LL |         cont.reify_as();
-   |         ---- type must be known at this point
+   |              -------- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
@@ -19,7 +19,7 @@ LL |     Thunk::new(|mut cont| {
    |                 ^^^^^^^^
 LL |
 LL |         cont.reify_as();
-   |         ---- type must be known at this point
+   |              -------- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
diff --git a/tests/ui/impl-trait/method-resolution4.next.stderr b/tests/ui/impl-trait/method-resolution4.next.stderr
deleted file mode 100644
index 0524f49f98e..00000000000
--- a/tests/ui/impl-trait/method-resolution4.next.stderr
+++ /dev/null
@@ -1,9 +0,0 @@
-error[E0282]: type annotations needed
-  --> $DIR/method-resolution4.rs:13:9
-   |
-LL |         foo(false).next().unwrap();
-   |         ^^^^^^^^^^ cannot infer type
-
-error: aborting due to 1 previous error
-
-For more information about this error, try `rustc --explain E0282`.
diff --git a/tests/ui/impl-trait/method/broken-deref-chain.current.stderr b/tests/ui/impl-trait/method/broken-deref-chain.current.stderr
new file mode 100644
index 00000000000..726f076b183
--- /dev/null
+++ b/tests/ui/impl-trait/method/broken-deref-chain.current.stderr
@@ -0,0 +1,19 @@
+error[E0308]: mismatched types
+  --> $DIR/broken-deref-chain.rs:41:30
+   |
+LL | fn trait_method() -> impl Trait {
+   |                      ---------- the found opaque type
+...
+LL |         x.trait_method();
+   |         - here the type of `x` is inferred to be `Foo<u32, impl Trait>`
+LL |         let _: Foo<i32, _> = x; // Test that we did not apply the deref step
+   |                -----------   ^ expected `Foo<i32, _>`, found `Foo<u32, impl Trait>`
+   |                |
+   |                expected due to this
+   |
+   = note: expected struct `Foo<i32, _>`
+              found struct `Foo<u32, impl Trait>`
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/tests/ui/impl-trait/method/broken-deref-chain.rs b/tests/ui/impl-trait/method/broken-deref-chain.rs
new file mode 100644
index 00000000000..8b45e044f43
--- /dev/null
+++ b/tests/ui/impl-trait/method/broken-deref-chain.rs
@@ -0,0 +1,47 @@
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+//@[next] check-pass
+
+// An annoying edge case of method selection. While computing the deref-chain
+// constrains `T` to `u32`, the final method candidate does not and instead
+// constrains to `i32`. In this case, we no longer check that the opaque
+// remains unconstrained. Both method calls in this test constrain the opaque
+// to `i32`.
+use std::ops::Deref;
+
+struct Foo<T, U>(T, U);
+impl<U> Deref for Foo<u32, U> {
+    type Target = U;
+    fn deref(&self) -> &Self::Target {
+        &self.1
+    }
+}
+
+impl Foo<i32, i32> {
+    fn method(&self) {}
+}
+fn inherent_method() -> impl Sized {
+    if false {
+        let x = Foo(Default::default(), inherent_method());
+        x.method();
+        let _: Foo<i32, _> = x; // Test that we did not apply the deref step
+    }
+    1i32
+}
+
+trait Trait {
+    fn trait_method(&self) {}
+}
+impl Trait for Foo<i32, i32> {}
+impl Trait for i32 {}
+fn trait_method() -> impl Trait {
+    if false {
+        let x = Foo(Default::default(), trait_method());
+        x.trait_method();
+        let _: Foo<i32, _> = x; // Test that we did not apply the deref step
+        //[current]~^ ERROR mismatched types
+    }
+    1i32
+}
+
+fn main() {}
diff --git a/tests/ui/impl-trait/method-resolution.rs b/tests/ui/impl-trait/method/method-resolution.rs
index 60fbacd8646..60fbacd8646 100644
--- a/tests/ui/impl-trait/method-resolution.rs
+++ b/tests/ui/impl-trait/method/method-resolution.rs
diff --git a/tests/ui/impl-trait/method-resolution2.next.stderr b/tests/ui/impl-trait/method/method-resolution2.next.stderr
index 223430e1658..223430e1658 100644
--- a/tests/ui/impl-trait/method-resolution2.next.stderr
+++ b/tests/ui/impl-trait/method/method-resolution2.next.stderr
diff --git a/tests/ui/impl-trait/method-resolution2.rs b/tests/ui/impl-trait/method/method-resolution2.rs
index 88d4f3d9896..88d4f3d9896 100644
--- a/tests/ui/impl-trait/method-resolution2.rs
+++ b/tests/ui/impl-trait/method/method-resolution2.rs
diff --git a/tests/ui/impl-trait/method-resolution3.current.stderr b/tests/ui/impl-trait/method/method-resolution3.current.stderr
index 87dd862ef8f..87dd862ef8f 100644
--- a/tests/ui/impl-trait/method-resolution3.current.stderr
+++ b/tests/ui/impl-trait/method/method-resolution3.current.stderr
diff --git a/tests/ui/impl-trait/method-resolution3.next.stderr b/tests/ui/impl-trait/method/method-resolution3.next.stderr
index 87dd862ef8f..87dd862ef8f 100644
--- a/tests/ui/impl-trait/method-resolution3.next.stderr
+++ b/tests/ui/impl-trait/method/method-resolution3.next.stderr
diff --git a/tests/ui/impl-trait/method-resolution3.rs b/tests/ui/impl-trait/method/method-resolution3.rs
index 8c47ef4fc75..8c47ef4fc75 100644
--- a/tests/ui/impl-trait/method-resolution3.rs
+++ b/tests/ui/impl-trait/method/method-resolution3.rs
diff --git a/tests/ui/impl-trait/method-resolution4.rs b/tests/ui/impl-trait/method/method-resolution4.rs
index 90e7850cad5..f90a9309cda 100644
--- a/tests/ui/impl-trait/method-resolution4.rs
+++ b/tests/ui/impl-trait/method/method-resolution4.rs
@@ -6,12 +6,11 @@
 
 //@ revisions: current next
 //@[next] compile-flags: -Znext-solver
-//@[current] check-pass
+//@ check-pass
 
 fn foo(b: bool) -> impl Iterator<Item = ()> {
     if b {
         foo(false).next().unwrap();
-        //[next]~^ ERROR type annotations needed
     }
     std::iter::empty()
 }
diff --git a/tests/ui/impl-trait/method/method-resolution5-deref-no-constrain.current.stderr b/tests/ui/impl-trait/method/method-resolution5-deref-no-constrain.current.stderr
new file mode 100644
index 00000000000..08578de426a
--- /dev/null
+++ b/tests/ui/impl-trait/method/method-resolution5-deref-no-constrain.current.stderr
@@ -0,0 +1,19 @@
+error[E0308]: mismatched types
+  --> $DIR/method-resolution5-deref-no-constrain.rs:20:5
+   |
+LL | fn via_deref() -> impl Deref<Target = Foo> {
+   |                                       --- expected `&Foo` because of return type
+...
+LL |     Box::new(Foo)
+   |     ^^^^^^^^^^^^^ expected `&Foo`, found `Box<Foo>`
+   |
+   = note: expected reference `&Foo`
+                 found struct `Box<Foo>`
+help: consider borrowing here
+   |
+LL |     &Box::new(Foo)
+   |     +
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/tests/ui/impl-trait/method/method-resolution5-deref-no-constrain.rs b/tests/ui/impl-trait/method/method-resolution5-deref-no-constrain.rs
new file mode 100644
index 00000000000..2c41f62b9fd
--- /dev/null
+++ b/tests/ui/impl-trait/method/method-resolution5-deref-no-constrain.rs
@@ -0,0 +1,23 @@
+//! The recursive method call yields the opaque type. We want
+//! to use the impl candidate for `Foo` here without constraining
+//! the opaque to `&Foo`.
+
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+//@[next] check-pass
+
+use std::ops::Deref;
+struct Foo;
+impl Foo {
+    fn method(&self) {}
+}
+fn via_deref() -> impl Deref<Target = Foo> {
+    // Currently errors on stable, but should not
+    if false {
+        via_deref().method();
+    }
+
+    Box::new(Foo)
+    //[current]~^ ERROR mismatched types
+}
+fn main() {}
diff --git a/tests/ui/impl-trait/method/method-resolution5-deref.rs b/tests/ui/impl-trait/method/method-resolution5-deref.rs
new file mode 100644
index 00000000000..6133a8efe24
--- /dev/null
+++ b/tests/ui/impl-trait/method/method-resolution5-deref.rs
@@ -0,0 +1,30 @@
+//! The recursive method call yields the opaque type. We want
+//! to use the trait candidate for `impl Foo` here while not
+//! applying it for the `impl Deref`.
+
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+//@ check-pass
+
+use std::ops::Deref;
+trait Foo {
+    fn method(&self) {}
+}
+impl Foo for u32 {}
+fn via_deref() -> impl Deref<Target = impl Foo> {
+    if false {
+        via_deref().method();
+    }
+
+    Box::new(1u32)
+}
+
+fn via_deref_nested() -> Box<impl Deref<Target = impl Foo>> {
+    if false {
+        via_deref_nested().method();
+    }
+
+    Box::new(Box::new(1u32))
+}
+
+fn main() {}
diff --git a/tests/ui/impl-trait/method/would-constrain-opaque.current.stderr b/tests/ui/impl-trait/method/would-constrain-opaque.current.stderr
new file mode 100644
index 00000000000..60533a39c53
--- /dev/null
+++ b/tests/ui/impl-trait/method/would-constrain-opaque.current.stderr
@@ -0,0 +1,29 @@
+error[E0599]: no method named `method` found for reference `&impl Sized` in the current scope
+  --> $DIR/would-constrain-opaque.rs:28:11
+   |
+LL |         x.method();
+   |           ^^^^^^ method not found in `&impl Sized`
+   |
+   = help: items from traits can only be used if the trait is implemented and in scope
+note: `Trait` defines an item `method`, perhaps you need to implement it
+  --> $DIR/would-constrain-opaque.rs:15:1
+   |
+LL | trait Trait: Sized {
+   | ^^^^^^^^^^^^^^^^^^
+
+error[E0599]: no method named `method` found for reference `&impl Sized` in the current scope
+  --> $DIR/would-constrain-opaque.rs:30:11
+   |
+LL |         x.method();
+   |           ^^^^^^ method not found in `&impl Sized`
+   |
+   = help: items from traits can only be used if the trait is implemented and in scope
+note: `Trait` defines an item `method`, perhaps you need to implement it
+  --> $DIR/would-constrain-opaque.rs:15:1
+   |
+LL | trait Trait: Sized {
+   | ^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0599`.
diff --git a/tests/ui/impl-trait/method/would-constrain-opaque.next.stderr b/tests/ui/impl-trait/method/would-constrain-opaque.next.stderr
new file mode 100644
index 00000000000..23a4ceb826a
--- /dev/null
+++ b/tests/ui/impl-trait/method/would-constrain-opaque.next.stderr
@@ -0,0 +1,27 @@
+error[E0599]: no method named `method` found for reference `&_` in the current scope
+  --> $DIR/would-constrain-opaque.rs:28:11
+   |
+LL |         x.method();
+   |           ^^^^^^ method not found in `&_`
+   |
+   = help: items from traits can only be used if the trait is implemented and in scope
+help: trait `Trait` which provides `method` is implemented but not in scope; perhaps you want to import it
+   |
+LL + use Trait;
+   |
+
+error[E0599]: no method named `method` found for reference `&_` in the current scope
+  --> $DIR/would-constrain-opaque.rs:30:11
+   |
+LL |         x.method();
+   |           ^^^^^^ method not found in `&_`
+   |
+   = help: items from traits can only be used if the trait is implemented and in scope
+help: trait `Trait` which provides `method` is implemented but not in scope; perhaps you want to import it
+   |
+LL + use Trait;
+   |
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0599`.
diff --git a/tests/ui/impl-trait/method/would-constrain-opaque.rs b/tests/ui/impl-trait/method/would-constrain-opaque.rs
new file mode 100644
index 00000000000..8dd32282529
--- /dev/null
+++ b/tests/ui/impl-trait/method/would-constrain-opaque.rs
@@ -0,0 +1,39 @@
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+
+// If we don't treat `impl Sized` as rigid, the first call would
+// resolve to the trait method, constraining the opaque, while the
+// second call would resolve to the inherent method.
+//
+// We avoid cases like this by rejecting candidates which constrain
+// opaque types encountered in the autoderef chain.
+//
+// FIXME(-Znext-solver): ideally we would note that the inference variable
+// is an opaque type in the error message and change this to a type annotations
+// needed error.
+
+trait Trait: Sized {
+    fn method(self) {}
+}
+impl Trait for &Foo {}
+
+struct Foo;
+impl Foo {
+    fn method(&self) {}
+}
+
+fn define_opaque(b: bool) -> impl Sized {
+    if b {
+        let x = &define_opaque(false);
+        x.method();
+        //~^ ERROR no method named `method` found for reference
+        x.method();
+        //~^ ERROR no method named `method` found for reference
+    }
+
+    Foo
+}
+
+fn main() {
+    define_opaque(true);
+}
diff --git a/tests/ui/impl-trait/precise-capturing/external-macro.rs b/tests/ui/impl-trait/precise-capturing/external-macro.rs
index 9d4d8a1bb11..1342ecd58dc 100644
--- a/tests/ui/impl-trait/precise-capturing/external-macro.rs
+++ b/tests/ui/impl-trait/precise-capturing/external-macro.rs
@@ -6,6 +6,7 @@
 //@ aux-crate: no_use_macro=no-use-macro.rs
 //@ edition: 2024
 //@ check-pass
+//@ ignore-backends: gcc
 
 no_use_pm::pm_rpit!{}
 
diff --git a/tests/ui/impl-trait/recursive-bound-eval.next.stderr b/tests/ui/impl-trait/recursive-bound-eval.next.stderr
deleted file mode 100644
index 4bab290d71c..00000000000
--- a/tests/ui/impl-trait/recursive-bound-eval.next.stderr
+++ /dev/null
@@ -1,9 +0,0 @@
-error[E0282]: type annotations needed
-  --> $DIR/recursive-bound-eval.rs:20:13
-   |
-LL |     move || recursive_fn().parse()
-   |             ^^^^^^^^^^^^^^ cannot infer type
-
-error: aborting due to 1 previous error
-
-For more information about this error, try `rustc --explain E0282`.
diff --git a/tests/ui/impl-trait/recursive-bound-eval.rs b/tests/ui/impl-trait/recursive-bound-eval.rs
index 7859c8983fc..058b12e5651 100644
--- a/tests/ui/impl-trait/recursive-bound-eval.rs
+++ b/tests/ui/impl-trait/recursive-bound-eval.rs
@@ -1,10 +1,9 @@
 //! Test that we can evaluate nested obligations when invoking methods on recursive calls on
 //! an RPIT.
 
-//@revisions: next current
+//@ revisions: next current
 //@[next] compile-flags: -Znext-solver
-
-//@[current] check-pass
+//@ check-pass
 
 pub trait Parser<E> {
     fn parse(&self) -> E;
@@ -18,7 +17,6 @@ impl<E, T: Fn() -> E> Parser<E> for T {
 
 pub fn recursive_fn<E>() -> impl Parser<E> {
     move || recursive_fn().parse()
-    //[next]~^ ERROR: type annotations needed
 }
 
 fn main() {}
diff --git a/tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr b/tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr
deleted file mode 100644
index 5ce6eb0fc39..00000000000
--- a/tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr
+++ /dev/null
@@ -1,17 +0,0 @@
-error[E0282]: type annotations needed
-  --> $DIR/recursive-coroutine-boxed.rs:11:23
-   |
-LL |         let mut gen = Box::pin(foo());
-   |                       ^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `Box`
-LL |
-LL |         let mut r = gen.as_mut().resume(());
-   |                         ------ type must be known at this point
-   |
-help: consider specifying the generic argument
-   |
-LL |         let mut gen = Box::<T>::pin(foo());
-   |                          +++++
-
-error: aborting due to 1 previous error
-
-For more information about this error, try `rustc --explain E0282`.
diff --git a/tests/ui/impl-trait/recursive-coroutine-boxed.rs b/tests/ui/impl-trait/recursive-coroutine-boxed.rs
index 306edc3591e..932023d103d 100644
--- a/tests/ui/impl-trait/recursive-coroutine-boxed.rs
+++ b/tests/ui/impl-trait/recursive-coroutine-boxed.rs
@@ -1,7 +1,7 @@
 //@ revisions: current next
 //@ ignore-compare-mode-next-solver (explicit revisions)
-//@[current] check-pass
 //@[next] compile-flags: -Znext-solver
+//@ check-pass
 #![feature(coroutines, coroutine_trait)]
 
 use std::ops::{Coroutine, CoroutineState};
@@ -9,7 +9,6 @@ use std::ops::{Coroutine, CoroutineState};
 fn foo() -> impl Coroutine<Yield = (), Return = ()> {
     #[coroutine] || {
         let mut gen = Box::pin(foo());
-        //[next]~^ ERROR type annotations needed
         let mut r = gen.as_mut().resume(());
         while let CoroutineState::Yielded(v) = r {
             yield v;
diff --git a/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-0.stderr b/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-0.stderr
index 10056bdf3d4..ba1c81c4518 100644
--- a/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-0.stderr
+++ b/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-0.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed
   --> $DIR/incompat-call-after-qualified-path-0.rs:21:6
    |
 LL |   f(|a, b| a.cmp(b));
-   |      ^     - type must be known at this point
+   |      ^       --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
diff --git a/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-1.stderr b/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-1.stderr
index 632a9b99f84..93bba3625b5 100644
--- a/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-1.stderr
+++ b/tests/ui/inference/need_type_info/incompat-call-after-qualified-path-1.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed
   --> $DIR/incompat-call-after-qualified-path-1.rs:25:6
    |
 LL |   f(|a, b| a.cmp(b));
-   |      ^     - type must be known at this point
+   |      ^       --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
diff --git a/tests/ui/inference/need_type_info/issue-107745-avoid-expr-from-macro-expansion.stderr b/tests/ui/inference/need_type_info/issue-107745-avoid-expr-from-macro-expansion.stderr
index 3de317d2af6..a78941f9e11 100644
--- a/tests/ui/inference/need_type_info/issue-107745-avoid-expr-from-macro-expansion.stderr
+++ b/tests/ui/inference/need_type_info/issue-107745-avoid-expr-from-macro-expansion.stderr
@@ -1,10 +1,10 @@
 error[E0282]: type annotations needed
-  --> $DIR/issue-107745-avoid-expr-from-macro-expansion.rs:17:22
+  --> $DIR/issue-107745-avoid-expr-from-macro-expansion.rs:17:5
    |
 LL |     println!("{:?}", []);
-   |                      ^^ cannot infer type
+   |     ^^^^^^^^^^^^^^^^^^^^ cannot infer type
    |
-   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
+   = note: this error originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/invalid-compile-flags/invalid-llvm-passes.rs b/tests/ui/invalid-compile-flags/invalid-llvm-passes.rs
index 832821c9c88..2ed0014f8b0 100644
--- a/tests/ui/invalid-compile-flags/invalid-llvm-passes.rs
+++ b/tests/ui/invalid-compile-flags/invalid-llvm-passes.rs
@@ -1,5 +1,6 @@
 //@ build-fail
 //@ compile-flags: -Cpasses=unknown-pass
+//@ ignore-backends: gcc
 
 fn main() {}
 
diff --git a/tests/ui/invalid/invalid-debugger-visualizer-option.rs b/tests/ui/invalid/invalid-debugger-visualizer-option.rs
index 0f1cf15a687..166962866dc 100644
--- a/tests/ui/invalid/invalid-debugger-visualizer-option.rs
+++ b/tests/ui/invalid/invalid-debugger-visualizer-option.rs
@@ -1,6 +1,6 @@
 //@ normalize-stderr: "foo.random:.*\(" -> "foo.random: $$FILE_NOT_FOUND_MSG ("
 //@ normalize-stderr: "os error \d+" -> "os error $$FILE_NOT_FOUND_CODE"
 
-#![debugger_visualizer(random_file = "../foo.random")] //~ ERROR invalid argument
+#![debugger_visualizer(random_file = "../foo.random")] //~ ERROR malformed `debugger_visualizer` attribute input
 #![debugger_visualizer(natvis_file = "../foo.random")] //~ ERROR
 fn main() {}
diff --git a/tests/ui/invalid/invalid-debugger-visualizer-option.stderr b/tests/ui/invalid/invalid-debugger-visualizer-option.stderr
index 6fbb4d641e6..e877e39d8f1 100644
--- a/tests/ui/invalid/invalid-debugger-visualizer-option.stderr
+++ b/tests/ui/invalid/invalid-debugger-visualizer-option.stderr
@@ -1,18 +1,20 @@
-error: invalid argument
-  --> $DIR/invalid-debugger-visualizer-option.rs:4:24
-   |
-LL | #![debugger_visualizer(random_file = "../foo.random")]
-   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: expected: `natvis_file = "..."`
-   = note: OR
-   = note: expected: `gdb_script_file = "..."`
-
 error: couldn't read $DIR/../foo.random: $FILE_NOT_FOUND_MSG (os error $FILE_NOT_FOUND_CODE)
   --> $DIR/invalid-debugger-visualizer-option.rs:5:24
    |
 LL | #![debugger_visualizer(natvis_file = "../foo.random")]
    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+error[E0539]: malformed `debugger_visualizer` attribute input
+  --> $DIR/invalid-debugger-visualizer-option.rs:4:1
+   |
+LL | #![debugger_visualizer(random_file = "../foo.random")]
+   | ^^^^^^^^^^^^^^^^^^^^^^^-----------^^^^^^^^^^^^^^^^^^^^
+   | |                      |
+   | |                      valid arguments are `natvis_file` or `gdb_script_file`
+   | help: must be of the form: `#![debugger_visualizer(natvis_file = "...", gdb_script_file = "...")]`
+   |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/attributes/debugger.html#the-debugger_visualizer-attribute>
+
 error: aborting due to 2 previous errors
 
+For more information about this error, try `rustc --explain E0539`.
diff --git a/tests/ui/invalid/invalid-debugger-visualizer-target.rs b/tests/ui/invalid/invalid-debugger-visualizer-target.rs
index 1efb9555c24..48b04153214 100644
--- a/tests/ui/invalid/invalid-debugger-visualizer-target.rs
+++ b/tests/ui/invalid/invalid-debugger-visualizer-target.rs
@@ -1,2 +1,3 @@
-#[debugger_visualizer(natvis_file = "./foo.natvis.xml")] //~ ERROR attribute should be applied to a module
+#[debugger_visualizer(natvis_file = "./foo.natvis.xml")]
+//~^ ERROR `#[debugger_visualizer]` attribute cannot be used on functions
 fn main() {}
diff --git a/tests/ui/invalid/invalid-debugger-visualizer-target.stderr b/tests/ui/invalid/invalid-debugger-visualizer-target.stderr
index 1df34532533..629af94c5ef 100644
--- a/tests/ui/invalid/invalid-debugger-visualizer-target.stderr
+++ b/tests/ui/invalid/invalid-debugger-visualizer-target.stderr
@@ -1,8 +1,10 @@
-error: attribute should be applied to a module
+error: `#[debugger_visualizer]` attribute cannot be used on functions
   --> $DIR/invalid-debugger-visualizer-target.rs:1:1
    |
 LL | #[debugger_visualizer(natvis_file = "./foo.natvis.xml")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: `#[debugger_visualizer]` can be applied to modules and crates
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-2151.stderr b/tests/ui/issues/issue-2151.stderr
index b130f162414..59fef42eb5e 100644
--- a/tests/ui/issues/issue-2151.stderr
+++ b/tests/ui/issues/issue-2151.stderr
@@ -4,7 +4,7 @@ error[E0282]: type annotations needed
 LL |     let x = panic!();
    |         ^
 LL |     x.clone();
-   |     - type must be known at this point
+   |       ----- type must be known at this point
    |
 help: consider giving `x` an explicit type
    |
diff --git a/tests/ui/issues/issue-25089.rs b/tests/ui/issues/issue-25089.rs
index 929738c3e79..63fdf64cea9 100644
--- a/tests/ui/issues/issue-25089.rs
+++ b/tests/ui/issues/issue-25089.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 use std::thread;
 
diff --git a/tests/ui/issues/issue-26655.rs b/tests/ui/issues/issue-26655.rs
index 416472b0b26..32c4b33a8c9 100644
--- a/tests/ui/issues/issue-26655.rs
+++ b/tests/ui/issues/issue-26655.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 // Check that the destructors of simple enums are run on unwinding
 
diff --git a/tests/ui/issues/issue-27592.stderr b/tests/ui/issues/issue-27592.stderr
index c8649d82d74..f1de7b9e569 100644
--- a/tests/ui/issues/issue-27592.stderr
+++ b/tests/ui/issues/issue-27592.stderr
@@ -1,3 +1,9 @@
+error[E0515]: cannot return reference to temporary value
+  --> $DIR/issue-27592.rs:16:14
+   |
+LL |     write(|| format_args!("{}", String::from("Hello world")));
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returns a reference to data owned by the current function
+
 error[E0515]: cannot return value referencing temporary value
   --> $DIR/issue-27592.rs:16:14
    |
@@ -7,12 +13,6 @@ LL |     write(|| format_args!("{}", String::from("Hello world")));
    |              |                  temporary value created here
    |              returns a value referencing data owned by the current function
 
-error[E0515]: cannot return reference to temporary value
-  --> $DIR/issue-27592.rs:16:14
-   |
-LL |     write(|| format_args!("{}", String::from("Hello world")));
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returns a reference to data owned by the current function
-
 error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0515`.
diff --git a/tests/ui/issues/issue-29485.rs b/tests/ui/issues/issue-29485.rs
index a44bcd49c6a..8e6436cb11e 100644
--- a/tests/ui/issues/issue-29485.rs
+++ b/tests/ui/issues/issue-29485.rs
@@ -3,6 +3,7 @@
 //@ aux-build:issue-29485.rs
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 #[feature(recover)]
 
diff --git a/tests/ui/issues/issue-30018-panic.rs b/tests/ui/issues/issue-30018-panic.rs
index 591848b6f7b..09b832bb59d 100644
--- a/tests/ui/issues/issue-30018-panic.rs
+++ b/tests/ui/issues/issue-30018-panic.rs
@@ -6,6 +6,7 @@
 
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 struct Foo;
 
diff --git a/tests/ui/issues/issue-44056.rs b/tests/ui/issues/issue-44056.rs
index 12e4f018466..37d7b00cf7f 100644
--- a/tests/ui/issues/issue-44056.rs
+++ b/tests/ui/issues/issue-44056.rs
@@ -2,5 +2,6 @@
 //@ only-x86_64
 //@ no-prefer-dynamic
 //@ compile-flags: -Ctarget-feature=+avx -Clto
+//@ ignore-backends: gcc
 
 fn main() {}
diff --git a/tests/ui/issues/issue-68696-catch-during-unwind.rs b/tests/ui/issues/issue-68696-catch-during-unwind.rs
index 80d63b0cde7..655879e1869 100644
--- a/tests/ui/issues/issue-68696-catch-during-unwind.rs
+++ b/tests/ui/issues/issue-68696-catch-during-unwind.rs
@@ -4,6 +4,7 @@
 // entering the catch_unwind.
 //
 //@ run-pass
+//@ ignore-backends: gcc
 
 use std::panic::catch_unwind;
 
diff --git a/tests/ui/lang-items/missing-copy-lang-item-issue-19660.rs b/tests/ui/lang-items/missing-copy-lang-item-issue-19660.rs
deleted file mode 100644
index 35d5d079c68..00000000000
--- a/tests/ui/lang-items/missing-copy-lang-item-issue-19660.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-#![feature(lang_items, no_core)]
-#![no_core]
-#![no_main]
-
-#[lang = "pointee_sized"]
-pub trait PointeeSized {}
-
-#[lang = "meta_sized"]
-pub trait MetaSized: PointeeSized {}
-
-#[lang = "sized"]
-trait Sized: MetaSized { }
-
-struct S;
-
-#[no_mangle]
-extern "C" fn main(argc: i32, _argv: *const *const u8) -> i32 {
-    argc //~ ERROR requires `copy` lang_item
-}
diff --git a/tests/ui/lang-items/missing-copy-lang-item-issue-19660.stderr b/tests/ui/lang-items/missing-copy-lang-item-issue-19660.stderr
deleted file mode 100644
index 7b9541f734f..00000000000
--- a/tests/ui/lang-items/missing-copy-lang-item-issue-19660.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: requires `copy` lang_item
-  --> $DIR/missing-copy-lang-item-issue-19660.rs:18:5
-   |
-LL |     argc
-   |     ^^^^
-
-error: aborting due to 1 previous error
-
diff --git a/tests/ui/lazy-type-alias-impl-trait/branches3.stderr b/tests/ui/lazy-type-alias-impl-trait/branches3.stderr
index 117d189867b..539673bc343 100644
--- a/tests/ui/lazy-type-alias-impl-trait/branches3.stderr
+++ b/tests/ui/lazy-type-alias-impl-trait/branches3.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed
   --> $DIR/branches3.rs:9:10
    |
 LL |         |s| s.len()
-   |          ^  - type must be known at this point
+   |          ^    --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
@@ -13,7 +13,7 @@ error[E0282]: type annotations needed
   --> $DIR/branches3.rs:18:10
    |
 LL |         |s| s.len()
-   |          ^  - type must be known at this point
+   |          ^    --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
@@ -24,7 +24,7 @@ error[E0282]: type annotations needed
   --> $DIR/branches3.rs:26:10
    |
 LL |         |s| s.len()
-   |          ^  - type must be known at this point
+   |          ^    --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
@@ -35,7 +35,7 @@ error[E0282]: type annotations needed
   --> $DIR/branches3.rs:33:10
    |
 LL |         |s| s.len()
-   |          ^  - type must be known at this point
+   |          ^    --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
diff --git a/tests/ui/linkage-attr/common-linkage-non-zero-init.rs b/tests/ui/linkage-attr/common-linkage-non-zero-init.rs
index e5de08a7a28..512616251c2 100644
--- a/tests/ui/linkage-attr/common-linkage-non-zero-init.rs
+++ b/tests/ui/linkage-attr/common-linkage-non-zero-init.rs
@@ -3,6 +3,7 @@
 //@ known-bug: #109681
 //@ ignore-wasm32 this appears to SIGABRT on wasm, not fail cleanly
 //@ compile-flags: -Z verify-llvm-ir
+//@ ignore-backends: gcc
 
 // This test verifies that we continue to hit the LLVM error for common linkage with non-zero
 // initializers, since it generates invalid LLVM IR.
diff --git a/tests/ui/linkage-attr/raw-dylib/elf/glibc-x86_64.rs b/tests/ui/linkage-attr/raw-dylib/elf/glibc-x86_64.rs
index 57492ed2d0e..62d352facd1 100644
--- a/tests/ui/linkage-attr/raw-dylib/elf/glibc-x86_64.rs
+++ b/tests/ui/linkage-attr/raw-dylib/elf/glibc-x86_64.rs
@@ -3,6 +3,7 @@
 //@ run-pass
 //@ compile-flags: -Cpanic=abort
 //@ edition: 2024
+//@ ignore-backends: gcc
 
 #![allow(incomplete_features)]
 #![feature(raw_dylib_elf)]
diff --git a/tests/ui/linking/no-gc-encapsulation-symbols.rs b/tests/ui/linking/no-gc-encapsulation-symbols.rs
index 36d69969199..c60f35b55eb 100644
--- a/tests/ui/linking/no-gc-encapsulation-symbols.rs
+++ b/tests/ui/linking/no-gc-encapsulation-symbols.rs
@@ -5,6 +5,7 @@
 //
 //@ build-pass
 //@ only-x86_64-unknown-linux-gnu
+//@ ignore-backends: gcc
 
 unsafe extern "Rust" {
     // The __start_ section name is magical for the linker,
diff --git a/tests/ui/lint/unused-qualification-in-derive-expansion.rs b/tests/ui/lint/unused-qualification-in-derive-expansion.rs
index b2067e22c44..bf095c6449d 100644
--- a/tests/ui/lint/unused-qualification-in-derive-expansion.rs
+++ b/tests/ui/lint/unused-qualification-in-derive-expansion.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: add-impl.rs
+//@ ignore-backends: gcc
 
 #![forbid(unused_qualifications)]
 
diff --git a/tests/ui/lto/debuginfo-lto-alloc.rs b/tests/ui/lto/debuginfo-lto-alloc.rs
index d6855f8760d..7c82d978a07 100644
--- a/tests/ui/lto/debuginfo-lto-alloc.rs
+++ b/tests/ui/lto/debuginfo-lto-alloc.rs
@@ -12,6 +12,7 @@
 //@ compile-flags: --test -C debuginfo=2 -C lto=fat
 //@ no-prefer-dynamic
 //@ incremental
+//@ ignore-backends: gcc
 
 extern crate alloc;
 
diff --git a/tests/ui/lto/debuginfo-lto.rs b/tests/ui/lto/debuginfo-lto.rs
index f189a1df056..6d8b836235c 100644
--- a/tests/ui/lto/debuginfo-lto.rs
+++ b/tests/ui/lto/debuginfo-lto.rs
@@ -7,6 +7,7 @@
 //@ aux-build:debuginfo-lto-aux.rs
 //@ compile-flags: -C lto -g
 //@ no-prefer-dynamic
+//@ ignore-backends: gcc
 
 extern crate debuginfo_lto_aux;
 
diff --git a/tests/ui/lto/dwarf-mixed-versions-lto.rs b/tests/ui/lto/dwarf-mixed-versions-lto.rs
index 900274eb22f..8ed3afa5e33 100644
--- a/tests/ui/lto/dwarf-mixed-versions-lto.rs
+++ b/tests/ui/lto/dwarf-mixed-versions-lto.rs
@@ -7,6 +7,7 @@
 //@ compile-flags: -C lto -g -Cdwarf-version=5
 //@ no-prefer-dynamic
 //@ build-pass
+//@ ignore-backends: gcc
 
 extern crate dwarf_mixed_versions_lto_aux;
 
diff --git a/tests/ui/lto/fat-lto.rs b/tests/ui/lto/fat-lto.rs
index 73d6801a25a..fe00d7feb37 100644
--- a/tests/ui/lto/fat-lto.rs
+++ b/tests/ui/lto/fat-lto.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ compile-flags: -Clto=fat
 //@ no-prefer-dynamic
+//@ ignore-backends: gcc
 
 fn main() {
     println!("hello!");
diff --git a/tests/ui/lto/issue-100772.rs b/tests/ui/lto/issue-100772.rs
index 9468e20894a..e07d44e3be8 100644
--- a/tests/ui/lto/issue-100772.rs
+++ b/tests/ui/lto/issue-100772.rs
@@ -3,6 +3,7 @@
 //@ compile-flags: -Ccodegen-units=1 -Clto -Ctarget-feature=-crt-static -Zsanitizer=cfi -C unsafe-allow-abi-mismatch=sanitizer
 //@ no-prefer-dynamic
 //@ only-x86_64-unknown-linux-gnu
+//@ ignore-backends: gcc
 
 #![feature(allocator_api)]
 
diff --git a/tests/ui/lto/lto-duplicate-symbols.rs b/tests/ui/lto/lto-duplicate-symbols.rs
index a62ab2e2217..08465eb0fb2 100644
--- a/tests/ui/lto/lto-duplicate-symbols.rs
+++ b/tests/ui/lto/lto-duplicate-symbols.rs
@@ -4,6 +4,7 @@
 //@ compile-flags: -C lto
 //@ no-prefer-dynamic
 //@ normalize-stderr: "lto-duplicate-symbols2\.lto_duplicate_symbols2\.[0-9a-zA-Z]+-cgu" -> "lto-duplicate-symbols2.lto_duplicate_symbols2.HASH-cgu"
+//@ ignore-backends: gcc
 extern crate lto_duplicate_symbols1;
 extern crate lto_duplicate_symbols2;
 
diff --git a/tests/ui/lto/lto-many-codegen-units.rs b/tests/ui/lto/lto-many-codegen-units.rs
index fb6636fb815..6761510e427 100644
--- a/tests/ui/lto/lto-many-codegen-units.rs
+++ b/tests/ui/lto/lto-many-codegen-units.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ compile-flags: -C lto -C codegen-units=8
 //@ no-prefer-dynamic
+//@ ignore-backends: gcc
 
 fn main() {
 }
diff --git a/tests/ui/lto/lto-rustc-loads-linker-plugin.rs b/tests/ui/lto/lto-rustc-loads-linker-plugin.rs
index 18e937cb29a..2be320f0bff 100644
--- a/tests/ui/lto/lto-rustc-loads-linker-plugin.rs
+++ b/tests/ui/lto/lto-rustc-loads-linker-plugin.rs
@@ -2,6 +2,7 @@
 //@ aux-build:lto-rustc-loads-linker-plugin.rs
 //@ run-pass
 //@ no-prefer-dynamic
+//@ ignore-backends: gcc
 
 // This test ensures that if a dependency was compiled with
 // `-Clinker-plugin-lto` then we can compile with `-Clto` and still link against
diff --git a/tests/ui/lto/lto-still-runs-thread-dtors.rs b/tests/ui/lto/lto-still-runs-thread-dtors.rs
index 900368496eb..9a97677773c 100644
--- a/tests/ui/lto/lto-still-runs-thread-dtors.rs
+++ b/tests/ui/lto/lto-still-runs-thread-dtors.rs
@@ -2,6 +2,7 @@
 //@ compile-flags: -C lto
 //@ no-prefer-dynamic
 //@ needs-threads
+//@ ignore-backends: gcc
 
 // FIXME(static_mut_refs): this could use an atomic
 #![allow(static_mut_refs)]
diff --git a/tests/ui/macros/same-sequence-span.rs b/tests/ui/macros/same-sequence-span.rs
index dfaf669a769..9fae847a4e2 100644
--- a/tests/ui/macros/same-sequence-span.rs
+++ b/tests/ui/macros/same-sequence-span.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: proc_macro_sequence.rs
+//@ ignore-backends: gcc
 
 // Regression test for issue #62831: Check that multiple sequences with the same span in the
 // left-hand side of a macro definition behave as if they had unique spans, and in particular that
diff --git a/tests/ui/macros/same-sequence-span.stderr b/tests/ui/macros/same-sequence-span.stderr
index 34df201f5a5..1ca89b6b595 100644
--- a/tests/ui/macros/same-sequence-span.stderr
+++ b/tests/ui/macros/same-sequence-span.stderr
@@ -1,5 +1,5 @@
 error: `$x:expr` may be followed by `$y:tt`, which is not allowed for `expr` fragments
-  --> $DIR/same-sequence-span.rs:14:18
+  --> $DIR/same-sequence-span.rs:15:18
    |
 LL |     (1 $x:expr $($y:tt,)*
    |                  ^^^^^ not allowed after `expr` fragments
@@ -7,7 +7,7 @@ LL |     (1 $x:expr $($y:tt,)*
    = note: allowed there are: `=>`, `,` or `;`
 
 error: `$x:expr` may be followed by `=`, which is not allowed for `expr` fragments
-  --> $DIR/same-sequence-span.rs:15:18
+  --> $DIR/same-sequence-span.rs:16:18
    |
 LL |                $(= $z:tt)*
    |                  ^ not allowed after `expr` fragments
@@ -15,10 +15,10 @@ LL |                $(= $z:tt)*
    = note: allowed there are: `=>`, `,` or `;`
 
 error: `$x:expr` may be followed by `$y:tt`, which is not allowed for `expr` fragments
-  --> $DIR/same-sequence-span.rs:19:1
+  --> $DIR/same-sequence-span.rs:20:1
    |
-LL | | macro_rules! manual_foo {
-   | |__________________________^not allowed after `expr` fragments
+LL | | // `proc_macro_sequence.rs`.
+   | |_____________________________^not allowed after `expr` fragments
 ...
 LL |   proc_macro_sequence::make_foo!();
    |   ^-------------------------------
@@ -30,7 +30,7 @@ LL |   proc_macro_sequence::make_foo!();
    = note: this error originates in the macro `proc_macro_sequence::make_foo` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `$x:expr` may be followed by `=`, which is not allowed for `expr` fragments
-  --> $DIR/same-sequence-span.rs:19:1
+  --> $DIR/same-sequence-span.rs:20:1
    |
 LL | proc_macro_sequence::make_foo!();
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not allowed after `expr` fragments
diff --git a/tests/ui/numbers-arithmetic/int-abs-overflow.rs b/tests/ui/numbers-arithmetic/int-abs-overflow.rs
index 6397f62d065..fd4a5a6052b 100644
--- a/tests/ui/numbers-arithmetic/int-abs-overflow.rs
+++ b/tests/ui/numbers-arithmetic/int-abs-overflow.rs
@@ -2,6 +2,7 @@
 //@ compile-flags: -C overflow-checks=on
 //@ needs-threads
 //@ needs-unwind
+//@ ignore-backends: gcc
 
 use std::thread;
 
diff --git a/tests/ui/numbers-arithmetic/issue-8460.rs b/tests/ui/numbers-arithmetic/issue-8460.rs
index 87867fdc93e..52df432669f 100644
--- a/tests/ui/numbers-arithmetic/issue-8460.rs
+++ b/tests/ui/numbers-arithmetic/issue-8460.rs
@@ -2,6 +2,7 @@
 #![allow(unused_must_use)]
 //@ needs-threads
 //@ needs-unwind
+//@ ignore-backends: gcc
 #![feature(rustc_attrs)]
 
 use std::thread;
diff --git a/tests/ui/panic-runtime/lto-unwind.rs b/tests/ui/panic-runtime/lto-unwind.rs
index 93275052f85..bafc6d5aaa5 100644
--- a/tests/ui/panic-runtime/lto-unwind.rs
+++ b/tests/ui/panic-runtime/lto-unwind.rs
@@ -3,6 +3,7 @@
 //@ needs-unwind
 //@ no-prefer-dynamic
 //@ needs-subprocess
+//@ ignore-backends: gcc
 
 use std::process::Command;
 use std::env;
diff --git a/tests/ui/panics/oom-panic-unwind.rs b/tests/ui/panics/oom-panic-unwind.rs
index 5974ad91406..4f7939ce60b 100644
--- a/tests/ui/panics/oom-panic-unwind.rs
+++ b/tests/ui/panics/oom-panic-unwind.rs
@@ -5,6 +5,7 @@
 //@ no-prefer-dynamic
 //@ needs-unwind
 //@ only-linux
+//@ ignore-backends: gcc
 
 use std::hint::black_box;
 use std::mem::forget;
diff --git a/tests/ui/panics/panic-handler-chain-update-hook.rs b/tests/ui/panics/panic-handler-chain-update-hook.rs
index 662ea9e978f..2ae79ad236e 100644
--- a/tests/ui/panics/panic-handler-chain-update-hook.rs
+++ b/tests/ui/panics/panic-handler-chain-update-hook.rs
@@ -3,6 +3,7 @@
 #![allow(stable_features)]
 
 //@ needs-threads
+//@ ignore-backends: gcc
 
 #![feature(std_panic)]
 #![feature(panic_update_hook)]
diff --git a/tests/ui/panics/panic-handler-chain.rs b/tests/ui/panics/panic-handler-chain.rs
index fea71ad9ec4..cc591c1d999 100644
--- a/tests/ui/panics/panic-handler-chain.rs
+++ b/tests/ui/panics/panic-handler-chain.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 #![allow(stable_features)]
 
 #![feature(std_panic)]
diff --git a/tests/ui/panics/panic-handler-flail-wildly.rs b/tests/ui/panics/panic-handler-flail-wildly.rs
index d42dfd68d9c..d5f5195d381 100644
--- a/tests/ui/panics/panic-handler-flail-wildly.rs
+++ b/tests/ui/panics/panic-handler-flail-wildly.rs
@@ -5,6 +5,7 @@
 #![allow(unused_must_use)]
 
 //@ needs-threads
+//@ ignore-backends: gcc
 
 #![feature(std_panic)]
 
diff --git a/tests/ui/panics/panic-handler-set-twice.rs b/tests/ui/panics/panic-handler-set-twice.rs
index 5f670d5f492..ca4ed65f568 100644
--- a/tests/ui/panics/panic-handler-set-twice.rs
+++ b/tests/ui/panics/panic-handler-set-twice.rs
@@ -6,6 +6,7 @@
 #![feature(std_panic)]
 
 //@ needs-threads
+//@ ignore-backends: gcc
 
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::panic;
diff --git a/tests/ui/panics/panic-in-dtor-drops-fields.rs b/tests/ui/panics/panic-in-dtor-drops-fields.rs
index 38eb6d0acfb..db079234337 100644
--- a/tests/ui/panics/panic-in-dtor-drops-fields.rs
+++ b/tests/ui/panics/panic-in-dtor-drops-fields.rs
@@ -4,6 +4,7 @@
 #![allow(non_upper_case_globals)]
 
 //@ needs-threads
+//@ ignore-backends: gcc
 
 use std::thread;
 
diff --git a/tests/ui/panics/panic-recover-propagate.rs b/tests/ui/panics/panic-recover-propagate.rs
index ef6ae4fd788..36ca279bdbd 100644
--- a/tests/ui/panics/panic-recover-propagate.rs
+++ b/tests/ui/panics/panic-recover-propagate.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::panic;
diff --git a/tests/ui/panics/rvalue-cleanup-during-box-panic.rs b/tests/ui/panics/rvalue-cleanup-during-box-panic.rs
index 84c5d85d7e0..03571f111aa 100644
--- a/tests/ui/panics/rvalue-cleanup-during-box-panic.rs
+++ b/tests/ui/panics/rvalue-cleanup-during-box-panic.rs
@@ -21,6 +21,7 @@
 // scenario worth testing.
 
 //@ needs-threads
+//@ ignore-backends: gcc
 
 use std::thread;
 
diff --git a/tests/ui/panics/unwind-force-no-unwind-tables.rs b/tests/ui/panics/unwind-force-no-unwind-tables.rs
index 2226e4dd03e..715f288fff1 100644
--- a/tests/ui/panics/unwind-force-no-unwind-tables.rs
+++ b/tests/ui/panics/unwind-force-no-unwind-tables.rs
@@ -6,6 +6,7 @@
 //@ needs-unwind
 //@ ignore-windows target requires uwtable
 //@ compile-flags: -C panic=unwind -C force-unwind-tables=n
+//@ ignore-backends: gcc
 
 use std::panic::{self, AssertUnwindSafe};
 
diff --git a/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.rs b/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.rs
index 461890e63e3..c82efe79e4d 100644
--- a/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.rs
+++ b/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: issue-89971-outer-attr-following-inner-attr-ice.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate issue_89971_outer_attr_following_inner_attr_ice;
diff --git a/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.stderr b/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.stderr
index 51df17c7cc6..392e7d0321f 100644
--- a/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.stderr
+++ b/tests/ui/parser/issues/issue-89971-outer-attr-following-inner-attr-ice.stderr
@@ -1,5 +1,5 @@
 error: an inner attribute is not permitted in this context
-  --> $DIR/issue-89971-outer-attr-following-inner-attr-ice.rs:11:1
+  --> $DIR/issue-89971-outer-attr-following-inner-attr-ice.rs:12:1
    |
 LL | #![deny(missing_docs)]
    | ^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/parser/macro/unicode-control-codepoints-macros.rs b/tests/ui/parser/macro/unicode-control-codepoints-macros.rs
index 775c5077976..701e7dfa30a 100644
--- a/tests/ui/parser/macro/unicode-control-codepoints-macros.rs
+++ b/tests/ui/parser/macro/unicode-control-codepoints-macros.rs
@@ -1,6 +1,7 @@
 // Regression test for #140281
 //@ edition: 2021
 //@ proc-macro: unicode-control.rs
+//@ ignore-backends: gcc
 
 extern crate unicode_control;
 use unicode_control::*;
diff --git a/tests/ui/parser/macro/unicode-control-codepoints-macros.stderr b/tests/ui/parser/macro/unicode-control-codepoints-macros.stderr
index ca813399eac..22fb1b945c6 100644
--- a/tests/ui/parser/macro/unicode-control-codepoints-macros.stderr
+++ b/tests/ui/parser/macro/unicode-control-codepoints-macros.stderr
@@ -1,5 +1,5 @@
 error: unicode codepoint changing visible direction of text present in doc comment
-  --> $DIR/unicode-control-codepoints-macros.rs:20:9
+  --> $DIR/unicode-control-codepoints-macros.rs:21:9
    |
 LL |         /// �test� RTL in doc in vec
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this doc comment contains invisible unicode text flow control codepoints
@@ -10,7 +10,7 @@ LL |         /// �test� RTL in doc in vec
    = note: `#[deny(text_direction_codepoint_in_literal)]` on by default
 
 error: unicode codepoint changing visible direction of text present in doc comment
-  --> $DIR/unicode-control-codepoints-macros.rs:25:9
+  --> $DIR/unicode-control-codepoints-macros.rs:26:9
    |
 LL | /         /**
 LL | |          * �test� RTL in doc in macro
@@ -22,7 +22,7 @@ LL | |          */
    = note: if you want to keep them but make them visible in your source code, you can escape them: '\u{202e}', '\u{2066}'
 
 error: unicode codepoint changing visible direction of text present in doc comment
-  --> $DIR/unicode-control-codepoints-macros.rs:32:9
+  --> $DIR/unicode-control-codepoints-macros.rs:33:9
    |
 LL | /         /**
 LL | |          * �test� RTL in doc in macro
@@ -34,7 +34,7 @@ LL | |          */
    = note: if you want to keep them but make them visible in your source code, you can escape them: '\u{202e}', '\u{2066}'
 
 error: unicode codepoint changing visible direction of text present in doc comment
-  --> $DIR/unicode-control-codepoints-macros.rs:40:9
+  --> $DIR/unicode-control-codepoints-macros.rs:41:9
    |
 LL |         /// �test� RTL in doc in proc macro
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this doc comment contains invisible unicode text flow control codepoints
@@ -44,7 +44,7 @@ LL |         /// �test� RTL in doc in proc macro
    = note: if you want to keep them but make them visible in your source code, you can escape them: '\u{202e}', '\u{2066}'
 
 error: unicode codepoint changing visible direction of text present in doc comment
-  --> $DIR/unicode-control-codepoints-macros.rs:45:9
+  --> $DIR/unicode-control-codepoints-macros.rs:46:9
    |
 LL |         /// �test� RTL in doc in proc macro
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this doc comment contains invisible unicode text flow control codepoints
diff --git a/tests/ui/parser/tuple-index-suffix-proc-macro.rs b/tests/ui/parser/tuple-index-suffix-proc-macro.rs
index 557c67738d3..2463897381e 100644
--- a/tests/ui/parser/tuple-index-suffix-proc-macro.rs
+++ b/tests/ui/parser/tuple-index-suffix-proc-macro.rs
@@ -3,6 +3,7 @@
 //! Like `tuple-index-suffix.rs`, but exercises the proc-macro interaction.
 
 //@ proc-macro: tuple-index-suffix-proc-macro-aux.rs
+//@ ignore-backends: gcc
 
 extern crate tuple_index_suffix_proc_macro_aux;
 use tuple_index_suffix_proc_macro_aux as aux;
diff --git a/tests/ui/parser/tuple-index-suffix-proc-macro.stderr b/tests/ui/parser/tuple-index-suffix-proc-macro.stderr
index 47d179d3555..a242af5a789 100644
--- a/tests/ui/parser/tuple-index-suffix-proc-macro.stderr
+++ b/tests/ui/parser/tuple-index-suffix-proc-macro.stderr
@@ -1,23 +1,23 @@
 error: suffixes on a tuple index are invalid
-  --> $DIR/tuple-index-suffix-proc-macro.rs:17:28
+  --> $DIR/tuple-index-suffix-proc-macro.rs:18:28
    |
 LL |     aux::bad_tup_indexing!(0usize);
    |                            ^^^^^^ invalid suffix `usize`
 
 error: suffixes on a tuple index are invalid
-  --> $DIR/tuple-index-suffix-proc-macro.rs:19:47
+  --> $DIR/tuple-index-suffix-proc-macro.rs:20:47
    |
 LL |     aux::bad_tup_struct_indexing!(tup_struct, 0isize);
    |                                               ^^^^^^ invalid suffix `isize`
 
 error: suffixes on a tuple index are invalid
-  --> $DIR/tuple-index-suffix-proc-macro.rs:24:28
+  --> $DIR/tuple-index-suffix-proc-macro.rs:25:28
    |
 LL |     aux::bad_tup_indexing!(0u8);
    |                            ^^^ invalid suffix `u8`
 
 error: suffixes on a tuple index are invalid
-  --> $DIR/tuple-index-suffix-proc-macro.rs:26:47
+  --> $DIR/tuple-index-suffix-proc-macro.rs:27:47
    |
 LL |     aux::bad_tup_struct_indexing!(tup_struct, 0u64);
    |                                               ^^^^ invalid suffix `u64`
diff --git a/tests/ui/proc-macro/add-impl.rs b/tests/ui/proc-macro/add-impl.rs
index 2299f05c2e7..645e9321bba 100644
--- a/tests/ui/proc-macro/add-impl.rs
+++ b/tests/ui/proc-macro/add-impl.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: add-impl.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate add_impl;
diff --git a/tests/ui/proc-macro/ambiguous-builtin-attrs-test.rs b/tests/ui/proc-macro/ambiguous-builtin-attrs-test.rs
index 8ee2223822a..e580e0784b3 100644
--- a/tests/ui/proc-macro/ambiguous-builtin-attrs-test.rs
+++ b/tests/ui/proc-macro/ambiguous-builtin-attrs-test.rs
@@ -1,5 +1,6 @@
 //@ proc-macro: builtin-attrs.rs
 //@ compile-flags:--test
+//@ ignore-backends: gcc
 
 #![feature(decl_macro, test)]
 
diff --git a/tests/ui/proc-macro/ambiguous-builtin-attrs-test.stderr b/tests/ui/proc-macro/ambiguous-builtin-attrs-test.stderr
index 346cebf639d..e5de873cf31 100644
--- a/tests/ui/proc-macro/ambiguous-builtin-attrs-test.stderr
+++ b/tests/ui/proc-macro/ambiguous-builtin-attrs-test.stderr
@@ -1,5 +1,5 @@
 error[E0425]: cannot find value `NonExistent` in this scope
-  --> $DIR/ambiguous-builtin-attrs-test.rs:19:5
+  --> $DIR/ambiguous-builtin-attrs-test.rs:20:5
    |
 LL |     NonExistent;
    |     ^^^^^^^^^^^ not found in this scope
diff --git a/tests/ui/proc-macro/ambiguous-builtin-attrs.rs b/tests/ui/proc-macro/ambiguous-builtin-attrs.rs
index edc7748eff3..63d3c79055c 100644
--- a/tests/ui/proc-macro/ambiguous-builtin-attrs.rs
+++ b/tests/ui/proc-macro/ambiguous-builtin-attrs.rs
@@ -1,5 +1,6 @@
 //@ edition:2018
 //@ proc-macro: builtin-attrs.rs
+//@ ignore-backends: gcc
 #![feature(decl_macro)] //~ ERROR `feature` is ambiguous
 
 extern crate builtin_attrs;
diff --git a/tests/ui/proc-macro/ambiguous-builtin-attrs.stderr b/tests/ui/proc-macro/ambiguous-builtin-attrs.stderr
index 0f4ddc065a7..ff7894a41ea 100644
--- a/tests/ui/proc-macro/ambiguous-builtin-attrs.stderr
+++ b/tests/ui/proc-macro/ambiguous-builtin-attrs.stderr
@@ -1,11 +1,11 @@
 error[E0425]: cannot find value `NonExistent` in this scope
-  --> $DIR/ambiguous-builtin-attrs.rs:34:5
+  --> $DIR/ambiguous-builtin-attrs.rs:35:5
    |
 LL |     NonExistent;
    |     ^^^^^^^^^^^ not found in this scope
 
 error[E0659]: `repr` is ambiguous
-  --> $DIR/ambiguous-builtin-attrs.rs:9:3
+  --> $DIR/ambiguous-builtin-attrs.rs:10:3
    |
 LL | #[repr(C)]
    |   ^^^^ ambiguous name
@@ -13,14 +13,14 @@ LL | #[repr(C)]
    = note: ambiguous because of a name conflict with a builtin attribute
    = note: `repr` could refer to a built-in attribute
 note: `repr` could also refer to the attribute macro imported here
-  --> $DIR/ambiguous-builtin-attrs.rs:6:5
+  --> $DIR/ambiguous-builtin-attrs.rs:7:5
    |
 LL | use builtin_attrs::*;
    |     ^^^^^^^^^^^^^^^^
    = help: use `crate::repr` to refer to this attribute macro unambiguously
 
 error[E0659]: `repr` is ambiguous
-  --> $DIR/ambiguous-builtin-attrs.rs:11:19
+  --> $DIR/ambiguous-builtin-attrs.rs:12:19
    |
 LL | #[cfg_attr(all(), repr(C))]
    |                   ^^^^ ambiguous name
@@ -28,14 +28,14 @@ LL | #[cfg_attr(all(), repr(C))]
    = note: ambiguous because of a name conflict with a builtin attribute
    = note: `repr` could refer to a built-in attribute
 note: `repr` could also refer to the attribute macro imported here
-  --> $DIR/ambiguous-builtin-attrs.rs:6:5
+  --> $DIR/ambiguous-builtin-attrs.rs:7:5
    |
 LL | use builtin_attrs::*;
    |     ^^^^^^^^^^^^^^^^
    = help: use `crate::repr` to refer to this attribute macro unambiguously
 
 error[E0659]: `repr` is ambiguous
-  --> $DIR/ambiguous-builtin-attrs.rs:20:34
+  --> $DIR/ambiguous-builtin-attrs.rs:21:34
    |
 LL | fn non_macro_expanded_location<#[repr(C)] T>() {
    |                                  ^^^^ ambiguous name
@@ -43,14 +43,14 @@ LL | fn non_macro_expanded_location<#[repr(C)] T>() {
    = note: ambiguous because of a name conflict with a builtin attribute
    = note: `repr` could refer to a built-in attribute
 note: `repr` could also refer to the attribute macro imported here
-  --> $DIR/ambiguous-builtin-attrs.rs:6:5
+  --> $DIR/ambiguous-builtin-attrs.rs:7:5
    |
 LL | use builtin_attrs::*;
    |     ^^^^^^^^^^^^^^^^
    = help: use `crate::repr` to refer to this attribute macro unambiguously
 
 error[E0659]: `repr` is ambiguous
-  --> $DIR/ambiguous-builtin-attrs.rs:24:11
+  --> $DIR/ambiguous-builtin-attrs.rs:25:11
    |
 LL |         #[repr(C)]
    |           ^^^^ ambiguous name
@@ -58,14 +58,14 @@ LL |         #[repr(C)]
    = note: ambiguous because of a name conflict with a builtin attribute
    = note: `repr` could refer to a built-in attribute
 note: `repr` could also refer to the attribute macro imported here
-  --> $DIR/ambiguous-builtin-attrs.rs:6:5
+  --> $DIR/ambiguous-builtin-attrs.rs:7:5
    |
 LL | use builtin_attrs::*;
    |     ^^^^^^^^^^^^^^^^
    = help: use `crate::repr` to refer to this attribute macro unambiguously
 
 error[E0659]: `allow` is ambiguous
-  --> $DIR/ambiguous-builtin-attrs.rs:38:3
+  --> $DIR/ambiguous-builtin-attrs.rs:39:3
    |
 LL | #[allow(unused)]
    |   ^^^^^ ambiguous name
@@ -73,14 +73,14 @@ LL | #[allow(unused)]
    = note: ambiguous because of a name conflict with a builtin attribute
    = note: `allow` could refer to a built-in attribute
 note: `allow` could also refer to the built-in attribute imported here
-  --> $DIR/ambiguous-builtin-attrs.rs:37:5
+  --> $DIR/ambiguous-builtin-attrs.rs:38:5
    |
 LL | use deny as allow;
    |     ^^^^^^^^^^^^^
    = help: use `crate::allow` to refer to this built-in attribute unambiguously
 
 error[E0659]: `feature` is ambiguous
-  --> $DIR/ambiguous-builtin-attrs.rs:3:4
+  --> $DIR/ambiguous-builtin-attrs.rs:4:4
    |
 LL | #![feature(decl_macro)]
    |    ^^^^^^^ ambiguous name
@@ -88,20 +88,20 @@ LL | #![feature(decl_macro)]
    = note: ambiguous because of a name conflict with a builtin attribute
    = note: `feature` could refer to a built-in attribute
 note: `feature` could also refer to the attribute macro imported here
-  --> $DIR/ambiguous-builtin-attrs.rs:6:5
+  --> $DIR/ambiguous-builtin-attrs.rs:7:5
    |
 LL | use builtin_attrs::*;
    |     ^^^^^^^^^^^^^^^^
    = help: use `crate::feature` to refer to this attribute macro unambiguously
 
 error[E0517]: attribute should be applied to a struct, enum, or union
-  --> $DIR/ambiguous-builtin-attrs.rs:20:39
+  --> $DIR/ambiguous-builtin-attrs.rs:21:39
    |
 LL | fn non_macro_expanded_location<#[repr(C)] T>() {
    |                                       ^   - not a struct, enum, or union
 
 error[E0517]: attribute should be applied to a struct, enum, or union
-  --> $DIR/ambiguous-builtin-attrs.rs:24:16
+  --> $DIR/ambiguous-builtin-attrs.rs:25:16
    |
 LL |         #[repr(C)]
    |                ^
diff --git a/tests/ui/proc-macro/append-impl.rs b/tests/ui/proc-macro/append-impl.rs
index c0f208460b2..48d21968de0 100644
--- a/tests/ui/proc-macro/append-impl.rs
+++ b/tests/ui/proc-macro/append-impl.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: append-impl.rs
+//@ ignore-backends: gcc
 
 #![allow(warnings)]
 
diff --git a/tests/ui/proc-macro/attr-args.rs b/tests/ui/proc-macro/attr-args.rs
index 1d3e0f725d2..4109b450a8a 100644
--- a/tests/ui/proc-macro/attr-args.rs
+++ b/tests/ui/proc-macro/attr-args.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: attr-args.rs
+//@ ignore-backends: gcc
 
 #![allow(warnings)]
 
diff --git a/tests/ui/proc-macro/attr-invalid-exprs.rs b/tests/ui/proc-macro/attr-invalid-exprs.rs
index f476858a32b..bdfc0587b3b 100644
--- a/tests/ui/proc-macro/attr-invalid-exprs.rs
+++ b/tests/ui/proc-macro/attr-invalid-exprs.rs
@@ -1,6 +1,7 @@
 //! Attributes producing expressions in invalid locations
 
 //@ proc-macro: attr-stmt-expr.rs
+//@ ignore-backends: gcc
 
 #![feature(proc_macro_hygiene)]
 #![feature(stmt_expr_attributes)]
diff --git a/tests/ui/proc-macro/attr-invalid-exprs.stderr b/tests/ui/proc-macro/attr-invalid-exprs.stderr
index 0d500c87145..43241e1e6fd 100644
--- a/tests/ui/proc-macro/attr-invalid-exprs.stderr
+++ b/tests/ui/proc-macro/attr-invalid-exprs.stderr
@@ -1,11 +1,11 @@
 error: expected expression, found end of macro arguments
-  --> $DIR/attr-invalid-exprs.rs:12:13
+  --> $DIR/attr-invalid-exprs.rs:13:13
    |
 LL |     let _ = #[no_output] "Hello, world!";
    |             ^^^^^^^^^^^^
 
 error: macro expansion ignores `,` and any tokens following
-  --> $DIR/attr-invalid-exprs.rs:15:13
+  --> $DIR/attr-invalid-exprs.rs:16:13
    |
 LL |     let _ = #[duplicate] "Hello, world!";
    |             ^^^^^^^^^^^^ caused by the macro expansion here
@@ -17,7 +17,7 @@ LL |     let _ = #[duplicate]; "Hello, world!";
    |                         +
 
 error: macro expansion ignores `,` and any tokens following
-  --> $DIR/attr-invalid-exprs.rs:24:9
+  --> $DIR/attr-invalid-exprs.rs:25:9
    |
 LL |         #[duplicate]
    |         ^^^^^^^^^^^^ caused by the macro expansion here
diff --git a/tests/ui/proc-macro/attr-on-trait.rs b/tests/ui/proc-macro/attr-on-trait.rs
index e95760a837c..345653864f8 100644
--- a/tests/ui/proc-macro/attr-on-trait.rs
+++ b/tests/ui/proc-macro/attr-on-trait.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: attr-on-trait.rs
+//@ ignore-backends: gcc
 
 extern crate attr_on_trait;
 
diff --git a/tests/ui/proc-macro/bang-macro.rs b/tests/ui/proc-macro/bang-macro.rs
index 2287e34c5dd..75f40de242e 100644
--- a/tests/ui/proc-macro/bang-macro.rs
+++ b/tests/ui/proc-macro/bang-macro.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: bang-macro.rs
+//@ ignore-backends: gcc
 
 extern crate bang_macro;
 use bang_macro::rewrite;
diff --git a/tests/ui/proc-macro/call-site.rs b/tests/ui/proc-macro/call-site.rs
index 9c285e1ed11..5de4061b2a9 100644
--- a/tests/ui/proc-macro/call-site.rs
+++ b/tests/ui/proc-macro/call-site.rs
@@ -1,5 +1,6 @@
 //@ check-pass
 //@ proc-macro: call-site.rs
+//@ ignore-backends: gcc
 
 extern crate call_site;
 
diff --git a/tests/ui/proc-macro/count_compound_ops.rs b/tests/ui/proc-macro/count_compound_ops.rs
index 20b0b87817e..fe90e7bfbe4 100644
--- a/tests/ui/proc-macro/count_compound_ops.rs
+++ b/tests/ui/proc-macro/count_compound_ops.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: count_compound_ops.rs
+//@ ignore-backends: gcc
 
 extern crate count_compound_ops;
 use count_compound_ops::count_compound_ops;
diff --git a/tests/ui/proc-macro/derive-bad.rs b/tests/ui/proc-macro/derive-bad.rs
index 9b237c731db..9b9a2bc33c9 100644
--- a/tests/ui/proc-macro/derive-bad.rs
+++ b/tests/ui/proc-macro/derive-bad.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: derive-bad.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate derive_bad;
diff --git a/tests/ui/proc-macro/derive-bad.stderr b/tests/ui/proc-macro/derive-bad.stderr
index 43e97f40ba8..8a252e826ef 100644
--- a/tests/ui/proc-macro/derive-bad.stderr
+++ b/tests/ui/proc-macro/derive-bad.stderr
@@ -1,5 +1,5 @@
 error: expected `:`, found `}`
-  --> $DIR/derive-bad.rs:6:10
+  --> $DIR/derive-bad.rs:7:10
    |
 LL | #[derive(A)]
    |          ^
@@ -10,13 +10,13 @@ LL | #[derive(A)]
    = note: this error originates in the derive macro `A` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: proc-macro derive produced unparsable tokens
-  --> $DIR/derive-bad.rs:6:10
+  --> $DIR/derive-bad.rs:7:10
    |
 LL | #[derive(A)]
    |          ^
 
 error[E0428]: the name `A` is defined multiple times
-  --> $DIR/derive-bad.rs:9:1
+  --> $DIR/derive-bad.rs:10:1
    |
 LL | #[derive(A)]
    |          - previous definition of the type `A` here
diff --git a/tests/ui/proc-macro/derive-helper-shadowing.rs b/tests/ui/proc-macro/derive-helper-shadowing.rs
index ee883be3352..5ddd914d102 100644
--- a/tests/ui/proc-macro/derive-helper-shadowing.rs
+++ b/tests/ui/proc-macro/derive-helper-shadowing.rs
@@ -1,6 +1,7 @@
 //@ edition:2018
 //@ proc-macro: test-macros.rs
 //@ proc-macro: derive-helper-shadowing.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate test_macros;
diff --git a/tests/ui/proc-macro/derive-helper-shadowing.stderr b/tests/ui/proc-macro/derive-helper-shadowing.stderr
index 2e4ddd19b7e..90b42e8d6e2 100644
--- a/tests/ui/proc-macro/derive-helper-shadowing.stderr
+++ b/tests/ui/proc-macro/derive-helper-shadowing.stderr
@@ -1,17 +1,17 @@
 error: cannot use a derive helper attribute through an import
-  --> $DIR/derive-helper-shadowing.rs:42:15
+  --> $DIR/derive-helper-shadowing.rs:43:15
    |
 LL |             #[renamed]
    |               ^^^^^^^
    |
 note: the derive helper attribute imported here
-  --> $DIR/derive-helper-shadowing.rs:41:17
+  --> $DIR/derive-helper-shadowing.rs:42:17
    |
 LL |             use empty_helper as renamed;
    |                 ^^^^^^^^^^^^^^^^^^^^^^^
 
 error: cannot find attribute `empty_helper` in this scope
-  --> $DIR/derive-helper-shadowing.rs:38:22
+  --> $DIR/derive-helper-shadowing.rs:39:22
    |
 LL |             #[derive(GenHelperUse)]
    |                      ^^^^^^^^^^^^
@@ -24,7 +24,7 @@ LL +             use empty_helper;
    |
 
 error: cannot find attribute `empty_helper` in this scope
-  --> $DIR/derive-helper-shadowing.rs:14:11
+  --> $DIR/derive-helper-shadowing.rs:15:11
    |
 LL |         #[empty_helper]
    |           ^^^^^^^^^^^^
@@ -40,26 +40,26 @@ LL +             use crate::empty_helper;
    |
 
 error[E0659]: `empty_helper` is ambiguous
-  --> $DIR/derive-helper-shadowing.rs:19:3
+  --> $DIR/derive-helper-shadowing.rs:20:3
    |
 LL | #[empty_helper]
    |   ^^^^^^^^^^^^ ambiguous name
    |
    = note: ambiguous because of a name conflict with a derive helper attribute
 note: `empty_helper` could refer to the derive helper attribute defined here
-  --> $DIR/derive-helper-shadowing.rs:22:10
+  --> $DIR/derive-helper-shadowing.rs:23:10
    |
 LL | #[derive(Empty)]
    |          ^^^^^
 note: `empty_helper` could also refer to the attribute macro imported here
-  --> $DIR/derive-helper-shadowing.rs:10:5
+  --> $DIR/derive-helper-shadowing.rs:11:5
    |
 LL | use test_macros::empty_attr as empty_helper;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = help: use `crate::empty_helper` to refer to this attribute macro unambiguously
 
 error: derive helper attribute is used before it is introduced
-  --> $DIR/derive-helper-shadowing.rs:19:3
+  --> $DIR/derive-helper-shadowing.rs:20:3
    |
 LL | #[empty_helper]
    |   ^^^^^^^^^^^^
@@ -76,7 +76,7 @@ error: aborting due to 5 previous errors
 For more information about this error, try `rustc --explain E0659`.
 Future incompatibility report: Future breakage diagnostic:
 error: derive helper attribute is used before it is introduced
-  --> $DIR/derive-helper-shadowing.rs:19:3
+  --> $DIR/derive-helper-shadowing.rs:20:3
    |
 LL | #[empty_helper]
    |   ^^^^^^^^^^^^
diff --git a/tests/ui/proc-macro/derive-same-struct.rs b/tests/ui/proc-macro/derive-same-struct.rs
index f7669ba1480..04ab08dc76e 100644
--- a/tests/ui/proc-macro/derive-same-struct.rs
+++ b/tests/ui/proc-macro/derive-same-struct.rs
@@ -3,6 +3,7 @@
 #![allow(path_statements)]
 #![allow(dead_code)]
 //@ proc-macro: derive-same-struct.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate derive_same_struct;
diff --git a/tests/ui/proc-macro/edition-imports-2018.rs b/tests/ui/proc-macro/edition-imports-2018.rs
index a3808d9dce8..af9eed74adb 100644
--- a/tests/ui/proc-macro/edition-imports-2018.rs
+++ b/tests/ui/proc-macro/edition-imports-2018.rs
@@ -1,6 +1,7 @@
 //@ check-pass
 //@ edition:2018
 //@ proc-macro: edition-imports-2015.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate edition_imports_2015;
diff --git a/tests/ui/proc-macro/env.rs b/tests/ui/proc-macro/env.rs
index 94e3b09e526..fc248f88359 100644
--- a/tests/ui/proc-macro/env.rs
+++ b/tests/ui/proc-macro/env.rs
@@ -2,6 +2,7 @@
 //@ run-pass
 //@ rustc-env: THE_CONST=1
 //@ compile-flags: -Zunstable-options --env-set THE_CONST=12 --env-set ANOTHER=4
+//@ ignore-backends: gcc
 
 #![crate_name = "foo"]
 
diff --git a/tests/ui/proc-macro/expand-expr.rs b/tests/ui/proc-macro/expand-expr.rs
index 8a4ed9768d5..1e058abe3bc 100644
--- a/tests/ui/proc-macro/expand-expr.rs
+++ b/tests/ui/proc-macro/expand-expr.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: expand-expr.rs
+//@ ignore-backends: gcc
 // no-remap-src-base: check_expand_expr_file!() fails when enabled.
 
 #![feature(concat_bytes)]
@@ -10,7 +11,7 @@ use expand_expr::{
 
 // Check builtin macros can be expanded.
 
-expand_expr_is!(13u32, line!());
+expand_expr_is!(14u32, line!());
 expand_expr_is!(24u32, column!());
 
 expand_expr_is!("Hello, World!", concat!("Hello, ", "World", "!"));
diff --git a/tests/ui/proc-macro/expand-expr.stderr b/tests/ui/proc-macro/expand-expr.stderr
index 8b1df177cfa..fd5f672adf5 100644
--- a/tests/ui/proc-macro/expand-expr.stderr
+++ b/tests/ui/proc-macro/expand-expr.stderr
@@ -1,29 +1,29 @@
 error: expected one of `.`, `?`, or an operator, found `;`
-  --> $DIR/expand-expr.rs:108:27
+  --> $DIR/expand-expr.rs:109:27
    |
 LL | expand_expr_fail!("string"; hello);
    |                           ^ expected one of `.`, `?`, or an operator
 
 error: expected expression, found `$`
-  --> $DIR/expand-expr.rs:111:19
+  --> $DIR/expand-expr.rs:112:19
    |
 LL | expand_expr_fail!($);
    |                   ^ expected expression
 
 error: expected expression, found `$`
-  --> $DIR/expand-expr.rs:112:29
+  --> $DIR/expand-expr.rs:113:29
    |
 LL | expand_expr_fail!(echo_tts!($));
    |                             ^ expected expression
 
 error: expected expression, found `$`
-  --> $DIR/expand-expr.rs:113:28
+  --> $DIR/expand-expr.rs:114:28
    |
 LL | expand_expr_fail!(echo_pm!($));
    |                            ^ expected expression
 
 error: macro expansion ignores `hello` and any tokens following
-  --> $DIR/expand-expr.rs:117:47
+  --> $DIR/expand-expr.rs:118:47
    |
 LL | expand_expr_is!("string", echo_tts!("string"; hello));
    |                           --------------------^^^^^- caused by the macro expansion here
@@ -35,7 +35,7 @@ LL | expand_expr_is!("string", echo_tts!("string"; hello););
    |                                                     +
 
 error: macro expansion ignores `;` and any tokens following
-  --> $DIR/expand-expr.rs:118:44
+  --> $DIR/expand-expr.rs:119:44
    |
 LL | expand_expr_is!("string", echo_pm!("string"; hello));
    |                           -----------------^------- caused by the macro expansion here
@@ -47,7 +47,7 @@ LL | expand_expr_is!("string", echo_pm!("string"; hello););
    |                                                    +
 
 error: recursion limit reached while expanding `recursive_expand!`
-  --> $DIR/expand-expr.rs:126:16
+  --> $DIR/expand-expr.rs:127:16
    |
 LL | const _: u32 = recursive_expand!();
    |                ^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/proc-macro/expand-to-unstable.rs b/tests/ui/proc-macro/expand-to-unstable.rs
index 8968471ebd8..37bfeab1fe7 100644
--- a/tests/ui/proc-macro/expand-to-unstable.rs
+++ b/tests/ui/proc-macro/expand-to-unstable.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: derive-unstable.rs
+//@ ignore-backends: gcc
 
 #![allow(warnings)]
 
diff --git a/tests/ui/proc-macro/expand-to-unstable.stderr b/tests/ui/proc-macro/expand-to-unstable.stderr
index 563c7ae8f95..255f80501ea 100644
--- a/tests/ui/proc-macro/expand-to-unstable.stderr
+++ b/tests/ui/proc-macro/expand-to-unstable.stderr
@@ -1,5 +1,5 @@
 error[E0658]: use of unstable library feature `core_intrinsics`: intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library
-  --> $DIR/expand-to-unstable.rs:8:10
+  --> $DIR/expand-to-unstable.rs:9:10
    |
 LL | #[derive(Unstable)]
    |          ^^^^^^^^
diff --git a/tests/ui/proc-macro/expand-with-a-macro.rs b/tests/ui/proc-macro/expand-with-a-macro.rs
index e5baf3601db..aa02cefbec6 100644
--- a/tests/ui/proc-macro/expand-with-a-macro.rs
+++ b/tests/ui/proc-macro/expand-with-a-macro.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ proc-macro: expand-with-a-macro.rs
+//@ ignore-backends: gcc
 
 
 #![deny(warnings)]
diff --git a/tests/ui/proc-macro/gen-macro-rules-hygiene.rs b/tests/ui/proc-macro/gen-macro-rules-hygiene.rs
index 3deec94fa34..fb7c830c2ed 100644
--- a/tests/ui/proc-macro/gen-macro-rules-hygiene.rs
+++ b/tests/ui/proc-macro/gen-macro-rules-hygiene.rs
@@ -3,6 +3,7 @@
 // `$crate` refers to the crate that defines `macro_rules` and not the outer transparent macro.
 
 //@ proc-macro: gen-macro-rules-hygiene.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate gen_macro_rules_hygiene;
diff --git a/tests/ui/proc-macro/gen-macro-rules-hygiene.stderr b/tests/ui/proc-macro/gen-macro-rules-hygiene.stderr
index df7c4f72eb0..e904b43aaae 100644
--- a/tests/ui/proc-macro/gen-macro-rules-hygiene.stderr
+++ b/tests/ui/proc-macro/gen-macro-rules-hygiene.stderr
@@ -1,5 +1,5 @@
 error[E0426]: use of undeclared label `'label_use`
-  --> $DIR/gen-macro-rules-hygiene.rs:12:1
+  --> $DIR/gen-macro-rules-hygiene.rs:13:1
    |
 LL | gen_macro_rules!();
    | ^^^^^^^^^^^^^^^^^^ undeclared label `'label_use`
@@ -10,7 +10,7 @@ LL |         generated!();
    = note: this error originates in the macro `generated` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0425]: cannot find value `local_use` in this scope
-  --> $DIR/gen-macro-rules-hygiene.rs:12:1
+  --> $DIR/gen-macro-rules-hygiene.rs:13:1
    |
 LL | gen_macro_rules!();
    | ^^^^^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `local_def`
@@ -21,7 +21,7 @@ LL |         generated!();
    = note: this error originates in the macro `generated` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0425]: cannot find value `local_def` in this scope
-  --> $DIR/gen-macro-rules-hygiene.rs:21:9
+  --> $DIR/gen-macro-rules-hygiene.rs:22:9
    |
 LL |         local_def;
    |         ^^^^^^^^^ help: a local variable with a similar name exists: `local_use`
diff --git a/tests/ui/proc-macro/gen-macro-rules.rs b/tests/ui/proc-macro/gen-macro-rules.rs
index 121d029e2e3..8ee38b2cc27 100644
--- a/tests/ui/proc-macro/gen-macro-rules.rs
+++ b/tests/ui/proc-macro/gen-macro-rules.rs
@@ -2,6 +2,7 @@
 
 //@ check-pass
 //@ proc-macro: gen-macro-rules.rs
+//@ ignore-backends: gcc
 
 extern crate gen_macro_rules as repro;
 
diff --git a/tests/ui/proc-macro/generate-mod.rs b/tests/ui/proc-macro/generate-mod.rs
index 729bfc1db66..0a1629e75ec 100644
--- a/tests/ui/proc-macro/generate-mod.rs
+++ b/tests/ui/proc-macro/generate-mod.rs
@@ -1,6 +1,7 @@
 // Modules generated by transparent proc macros still acts as barriers for names (issue #50504).
 
 //@ proc-macro: generate-mod.rs
+//@ ignore-backends: gcc
 
 extern crate generate_mod;
 
diff --git a/tests/ui/proc-macro/generate-mod.stderr b/tests/ui/proc-macro/generate-mod.stderr
index 142ff1abeed..03cf8c35188 100644
--- a/tests/ui/proc-macro/generate-mod.stderr
+++ b/tests/ui/proc-macro/generate-mod.stderr
@@ -1,5 +1,5 @@
 error[E0412]: cannot find type `FromOutside` in this scope
-  --> $DIR/generate-mod.rs:9:1
+  --> $DIR/generate-mod.rs:10:1
    |
 LL | generate_mod::check!();
    | ^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
@@ -9,7 +9,7 @@ LL | generate_mod::check!();
    = note: this error originates in the macro `generate_mod::check` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0412]: cannot find type `Outer` in this scope
-  --> $DIR/generate-mod.rs:9:1
+  --> $DIR/generate-mod.rs:10:1
    |
 LL | generate_mod::check!();
    | ^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
@@ -19,7 +19,7 @@ LL | generate_mod::check!();
    = note: this error originates in the macro `generate_mod::check` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0412]: cannot find type `FromOutside` in this scope
-  --> $DIR/generate-mod.rs:12:1
+  --> $DIR/generate-mod.rs:13:1
    |
 LL | #[generate_mod::check_attr]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
@@ -29,7 +29,7 @@ LL | #[generate_mod::check_attr]
    = note: this error originates in the attribute macro `generate_mod::check_attr` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0412]: cannot find type `OuterAttr` in this scope
-  --> $DIR/generate-mod.rs:12:1
+  --> $DIR/generate-mod.rs:13:1
    |
 LL | #[generate_mod::check_attr]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
@@ -39,7 +39,7 @@ LL | #[generate_mod::check_attr]
    = note: this error originates in the attribute macro `generate_mod::check_attr` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot find type `FromOutside` in this scope
-  --> $DIR/generate-mod.rs:16:10
+  --> $DIR/generate-mod.rs:17:10
    |
 LL | #[derive(generate_mod::CheckDerive)]
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -50,7 +50,7 @@ LL | #[derive(generate_mod::CheckDerive)]
    = note: this error originates in the derive macro `generate_mod::CheckDerive` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot find type `OuterDerive` in this scope
-  --> $DIR/generate-mod.rs:16:10
+  --> $DIR/generate-mod.rs:17:10
    |
 LL | #[derive(generate_mod::CheckDerive)]
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -60,7 +60,7 @@ LL | #[derive(generate_mod::CheckDerive)]
    = note: this error originates in the derive macro `generate_mod::CheckDerive` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot find type `FromOutside` in this scope
-  --> $DIR/generate-mod.rs:23:14
+  --> $DIR/generate-mod.rs:24:14
    |
 LL |     #[derive(generate_mod::CheckDerive)]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -70,7 +70,7 @@ LL |     #[derive(generate_mod::CheckDerive)]
    = note: this error originates in the derive macro `generate_mod::CheckDerive` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot find type `OuterDerive` in this scope
-  --> $DIR/generate-mod.rs:23:14
+  --> $DIR/generate-mod.rs:24:14
    |
 LL |     #[derive(generate_mod::CheckDerive)]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -84,7 +84,7 @@ error: aborting due to 8 previous errors
 For more information about this error, try `rustc --explain E0412`.
 Future incompatibility report: Future breakage diagnostic:
 error: cannot find type `FromOutside` in this scope
-  --> $DIR/generate-mod.rs:16:10
+  --> $DIR/generate-mod.rs:17:10
    |
 LL | #[derive(generate_mod::CheckDerive)]
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -96,7 +96,7 @@ LL | #[derive(generate_mod::CheckDerive)]
 
 Future breakage diagnostic:
 error: cannot find type `OuterDerive` in this scope
-  --> $DIR/generate-mod.rs:16:10
+  --> $DIR/generate-mod.rs:17:10
    |
 LL | #[derive(generate_mod::CheckDerive)]
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -108,7 +108,7 @@ LL | #[derive(generate_mod::CheckDerive)]
 
 Future breakage diagnostic:
 error: cannot find type `FromOutside` in this scope
-  --> $DIR/generate-mod.rs:23:14
+  --> $DIR/generate-mod.rs:24:14
    |
 LL |     #[derive(generate_mod::CheckDerive)]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -120,7 +120,7 @@ LL |     #[derive(generate_mod::CheckDerive)]
 
 Future breakage diagnostic:
 error: cannot find type `OuterDerive` in this scope
-  --> $DIR/generate-mod.rs:23:14
+  --> $DIR/generate-mod.rs:24:14
    |
 LL |     #[derive(generate_mod::CheckDerive)]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -132,7 +132,7 @@ LL |     #[derive(generate_mod::CheckDerive)]
 
 Future breakage diagnostic:
 warning: cannot find type `FromOutside` in this scope
-  --> $DIR/generate-mod.rs:30:10
+  --> $DIR/generate-mod.rs:31:10
    |
 LL | #[derive(generate_mod::CheckDeriveLint)] // OK, lint is suppressed
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
@@ -143,7 +143,7 @@ LL | #[derive(generate_mod::CheckDeriveLint)] // OK, lint is suppressed
 
 Future breakage diagnostic:
 warning: cannot find type `OuterDeriveLint` in this scope
-  --> $DIR/generate-mod.rs:30:10
+  --> $DIR/generate-mod.rs:31:10
    |
 LL | #[derive(generate_mod::CheckDeriveLint)] // OK, lint is suppressed
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ names from parent modules are not accessible without an explicit import
diff --git a/tests/ui/proc-macro/hygiene_example.rs b/tests/ui/proc-macro/hygiene_example.rs
index 84b5e345608..f74f22fb3b0 100644
--- a/tests/ui/proc-macro/hygiene_example.rs
+++ b/tests/ui/proc-macro/hygiene_example.rs
@@ -1,5 +1,6 @@
 //@ check-pass
 //@ aux-build:hygiene_example.rs
+//@ ignore-backends: gcc
 
 extern crate hygiene_example;
 use hygiene_example::hello;
diff --git a/tests/ui/proc-macro/is-available.rs b/tests/ui/proc-macro/is-available.rs
index faee560d7a9..9e9cf5d11b6 100644
--- a/tests/ui/proc-macro/is-available.rs
+++ b/tests/ui/proc-macro/is-available.rs
@@ -3,6 +3,7 @@
 extern crate proc_macro;
 
 //@ proc-macro: is-available.rs
+//@ ignore-backends: gcc
 extern crate is_available;
 
 fn main() {
diff --git a/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.rs b/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.rs
index abdd6bf136d..d420f2641da 100644
--- a/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.rs
+++ b/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: issue-104884.rs
+//@ ignore-backends: gcc
 
 use std::collections::BinaryHeap;
 
diff --git a/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.stderr b/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.stderr
index f3ed9e5761d..b7aed4a8485 100644
--- a/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.stderr
+++ b/tests/ui/proc-macro/issue-104884-trait-impl-sugg-err.stderr
@@ -1,11 +1,11 @@
 error[E0277]: can't compare `PriorityQueue<T>` with `PriorityQueue<T>`
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:13:10
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:14:10
    |
 LL | #[derive(PartialOrd, AddImpl)]
    |          ^^^^^^^^^^ no implementation for `PriorityQueue<T> == PriorityQueue<T>`
    |
 help: the trait `PartialEq` is not implemented for `PriorityQueue<T>`
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:20:1
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:21:1
    |
 LL | struct PriorityQueue<T>(BinaryHeap<PriorityQueueEntry<T>>);
    | ^^^^^^^^^^^^^^^^^^^^^^^
@@ -13,13 +13,13 @@ note: required by a bound in `PartialOrd`
   --> $SRC_DIR/core/src/cmp.rs:LL:COL
 
 error[E0277]: the trait bound `PriorityQueue<T>: Eq` is not satisfied
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:13:22
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:14:22
    |
 LL | #[derive(PartialOrd, AddImpl)]
    |                      ^^^^^^^ unsatisfied trait bound
    |
 help: the trait `Eq` is not implemented for `PriorityQueue<T>`
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:20:1
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:21:1
    |
 LL | struct PriorityQueue<T>(BinaryHeap<PriorityQueueEntry<T>>);
    | ^^^^^^^^^^^^^^^^^^^^^^^
@@ -28,13 +28,13 @@ note: required by a bound in `Ord`
    = note: this error originates in the derive macro `AddImpl` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: can't compare `T` with `T`
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:13:22
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:14:22
    |
 LL | #[derive(PartialOrd, AddImpl)]
    |                      ^^^^^^^ no implementation for `T < T` and `T > T`
    |
 note: required for `PriorityQueue<T>` to implement `PartialOrd`
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:13:10
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:14:10
    |
 LL | #[derive(PartialOrd, AddImpl)]
    |          ^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro
@@ -42,7 +42,7 @@ note: required by a bound in `Ord`
   --> $SRC_DIR/core/src/cmp.rs:LL:COL
 
 error[E0277]: can't compare `BinaryHeap<PriorityQueueEntry<T>>` with `_`
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:20:25
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:21:25
    |
 LL | #[derive(PartialOrd, AddImpl)]
    |          ---------- in this derive macro expansion
@@ -53,7 +53,7 @@ LL | struct PriorityQueue<T>(BinaryHeap<PriorityQueueEntry<T>>);
    = help: the trait `PartialOrd<_>` is not implemented for `BinaryHeap<PriorityQueueEntry<T>>`
 
 error[E0599]: no method named `cmp` found for struct `BinaryHeap<PriorityQueueEntry<T>>` in the current scope
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:13:22
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:14:22
    |
 LL | #[derive(PartialOrd, AddImpl)]
    |                      ^^^^^^^ `BinaryHeap<PriorityQueueEntry<T>>` is not an iterator
@@ -61,7 +61,7 @@ LL | #[derive(PartialOrd, AddImpl)]
    = note: this error originates in the derive macro `AddImpl` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0609]: no field `height` on type `&PriorityQueue<T>`
-  --> $DIR/issue-104884-trait-impl-sugg-err.rs:13:22
+  --> $DIR/issue-104884-trait-impl-sugg-err.rs:14:22
    |
 LL | #[derive(PartialOrd, AddImpl)]
    |                      ^^^^^^^ unknown field
diff --git a/tests/ui/proc-macro/issue-107113-wrap.rs b/tests/ui/proc-macro/issue-107113-wrap.rs
index 2799e79bb1c..a46cf893d90 100644
--- a/tests/ui/proc-macro/issue-107113-wrap.rs
+++ b/tests/ui/proc-macro/issue-107113-wrap.rs
@@ -1,5 +1,6 @@
 //@ edition:2021
 //@ proc-macro: issue-107113.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate issue_107113;
diff --git a/tests/ui/proc-macro/issue-107113-wrap.stderr b/tests/ui/proc-macro/issue-107113-wrap.stderr
index b541051147d..9b5b0333256 100644
--- a/tests/ui/proc-macro/issue-107113-wrap.stderr
+++ b/tests/ui/proc-macro/issue-107113-wrap.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-107113-wrap.rs:7:1
+  --> $DIR/issue-107113-wrap.rs:8:1
    |
 LL | #[issue_107113::main]
    | ^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/proc-macro/issue-118809.rs b/tests/ui/proc-macro/issue-118809.rs
index a6a3956981a..3ceede7e885 100644
--- a/tests/ui/proc-macro/issue-118809.rs
+++ b/tests/ui/proc-macro/issue-118809.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: issue-118809.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate issue_118809;
diff --git a/tests/ui/proc-macro/issue-118809.stderr b/tests/ui/proc-macro/issue-118809.stderr
index 30b09fd4006..98329fea119 100644
--- a/tests/ui/proc-macro/issue-118809.stderr
+++ b/tests/ui/proc-macro/issue-118809.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-118809.rs:6:10
+  --> $DIR/issue-118809.rs:7:10
    |
 LL | #[derive(Deserialize)]
    |          ^^^^^^^^^^^
@@ -8,7 +8,7 @@ LL | #[derive(Deserialize)]
    |          arguments to this enum variant are incorrect
    |
 help: the type constructed contains `u32` due to the type of the argument passed
-  --> $DIR/issue-118809.rs:6:10
+  --> $DIR/issue-118809.rs:7:10
    |
 LL | #[derive(Deserialize)]
    |          ^^^^^^^^^^^ this argument influences the type of `Some`
diff --git a/tests/ui/proc-macro/issue-38586.rs b/tests/ui/proc-macro/issue-38586.rs
index 88dbb8037be..c9623fd383b 100644
--- a/tests/ui/proc-macro/issue-38586.rs
+++ b/tests/ui/proc-macro/issue-38586.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: issue-38586.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate issue_38586;
diff --git a/tests/ui/proc-macro/issue-38586.stderr b/tests/ui/proc-macro/issue-38586.stderr
index 00491556450..e49d4c83e27 100644
--- a/tests/ui/proc-macro/issue-38586.stderr
+++ b/tests/ui/proc-macro/issue-38586.stderr
@@ -1,5 +1,5 @@
 error[E0425]: cannot find value `foo` in this scope
-  --> $DIR/issue-38586.rs:6:10
+  --> $DIR/issue-38586.rs:7:10
    |
 LL | #[derive(A)]
    |          ^ not found in this scope
diff --git a/tests/ui/proc-macro/issue-59191-replace-root-with-fn.rs b/tests/ui/proc-macro/issue-59191-replace-root-with-fn.rs
index df236cce6d2..988641b2b9c 100644
--- a/tests/ui/proc-macro/issue-59191-replace-root-with-fn.rs
+++ b/tests/ui/proc-macro/issue-59191-replace-root-with-fn.rs
@@ -4,6 +4,7 @@
 //@ edition:2018
 //@ proc-macro: issue-59191.rs
 //@ needs-unwind (affects error output)
+//@ ignore-backends: gcc
 
 #![feature(custom_inner_attributes)]
 #![issue_59191::no_main]
diff --git a/tests/ui/proc-macro/issue-79148.rs b/tests/ui/proc-macro/issue-79148.rs
index b2248759b5f..7ce6216c842 100644
--- a/tests/ui/proc-macro/issue-79148.rs
+++ b/tests/ui/proc-macro/issue-79148.rs
@@ -1,5 +1,6 @@
 //@ proc-macro: re-export.rs
 //@ edition:2018
+//@ ignore-backends: gcc
 
 extern crate re_export;
 
diff --git a/tests/ui/proc-macro/issue-79148.stderr b/tests/ui/proc-macro/issue-79148.stderr
index 8adc4c6e0db..80a5b1a0855 100644
--- a/tests/ui/proc-macro/issue-79148.stderr
+++ b/tests/ui/proc-macro/issue-79148.stderr
@@ -1,11 +1,11 @@
 error[E0364]: `Variant` is only public within the crate, and cannot be re-exported outside
-  --> $DIR/issue-79148.rs:8:1
+  --> $DIR/issue-79148.rs:9:1
    |
 LL | cause_ice!();
    | ^^^^^^^^^^^^
    |
 note: consider marking `Variant` as `pub` in the imported module
-  --> $DIR/issue-79148.rs:8:1
+  --> $DIR/issue-79148.rs:9:1
    |
 LL | cause_ice!();
    | ^^^^^^^^^^^^
diff --git a/tests/ui/proc-macro/issue-83510.rs b/tests/ui/proc-macro/issue-83510.rs
index 67469511fc3..d49e1867f1d 100644
--- a/tests/ui/proc-macro/issue-83510.rs
+++ b/tests/ui/proc-macro/issue-83510.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: issue-83510.rs
+//@ ignore-backends: gcc
 
 extern crate issue_83510;
 
diff --git a/tests/ui/proc-macro/issue-83510.stderr b/tests/ui/proc-macro/issue-83510.stderr
index e59b77af3dc..a7c3f5a1d5b 100644
--- a/tests/ui/proc-macro/issue-83510.stderr
+++ b/tests/ui/proc-macro/issue-83510.stderr
@@ -1,5 +1,5 @@
 error[E0412]: cannot find type `Foo` in this scope
-  --> $DIR/issue-83510.rs:5:1
+  --> $DIR/issue-83510.rs:6:1
    |
 LL | issue_83510::dance_like_you_want_to_ice!();
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
@@ -7,7 +7,7 @@ LL | issue_83510::dance_like_you_want_to_ice!();
    = note: this error originates in the macro `issue_83510::dance_like_you_want_to_ice` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0404]: expected trait, found struct `Box`
-  --> $DIR/issue-83510.rs:5:1
+  --> $DIR/issue-83510.rs:6:1
    |
 LL | issue_83510::dance_like_you_want_to_ice!();
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not a trait
@@ -15,7 +15,7 @@ LL | issue_83510::dance_like_you_want_to_ice!();
    = note: this error originates in the macro `issue_83510::dance_like_you_want_to_ice` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0405]: cannot find trait `Baz` in this scope
-  --> $DIR/issue-83510.rs:5:1
+  --> $DIR/issue-83510.rs:6:1
    |
 LL | issue_83510::dance_like_you_want_to_ice!();
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
@@ -23,7 +23,7 @@ LL | issue_83510::dance_like_you_want_to_ice!();
    = note: this error originates in the macro `issue_83510::dance_like_you_want_to_ice` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0658]: inherent associated types are unstable
-  --> $DIR/issue-83510.rs:5:1
+  --> $DIR/issue-83510.rs:6:1
    |
 LL | issue_83510::dance_like_you_want_to_ice!();
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/proc-macro/issue-91800.rs b/tests/ui/proc-macro/issue-91800.rs
index 8cecfad32b5..79cbf8632f0 100644
--- a/tests/ui/proc-macro/issue-91800.rs
+++ b/tests/ui/proc-macro/issue-91800.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: issue-91800-macro.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate issue_91800_macro;
diff --git a/tests/ui/proc-macro/issue-91800.stderr b/tests/ui/proc-macro/issue-91800.stderr
index 63ebc0a552e..be5a8ece384 100644
--- a/tests/ui/proc-macro/issue-91800.stderr
+++ b/tests/ui/proc-macro/issue-91800.stderr
@@ -1,5 +1,5 @@
 error: macros that expand to items must be delimited with braces or followed by a semicolon
-  --> $DIR/issue-91800.rs:6:10
+  --> $DIR/issue-91800.rs:7:10
    |
 LL | #[derive(MyTrait)]
    |          ^^^^^^^
@@ -7,13 +7,13 @@ LL | #[derive(MyTrait)]
    = note: this error originates in the derive macro `MyTrait` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: proc-macro derive produced unparsable tokens
-  --> $DIR/issue-91800.rs:6:10
+  --> $DIR/issue-91800.rs:7:10
    |
 LL | #[derive(MyTrait)]
    |          ^^^^^^^
 
 error: 
-  --> $DIR/issue-91800.rs:6:10
+  --> $DIR/issue-91800.rs:7:10
    |
 LL | #[derive(MyTrait)]
    |          ^^^^^^^
@@ -21,7 +21,7 @@ LL | #[derive(MyTrait)]
    = note: this error originates in the derive macro `MyTrait` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: macros that expand to items must be delimited with braces or followed by a semicolon
-  --> $DIR/issue-91800.rs:10:1
+  --> $DIR/issue-91800.rs:11:1
    |
 LL | #[attribute_macro]
    | ^^^^^^^^^^^^^^^^^^
@@ -29,7 +29,7 @@ LL | #[attribute_macro]
    = note: this error originates in the attribute macro `attribute_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: 
-  --> $DIR/issue-91800.rs:10:1
+  --> $DIR/issue-91800.rs:11:1
    |
 LL | #[attribute_macro]
    | ^^^^^^^^^^^^^^^^^^
@@ -37,7 +37,7 @@ LL | #[attribute_macro]
    = note: this error originates in the attribute macro `attribute_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: macros that expand to items must be delimited with braces or followed by a semicolon
-  --> $DIR/issue-91800.rs:15:1
+  --> $DIR/issue-91800.rs:16:1
    |
 LL | fn_macro! {}
    | ^^^^^^^^^^^^
@@ -45,7 +45,7 @@ LL | fn_macro! {}
    = note: this error originates in the macro `fn_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: 
-  --> $DIR/issue-91800.rs:15:1
+  --> $DIR/issue-91800.rs:16:1
    |
 LL | fn_macro! {}
    | ^^^^^^^^^^^^
diff --git a/tests/ui/proc-macro/lifetimes-rpass.rs b/tests/ui/proc-macro/lifetimes-rpass.rs
index c462b27722f..9b794e695cd 100644
--- a/tests/ui/proc-macro/lifetimes-rpass.rs
+++ b/tests/ui/proc-macro/lifetimes-rpass.rs
@@ -2,6 +2,7 @@
 
 #![allow(unused_variables)]
 //@ proc-macro: lifetimes-rpass.rs
+//@ ignore-backends: gcc
 
 extern crate lifetimes_rpass as lifetimes;
 use lifetimes::*;
diff --git a/tests/ui/proc-macro/lints_in_proc_macros.rs b/tests/ui/proc-macro/lints_in_proc_macros.rs
index 6714b8b6e1d..2c22c787982 100644
--- a/tests/ui/proc-macro/lints_in_proc_macros.rs
+++ b/tests/ui/proc-macro/lints_in_proc_macros.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: bang_proc_macro2.rs
+//@ ignore-backends: gcc
 
 extern crate bang_proc_macro2;
 
diff --git a/tests/ui/proc-macro/lints_in_proc_macros.stderr b/tests/ui/proc-macro/lints_in_proc_macros.stderr
index 244d218608b..016b236bda8 100644
--- a/tests/ui/proc-macro/lints_in_proc_macros.stderr
+++ b/tests/ui/proc-macro/lints_in_proc_macros.stderr
@@ -1,5 +1,5 @@
 error[E0425]: cannot find value `foobar2` in this scope
-  --> $DIR/lints_in_proc_macros.rs:9:5
+  --> $DIR/lints_in_proc_macros.rs:10:5
    |
 LL |     bang_proc_macro2!();
    |     ^^^^^^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `foobar`
diff --git a/tests/ui/proc-macro/load-two.rs b/tests/ui/proc-macro/load-two.rs
index 608379949e6..197e7845db3 100644
--- a/tests/ui/proc-macro/load-two.rs
+++ b/tests/ui/proc-macro/load-two.rs
@@ -4,6 +4,7 @@
 #![allow(dead_code)]
 //@ proc-macro: derive-atob.rs
 //@ proc-macro: derive-ctod.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate derive_atob;
diff --git a/tests/ui/proc-macro/macro-crate-multi-decorator.rs b/tests/ui/proc-macro/macro-crate-multi-decorator.rs
index c4f02e7adfc..e247c9526a4 100644
--- a/tests/ui/proc-macro/macro-crate-multi-decorator.rs
+++ b/tests/ui/proc-macro/macro-crate-multi-decorator.rs
@@ -2,6 +2,7 @@
 
 //@ check-pass
 //@ proc-macro: duplicate.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate duplicate;
diff --git a/tests/ui/proc-macro/macro_rules_edition_from_pm.rs b/tests/ui/proc-macro/macro_rules_edition_from_pm.rs
index 8fc7d909749..fc3ae3ef2c8 100644
--- a/tests/ui/proc-macro/macro_rules_edition_from_pm.rs
+++ b/tests/ui/proc-macro/macro_rules_edition_from_pm.rs
@@ -7,6 +7,7 @@
 //@[edition2021] edition:2021
 //@[edition2024] edition:2024
 //@ check-pass
+//@ ignore-backends: gcc
 
 // This checks how the expr fragment specifier works.
 macro_rules_edition_pm::make_edition_macro!{}
diff --git a/tests/ui/proc-macro/match-expander.rs b/tests/ui/proc-macro/match-expander.rs
index 23e5746c540..b7245c7e682 100644
--- a/tests/ui/proc-macro/match-expander.rs
+++ b/tests/ui/proc-macro/match-expander.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: match-expander.rs
+//@ ignore-backends: gcc
 // Ensure that we don't point at macro invocation when providing inference contexts.
 
 #[macro_use]
diff --git a/tests/ui/proc-macro/match-expander.stderr b/tests/ui/proc-macro/match-expander.stderr
index b77468ec60a..d2423336b1d 100644
--- a/tests/ui/proc-macro/match-expander.stderr
+++ b/tests/ui/proc-macro/match-expander.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/match-expander.rs:8:5
+  --> $DIR/match-expander.rs:9:5
    |
 LL |     match_expander::matcher!();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `S`, found `bool`
diff --git a/tests/ui/proc-macro/mixed-site-span.rs b/tests/ui/proc-macro/mixed-site-span.rs
index 442b440c121..98a022632cd 100644
--- a/tests/ui/proc-macro/mixed-site-span.rs
+++ b/tests/ui/proc-macro/mixed-site-span.rs
@@ -2,6 +2,7 @@
 
 //@ aux-build: token-site-span.rs
 //@ proc-macro: mixed-site-span.rs
+//@ ignore-backends: gcc
 
 extern crate mixed_site_span;
 extern crate token_site_span;
diff --git a/tests/ui/proc-macro/mixed-site-span.stderr b/tests/ui/proc-macro/mixed-site-span.stderr
index d62031a853c..2d2d55fe148 100644
--- a/tests/ui/proc-macro/mixed-site-span.stderr
+++ b/tests/ui/proc-macro/mixed-site-span.stderr
@@ -1,5 +1,5 @@
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:47:5
+  --> $DIR/mixed-site-span.rs:48:5
    |
 LL |     invoke_with_crate!{input proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -7,7 +7,7 @@ LL |     invoke_with_crate!{input proc_macro_item}
    = note: this error originates in the macro `invoke_with_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:48:5
+  --> $DIR/mixed-site-span.rs:49:5
    |
 LL |     invoke_with_ident!{input proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -15,7 +15,7 @@ LL |     invoke_with_ident!{input proc_macro_item}
    = note: this error originates in the macro `invoke_with_ident` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:49:5
+  --> $DIR/mixed-site-span.rs:50:5
    |
 LL |     invoke_with_crate!{call proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -23,7 +23,7 @@ LL |     invoke_with_crate!{call proc_macro_item}
    = note: this error originates in the macro `with_crate` which comes from the expansion of the macro `invoke_with_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:50:5
+  --> $DIR/mixed-site-span.rs:51:5
    |
 LL |     invoke_with_ident!{call proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -31,7 +31,7 @@ LL |     invoke_with_ident!{call proc_macro_item}
    = note: this error originates in the macro `with_crate` which comes from the expansion of the macro `invoke_with_ident` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:51:5
+  --> $DIR/mixed-site-span.rs:52:5
    |
 LL |     invoke_with_ident!{hello call proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -39,7 +39,7 @@ LL |     invoke_with_ident!{hello call proc_macro_item}
    = note: this error originates in the macro `with_crate` which comes from the expansion of the macro `invoke_with_ident` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate::proc_macro_item`
-  --> $DIR/mixed-site-span.rs:54:5
+  --> $DIR/mixed-site-span.rs:55:5
    |
 LL |     invoke_with_ident!{krate input proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^---------------^
@@ -50,7 +50,7 @@ LL |     invoke_with_ident!{krate input proc_macro_item}
    = note: this error originates in the macro `with_crate` which comes from the expansion of the macro `invoke_with_ident` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate::proc_macro_item`
-  --> $DIR/mixed-site-span.rs:55:5
+  --> $DIR/mixed-site-span.rs:56:5
    |
 LL |     with_crate!{krate input proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^---------------^
@@ -61,7 +61,7 @@ LL |     with_crate!{krate input proc_macro_item}
    = note: this error originates in the macro `with_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:56:5
+  --> $DIR/mixed-site-span.rs:57:5
    |
 LL |     with_crate!{krate call proc_macro_item}
    |     ^^^^^^^^^^^^^^^^^^^^^^^---------------^
@@ -72,7 +72,7 @@ LL |     with_crate!{krate call proc_macro_item}
    = note: this error originates in the macro `with_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:60:28
+  --> $DIR/mixed-site-span.rs:61:28
    |
 LL |         invoke_with_ident!{$crate input proc_macro_item}
    |                            ^^^^^^       --------------- help: a similar name exists in the module: `proc_macro_rules`
@@ -85,7 +85,7 @@ LL |     test!();
    = note: this error originates in the macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:61:21
+  --> $DIR/mixed-site-span.rs:62:21
    |
 LL |         with_crate!{$crate input proc_macro_item}
    |                     ^^^^^^       --------------- help: a similar name exists in the module: `proc_macro_rules`
@@ -98,7 +98,7 @@ LL |     test!();
    = note: this error originates in the macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:62:9
+  --> $DIR/mixed-site-span.rs:63:9
    |
 LL |         with_crate!{$crate call proc_macro_item}
    |         ^^^^^^^^^^^^^^^^^^^^^^^^---------------^
@@ -112,7 +112,7 @@ LL |     test!();
    = note: this error originates in the macro `with_crate` which comes from the expansion of the macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:67:5
+  --> $DIR/mixed-site-span.rs:68:5
    |
 LL |     test!();
    |     ^^^^^^^ no `proc_macro_item` in the root
@@ -120,7 +120,7 @@ LL |     test!();
    = note: this error originates in the macro `with_crate` which comes from the expansion of the macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate::TokenItem`
-  --> $DIR/mixed-site-span.rs:87:5
+  --> $DIR/mixed-site-span.rs:88:5
    |
 LL |     invoke_with_ident!{krate input TokenItem}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -133,7 +133,7 @@ LL |     quote!(use $krate::$ident as token_site_span::TokenItem as _;)
    |                                  +++++++++++++++++++++++++++++
 
 error[E0432]: unresolved import `$crate::TokenItem`
-  --> $DIR/mixed-site-span.rs:88:5
+  --> $DIR/mixed-site-span.rs:89:5
    |
 LL |     with_crate!{krate input TokenItem}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -146,7 +146,7 @@ LL |     quote!(use $krate::$ident as token_site_span::TokenItem as _;)
    |                                  +++++++++++++++++++++++++++++
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:89:5
+  --> $DIR/mixed-site-span.rs:90:5
    |
 LL |     with_crate!{krate call TokenItem}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -159,7 +159,7 @@ LL +     token_site_span::TokenItem as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:92:5
+  --> $DIR/mixed-site-span.rs:93:5
    |
 LL |     invoke_with_crate!{mixed TokenItem}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -173,7 +173,7 @@ LL +     ($s:ident $i:ident) => { token_site_span::TokenItem as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:93:5
+  --> $DIR/mixed-site-span.rs:94:5
    |
 LL |     invoke_with_ident!{mixed TokenItem}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -187,7 +187,7 @@ LL +     ($s:ident $i:ident) => { token_site_span::TokenItem as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:94:5
+  --> $DIR/mixed-site-span.rs:95:5
    |
 LL |     invoke_with_ident!{krate mixed TokenItem}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -201,7 +201,7 @@ LL +     ($m:ident $s:ident $i:ident) => { token_site_span::TokenItem as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:95:5
+  --> $DIR/mixed-site-span.rs:96:5
    |
 LL |     with_crate!{krate mixed TokenItem}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -214,7 +214,7 @@ LL +     token_site_span::TokenItem as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:99:28
+  --> $DIR/mixed-site-span.rs:100:28
    |
 LL |         invoke_with_ident!{$crate input TokenItem}
    |                            ^^^^^^ no `TokenItem` in the root
@@ -230,7 +230,7 @@ LL +         invoke_with_ident!{token_site_span::TokenItem as _ input TokenItem}
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:100:21
+  --> $DIR/mixed-site-span.rs:101:21
    |
 LL |         with_crate!{$crate input TokenItem}
    |                     ^^^^^^ no `TokenItem` in the root
@@ -246,7 +246,7 @@ LL +         with_crate!{token_site_span::TokenItem as _ input TokenItem}
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:101:9
+  --> $DIR/mixed-site-span.rs:102:9
    |
 LL |         with_crate!{$crate call TokenItem}
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -262,7 +262,7 @@ LL +         token_site_span::TokenItem as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:108:5
+  --> $DIR/mixed-site-span.rs:109:5
    |
 LL |     test!();
    |     ^^^^^^^ no `TokenItem` in the root
@@ -276,7 +276,7 @@ LL +     ($m:ident $s:ident $i:ident) => { token_site_span::TokenItem as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:105:9
+  --> $DIR/mixed-site-span.rs:106:9
    |
 LL |         with_crate!{$crate mixed TokenItem}
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -292,7 +292,7 @@ LL +         token_site_span::TokenItem as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:129:5
+  --> $DIR/mixed-site-span.rs:130:5
    |
 LL |     invoke_with_crate!{input ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -306,7 +306,7 @@ LL +     ($s:ident $i:ident) => { with_crate!{ItemUse as _ $s $i} };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:130:5
+  --> $DIR/mixed-site-span.rs:131:5
    |
 LL |     invoke_with_ident!{input ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -320,7 +320,7 @@ LL +     ($s:ident $i:ident) => { with_crate!{ItemUse as _ $s $i} };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:133:5
+  --> $DIR/mixed-site-span.rs:134:5
    |
 LL |     invoke_with_crate!{mixed ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -334,7 +334,7 @@ LL +     ($s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:134:5
+  --> $DIR/mixed-site-span.rs:135:5
    |
 LL |     invoke_with_ident!{mixed ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -348,7 +348,7 @@ LL +     ($s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:135:5
+  --> $DIR/mixed-site-span.rs:136:5
    |
 LL |     invoke_with_ident!{krate mixed ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -362,7 +362,7 @@ LL +     ($m:ident $s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:136:5
+  --> $DIR/mixed-site-span.rs:137:5
    |
 LL |     with_crate!{krate mixed ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -375,7 +375,7 @@ LL +     ItemUse as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:138:5
+  --> $DIR/mixed-site-span.rs:139:5
    |
 LL |     invoke_with_crate!{call ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -389,7 +389,7 @@ LL +     ($s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:139:5
+  --> $DIR/mixed-site-span.rs:140:5
    |
 LL |     invoke_with_ident!{call ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -403,7 +403,7 @@ LL +     ($s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:140:5
+  --> $DIR/mixed-site-span.rs:141:5
    |
 LL |     invoke_with_ident!{hello call ItemUse}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -417,7 +417,7 @@ LL +     ($m:ident $s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:148:5
+  --> $DIR/mixed-site-span.rs:149:5
    |
 LL |     test!();
    |     ^^^^^^^ no `ItemUse` in the root
@@ -431,7 +431,7 @@ LL +     ($m:ident $s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:144:9
+  --> $DIR/mixed-site-span.rs:145:9
    |
 LL |         with_crate!{$crate mixed ItemUse}
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -447,7 +447,7 @@ LL +         ItemUse as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:148:5
+  --> $DIR/mixed-site-span.rs:149:5
    |
 LL |     test!();
    |     ^^^^^^^ no `ItemUse` in the root
@@ -461,7 +461,7 @@ LL +     ($m:ident $s:ident $i:ident) => { ItemUse as _ };
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:153:1
+  --> $DIR/mixed-site-span.rs:154:1
    |
 LL | use_input_crate!{proc_macro_item}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -469,7 +469,7 @@ LL | use_input_crate!{proc_macro_item}
    = note: this error originates in the macro `use_input_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:154:1
+  --> $DIR/mixed-site-span.rs:155:1
    |
 LL | use_input_krate!{proc_macro_item}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -477,7 +477,7 @@ LL | use_input_krate!{proc_macro_item}
    = note: this error originates in the macro `use_input_krate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:157:1
+  --> $DIR/mixed-site-span.rs:158:1
    |
 LL | use_call_crate!{proc_macro_item}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -485,7 +485,7 @@ LL | use_call_crate!{proc_macro_item}
    = note: this error originates in the macro `use_call_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:158:1
+  --> $DIR/mixed-site-span.rs:159:1
    |
 LL | use_call_krate!{proc_macro_item}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `proc_macro_item` in the root
@@ -493,7 +493,7 @@ LL | use_call_krate!{proc_macro_item}
    = note: this error originates in the macro `use_call_krate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:163:1
+  --> $DIR/mixed-site-span.rs:164:1
    |
 LL | use_mixed_crate!{TokenItem}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -507,7 +507,7 @@ LL +     token_site_span::TokenItem as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:164:1
+  --> $DIR/mixed-site-span.rs:165:1
    |
 LL | use_mixed_krate!{TokenItem}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `TokenItem` in the root
@@ -521,7 +521,7 @@ LL + token_site_span::TokenItem as _
    |
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:169:1
+  --> $DIR/mixed-site-span.rs:170:1
    |
 LL | use_input_crate!{ItemUse}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -529,7 +529,7 @@ LL | use_input_crate!{ItemUse}
    = note: this error originates in the macro `use_input_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:170:1
+  --> $DIR/mixed-site-span.rs:171:1
    |
 LL | use_input_krate!{ItemUse}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -537,7 +537,7 @@ LL | use_input_krate!{ItemUse}
    = note: this error originates in the macro `use_input_krate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:171:1
+  --> $DIR/mixed-site-span.rs:172:1
    |
 LL | use_mixed_crate!{ItemUse}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -545,7 +545,7 @@ LL | use_mixed_crate!{ItemUse}
    = note: this error originates in the macro `use_mixed_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:172:1
+  --> $DIR/mixed-site-span.rs:173:1
    |
 LL | use_mixed_krate!{ItemUse}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -553,7 +553,7 @@ LL | use_mixed_krate!{ItemUse}
    = note: this error originates in the macro `use_mixed_krate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:173:1
+  --> $DIR/mixed-site-span.rs:174:1
    |
 LL | use_call_crate!{ItemUse}
    | ^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -561,7 +561,7 @@ LL | use_call_crate!{ItemUse}
    = note: this error originates in the macro `use_call_crate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0432]: unresolved import `$crate`
-  --> $DIR/mixed-site-span.rs:174:1
+  --> $DIR/mixed-site-span.rs:175:1
    |
 LL | use_call_krate!{ItemUse}
    | ^^^^^^^^^^^^^^^^^^^^^^^^ no `ItemUse` in the root
@@ -569,7 +569,7 @@ LL | use_call_krate!{ItemUse}
    = note: this error originates in the macro `use_call_krate` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0426]: use of undeclared label `'label_use`
-  --> $DIR/mixed-site-span.rs:21:9
+  --> $DIR/mixed-site-span.rs:22:9
    |
 LL |         proc_macro_rules!();
    |         ^^^^^^^^^^^^^^^^^^^ undeclared label `'label_use`
@@ -577,7 +577,7 @@ LL |         proc_macro_rules!();
    = note: this error originates in the macro `proc_macro_rules` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0412]: cannot find type `ItemUse` in crate `$crate`
-  --> $DIR/mixed-site-span.rs:21:9
+  --> $DIR/mixed-site-span.rs:22:9
    |
 LL |         proc_macro_rules!();
    |         ^^^^^^^^^^^^^^^^^^^ not found in `$crate`
@@ -589,7 +589,7 @@ LL + use ItemUse;
    |
 
 error[E0425]: cannot find value `local_use` in this scope
-  --> $DIR/mixed-site-span.rs:21:9
+  --> $DIR/mixed-site-span.rs:22:9
    |
 LL |         proc_macro_rules!();
    |         ^^^^^^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `local_def`
@@ -597,7 +597,7 @@ LL |         proc_macro_rules!();
    = note: this error originates in the macro `proc_macro_rules` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0425]: cannot find value `local_def` in this scope
-  --> $DIR/mixed-site-span.rs:26:9
+  --> $DIR/mixed-site-span.rs:27:9
    |
 LL |         local_def;
    |         ^^^^^^^^^ help: a local variable with a similar name exists: `local_use`
diff --git a/tests/ui/proc-macro/modify-ast.rs b/tests/ui/proc-macro/modify-ast.rs
index 9e890f3ebaa..75aea597ed5 100644
--- a/tests/ui/proc-macro/modify-ast.rs
+++ b/tests/ui/proc-macro/modify-ast.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: modify-ast.rs
+//@ ignore-backends: gcc
 
 extern crate modify_ast;
 
diff --git a/tests/ui/proc-macro/parent-source-spans.rs b/tests/ui/proc-macro/parent-source-spans.rs
index cc3ac795f7f..f675f6fb6f7 100644
--- a/tests/ui/proc-macro/parent-source-spans.rs
+++ b/tests/ui/proc-macro/parent-source-spans.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: parent-source-spans.rs
+//@ ignore-backends: gcc
 
 #![feature(decl_macro)]
 
diff --git a/tests/ui/proc-macro/parent-source-spans.stderr b/tests/ui/proc-macro/parent-source-spans.stderr
index db1eed5e458..28a70eea873 100644
--- a/tests/ui/proc-macro/parent-source-spans.stderr
+++ b/tests/ui/proc-macro/parent-source-spans.stderr
@@ -1,5 +1,5 @@
 error: first final: "hello"
-  --> $DIR/parent-source-spans.rs:16:12
+  --> $DIR/parent-source-spans.rs:17:12
    |
 LL |     three!($a, $b);
    |            ^^
@@ -10,7 +10,7 @@ LL |     one!("hello", "world");
    = note: this error originates in the macro `two` which comes from the expansion of the macro `one` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: second final: "world"
-  --> $DIR/parent-source-spans.rs:16:16
+  --> $DIR/parent-source-spans.rs:17:16
    |
 LL |     three!($a, $b);
    |                ^^
@@ -21,7 +21,7 @@ LL |     one!("hello", "world");
    = note: this error originates in the macro `two` which comes from the expansion of the macro `one` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: first parent: "hello"
-  --> $DIR/parent-source-spans.rs:10:5
+  --> $DIR/parent-source-spans.rs:11:5
    |
 LL |     two!($a, $b);
    |     ^^^^^^^^^^^^
@@ -32,7 +32,7 @@ LL |     one!("hello", "world");
    = note: this error originates in the macro `one` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: second parent: "world"
-  --> $DIR/parent-source-spans.rs:10:5
+  --> $DIR/parent-source-spans.rs:11:5
    |
 LL |     two!($a, $b);
    |     ^^^^^^^^^^^^
@@ -43,31 +43,31 @@ LL |     one!("hello", "world");
    = note: this error originates in the macro `one` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: first grandparent: "hello"
-  --> $DIR/parent-source-spans.rs:36:5
+  --> $DIR/parent-source-spans.rs:37:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 error: second grandparent: "world"
-  --> $DIR/parent-source-spans.rs:36:5
+  --> $DIR/parent-source-spans.rs:37:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 error: first source: "hello"
-  --> $DIR/parent-source-spans.rs:36:5
+  --> $DIR/parent-source-spans.rs:37:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 error: second source: "world"
-  --> $DIR/parent-source-spans.rs:36:5
+  --> $DIR/parent-source-spans.rs:37:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 error: first final: "yay"
-  --> $DIR/parent-source-spans.rs:16:12
+  --> $DIR/parent-source-spans.rs:17:12
    |
 LL |     three!($a, $b);
    |            ^^
@@ -78,7 +78,7 @@ LL |     two!("yay", "rust");
    = note: this error originates in the macro `two` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: second final: "rust"
-  --> $DIR/parent-source-spans.rs:16:16
+  --> $DIR/parent-source-spans.rs:17:16
    |
 LL |     three!($a, $b);
    |                ^^
@@ -89,55 +89,55 @@ LL |     two!("yay", "rust");
    = note: this error originates in the macro `two` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: first parent: "yay"
-  --> $DIR/parent-source-spans.rs:42:5
+  --> $DIR/parent-source-spans.rs:43:5
    |
 LL |     two!("yay", "rust");
    |     ^^^^^^^^^^^^^^^^^^^
 
 error: second parent: "rust"
-  --> $DIR/parent-source-spans.rs:42:5
+  --> $DIR/parent-source-spans.rs:43:5
    |
 LL |     two!("yay", "rust");
    |     ^^^^^^^^^^^^^^^^^^^
 
 error: first source: "yay"
-  --> $DIR/parent-source-spans.rs:42:5
+  --> $DIR/parent-source-spans.rs:43:5
    |
 LL |     two!("yay", "rust");
    |     ^^^^^^^^^^^^^^^^^^^
 
 error: second source: "rust"
-  --> $DIR/parent-source-spans.rs:42:5
+  --> $DIR/parent-source-spans.rs:43:5
    |
 LL |     two!("yay", "rust");
    |     ^^^^^^^^^^^^^^^^^^^
 
 error: first final: "hip"
-  --> $DIR/parent-source-spans.rs:48:12
+  --> $DIR/parent-source-spans.rs:49:12
    |
 LL |     three!("hip", "hop");
    |            ^^^^^
 
 error: second final: "hop"
-  --> $DIR/parent-source-spans.rs:48:19
+  --> $DIR/parent-source-spans.rs:49:19
    |
 LL |     three!("hip", "hop");
    |                   ^^^^^
 
 error: first source: "hip"
-  --> $DIR/parent-source-spans.rs:48:12
+  --> $DIR/parent-source-spans.rs:49:12
    |
 LL |     three!("hip", "hop");
    |            ^^^^^
 
 error: second source: "hop"
-  --> $DIR/parent-source-spans.rs:48:19
+  --> $DIR/parent-source-spans.rs:49:19
    |
 LL |     three!("hip", "hop");
    |                   ^^^^^
 
 error[E0425]: cannot find value `ok` in this scope
-  --> $DIR/parent-source-spans.rs:29:5
+  --> $DIR/parent-source-spans.rs:30:5
    |
 LL |     parent_source_spans!($($tokens)*);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: a tuple variant with a similar name exists: `Ok`
@@ -152,7 +152,7 @@ LL |     one!("hello", "world");
    = note: this error originates in the macro `parent_source_spans` which comes from the expansion of the macro `one` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0425]: cannot find value `ok` in this scope
-  --> $DIR/parent-source-spans.rs:29:5
+  --> $DIR/parent-source-spans.rs:30:5
    |
 LL |     parent_source_spans!($($tokens)*);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: a tuple variant with a similar name exists: `Ok`
@@ -167,7 +167,7 @@ LL |     two!("yay", "rust");
    = note: this error originates in the macro `parent_source_spans` which comes from the expansion of the macro `two` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0425]: cannot find value `ok` in this scope
-  --> $DIR/parent-source-spans.rs:29:5
+  --> $DIR/parent-source-spans.rs:30:5
    |
 LL |     parent_source_spans!($($tokens)*);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: a tuple variant with a similar name exists: `Ok`
diff --git a/tests/ui/proc-macro/quote/basic.rs b/tests/ui/proc-macro/quote/basic.rs
index 0336dbb7856..4c6fb2408fb 100644
--- a/tests/ui/proc-macro/quote/basic.rs
+++ b/tests/ui/proc-macro/quote/basic.rs
@@ -1,5 +1,6 @@
 //@ run-pass
 //@ proc-macro: basic.rs
+//@ ignore-backends: gcc
 
 extern crate basic;
 
diff --git a/tests/ui/proc-macro/quote/not-repeatable.rs b/tests/ui/proc-macro/quote/not-repeatable.rs
index 0291e4ddf88..373f0e74dbd 100644
--- a/tests/ui/proc-macro/quote/not-repeatable.rs
+++ b/tests/ui/proc-macro/quote/not-repeatable.rs
@@ -8,5 +8,7 @@ struct Ipv4Addr;
 
 fn main() {
     let ip = Ipv4Addr;
-    let _ = quote! { $($ip)* }; //~ ERROR the method `quote_into_iter` exists for struct `Ipv4Addr`, but its trait bounds were not satisfied
+    let _ = quote! { $($ip)* };
+    //~^ ERROR the method `quote_into_iter` exists for struct `Ipv4Addr`, but its trait bounds were not satisfied
+    //~| ERROR type annotations needed
 }
diff --git a/tests/ui/proc-macro/quote/not-repeatable.stderr b/tests/ui/proc-macro/quote/not-repeatable.stderr
index aeda08d7de6..ff31799abb0 100644
--- a/tests/ui/proc-macro/quote/not-repeatable.stderr
+++ b/tests/ui/proc-macro/quote/not-repeatable.stderr
@@ -20,6 +20,13 @@ note: the traits `Iterator` and `ToTokens` must be implemented
   --> $SRC_DIR/proc_macro/src/to_tokens.rs:LL:COL
   --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
 
-error: aborting due to 1 previous error
+error[E0282]: type annotations needed
+  --> $DIR/not-repeatable.rs:11:13
+   |
+LL |     let _ = quote! { $($ip)* };
+   |             ^^^^^^^^^^^^^^^^^^ cannot infer type
+
+error: aborting due to 2 previous errors
 
-For more information about this error, try `rustc --explain E0599`.
+Some errors have detailed explanations: E0282, E0599.
+For more information about an error, try `rustc --explain E0282`.
diff --git a/tests/ui/proc-macro/span-api-tests.rs b/tests/ui/proc-macro/span-api-tests.rs
index 792859ed05b..12832ba1163 100644
--- a/tests/ui/proc-macro/span-api-tests.rs
+++ b/tests/ui/proc-macro/span-api-tests.rs
@@ -2,6 +2,7 @@
 //@ proc-macro: span-api-tests.rs
 //@ aux-build:span-test-macros.rs
 //@ compile-flags: -Ztranslate-remapped-path-to-local-path=yes
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate span_test_macros;
diff --git a/tests/ui/proc-macro/span-from-proc-macro.rs b/tests/ui/proc-macro/span-from-proc-macro.rs
index 4e12a695a5c..24a28d53476 100644
--- a/tests/ui/proc-macro/span-from-proc-macro.rs
+++ b/tests/ui/proc-macro/span-from-proc-macro.rs
@@ -1,6 +1,7 @@
 //@ proc-macro: custom-quote.rs
 //@ proc-macro: span-from-proc-macro.rs
 //@ compile-flags: -Z macro-backtrace
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate span_from_proc_macro;
diff --git a/tests/ui/proc-macro/span-from-proc-macro.stderr b/tests/ui/proc-macro/span-from-proc-macro.stderr
index c79ab04eadf..945a5620fac 100644
--- a/tests/ui/proc-macro/span-from-proc-macro.stderr
+++ b/tests/ui/proc-macro/span-from-proc-macro.stderr
@@ -7,7 +7,7 @@ LL | pub fn error_from_attribute(_args: TokenStream, _input: TokenStream) -> Tok
 LL |             field: MissingType
    |                    ^^^^^^^^^^^ not found in this scope
    |
-  ::: $DIR/span-from-proc-macro.rs:8:1
+  ::: $DIR/span-from-proc-macro.rs:9:1
    |
 LL | #[error_from_attribute]
    | ----------------------- in this attribute macro expansion
@@ -21,7 +21,7 @@ LL | pub fn error_from_derive(_input: TokenStream) -> TokenStream {
 LL |             Variant(OtherMissingType)
    |                     ^^^^^^^^^^^^^^^^ not found in this scope
    |
-  ::: $DIR/span-from-proc-macro.rs:11:10
+  ::: $DIR/span-from-proc-macro.rs:12:10
    |
 LL | #[derive(ErrorFromDerive)]
    |          --------------- in this derive macro expansion
@@ -35,7 +35,7 @@ LL |     custom_quote::custom_quote! {
 LL |         my_ident
    |         ^^^^^^^^ not found in this scope
    |
-  ::: $DIR/span-from-proc-macro.rs:16:5
+  ::: $DIR/span-from-proc-macro.rs:17:5
    |
 LL |     other_error_from_bang!();
    |     ------------------------ in this macro invocation
@@ -51,7 +51,7 @@ LL |             let bang_error: bool = 25;
 LL | pub fn error_from_bang(_input: TokenStream) -> TokenStream {
    | ---------------------------------------------------------- in this expansion of `error_from_bang!`
    |
-  ::: $DIR/span-from-proc-macro.rs:15:5
+  ::: $DIR/span-from-proc-macro.rs:16:5
    |
 LL |     error_from_bang!();
    |     ------------------ in this macro invocation
diff --git a/tests/ui/proc-macro/weird-hygiene.rs b/tests/ui/proc-macro/weird-hygiene.rs
index de55484109a..8d8427d0e41 100644
--- a/tests/ui/proc-macro/weird-hygiene.rs
+++ b/tests/ui/proc-macro/weird-hygiene.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: weird-hygiene.rs
+//@ ignore-backends: gcc
 
 #![feature(stmt_expr_attributes)]
 #![feature(proc_macro_hygiene)]
diff --git a/tests/ui/proc-macro/weird-hygiene.stderr b/tests/ui/proc-macro/weird-hygiene.stderr
index 256e68e8970..0cfac3f89a0 100644
--- a/tests/ui/proc-macro/weird-hygiene.stderr
+++ b/tests/ui/proc-macro/weird-hygiene.stderr
@@ -1,5 +1,5 @@
 error[E0425]: cannot find value `hidden_ident` in this scope
-  --> $DIR/weird-hygiene.rs:23:43
+  --> $DIR/weird-hygiene.rs:24:43
    |
 LL |             Value = (stringify!($tokens + hidden_ident), 1).1
    |                                           ^^^^^^^^^^^^ not found in this scope
@@ -10,7 +10,7 @@ LL |     other!(50);
    = note: this error originates in the macro `inner` which comes from the expansion of the macro `other` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0425]: cannot find value `hidden_ident` in this scope
-  --> $DIR/weird-hygiene.rs:34:13
+  --> $DIR/weird-hygiene.rs:35:13
    |
 LL |             hidden_ident
    |             ^^^^^^^^^^^^ not found in this scope
diff --git a/tests/ui/process/multi-panic.rs b/tests/ui/process/multi-panic.rs
index 1fddffeb770..67bbd16fba7 100644
--- a/tests/ui/process/multi-panic.rs
+++ b/tests/ui/process/multi-panic.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-subprocess
 //@ needs-unwind
+//@ ignore-backends: gcc
 
 fn check_for_no_backtrace(test: std::process::Output) {
     assert!(!test.status.success());
diff --git a/tests/ui/repeat-expr/copy-inference-side-effects-are-lazy.stderr b/tests/ui/repeat-expr/copy-inference-side-effects-are-lazy.stderr
index ba44beb76db..b8a8f927542 100644
--- a/tests/ui/repeat-expr/copy-inference-side-effects-are-lazy.stderr
+++ b/tests/ui/repeat-expr/copy-inference-side-effects-are-lazy.stderr
@@ -5,9 +5,9 @@ LL |     let x = [Foo(PhantomData); 2];
    |         ^
 LL |
 LL |     extract(x).max(2);
-   |     ---------- type must be known at this point
+   |                --- type must be known at this point
    |
-help: consider giving `x` an explicit type, where the type for type parameter `T` is specified
+help: consider giving `x` an explicit type, where the placeholders `_` are specified
    |
 LL |     let x: [Foo<T>; 2] = [Foo(PhantomData); 2];
    |          +++++++++++++
diff --git a/tests/ui/resolve/prelude-order.rs b/tests/ui/resolve/prelude-order.rs
index a3f194270d4..c6683bdff22 100644
--- a/tests/ui/resolve/prelude-order.rs
+++ b/tests/ui/resolve/prelude-order.rs
@@ -1,5 +1,6 @@
 //@ proc-macro:macro_helpers.rs
 //@ compile-flags: --crate-type=lib
+//@ ignore-backends: gcc
 
 /* There are 5 preludes and 3 namespaces. Test the order in which they are resolved.
  * See https://doc.rust-lang.org/nightly/reference/names/preludes.html.
diff --git a/tests/ui/resolve/prelude-order.stderr b/tests/ui/resolve/prelude-order.stderr
index 1b9cc94285a..4dad39fb6d2 100644
--- a/tests/ui/resolve/prelude-order.stderr
+++ b/tests/ui/resolve/prelude-order.stderr
@@ -1,17 +1,17 @@
 error[E0433]: failed to resolve: could not find `inner` in `type_ns`
-  --> $DIR/prelude-order.rs:61:12
+  --> $DIR/prelude-order.rs:62:12
    |
 LL | #[type_ns::inner]
    |            ^^^^^ could not find `inner` in `type_ns`
 
 error[E0433]: failed to resolve: could not find `inner` in `usize`
-  --> $DIR/prelude-order.rs:73:10
+  --> $DIR/prelude-order.rs:74:10
    |
 LL | #[usize::inner]
    |          ^^^^^ could not find `inner` in `usize`
 
 error[E0573]: expected type, found crate `Option`
-  --> $DIR/prelude-order.rs:79:12
+  --> $DIR/prelude-order.rs:80:12
    |
 LL | fn e2() -> Option<i32> { None }
    |            ^^^^^^^^^^^ not a type
@@ -22,7 +22,7 @@ LL + use std::option::Option;
    |
 
 error[E0308]: mismatched types
-  --> $DIR/prelude-order.rs:82:1
+  --> $DIR/prelude-order.rs:83:1
    |
 LL | #[test]
    | ^^^^^^^- help: try adding a return type: `-> &'static str`
@@ -32,7 +32,7 @@ LL | #[test]
    = note: this error originates in the attribute macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0308]: mismatched types
-  --> $DIR/prelude-order.rs:86:1
+  --> $DIR/prelude-order.rs:87:1
    |
 LL | #[global_allocator]
    | ^^^^^^^^^^^^^^^^^^^- help: try adding a return type: `-> &'static str`
diff --git a/tests/ui/resolve/unused-macro-import.rs b/tests/ui/resolve/unused-macro-import.rs
new file mode 100644
index 00000000000..e85f7a43993
--- /dev/null
+++ b/tests/ui/resolve/unused-macro-import.rs
@@ -0,0 +1,13 @@
+//@ check-pass
+
+#![warn(unused_imports)]
+
+#[macro_export]
+macro_rules! mac { () => {} }
+
+fn main() {
+    // Unused, `mac` as `macro_rules!` is already in scope and has higher priority.
+    use crate::mac; //~ WARN unused import: `crate::mac`
+
+    mac!();
+}
diff --git a/tests/ui/resolve/unused-macro-import.stderr b/tests/ui/resolve/unused-macro-import.stderr
new file mode 100644
index 00000000000..5f9813808a0
--- /dev/null
+++ b/tests/ui/resolve/unused-macro-import.stderr
@@ -0,0 +1,14 @@
+warning: unused import: `crate::mac`
+  --> $DIR/unused-macro-import.rs:10:9
+   |
+LL |     use crate::mac;
+   |         ^^^^^^^^^^
+   |
+note: the lint level is defined here
+  --> $DIR/unused-macro-import.rs:3:9
+   |
+LL | #![warn(unused_imports)]
+   |         ^^^^^^^^^^^^^^
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/rfcs/rfc-3348-c-string-literals/edition-spans.rs b/tests/ui/rfcs/rfc-3348-c-string-literals/edition-spans.rs
index 414d5518e1f..2387dfb2bc5 100644
--- a/tests/ui/rfcs/rfc-3348-c-string-literals/edition-spans.rs
+++ b/tests/ui/rfcs/rfc-3348-c-string-literals/edition-spans.rs
@@ -7,6 +7,7 @@
 //@ check-pass
 
 //@ proc-macro: count.rs
+//@ ignore-backends: gcc
 extern crate count;
 
 const _: () = {
diff --git a/tests/ui/runtime/backtrace-debuginfo.rs b/tests/ui/runtime/backtrace-debuginfo.rs
index 5e91f22aec0..d3b4d057e6d 100644
--- a/tests/ui/runtime/backtrace-debuginfo.rs
+++ b/tests/ui/runtime/backtrace-debuginfo.rs
@@ -19,6 +19,7 @@
 // FIXME(#117097): backtrace (possibly unwinding mechanism) seems to be different on at least
 // `i686-mingw` (32-bit windows-gnu)? cc #128911.
 //@ ignore-windows-gnu
+//@ ignore-backends: gcc
 
 use std::env;
 
diff --git a/tests/ui/runtime/out-of-stack.rs b/tests/ui/runtime/out-of-stack.rs
index 913d3637c8f..3e092728f29 100644
--- a/tests/ui/runtime/out-of-stack.rs
+++ b/tests/ui/runtime/out-of-stack.rs
@@ -10,6 +10,7 @@
 //@ ignore-tvos stack overflow handlers aren't enabled
 //@ ignore-watchos stack overflow handlers aren't enabled
 //@ ignore-visionos stack overflow handlers aren't enabled
+//@ ignore-backends: gcc
 
 #![feature(rustc_private)]
 
diff --git a/tests/ui/rust-2018/suggestions-not-always-applicable.fixed b/tests/ui/rust-2018/suggestions-not-always-applicable.fixed
index e3070ba150b..3a42434494d 100644
--- a/tests/ui/rust-2018/suggestions-not-always-applicable.fixed
+++ b/tests/ui/rust-2018/suggestions-not-always-applicable.fixed
@@ -3,6 +3,7 @@
 //@ run-rustfix
 //@ rustfix-only-machine-applicable
 //@ check-pass
+//@ ignore-backends: gcc
 
 #![warn(rust_2018_compatibility)]
 
diff --git a/tests/ui/rust-2018/suggestions-not-always-applicable.rs b/tests/ui/rust-2018/suggestions-not-always-applicable.rs
index e3070ba150b..3a42434494d 100644
--- a/tests/ui/rust-2018/suggestions-not-always-applicable.rs
+++ b/tests/ui/rust-2018/suggestions-not-always-applicable.rs
@@ -3,6 +3,7 @@
 //@ run-rustfix
 //@ rustfix-only-machine-applicable
 //@ check-pass
+//@ ignore-backends: gcc
 
 #![warn(rust_2018_compatibility)]
 
diff --git a/tests/ui/rust-2021/reserved-prefixes-via-macro.rs b/tests/ui/rust-2021/reserved-prefixes-via-macro.rs
index eec1b859c20..456649f23ca 100644
--- a/tests/ui/rust-2021/reserved-prefixes-via-macro.rs
+++ b/tests/ui/rust-2021/reserved-prefixes-via-macro.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ edition:2021
 //@ proc-macro: reserved-prefixes-macro-2018.rs
+//@ ignore-backends: gcc
 
 extern crate reserved_prefixes_macro_2018 as m2018;
 
diff --git a/tests/ui/rust-2024/reserved-guarded-strings-via-macro.rs b/tests/ui/rust-2024/reserved-guarded-strings-via-macro.rs
index ead2ab40b77..ddb32c26717 100644
--- a/tests/ui/rust-2024/reserved-guarded-strings-via-macro.rs
+++ b/tests/ui/rust-2024/reserved-guarded-strings-via-macro.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ edition:2024
 //@ proc-macro: reserved-guarded-strings-macro-2021.rs
+//@ ignore-backends: gcc
 
 extern crate reserved_guarded_strings_macro_2021 as m2021;
 
diff --git a/tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-from-pm.rs b/tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-from-pm.rs
index e2c504e708c..8b7073649b7 100644
--- a/tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-from-pm.rs
+++ b/tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-from-pm.rs
@@ -6,6 +6,7 @@
 //@[edition2021] edition:2021
 //@[edition2024] edition:2024
 //@ proc-macro: unsafe-attributes-pm.rs
+//@ ignore-backends: gcc
 
 unsafe_attributes_pm::missing_unsafe!();
 
diff --git a/tests/ui/sanitizer/cfi/transparent-has-regions.rs b/tests/ui/sanitizer/cfi/transparent-has-regions.rs
index b82850133c1..3e9893df23c 100644
--- a/tests/ui/sanitizer/cfi/transparent-has-regions.rs
+++ b/tests/ui/sanitizer/cfi/transparent-has-regions.rs
@@ -3,6 +3,7 @@
 //@ no-prefer-dynamic
 //@ only-x86_64-unknown-linux-gnu
 //@ build-pass
+//@ ignore-backends: gcc
 
 pub trait Trait {}
 
diff --git a/tests/ui/sanitizer/issue-111184-cfi-coroutine-witness.rs b/tests/ui/sanitizer/issue-111184-cfi-coroutine-witness.rs
index be81c7bd0ca..ac2b95b6398 100644
--- a/tests/ui/sanitizer/issue-111184-cfi-coroutine-witness.rs
+++ b/tests/ui/sanitizer/issue-111184-cfi-coroutine-witness.rs
@@ -7,6 +7,7 @@
 //@ no-prefer-dynamic
 //@ only-x86_64-unknown-linux-gnu
 //@ build-pass
+//@ ignore-backends: gcc
 
 use std::future::Future;
 
diff --git a/tests/ui/sepcomp/sepcomp-lib-lto.rs b/tests/ui/sepcomp/sepcomp-lib-lto.rs
index 2166a8fd031..f47ea25a4fc 100644
--- a/tests/ui/sepcomp/sepcomp-lib-lto.rs
+++ b/tests/ui/sepcomp/sepcomp-lib-lto.rs
@@ -5,6 +5,7 @@
 //@ aux-build:sepcomp_lib.rs
 //@ compile-flags: -C lto -g
 //@ no-prefer-dynamic
+//@ ignore-backends: gcc
 
 extern crate sepcomp_lib;
 use sepcomp_lib::a::one;
diff --git a/tests/ui/sepcomp/sepcomp-unwind.rs b/tests/ui/sepcomp/sepcomp-unwind.rs
index 95591676b5e..0038e887c4e 100644
--- a/tests/ui/sepcomp/sepcomp-unwind.rs
+++ b/tests/ui/sepcomp/sepcomp-unwind.rs
@@ -3,6 +3,7 @@
 #![allow(dead_code)]
 //@ compile-flags: -C codegen-units=3
 //@ needs-threads
+//@ ignore-backends: gcc
 
 // Test unwinding through multiple compilation units.
 
diff --git a/tests/ui/simd/intrinsic/generic-arithmetic-2.rs b/tests/ui/simd/intrinsic/generic-arithmetic-2.rs
index caec607d6fe..d67ff6b33b7 100644
--- a/tests/ui/simd/intrinsic/generic-arithmetic-2.rs
+++ b/tests/ui/simd/intrinsic/generic-arithmetic-2.rs
@@ -1,4 +1,5 @@
 //@ build-fail
+//@ ignore-backends: gcc
 
 #![feature(repr_simd, core_intrinsics)]
 #![allow(non_camel_case_types)]
diff --git a/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr b/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr
index a27a8d721fb..a2646c8e848 100644
--- a/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr
+++ b/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr
@@ -1,167 +1,167 @@
 error[E0511]: invalid monomorphization of `simd_add` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:68:9
+  --> $DIR/generic-arithmetic-2.rs:69:9
    |
 LL |         simd_add(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_sub` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:70:9
+  --> $DIR/generic-arithmetic-2.rs:71:9
    |
 LL |         simd_sub(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_mul` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:72:9
+  --> $DIR/generic-arithmetic-2.rs:73:9
    |
 LL |         simd_mul(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_div` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:74:9
+  --> $DIR/generic-arithmetic-2.rs:75:9
    |
 LL |         simd_div(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shl` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:76:9
+  --> $DIR/generic-arithmetic-2.rs:77:9
    |
 LL |         simd_shl(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shr` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:78:9
+  --> $DIR/generic-arithmetic-2.rs:79:9
    |
 LL |         simd_shr(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_funnel_shl` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:80:9
+  --> $DIR/generic-arithmetic-2.rs:81:9
    |
 LL |         simd_funnel_shl(0, 0, 0);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_funnel_shr` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:82:9
+  --> $DIR/generic-arithmetic-2.rs:83:9
    |
 LL |         simd_funnel_shr(0, 0, 0);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_and` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:84:9
+  --> $DIR/generic-arithmetic-2.rs:85:9
    |
 LL |         simd_and(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_or` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:86:9
+  --> $DIR/generic-arithmetic-2.rs:87:9
    |
 LL |         simd_or(0, 0);
    |         ^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_xor` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:88:9
+  --> $DIR/generic-arithmetic-2.rs:89:9
    |
 LL |         simd_xor(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_neg` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:91:9
+  --> $DIR/generic-arithmetic-2.rs:92:9
    |
 LL |         simd_neg(0);
    |         ^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_bswap` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:93:9
+  --> $DIR/generic-arithmetic-2.rs:94:9
    |
 LL |         simd_bswap(0);
    |         ^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_bitreverse` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:95:9
+  --> $DIR/generic-arithmetic-2.rs:96:9
    |
 LL |         simd_bitreverse(0);
    |         ^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_ctlz` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:97:9
+  --> $DIR/generic-arithmetic-2.rs:98:9
    |
 LL |         simd_ctlz(0);
    |         ^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_cttz` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:99:9
+  --> $DIR/generic-arithmetic-2.rs:100:9
    |
 LL |         simd_cttz(0);
    |         ^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shl` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:102:9
+  --> $DIR/generic-arithmetic-2.rs:103:9
    |
 LL |         simd_shl(z, z);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shr` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:104:9
+  --> $DIR/generic-arithmetic-2.rs:105:9
    |
 LL |         simd_shr(z, z);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_funnel_shl` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:106:9
+  --> $DIR/generic-arithmetic-2.rs:107:9
    |
 LL |         simd_funnel_shl(z, z, z);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_funnel_shr` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:108:9
+  --> $DIR/generic-arithmetic-2.rs:109:9
    |
 LL |         simd_funnel_shr(z, z, z);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_and` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:110:9
+  --> $DIR/generic-arithmetic-2.rs:111:9
    |
 LL |         simd_and(z, z);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_or` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:112:9
+  --> $DIR/generic-arithmetic-2.rs:113:9
    |
 LL |         simd_or(z, z);
    |         ^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_xor` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:114:9
+  --> $DIR/generic-arithmetic-2.rs:115:9
    |
 LL |         simd_xor(z, z);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_bswap` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:116:9
+  --> $DIR/generic-arithmetic-2.rs:117:9
    |
 LL |         simd_bswap(z);
    |         ^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_bitreverse` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:118:9
+  --> $DIR/generic-arithmetic-2.rs:119:9
    |
 LL |         simd_bitreverse(z);
    |         ^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_ctlz` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:120:9
+  --> $DIR/generic-arithmetic-2.rs:121:9
    |
 LL |         simd_ctlz(z);
    |         ^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_ctpop` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:122:9
+  --> $DIR/generic-arithmetic-2.rs:123:9
    |
 LL |         simd_ctpop(z);
    |         ^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_cttz` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:124:9
+  --> $DIR/generic-arithmetic-2.rs:125:9
    |
 LL |         simd_cttz(z);
    |         ^^^^^^^^^^^^
diff --git a/tests/ui/simd/intrinsic/generic-elements.rs b/tests/ui/simd/intrinsic/generic-elements.rs
index 905299a9289..08d1e3ce944 100644
--- a/tests/ui/simd/intrinsic/generic-elements.rs
+++ b/tests/ui/simd/intrinsic/generic-elements.rs
@@ -1,4 +1,5 @@
 //@ build-fail
+//@ ignore-backends: gcc
 
 #![feature(
     repr_simd,
diff --git a/tests/ui/simd/intrinsic/generic-elements.stderr b/tests/ui/simd/intrinsic/generic-elements.stderr
index 3779aa86cee..a32a923633b 100644
--- a/tests/ui/simd/intrinsic/generic-elements.stderr
+++ b/tests/ui/simd/intrinsic/generic-elements.stderr
@@ -1,125 +1,125 @@
 error[E0511]: invalid monomorphization of `simd_insert` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-elements.rs:51:9
+  --> $DIR/generic-elements.rs:52:9
    |
 LL |         simd_insert(0, 0, 0);
    |         ^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_insert` intrinsic: expected inserted type `i32` (element of input `i32x4`), found `f64`
-  --> $DIR/generic-elements.rs:53:9
+  --> $DIR/generic-elements.rs:54:9
    |
 LL |         simd_insert(x, 0, 1.0);
    |         ^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_extract` intrinsic: expected return type `i32` (element of input `i32x4`), found `f32`
-  --> $DIR/generic-elements.rs:55:9
+  --> $DIR/generic-elements.rs:56:9
    |
 LL |         simd_extract::<_, f32>(x, 0);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-elements.rs:59:9
+  --> $DIR/generic-elements.rs:60:9
    |
 LL |         simd_shuffle::<i32, _, i32>(0, 0, IDX2);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-elements.rs:62:9
+  --> $DIR/generic-elements.rs:63:9
    |
 LL |         simd_shuffle::<i32, _, i32>(0, 0, IDX4);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-elements.rs:65:9
+  --> $DIR/generic-elements.rs:66:9
    |
 LL |         simd_shuffle::<i32, _, i32>(0, 0, IDX8);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected return element type `i32` (element of input `i32x4`), found `f32x2` with element type `f32`
-  --> $DIR/generic-elements.rs:68:9
+  --> $DIR/generic-elements.rs:69:9
    |
 LL |         simd_shuffle::<_, _, f32x2>(x, x, IDX2);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected return element type `i32` (element of input `i32x4`), found `f32x4` with element type `f32`
-  --> $DIR/generic-elements.rs:70:9
+  --> $DIR/generic-elements.rs:71:9
    |
 LL |         simd_shuffle::<_, _, f32x4>(x, x, IDX4);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected return element type `i32` (element of input `i32x4`), found `f32x8` with element type `f32`
-  --> $DIR/generic-elements.rs:72:9
+  --> $DIR/generic-elements.rs:73:9
    |
 LL |         simd_shuffle::<_, _, f32x8>(x, x, IDX8);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected return type of length 2, found `i32x8` with length 8
-  --> $DIR/generic-elements.rs:75:9
+  --> $DIR/generic-elements.rs:76:9
    |
 LL |         simd_shuffle::<_, _, i32x8>(x, x, IDX2);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected return type of length 4, found `i32x8` with length 8
-  --> $DIR/generic-elements.rs:77:9
+  --> $DIR/generic-elements.rs:78:9
    |
 LL |         simd_shuffle::<_, _, i32x8>(x, x, IDX4);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: expected return type of length 8, found `i32x2` with length 2
-  --> $DIR/generic-elements.rs:79:9
+  --> $DIR/generic-elements.rs:80:9
    |
 LL |         simd_shuffle::<_, _, i32x2>(x, x, IDX8);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-elements.rs:83:9
+  --> $DIR/generic-elements.rs:84:9
    |
 LL |         simd_shuffle_const_generic::<i32, i32, I2>(0, 0);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-elements.rs:86:9
+  --> $DIR/generic-elements.rs:87:9
    |
 LL |         simd_shuffle_const_generic::<i32, i32, I4>(0, 0);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-elements.rs:89:9
+  --> $DIR/generic-elements.rs:90:9
    |
 LL |         simd_shuffle_const_generic::<i32, i32, I8>(0, 0);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected return element type `i32` (element of input `i32x4`), found `f32x2` with element type `f32`
-  --> $DIR/generic-elements.rs:92:9
+  --> $DIR/generic-elements.rs:93:9
    |
 LL |         simd_shuffle_const_generic::<_, f32x2, I2>(x, x);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected return element type `i32` (element of input `i32x4`), found `f32x4` with element type `f32`
-  --> $DIR/generic-elements.rs:94:9
+  --> $DIR/generic-elements.rs:95:9
    |
 LL |         simd_shuffle_const_generic::<_, f32x4, I4>(x, x);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected return element type `i32` (element of input `i32x4`), found `f32x8` with element type `f32`
-  --> $DIR/generic-elements.rs:96:9
+  --> $DIR/generic-elements.rs:97:9
    |
 LL |         simd_shuffle_const_generic::<_, f32x8, I8>(x, x);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected return type of length 2, found `i32x8` with length 8
-  --> $DIR/generic-elements.rs:99:9
+  --> $DIR/generic-elements.rs:100:9
    |
 LL |         simd_shuffle_const_generic::<_, i32x8, I2>(x, x);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected return type of length 4, found `i32x8` with length 8
-  --> $DIR/generic-elements.rs:101:9
+  --> $DIR/generic-elements.rs:102:9
    |
 LL |         simd_shuffle_const_generic::<_, i32x8, I4>(x, x);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shuffle_const_generic` intrinsic: expected return type of length 8, found `i32x2` with length 2
-  --> $DIR/generic-elements.rs:103:9
+  --> $DIR/generic-elements.rs:104:9
    |
 LL |         simd_shuffle_const_generic::<_, i32x2, I8>(x, x);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/simd/masked-load-store-build-fail.rs b/tests/ui/simd/masked-load-store-build-fail.rs
index 4b6cc17683c..c711b6dfd97 100644
--- a/tests/ui/simd/masked-load-store-build-fail.rs
+++ b/tests/ui/simd/masked-load-store-build-fail.rs
@@ -1,4 +1,5 @@
 //@ build-fail
+//@ ignore-backends: gcc
 #![feature(repr_simd, core_intrinsics)]
 
 use std::intrinsics::simd::{simd_masked_load, simd_masked_store};
diff --git a/tests/ui/simd/masked-load-store-build-fail.stderr b/tests/ui/simd/masked-load-store-build-fail.stderr
index 7f09841b597..b9158f46ea9 100644
--- a/tests/ui/simd/masked-load-store-build-fail.stderr
+++ b/tests/ui/simd/masked-load-store-build-fail.stderr
@@ -1,47 +1,47 @@
 error[E0511]: invalid monomorphization of `simd_masked_load` intrinsic: expected third argument with length 8 (same as input type `Simd<i8, 8>`), found `Simd<u8, 4>` with length 4
-  --> $DIR/masked-load-store-build-fail.rs:15:9
+  --> $DIR/masked-load-store-build-fail.rs:16:9
    |
 LL |         simd_masked_load(Simd::<i8, 8>([-1, 0, -1, -1, 0, 0, 0, 0]), arr.as_ptr(), default);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_masked_load` intrinsic: expected element type `u8` of second argument `*const i8` to be a pointer to the element type `u8` of the first argument `Simd<u8, 4>`, found `u8` != `*_ u8`
-  --> $DIR/masked-load-store-build-fail.rs:18:9
+  --> $DIR/masked-load-store-build-fail.rs:19:9
    |
 LL |         simd_masked_load(Simd::<i8, 4>([-1, 0, -1, -1]), arr.as_ptr() as *const i8, default);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_masked_load` intrinsic: expected element type `u32` of second argument `*const u8` to be a pointer to the element type `u32` of the first argument `Simd<u32, 4>`, found `u32` != `*_ u32`
-  --> $DIR/masked-load-store-build-fail.rs:21:9
+  --> $DIR/masked-load-store-build-fail.rs:22:9
    |
 LL |         simd_masked_load(Simd::<i8, 4>([-1, 0, -1, -1]), arr.as_ptr(), Simd::<u32, 4>([9; 4]));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_masked_load` intrinsic: expected mask element type to be an integer, found `f32`
-  --> $DIR/masked-load-store-build-fail.rs:24:9
+  --> $DIR/masked-load-store-build-fail.rs:25:9
    |
 LL |         simd_masked_load(Simd::<f32, 4>([1.0, 0.0, 1.0, 1.0]), arr.as_ptr(), default);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_masked_store` intrinsic: expected element type `u32` of second argument `*const u8` to be a pointer to the element type `u32` of the first argument `Simd<u32, 4>`, found `u32` != `*mut u32`
-  --> $DIR/masked-load-store-build-fail.rs:27:9
+  --> $DIR/masked-load-store-build-fail.rs:28:9
    |
 LL |         simd_masked_store(Simd([-1i8; 4]), arr.as_ptr(), Simd([5u32; 4]));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_masked_store` intrinsic: expected element type `u8` of second argument `*const u8` to be a pointer to the element type `u8` of the first argument `Simd<u8, 4>`, found `u8` != `*mut u8`
-  --> $DIR/masked-load-store-build-fail.rs:30:9
+  --> $DIR/masked-load-store-build-fail.rs:31:9
    |
 LL |         simd_masked_store(Simd([-1i8; 4]), arr.as_ptr(), Simd([5u8; 4]));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_masked_store` intrinsic: expected third argument with length 4 (same as input type `Simd<i8, 4>`), found `Simd<u8, 2>` with length 2
-  --> $DIR/masked-load-store-build-fail.rs:33:9
+  --> $DIR/masked-load-store-build-fail.rs:34:9
    |
 LL |         simd_masked_store(Simd([-1i8; 4]), arr.as_mut_ptr(), Simd([5u8; 2]));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_masked_store` intrinsic: expected mask element type to be an integer, found `f32`
-  --> $DIR/masked-load-store-build-fail.rs:36:9
+  --> $DIR/masked-load-store-build-fail.rs:37:9
    |
 LL |         simd_masked_store(Simd([1f32; 4]), arr.as_mut_ptr(), Simd([5u8; 4]));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/simd/monomorphize-shuffle-index.generic.stderr b/tests/ui/simd/monomorphize-shuffle-index.generic.stderr
index b0742bc5ef8..c82adbf8d4c 100644
--- a/tests/ui/simd/monomorphize-shuffle-index.generic.stderr
+++ b/tests/ui/simd/monomorphize-shuffle-index.generic.stderr
@@ -1,5 +1,5 @@
 error: overly complex generic constant
-  --> $DIR/monomorphize-shuffle-index.rs:36:51
+  --> $DIR/monomorphize-shuffle-index.rs:37:51
    |
 LL |         return simd_shuffle_const_generic::<_, _, { &Self::I.0 }>(a, b);
    |                                                   ^^----------^^
diff --git a/tests/ui/simd/monomorphize-shuffle-index.rs b/tests/ui/simd/monomorphize-shuffle-index.rs
index 1490f8e2319..ba952cdb0dc 100644
--- a/tests/ui/simd/monomorphize-shuffle-index.rs
+++ b/tests/ui/simd/monomorphize-shuffle-index.rs
@@ -1,6 +1,7 @@
 //@ revisions: old generic generic_with_fn
 //@[old]run-pass
 //@[generic_with_fn]run-pass
+//@ ignore-backends: gcc
 #![feature(
     repr_simd,
     core_intrinsics,
diff --git a/tests/ui/simd/not-out-of-bounds.rs b/tests/ui/simd/not-out-of-bounds.rs
index 4bd2a69edbf..c80c90e3ab9 100644
--- a/tests/ui/simd/not-out-of-bounds.rs
+++ b/tests/ui/simd/not-out-of-bounds.rs
@@ -1,4 +1,5 @@
 //@ build-fail
+//@ ignore-backends: gcc
 #![allow(non_camel_case_types)]
 #![feature(repr_simd, core_intrinsics)]
 
diff --git a/tests/ui/simd/not-out-of-bounds.stderr b/tests/ui/simd/not-out-of-bounds.stderr
index 4b6bda93e45..734c21fbf41 100644
--- a/tests/ui/simd/not-out-of-bounds.stderr
+++ b/tests/ui/simd/not-out-of-bounds.stderr
@@ -1,5 +1,5 @@
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: SIMD index #0 is out of bounds (limit 4)
-  --> $DIR/not-out-of-bounds.rs:52:21
+  --> $DIR/not-out-of-bounds.rs:53:21
    |
 LL |                     $y(vec1, vec2, IDX)
    |                     ^^^^^^^^^^^^^^^^^^^
@@ -10,7 +10,7 @@ LL |     test_shuffle_lanes!(2, u8x2, simd_shuffle);
    = note: this error originates in the macro `test_shuffle_lanes` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: SIMD index #0 is out of bounds (limit 8)
-  --> $DIR/not-out-of-bounds.rs:52:21
+  --> $DIR/not-out-of-bounds.rs:53:21
    |
 LL |                     $y(vec1, vec2, IDX)
    |                     ^^^^^^^^^^^^^^^^^^^
@@ -21,7 +21,7 @@ LL |     test_shuffle_lanes!(4, u8x4, simd_shuffle);
    = note: this error originates in the macro `test_shuffle_lanes` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: SIMD index #0 is out of bounds (limit 16)
-  --> $DIR/not-out-of-bounds.rs:52:21
+  --> $DIR/not-out-of-bounds.rs:53:21
    |
 LL |                     $y(vec1, vec2, IDX)
    |                     ^^^^^^^^^^^^^^^^^^^
@@ -32,7 +32,7 @@ LL |     test_shuffle_lanes!(8, u8x8, simd_shuffle);
    = note: this error originates in the macro `test_shuffle_lanes` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: SIMD index #0 is out of bounds (limit 32)
-  --> $DIR/not-out-of-bounds.rs:52:21
+  --> $DIR/not-out-of-bounds.rs:53:21
    |
 LL |                     $y(vec1, vec2, IDX)
    |                     ^^^^^^^^^^^^^^^^^^^
@@ -43,7 +43,7 @@ LL |     test_shuffle_lanes!(16, u8x16, simd_shuffle);
    = note: this error originates in the macro `test_shuffle_lanes` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: SIMD index #0 is out of bounds (limit 64)
-  --> $DIR/not-out-of-bounds.rs:52:21
+  --> $DIR/not-out-of-bounds.rs:53:21
    |
 LL |                     $y(vec1, vec2, IDX)
    |                     ^^^^^^^^^^^^^^^^^^^
@@ -54,7 +54,7 @@ LL |     test_shuffle_lanes!(32, u8x32, simd_shuffle);
    = note: this error originates in the macro `test_shuffle_lanes` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: SIMD index #0 is out of bounds (limit 128)
-  --> $DIR/not-out-of-bounds.rs:52:21
+  --> $DIR/not-out-of-bounds.rs:53:21
    |
 LL |                     $y(vec1, vec2, IDX)
    |                     ^^^^^^^^^^^^^^^^^^^
@@ -65,19 +65,19 @@ LL |     test_shuffle_lanes!(64, u8x64, simd_shuffle);
    = note: this error originates in the macro `test_shuffle_lanes` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0511]: invalid monomorphization of `simd_shuffle` intrinsic: SIMD index #0 is out of bounds (limit 4)
-  --> $DIR/not-out-of-bounds.rs:77:23
+  --> $DIR/not-out-of-bounds.rs:78:23
    |
 LL |         let _: u8x2 = simd_shuffle(v, v, I);
    |                       ^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_insert` intrinsic: SIMD index #1 is out of bounds (limit 2)
-  --> $DIR/not-out-of-bounds.rs:83:9
+  --> $DIR/not-out-of-bounds.rs:84:9
    |
 LL |         simd_insert(v, 2, 0u8);
    |         ^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_extract` intrinsic: SIMD index #1 is out of bounds (limit 2)
-  --> $DIR/not-out-of-bounds.rs:84:24
+  --> $DIR/not-out-of-bounds.rs:85:24
    |
 LL |         let _val: u8 = simd_extract(v, 2);
    |                        ^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/span/issue-42234-unknown-receiver-type.stderr b/tests/ui/span/issue-42234-unknown-receiver-type.stderr
index 10308ec07da..71ac4f53b3f 100644
--- a/tests/ui/span/issue-42234-unknown-receiver-type.stderr
+++ b/tests/ui/span/issue-42234-unknown-receiver-type.stderr
@@ -4,7 +4,7 @@ error[E0282]: type annotations needed
 LL |     let x: Option<_> = None;
    |                        ^^^^ cannot infer type of the type parameter `T` declared on the enum `Option`
 LL |     x.unwrap().method_that_could_exist_on_some_type();
-   |     ---------- type must be known at this point
+   |                ------------------------------------ type must be known at this point
    |
 help: consider specifying the generic argument
    |
@@ -16,6 +16,8 @@ error[E0282]: type annotations needed
    |
 LL |         .sum::<_>()
    |          ^^^ cannot infer type of the type parameter `S` declared on the method `sum`
+LL |         .to_string()
+   |          --------- type must be known at this point
    |
 
 error: aborting due to 2 previous errors
diff --git a/tests/ui/structs-enums/unit-like-struct-drop-run.rs b/tests/ui/structs-enums/unit-like-struct-drop-run.rs
index 3d00871837c..5e3fc5931bd 100644
--- a/tests/ui/structs-enums/unit-like-struct-drop-run.rs
+++ b/tests/ui/structs-enums/unit-like-struct-drop-run.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 //@ needs-threads
+//@ ignore-backends: gcc
 
 // Make sure the destructor is run for unit-like structs.
 
diff --git a/tests/ui/suggestions/issue-61963.rs b/tests/ui/suggestions/issue-61963.rs
index 77e4b21f5db..bf0680b9860 100644
--- a/tests/ui/suggestions/issue-61963.rs
+++ b/tests/ui/suggestions/issue-61963.rs
@@ -1,6 +1,7 @@
 //@ edition: 2015
 //@ proc-macro: issue-61963.rs
 //@ proc-macro: issue-61963-1.rs
+//@ ignore-backends: gcc
 #![deny(bare_trait_objects)]
 
 #[macro_use]
diff --git a/tests/ui/suggestions/issue-61963.stderr b/tests/ui/suggestions/issue-61963.stderr
index ffdeef12bb7..f9146a619ec 100644
--- a/tests/ui/suggestions/issue-61963.stderr
+++ b/tests/ui/suggestions/issue-61963.stderr
@@ -1,5 +1,5 @@
 error: trait objects without an explicit `dyn` are deprecated
-  --> $DIR/issue-61963.rs:23:14
+  --> $DIR/issue-61963.rs:24:14
    |
 LL |     bar: Box<Bar>,
    |              ^^^
@@ -7,7 +7,7 @@ LL |     bar: Box<Bar>,
    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
 note: the lint level is defined here
-  --> $DIR/issue-61963.rs:4:9
+  --> $DIR/issue-61963.rs:5:9
    |
 LL | #![deny(bare_trait_objects)]
    |         ^^^^^^^^^^^^^^^^^^
@@ -17,7 +17,7 @@ LL |     bar: Box<dyn Bar>,
    |              +++
 
 error: trait objects without an explicit `dyn` are deprecated
-  --> $DIR/issue-61963.rs:19:1
+  --> $DIR/issue-61963.rs:20:1
    |
 LL | pub struct Foo {
    | ^^^
diff --git a/tests/ui/suggestions/issue-97760.stderr b/tests/ui/suggestions/issue-97760.stderr
index 1084ea7c9e0..c3cf7e13987 100644
--- a/tests/ui/suggestions/issue-97760.stderr
+++ b/tests/ui/suggestions/issue-97760.stderr
@@ -1,11 +1,8 @@
 error[E0277]: `<impl IntoIterator as IntoIterator>::Item` doesn't implement `std::fmt::Display`
-  --> $DIR/issue-97760.rs:4:20
+  --> $DIR/issue-97760.rs:4:19
    |
 LL |         println!("{x}");
-   |                   -^-
-   |                   ||
-   |                   |`<impl IntoIterator as IntoIterator>::Item` cannot be formatted with the default formatter
-   |                   required by this formatting parameter
+   |                   ^^^ `<impl IntoIterator as IntoIterator>::Item` cannot be formatted with the default formatter
    |
    = help: the trait `std::fmt::Display` is not implemented for `<impl IntoIterator as IntoIterator>::Item`
    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
diff --git a/tests/ui/suggestions/suggest-ref-macro.rs b/tests/ui/suggestions/suggest-ref-macro.rs
index 2f31af33782..41a2acf9062 100644
--- a/tests/ui/suggestions/suggest-ref-macro.rs
+++ b/tests/ui/suggestions/suggest-ref-macro.rs
@@ -1,5 +1,6 @@
 // run-check
 //@ proc-macro: proc-macro-type-error.rs
+//@ ignore-backends: gcc
 
 extern crate proc_macro_type_error;
 
diff --git a/tests/ui/suggestions/suggest-ref-macro.stderr b/tests/ui/suggestions/suggest-ref-macro.stderr
index 08bc9e86a50..2a52c1e2445 100644
--- a/tests/ui/suggestions/suggest-ref-macro.stderr
+++ b/tests/ui/suggestions/suggest-ref-macro.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/suggest-ref-macro.rs:8:1
+  --> $DIR/suggest-ref-macro.rs:9:1
    |
 LL | #[hello]
    | ^^^^^^^^
@@ -8,14 +8,14 @@ LL | #[hello]
    | arguments to this function are incorrect
    |
 note: function defined here
-  --> $DIR/suggest-ref-macro.rs:8:1
+  --> $DIR/suggest-ref-macro.rs:9:1
    |
 LL | #[hello]
    | ^^^^^^^^
    = note: this error originates in the attribute macro `hello` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0308]: mismatched types
-  --> $DIR/suggest-ref-macro.rs:15:11
+  --> $DIR/suggest-ref-macro.rs:16:11
    |
 LL |         x(123);
    |         - ^^^ expected `&mut i32`, found integer
@@ -26,7 +26,7 @@ LL |     bla!();
    |     ------ in this macro invocation
    |
 note: function defined here
-  --> $DIR/suggest-ref-macro.rs:11:4
+  --> $DIR/suggest-ref-macro.rs:12:4
    |
 LL | fn x(_: &mut i32) {}
    |    ^ -----------
@@ -37,7 +37,7 @@ LL |         x(&mut 123);
    |           ++++
 
 error[E0308]: mismatched types
-  --> $DIR/suggest-ref-macro.rs:26:10
+  --> $DIR/suggest-ref-macro.rs:27:10
    |
 LL |         x($v)
    |         - arguments to this function are incorrect
@@ -46,7 +46,7 @@ LL |     bla!(456);
    |          ^^^ expected `&mut i32`, found integer
    |
 note: function defined here
-  --> $DIR/suggest-ref-macro.rs:11:4
+  --> $DIR/suggest-ref-macro.rs:12:4
    |
 LL | fn x(_: &mut i32) {}
    |    ^ -----------
diff --git a/tests/ui/test-attrs/test-panic-while-printing.rs b/tests/ui/test-attrs/test-panic-while-printing.rs
index a50a15fbe5a..49e8d9c7afd 100644
--- a/tests/ui/test-attrs/test-panic-while-printing.rs
+++ b/tests/ui/test-attrs/test-panic-while-printing.rs
@@ -1,6 +1,7 @@
 //@ compile-flags:--test
 //@ run-pass
 //@ needs-unwind
+//@ ignore-backends: gcc
 
 use std::fmt;
 use std::fmt::{Display, Formatter};
diff --git a/tests/ui/threads-sendsync/task-stderr.rs b/tests/ui/threads-sendsync/task-stderr.rs
index 3934084e02a..f54b5a5cc5f 100644
--- a/tests/ui/threads-sendsync/task-stderr.rs
+++ b/tests/ui/threads-sendsync/task-stderr.rs
@@ -1,6 +1,7 @@
 //@ run-pass
 //@ needs-threads
 //@ needs-unwind
+//@ ignore-backends: gcc
 
 #![feature(internal_output_capture)]
 
diff --git a/tests/ui/threads-sendsync/unwind-resource.rs b/tests/ui/threads-sendsync/unwind-resource.rs
index ec27a1846fe..c5fbfc5bf5b 100644
--- a/tests/ui/threads-sendsync/unwind-resource.rs
+++ b/tests/ui/threads-sendsync/unwind-resource.rs
@@ -3,6 +3,7 @@
 
 #![allow(non_camel_case_types)]
 //@ needs-threads
+//@ ignore-backends: gcc
 
 use std::sync::mpsc::{channel, Sender};
 use std::thread;
diff --git a/tests/ui/track-diagnostics/track.rs b/tests/ui/track-diagnostics/track.rs
index 9ce0a4a555a..2d6d6170fe0 100644
--- a/tests/ui/track-diagnostics/track.rs
+++ b/tests/ui/track-diagnostics/track.rs
@@ -13,13 +13,8 @@
 // top of this file are present, then assume all args are present.
 //@ normalize-stderr: "note: compiler flags: .*-Z ui-testing.*-Z track-diagnostics" -> "note: compiler flags: ... -Z ui-testing ... -Z track-diagnostics"
 
-// FIXME: this tests a crash in rustc. For stage1, rustc is built with the downloaded standard
-// library which doesn't yet print the thread ID. Normalization can be removed at the stage bump.
-// For the grep: cfg(bootstrap)
-//@normalize-stderr: "thread 'rustc' panicked" -> "thread 'rustc' ($$TID) panicked"
-
 fn main() {
-    break rust
+    break rust;
     //~^ ERROR cannot find value `rust` in this scope
     //~| NOTE created at
     //~| ERROR `break` outside of a loop or labeled block
diff --git a/tests/ui/track-diagnostics/track.stderr b/tests/ui/track-diagnostics/track.stderr
index bc04ded379d..76b4bd14f5c 100644
--- a/tests/ui/track-diagnostics/track.stderr
+++ b/tests/ui/track-diagnostics/track.stderr
@@ -1,7 +1,7 @@
 error[E0425]: cannot find value `rust` in this scope
   --> $DIR/track.rs:LL:CC
    |
-LL |     break rust
+LL |     break rust;
    |           ^^^^ not found in this scope
    |
    = note: -Ztrack-diagnostics: created at compiler/rustc_resolve/src/late/diagnostics.rs:LL:CC
@@ -9,7 +9,7 @@ LL |     break rust
 error[E0268]: `break` outside of a loop or labeled block
   --> $DIR/track.rs:LL:CC
    |
-LL |     break rust
+LL |     break rust;
    |     ^^^^^^^^^^ cannot `break` outside of a loop or labeled block
    |
    = note: -Ztrack-diagnostics: created at compiler/rustc_hir_typeck/src/loops.rs:LL:CC
@@ -17,7 +17,7 @@ LL |     break rust
 error: internal compiler error: It looks like you're trying to break rust; would you like some ICE?
   --> $DIR/track.rs:LL:CC
    |
-LL |     break rust
+LL |     break rust;
    |     ^^^^^^^^^^
    |
    = note: -Ztrack-diagnostics: created at compiler/rustc_hir_typeck/src/lib.rs:LL:CC
diff --git a/tests/ui/traits/clone-unwind-rc-cleanup.rs b/tests/ui/traits/clone-unwind-rc-cleanup.rs
index cd02050ea27..dab48a1b4c6 100644
--- a/tests/ui/traits/clone-unwind-rc-cleanup.rs
+++ b/tests/ui/traits/clone-unwind-rc-cleanup.rs
@@ -2,6 +2,7 @@
 
 //@ run-pass
 //@ needs-unwind
+//@ ignore-backends: gcc
 
 #![allow(unused_variables)]
 #![allow(unused_imports)]
diff --git a/tests/ui/type-alias-impl-trait/closures_in_branches.stderr b/tests/ui/type-alias-impl-trait/closures_in_branches.stderr
index 849ffd214f0..559bc57d906 100644
--- a/tests/ui/type-alias-impl-trait/closures_in_branches.stderr
+++ b/tests/ui/type-alias-impl-trait/closures_in_branches.stderr
@@ -2,7 +2,7 @@ error[E0282]: type annotations needed
   --> $DIR/closures_in_branches.rs:8:10
    |
 LL |         |x| x.len()
-   |          ^  - type must be known at this point
+   |          ^    --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
@@ -13,7 +13,7 @@ error[E0282]: type annotations needed
   --> $DIR/closures_in_branches.rs:22:10
    |
 LL |         |x| x.len()
-   |          ^  - type must be known at this point
+   |          ^    --- type must be known at this point
    |
 help: consider giving this closure parameter an explicit type
    |
diff --git a/tests/ui/type-alias-impl-trait/method_resolution_trait_method_from_opaque.next.stderr b/tests/ui/type-alias-impl-trait/method_resolution_trait_method_from_opaque.next.stderr
index bbdd3923821..37bde4b18a4 100644
--- a/tests/ui/type-alias-impl-trait/method_resolution_trait_method_from_opaque.next.stderr
+++ b/tests/ui/type-alias-impl-trait/method_resolution_trait_method_from_opaque.next.stderr
@@ -1,8 +1,14 @@
 error[E0282]: type annotations needed
-  --> $DIR/method_resolution_trait_method_from_opaque.rs:28:9
+  --> $DIR/method_resolution_trait_method_from_opaque.rs:28:18
    |
 LL |         self.bar.next().unwrap();
-   |         ^^^^^^^^ cannot infer type
+   |                  ^^^^
+   |
+help: try using a fully qualified path to specify the expected types
+   |
+LL -         self.bar.next().unwrap();
+LL +         <_ as Iterator>::next(&mut self.bar).unwrap();
+   |
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/type-inference/regression-issue-81317.stderr b/tests/ui/type-inference/regression-issue-81317.stderr
index fcd3fca06e1..a070b50e311 100644
--- a/tests/ui/type-inference/regression-issue-81317.stderr
+++ b/tests/ui/type-inference/regression-issue-81317.stderr
@@ -5,7 +5,7 @@ LL |     let iv = S ^ index.into();
    |         ^^
 LL |
 LL |     &iv.to_bytes_be();
-   |      -- type must be known at this point
+   |         ----------- type must be known at this point
    |
 help: consider giving `iv` an explicit type
    |
diff --git a/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.rs b/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.rs
index c08030fc5c1..81c2d778b05 100644
--- a/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.rs
+++ b/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.rs
@@ -1,4 +1,5 @@
 //@ proc-macro: derive-demo-issue-136343.rs
+//@ ignore-backends: gcc
 
 #[macro_use]
 extern crate derive_demo_issue_136343;
diff --git a/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.stderr b/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.stderr
index 0b9c1d9123a..d69eaae5335 100644
--- a/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.stderr
+++ b/tests/ui/typeck/invalid-sugg-for-derive-macro-issue-136343.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/invalid-sugg-for-derive-macro-issue-136343.rs:6:10
+  --> $DIR/invalid-sugg-for-derive-macro-issue-136343.rs:7:10
    |
 LL | #[derive(Sample)]
    |          ^^^^^^
diff --git a/tests/ui/typeck/issue-13853.rs b/tests/ui/typeck/issue-13853.rs
index ac9886d2e72..ed44d506261 100644
--- a/tests/ui/typeck/issue-13853.rs
+++ b/tests/ui/typeck/issue-13853.rs
@@ -25,7 +25,7 @@ impl Node for Stuff {
 
 fn iterate<N: Node, G: Graph<N>>(graph: &G) {
     for node in graph.iter() { //~ ERROR no method named `iter` found
-        node.zomg();
+        node.zomg(); //~ ERROR type annotations needed
     }
 }
 
diff --git a/tests/ui/typeck/issue-13853.stderr b/tests/ui/typeck/issue-13853.stderr
index 45363c87d29..9b8698d6ed2 100644
--- a/tests/ui/typeck/issue-13853.stderr
+++ b/tests/ui/typeck/issue-13853.stderr
@@ -17,6 +17,12 @@ error[E0599]: no method named `iter` found for reference `&G` in the current sco
 LL |     for node in graph.iter() {
    |                       ^^^^ method not found in `&G`
 
+error[E0282]: type annotations needed
+  --> $DIR/issue-13853.rs:28:14
+   |
+LL |         node.zomg();
+   |              ^^^^ cannot infer type
+
 error[E0308]: mismatched types
   --> $DIR/issue-13853.rs:37:13
    |
@@ -37,7 +43,7 @@ help: consider borrowing here
 LL |     iterate(&graph);
    |             +
 
-error: aborting due to 3 previous errors
+error: aborting due to 4 previous errors
 
-Some errors have detailed explanations: E0308, E0599.
-For more information about an error, try `rustc --explain E0308`.
+Some errors have detailed explanations: E0282, E0308, E0599.
+For more information about an error, try `rustc --explain E0282`.
diff --git a/tests/ui/unpretty/exhaustive.hir.stdout b/tests/ui/unpretty/exhaustive.hir.stdout
index 96d85d1e7c1..27cba656030 100644
--- a/tests/ui/unpretty/exhaustive.hir.stdout
+++ b/tests/ui/unpretty/exhaustive.hir.stdout
@@ -398,7 +398,8 @@ mod expressions {
         let expr;
         format_arguments::new_const(&[]);
         {
-            super let args = [format_argument::new_display(&expr)];
+            super let args = (&expr,);
+            super let args = [format_argument::new_display(args.0)];
             format_arguments::new_v1(&[""], &args)
         };
     }
diff --git a/tests/ui/unpretty/flattened-format-args.stdout b/tests/ui/unpretty/flattened-format-args.stdout
index 0792dc10e94..233c9f1c91b 100644
--- a/tests/ui/unpretty/flattened-format-args.stdout
+++ b/tests/ui/unpretty/flattened-format-args.stdout
@@ -11,7 +11,8 @@ fn main() {
     // Should flatten to println!("a 123 b {x} xyz\n"):
     {
         ::std::io::_print({
-                super let args = [format_argument::new_display(&x)];
+                super let args = (&x,);
+                super let args = [format_argument::new_display(args.0)];
                 format_arguments::new_v1(&["a 123 b ", " xyz\n"], &args)
             });
     };