Forbid CHECK: br and CHECK-NOT: br in codegen tests (suggest br {{.*}} instead)
#149190
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v0 mangling can produce symbols with 'br' as a substring, leading to false positives for CHECK-NOT
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Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (suggest `br {{.*}}` instead)
`// CHECK-NOT: br` is fragile to false positives in mangled symbol names, while `// CHECK-NOT: br {{.*}}` is not. Remove and forbid the former in codegen tests, and suggest the latter.
cc rust-lang#149125 (comment) where this caused a CI failure due to a v0 mangled symbol containing `br` in a disambiguator/crate hash/something.
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Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (suggest `br {{.*}}` instead)
`// CHECK-NOT: br` is fragile to false positives in mangled symbol names, while `// CHECK-NOT: br {{.*}}` is not. Remove and forbid the former in codegen tests, and suggest the latter.
cc rust-lang#149125 (comment) where this caused a CI failure due to a v0 mangled symbol containing `br` in a disambiguator/crate hash/something.
Zalathar
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Nov 26, 2025
Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (suggest `br {{.*}}` instead)
`// CHECK-NOT: br` is fragile to false positives in mangled symbol names, while `// CHECK-NOT: br {{.*}}` is not. Remove and forbid the former in codegen tests, and suggest the latter.
cc rust-lang#149125 (comment) where this caused a CI failure due to a v0 mangled symbol containing `br` in a disambiguator/crate hash/something.
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Rollup of 19 pull requests Successful merges: - #148048 (Stabilize `maybe_uninit_write_slice`) - #148641 (Add a diagnostic attribute for special casing const bound errors for non-const impls) - #148765 (std: split up the `thread` module) - #149074 (Add Command::get_env_clear) - #149097 (num: Implement `uint_gather_scatter_bits` feature for unsigned integers) - #149131 (optimize `slice::Iter::next_chunk`) - #149190 (Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (suggest `br {{.*}}` instead)) - #149239 (clarify float min/max behavios for NaNs and signed zeros) - #149243 (Fix typo and clarify bootstrap change tracker entry) - #149270 (implement `Iterator::{exactly_one, collect_array}`) - #149295 (Suggest _bytes versions of endian-converting methods) - #149301 (Motor OS: make decode_error_kind more comprehensive) - #149306 (bootstrap: Miri now handles jemalloc like everything else) - #149325 (rustdoc: add regression test for #140968) - #149332 (fix rustdoc search says “Consider searching for "null" instead.” #149324) - #149349 (Fix typo in comment.) - #149353 (Tidying up UI tests [3/N]) - #149355 (Document that `build.description` affects symbol mangling and crate IDs) - #149360 (Enable CI download for windows-gnullvm) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 12 pull requests Successful merges: - #147115 (More robust stack protector testing) - #148048 (Stabilize `maybe_uninit_write_slice`) - #148641 (Add a diagnostic attribute for special casing const bound errors for non-const impls) - #149074 (Add Command::get_env_clear) - #149097 (num: Implement `uint_gather_scatter_bits` feature for unsigned integers) - #149131 (optimize `slice::Iter::next_chunk`) - #149190 (Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (suggest `br {{.*}}` instead)) - #149239 (clarify float min/max behavios for NaNs and signed zeros) - #149243 (Fix typo and clarify bootstrap change tracker entry) - #149301 (Motor OS: make decode_error_kind more comprehensive) - #149306 (bootstrap: Miri now handles jemalloc like everything else) - #149325 (rustdoc: add regression test for #140968) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #149190 - zachs18:chilly, r=Mark-Simulacrum Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (suggest `br {{.*}}` instead) `// CHECK-NOT: br` is fragile to false positives in mangled symbol names, while `// CHECK-NOT: br {{.*}}` is not. Remove and forbid the former in codegen tests, and suggest the latter. cc #149125 (comment) where this caused a CI failure due to a v0 mangled symbol containing `br` in a disambiguator/crate hash/something.
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// CHECK-NOT: bris fragile to false positives in mangled symbol names, while// CHECK-NOT: br {{.*}}is not. Remove and forbid the former in codegen tests, and suggest the latter.cc #149125 (comment) where this caused a CI failure due to a v0 mangled symbol containing
brin a disambiguator/crate hash/something.