Issues

• Unsoundness due to user-provided Pattern impl returning an incorrect Searcher

  A-strC-bugI-unsoundrequires-nightlyT-libs
  rust-lang/rust#165076 · Filter by author theemathas opened on Oct 28, 2026
  1

  

• What to do with pre-expansion linting?

  A-lintsI-lang-nominatedI-lang-radarT-lang
  rust-lang/rust#165073 · Filter by author JonathanBrouwer opened on Oct 28, 2026
  2

  

• Bad wording in "std::mem::take()" docs

  A-docsE-easyT-libs
  rust-lang/rust#165065 · Filter by author artshell opened on Oct 28, 2026
  3

  

• Accidental stabilization of z template modifiers

  A-inline-assemblyA-stabilityI-lang-nominatedI-lang-radarP-lang-drag-0regression-from-stable-to-betaT-compilerT-lang
  rust-lang/rust#165055 · Filter by author traviscross opened on Oct 27, 2026
  

• [ICE]: assertion failed: !parts.is_empty()

  C-bugI-ICEneeds-triageT-compiler
  rust-lang/rust#165052 · Filter by author matthiaskrgr opened on Oct 27, 2026
  1

• as_chunks_mut loop vectorizes worse than the equivalent chunks_exact_mut loop (x86-64, small constant trip count)

  A-iteratorsA-LLVMC-optimization
  rust-lang/rust#165050 · Filter by author mjsabby opened on Oct 27, 2026

• f32::powi on Windows returns incorrect sign on Windows

  A-floating-pointA-LLVMC-bugO-windowsT-compilerT-libs
  rust-lang/rust#165045 · Filter by author wingertge opened on Oct 27, 2026
  1

• [ICE]: "Cannot emit physreg copy instruction" from SimdConstPtr::is_null() with target-feature=+avx and no optimization

  A-SIMDA-target-featureC-bugF-portable_simdI-ICEI-llvm-errorPG-portable-simdT-compilerWG-llvm
  rust-lang/rust#165043 · Filter by author Arnavion opened on Oct 27, 2026

• msan makes noundef an ABI attribute, breaking Rust ABI promises

  A-ABIA-LLVMA-sanitizersT-compilerT-opsem
  rust-lang/rust#165040 · Filter by author RalfJung opened on Oct 27, 2026
  3

• disk full during compilation very badly handled

  A-diagnosticsC-enhancementT-compiler
  rust-lang/rust#165039 · Filter by author ijackson opened on Oct 27, 2026
  4

• [ICE]: self-type &Cell<(dyn Bar + 'static)> for ObjectPick never dereferenced to an object

  C-bugI-ICES-has-bisectionT-compilerT-types
  rust-lang/rust#165033 · Filter by author cushionbadak opened on Oct 27, 2026
  2

• Incorrect / dubious LLVM-level ABI for two-variant #[repr(u8)] enums: lowered to i1

  A-ABIA-codegenA-enumA-LLVMA-reprC-bugT-compiler
  rust-lang/rust#165026 · Filter by author mversic opened on Oct 26, 2026
  22

• gca: Better structured suggestion if the gca! macro is missed off

  A-diagnosticsD-lack-of-suggestionF-gca_const_itemsF-gca_min_const_itemsT-compiler
  rust-lang/rust#164999 · Filter by author farnz opened on Oct 26, 2026
  1

  

• [ICE][nightly]: "broken MIR in Shim(FutureDropPoll(..)) ... adt field has the wrong type" with async_drop and a reassigned local

  C-bugF-async_dropI-ICET-compiler
  rust-lang/rust#164995 · Filter by author hazohelet opened on Oct 26, 2026

• huge-stacks.rs with -C opt-level=0 fails on aarch64-pc-windows-msvc with LLVM error

  A-LLVMC-bugI-llvm-errorO-aarch64-pc-windows-msvcT-compiler
  rust-lang/rust#164988 · Filter by author nikic opened on Oct 26, 2026
  1

• Tracking Issue for NEON bf16

  C-tracking-issue
  rust-lang/rust#164986 · Filter by author Jamesbarford opened on Oct 26, 2026

• UB with use std::intrinsics::abort_immediate as main;

  A-codegenA-intrinsicsA-runtimeC-bugF-core_intrinsicsI-unsoundrequires-internal-featuresT-compilerT-types
  rust-lang/rust#164984 · Filter by author theemathas opened on Oct 26, 2026
  2

• Slice fold is sometimes slower than slice for loop

  A-iteratorsA-LLVMA-sliceC-optimizationT-libs
  rust-lang/rust#164983 · Filter by author LHolten opened on Oct 26, 2026
  2

• enabling feature(async_drop) makes async blocks holding recursive type not compile

  A-async-awaitA-destructorsA-enumC-bugF-async_dropT-compilerT-typesWG-async
  rust-lang/rust#164977 · Filter by author hazohelet opened on Oct 26, 2026
  1

• Nonsensical "consider converting the String to a &str using .as_str()" suggestion inside matches! macro for E0308

  A-diagnosticsD-invalid-suggestionT-compiler
  rust-lang/rust#164973 · Filter by author epilys opened on Oct 26, 2026
  2

  

• f16 -> i128 cast has wrong behavior on aarch64-linux

  A-LLVMC-bugF-f16_and_f128I-miscompileT-compilerWG-llvm
  rust-lang/rust#164972 · Filter by author RalfJung opened on Oct 26, 2026
  1

• std::process::Command doesn't escape/reject % in bat script paths on windows

  A-filesystemC-bugO-windowsT-libs
  rust-lang/rust#164943 · Filter by author cueballcipher opened on Oct 26, 2026
  5

• x86 codegen issue with u128::ilog2

  A-LLVMC-optimizationI-slow
  rust-lang/rust#164938 · Filter by author d0sboots opened on Oct 26, 2026
  1

• Remove Span::eq_ctxt

  E-easyT-clippyT-compiler
  rust-lang/rust#164936 · Filter by author nnethercote opened on Oct 25, 2026
  1

  

• [ICE]: Cannot implement Reborrow on a type containing a &'static mut T field

  C-bugF-reborrowI-ICEneeds-triageT-compiler
  rust-lang/rust#164933 · Filter by author matthiaskrgr opened on Oct 25, 2026
  2