Issues

• Missing bounds check elision for integer formatting with feature = "optimize_for_size" and opt-level = "s"

  -Zbuild-stdA-fmtA-LLVMC-optimizationI-heavyT-compilerT-libs
  rust-lang/rust#165280 · Filter by author seritools opened on Nov 1, 2026
  2

  

• error: rustc interrupted by SIGSEGV, printing backtrace

  A-LLVMC-bugI-crashS-needs-reproT-compiler
  rust-lang/rust#165278 · Filter by author grcurtis27 opened on Nov 1, 2026
  1

• [Debuginfo] Emit artificial static field representing generic params on MSVC

  A-LLVMS-waiting-on-reviewT-compiler
  Unread
  rust-lang/rust#165267·Walnut356 opened Nov 1, 2026 · Updated Nov 1, 2026
  2

  

• Missing instructions in m68k inline assembly

  A-inline-assemblyA-LLVMC-bugO-motorola68k
  rust-lang/rust#165239 · Filter by author ketsuban opened on Oct 31, 2026
  5

• Make -Zcf-protection work on RISC-V

  A-LLVMPG-exploit-mitigationsS-waiting-on-reviewT-compiler
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  rust-lang/rust#165215·shuffle2 opened Oct 31, 2026 · Updated Oct 31, 2026
  3

  

• x86_64: shrink-wrapped prologue's inline stack probe clobbers a live r11 (miscompilation in safe code)

  A-LLVME-needs-bisectionI-miscompileI-prioritizeO-x86_64regression-from-stable-to-stableT-compilerWG-llvm
  rust-lang/rust#165204 · Filter by author lbguilherme opened on Oct 30, 2026
  1

• make rlib object names deterministic

  A-LLVMA-run-makeS-waiting-on-reviewT-compiler
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  rust-lang/rust#165202·paradoxicalguy opened Oct 30, 2026 · Updated Nov 1, 2026
  6

  

• [beta] backports

  A-LLVMS-waiting-on-authorT-compilerT-libs
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  rust-lang/rust#165162·cuviper opened Oct 29, 2026 · Updated Nov 1, 2026
  11

  

• Miscompilation of safe rust into a vectorised out-of-bound read.

  A-LLVMC-bugI-miscompileI-prioritizellvm-fixed-upstreamT-compilerWG-llvm
  rust-lang/rust#165156 · Filter by author JakubCzarlinski opened on Oct 29, 2026
  3

• Remove typed allocas and geps from gpu_offload.rs

  A-LLVMS-waiting-on-reviewT-compiler
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  rust-lang/rust#165154·beetrees opened Oct 29, 2026 · Updated Nov 1, 2026
  6

  

• Various incr comp session refactors

  A-LLVMS-waiting-on-reviewT-compiler
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  rust-lang/rust#165145·bjorn3 opened Oct 29, 2026 · Updated Oct 29, 2026
  6

  

• WIP: Deprecate Iterator::unzip

  A-LLVMA-query-systemS-waiting-on-authorT-clippyT-libsT-rust-analyzerT-rustdoc-frontend
  Unread
  rust-lang/rust#165105·bushrat011899 opened Oct 28, 2026 · Updated Oct 29, 2026·Draft
  7

• Propagate block coldness across unwind edges and mark cold callsites

  A-LLVMperf-regressionS-waiting-on-reviewT-compiler
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  rust-lang/rust#165101·stephenduong1004 opened Oct 28, 2026 · Updated Oct 29, 2026
  11

  

• Check type alignment is <= type size in data layout parser

  A-LLVMS-waiting-on-reviewT-compiler
  Unread
  rust-lang/rust#165090·beetrees opened Oct 28, 2026 · Updated Nov 1, 2026
  6

  

• 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

• 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
  6

• 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
  26

• 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

• 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

• 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

• Add SIMD algebraic intrinsics

  A-LLVMS-waiting-on-reviewT-compilerT-libs
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  rust-lang/rust#164952·calebzulawski opened Oct 26, 2026 · Updated Oct 31, 2026
  44

  

• x86 codegen issue with u128::ilog2

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

• __isPlatformVersionAtLeast &__isOSVersionAtLeast from std are dropped by LTO, making them unavailable for native code that might need them

  A-linkersA-LLVMA-LTOC-bugO-appleT-compiler
  rust-lang/rust#164915 · Filter by author DirtyHairy opened on Oct 25, 2026
  4

• offload: pass the linked device image to the host pass

  A-LLVMF-gpu_offloadS-waiting-on-reviewT-compiler
  Unread
  rust-lang/rust#164896·sgasho opened Oct 25, 2026 · Updated Nov 1, 2026
  9