Issues

• arithmetic_overflow is missed after x >>= n when overflow checks are on

  C-bugneeds-triage
  rust-lang/rust#164191 · Filter by author zxt5 opened on Oct 12, 2026

• Crash at opt-level=3 in LLVM loop unrolling on a nested enumerate/step_by loop

  C-bugneeds-triage
  rust-lang/rust#164185 · Filter by author zxt5 opened on Oct 12, 2026

• The formal conditions stated in Trait PartialOrd give surprising results

  A-docsneeds-triage
  rust-lang/rust#164184 · Filter by author georgeef opened on Oct 11, 2026
  2

• fail to compile proc-macro-crate with LSAN enable

  C-bugneeds-triage
  rust-lang/rust#164183 · Filter by author frostyplanet opened on Oct 11, 2026

• Tracking issue for release notes of #162927: stabilize ptr_cast_slice

  relnotesrelnotes-needs-reviewrelnotes-tracking-issueT-libs
  rust-lang/rust#164182 · Filter by author rustbot opened on Oct 11, 2026

• [ICE]: could not compile iroh-blobs (lib)

  C-bugI-ICEneeds-triageT-compiler
  rust-lang/rust#164180 · Filter by author emmyoh opened on Oct 11, 2026

• [ICE]: failure building std for riscv32imac-esp-espidf target, since 2026-10-10

  C-bugI-ICEneeds-triageT-compiler
  rust-lang/rust#164177 · Filter by author finalyards opened on Oct 11, 2026

• ScalarReplacementOfAggregates doesn't handle ManuallyDrop/MaybeDangling

  A-mir-optC-bugI-miscompileI-prioritizeneeds-triageT-compiler
  rust-lang/rust#164176 · Filter by author saethlin opened on Oct 11, 2026

• Emit thin-link-bitcode causes ThinLTOBitcodeWriterPass to run twice

  A-LTOC-bugneeds-triage
  rust-lang/rust#164172 · Filter by author jakos-sec opened on Oct 11, 2026

• Wrong hint for multiple mutable borrows

  A-borrow-checkerA-diagnosticsD-confusingD-incorrectT-compiler
  rust-lang/rust#164169 · Filter by author alexkazik opened on Oct 11, 2026
  3

• Test binaries output the expected panic messages from successful #[should_panic] tests

  A-libtestA-panicC-discussionC-enhancementT-libsT-testing-devex
  rust-lang/rust#164164 · Filter by author dead-claudia opened on Oct 11, 2026
  2

• Unsound two-phase borrow accepted by compiler

  A-borrow-checkerC-bugI-prioritizeI-unsoundT-types
  rust-lang/rust#164163 · Filter by author jsnell opened on Oct 11, 2026
  3

• 1.100 beta crater regression: "can't find crate for docmatic"

  C-bugI-prioritizeregression-from-stable-to-betaS-has-bisectionT-cargo
  rust-lang/rust#164160 · Filter by author theemathas opened on Oct 11, 2026
  2

• 1.100 beta rustdoc crater regression: "called Option::unwrap() on a None value" in librustdoc/clean/mod.rs

  A-edition-2015A-HIRC-bugI-ICEI-prioritizeregression-from-stable-to-betaS-has-mcveT-compilerT-rustdoc
  rust-lang/rust#164158 · Filter by author theemathas opened on Oct 11, 2026
  12

• -Cinstrument-coverage on incomplete/non-returning function invocations makes sibling branches of exit underflow (wrap to UINT64_MAX)

  A-code-coverageC-bugI-prioritizeneeds-triageregression-from-stable-to-stableT-compiler
  rust-lang/rust#164153 · Filter by author Snehal-Reddy opened on Oct 11, 2026

• Tracking Issue for Vec::retain_unstable

  C-tracking-issueS-tracking-unimplementedT-libs
  rust-lang/rust#164152 · Filter by author asder8215 opened on Oct 11, 2026

• try_as_dyn ignores impls which use T in a generic type

  C-bugF-try_as_dynT-types
  rust-lang/rust#164149 · Filter by author nazar-pc opened on Oct 11, 2026
  7

• 1.100 beta crater regression: "No space left on device" and massive slowdown during doctests

  A-doctestsA-libtestC-bugE-needs-mcveI-prioritizeneeds-triageregression-from-stable-to-betaS-has-bisectionT-libs
  rust-lang/rust#164145 · Filter by author theemathas opened on Oct 11, 2026
  11

• raw-borrows-via-references eats casts

  A-suggestion-diagnosticsC-bugD-invalid-suggestionneeds-triage
  rust-lang/rust#164144 · Filter by author matthiaskrgr opened on Oct 11, 2026

• innvalid invalid_nan_comparisons breaks: no method named is_nan found for reference &{float}

  A-diagnosticsA-floating-pointA-suggestion-diagnosticsC-bugD-invalid-suggestionL-invalid_nan_comparisonsT-compiler
  rust-lang/rust#164143 · Filter by author matthiaskrgr opened on Oct 11, 2026

• invalid_doc_attributes should not suggest nightly features on stable

  A-rustdoc-uiA-suggestion-diagnosticsC-bugD-invalid-suggestionneeds-triageT-rustdoc-frontend
  rust-lang/rust#164142 · Filter by author matthiaskrgr opened on Oct 11, 2026

• 1.100 beta crater regression: Behavior change with #[derive(Ord)] and manual impl PartialOrd

  A-iteratorsC-bugI-prioritizeregression-from-stable-to-betaS-has-bisectionS-has-mcveT-libs
  rust-lang/rust#164141 · Filter by author theemathas opened on Oct 11, 2026
  6

• -C opt-level=1 miscompiles raw-pointer access through static mut into ud2

  A-LLVMC-bugI-miscompileP-medium
  rust-lang/rust#164137 · Filter by author 466774321-code opened on Oct 11, 2026
  1

  

• 1.100 beta crater regression: cannot find type OrderRepository in this scope

  C-bugE-needs-bisectionE-needs-mcveI-prioritizeneeds-triageregression-from-stable-to-beta
  rust-lang/rust#164136 · Filter by author theemathas opened on Oct 11, 2026
  1

• EarlyOtherwiseBranch can cause matches to read more bytes of the scrutinee

  A-mir-optC-bugI-miscompileI-prioritizeneeds-triageT-compiler
  rust-lang/rust#164135 · Filter by author saethlin opened on Oct 11, 2026