Issues

• Tracking issue for release notes of #163267: fix VisibleForLeakCheck in RegionOutlives fast path

  needs-triagerelnotesrelnotes-needs-reviewrelnotes-tracking-issueT-compilerT-typesWG-trait-system-refactor
  rust-lang/rust#163836 · Filter by author rustbot opened on Oct 5, 2026

• 1.100-beta regression: the trait Parser is not dyn compatible

  C-bugE-needs-bisectionE-needs-mcveI-prioritizeneeds-triageregression-from-stable-to-beta
  rust-lang/rust#163834 · Filter by author mejrs opened on Oct 5, 2026
  1

• 1.100-beta regression: box patterns have been removed (feature box_patterns)

  I-prioritizeneeds-triageregression-from-stable-to-betaT-lang
  rust-lang/rust#163830 · Filter by author mejrs opened on Oct 5, 2026
  1

• GVN versus unions with reference fields

  A-mir-optA-mir-opt-GVNC-bugI-miscompileI-prioritizeT-compiler
  rust-lang/rust#163825 · Filter by author saethlin opened on Oct 5, 2026

• 1.100-beta regression: Code is ambiguous

  A-resolveC-bugI-prioritizeregression-from-stable-to-betaS-has-mcveT-compilerT-langT-libs
  rust-lang/rust#163822 · Filter by author mejrs opened on Oct 5, 2026
  3

• 1.100-beta regression: bool::toggle collides with extension method of the same name but different signature

  C-bugI-prioritizeneeds-triageregression-from-stable-to-betaT-libs
  rust-lang/rust#163820 · Filter by author mejrs opened on Oct 5, 2026
  3

• [ICE]: unnormalized aliases in borrowck when calling an HRTB factory returning boxed FnMut over a GAT

  A-dyn-traitA-GATsA-higher-rankedC-bugI-ICEI-prioritizeregression-from-stable-to-nightlyS-has-bisectionS-has-mcveT-compilerT-typesWG-trait-system-refactor
  rust-lang/rust#163817 · Filter by author gbin opened on Oct 5, 2026
  3

• test tidy is stricter in the pull requests CI than the Git hook

  A-tidyC-bugT-bootstrap
  rust-lang/rust#163815 · Filter by author ChaiTRex opened on Oct 5, 2026

• inherent associated type normalization can suceed while resulting in unconstrained infer vars

  F-inherent_associated_typesrequires-nightlyT-types
  rust-lang/rust#163812 · Filter by author lcnr opened on Oct 5, 2026
  2

• Draft release notes for 1.100.0

  relnotes-tracking-issueT-release
  rust-lang/rust#163811 · Filter by author BoxyUwU opened on Oct 5, 2026
  2

• 1.100 beta regression: panicked at compiler/rustc_hir_typeck/src/method/confirm.rs:762:54: index out of bounds: the len is 0 but the index is 0

  C-bugE-needs-bisectionE-needs-mcveI-prioritizeneeds-triageregression-from-stable-to-beta
  rust-lang/rust#163804 · Filter by author mejrs opened on Oct 5, 2026
  2

• 1.100 beta regression: the Self constructor can only be used with tuple or unit structs

  A-macrosA-proc-macrosA-resolveC-bugI-prioritizeregression-from-stable-to-betaT-compilerT-lang
  rust-lang/rust#163800 · Filter by author mejrs opened on Oct 5, 2026
  1

  

• Unnameable types lint should't fire on Sealed trait

  A-diagnosticsA-visibilityL-unnameable_typesT-compiler
  rust-lang/rust#163797 · Filter by author ijackson opened on Oct 5, 2026
  3

• Diagnostic is confusing: expected Foo<_>, found Foo<(), u32>

  A-diagnosticsD-confusingT-compilerT-types
  rust-lang/rust#163792 · Filter by author gendx opened on Oct 5, 2026
  1

• [ICE]: generic_const_exprs causes a crash between crates on nightly with new trait solver

  C-bugF-generic_const_exprsI-ICET-typesWG-trait-system-refactor
  rust-lang/rust#163791 · Filter by author enbyted opened on Oct 5, 2026
  3

• -Znext-solver Confusing item does not constrain {opaque} diagnostics on overflowing opaques

  A-diagnosticsD-confusingF-type_alias_impl_traitT-compilerWG-trait-system-refactor
  rust-lang/rust#163784 · Filter by author ShoyuVanilla opened on Oct 5, 2026
  1

• With GVN, Miri flags loads of a const packed struct field as insufficiently aligned

  A-mir-optA-mir-opt-GVNC-bugI-miscompileP-highT-compiler
  rust-lang/rust#163782 · Filter by author saethlin opened on Oct 5, 2026
  2

• SsaRangePropagation propagates range information from optional asserts

  A-mir-optC-bugI-miscompileP-highregression-from-stable-to-stableT-compiler
  rust-lang/rust#163779 · Filter by author saethlin opened on Oct 5, 2026
  3

  

• ReferencePropagation looks through field projections to find reborrow chains, but not when replacing

  A-mir-optC-bugI-miscompileP-highT-compiler
  rust-lang/rust#163777 · Filter by author saethlin opened on Oct 5, 2026
  2

  

• [ICE]: unstable fingerprints for evaluate_obligation(d40445186fc295cc-99705675039751b2)

  C-bugE-needs-mcveI-ICEneeds-triageT-compiler
  rust-lang/rust#163760 · Filter by author Enet4 opened on Oct 4, 2026
  2

• ./x check being killed (by rust-analyzer) may leave .git/index.lock file

  C-bugneeds-triageT-bootstrapT-rust-analyzer
  rust-lang/rust#163751 · Filter by author qouteall opened on Oct 4, 2026
  6

• Regression 1.98 → 1.99: thread_local! destructors no longer run at thread exit on wasm32-wasip1-threads

  A-thread-localsC-bugI-prioritizeO-wasiregression-from-stable-to-stableT-libs
  rust-lang/rust#163748 · Filter by author Brooooooklyn opened on Oct 4, 2026
  3

  

• [codegen] Matching on i32::cmp materializes Ordering instead of branching directly on comparison flags

  C-optimizationneeds-triage
  rust-lang/rust#163747 · Filter by author Yanwords opened on Oct 4, 2026

• Tracking Issue for movdir64b_target_feature and movdiri_target_feature

  A-target-featureC-tracking-issueneeds-triageS-tracking-unimplemented
  rust-lang/rust#163741 · Filter by author jlpetz opened on Oct 4, 2026

• Tracking Issue for non-ZST allocators

  C-tracking-issueS-tracking-unimplementedT-libs
  rust-lang/rust#163738 · Filter by author clarfonthey opened on Oct 4, 2026