Issues

• -Zlocation-detail can cause mismatched const values, leading to unsoundness

  A-const-evalA-const-genericsC-bugI-miscompileI-unsoundrequires-nightlyT-compiler
  rust-lang/rust#164601 · Filter by author clubby789 opened on Oct 19, 2026
  1

• ReferencePropagation incorrectly increases alignment of raw field loads

  A-mir-optC-bugI-miscompileI-prioritize
  rust-lang/rust#164599 · Filter by author YunusMutlu opened on Oct 19, 2026
  1

• Compile time: changing one low crate recompiles every dependent crate — a field report from a 270-crate project

  C-enhancementI-compiletime
  rust-lang/rust#164598 · Filter by author IlleNilsson opened on Oct 19, 2026

• Overlapping spans when implementing generic foreign trait for foreign type (E0117)

  A-diagnosticsD-non-disjoint-spansD-papercutT-compiler
  rust-lang/rust#164592 · Filter by author maxdexh opened on Oct 19, 2026
  2

• 1.100 beta crater regression: Name collision with Vec::from_fn

  C-bugI-prioritizeregression-from-stable-to-betaT-libs
  rust-lang/rust#164589 · Filter by author theemathas opened on Oct 19, 2026

• lldb_providers: &str summary reads the whole claimed length, so a bogus length hangs the debugger and exhausts memory

  A-debuggersA-debuggers-lldbC-bugWG-debugging
  rust-lang/rust#164588 · Filter by author SiddharthPant opened on Oct 19, 2026

• Rustc can't handle non-UTF-8 input paths, but only when RUST_BACKTRACE is not set

  A-driverA-UnicodeC-bugI-crashT-compiler
  rust-lang/rust#164585 · Filter by author theemathas opened on Oct 19, 2026
  9

• [ICE]: aarch64-unknown-linux-gnu segfault in llvm

  A-LLVMC-bugI-crashI-llvm-errorI-prioritizellvm-fixed-upstreamregression-from-stable-to-stableT-compiler
  rust-lang/rust#164584 · Filter by author Firestar99 opened on Oct 19, 2026
  6

  

• Error message from using a path to a non-exported macro_rules! should mention suggest exporting

  A-diagnosticsA-macrosD-lack-of-suggestionD-newcomer-roadblockT-compiler
  rust-lang/rust#164580 · Filter by author ts826848 opened on Oct 19, 2026
  1

• Inconsistent Location::caller() const-evaluation across crates due to tab expansion

  A-const-evalA-const-genericsA-cratesA-panicC-bugI-ICEI-miscompileI-prioritizeI-unsoundregression-from-stable-to-stableS-has-bisectionT-compilerT-lang
  rust-lang/rust#164574 · Filter by author jsnell opened on Oct 19, 2026
  12

• [ICE]: can't type-check body of DefId when borrow-checking a const expression in an array length

  A-borrow-checkerA-const-evalC-bugI-ICEP-mediumregression-from-stable-to-stableS-has-bisectionT-compilerT-types
  rust-lang/rust#164572 · Filter by author sososopy opened on Oct 19, 2026
  3

• export_name on provided trait associated functions has funny behavior

  A-attributesA-codegenA-linkersA-mir-optC-bugI-prioritizeregression-from-stable-to-stableS-has-bisectionT-compilerT-lang
  rust-lang/rust#164571 · Filter by author theemathas opened on Oct 19, 2026
  1

• [ICE]: insertion index (is 18446744073709551615) should be <= len (is 0)

  A-const-genericsC-bugI-ICEP-mediumregression-from-stable-to-nightlyT-compiler
  rust-lang/rust#164570 · Filter by author sososopy opened on Oct 19, 2026
  1

• Tidy complains about itself when remap-debuginfo = true

  A-tidyC-bugrequires-custom-configT-bootstrap
  rust-lang/rust#164567 · Filter by author xlambein opened on Oct 19, 2026
  2

• moving a Box out of a packed struct creates a misaligned &mut Box to drop it

  A-boxA-destructorsA-repr-packedC-bugI-unsoundP-mediumT-compilerT-opsem
  rust-lang/rust#164561 · Filter by author jsnell opened on Oct 19, 2026
  2

• riscv32*-esp-espidf compile failed, missing value st_*time

  C-bugO-ESP-IDFO-riscvT-libs
  rust-lang/rust#164555 · Filter by author Wyvern opened on Oct 19, 2026
  1

• Hang for a well-formedness check of a struct whose field type is a projection on the struct itself

  A-associated-itemsC-bugfixed-by-next-solverI-hangT-types
  rust-lang/rust#164553 · Filter by author leeewee opened on Oct 19, 2026

• Hang after E0207 (unconstrained impl type parameter); regression in 1.78

  C-bugfixed-by-next-solverI-hangI-prioritizeregression-from-stable-to-stableT-types
  rust-lang/rust#164552 · Filter by author leeewee opened on Oct 19, 2026

• [ICE]: Failed to normalize in const validation (opsem inhabitedness check) after an unsatisfied struct field bound

  A-const-evalA-trait-systemC-bugI-ICEI-prioritizeregression-from-stable-to-stableT-compilerT-opsemT-types
  rust-lang/rust#164551 · Filter by author leeewee opened on Oct 19, 2026
  2

• Lifetime requirements from calls and closures in unreachable code are not checked

  A-borrow-checkerA-closuresC-discussionT-types
  rust-lang/rust#164550 · Filter by author leeewee opened on Oct 19, 2026
  1

• Old trait solver: item bounds of a default type are not checked when the impl header contains a projection

  A-associated-itemsC-bugF-specializationfixed-by-next-solverI-unsoundT-types
  rust-lang/rust#164548 · Filter by author leeewee opened on Oct 18, 2026

• Old trait solver: for<T> T: 'static (non-lifetime binder) is evaluated as true, which allows a 'static lifetime extension

  A-higher-rankedC-bugF-non_lifetime_bindersF-sized_hierarchyfixed-by-next-solverI-unsoundT-types
  rust-lang/rust#164547 · Filter by author leeewee opened on Oct 18, 2026

• Miscompile on aarch64-apple-darwin since LLVM 23: thin LTO with overflow checks breaks a PNG encode-decode roundtrip for fdeflate.

  A-LLVMA-LTOC-bugI-miscompilellvm-fixed-upstreamO-AArch64P-highregression-from-stable-to-stableS-has-bisectionS-has-mcveT-compiler
  rust-lang/rust#164536 · Filter by author LtdJorge opened on Oct 18, 2026
  6

• Cranelift miscompiles u128 jump tables that start past 2^63

  A-craneliftC-bugI-miscompileneeds-triagerequires-nightlyT-compiler
  rust-lang/rust#164534 · Filter by author saethlin opened on Oct 18, 2026
  1

• Add CodegenBackend method to check supported features

  A-codegenC-cleanupC-tracking-issueT-compiler
  rust-lang/rust#164533 · Filter by author TechnoPorg opened on Oct 18, 2026
  7