Issues

• [windows] Test the compilers against the platform SDK's standard library

  swiftlang/swift#93501 · Filter by author charles-zablit opened on Oct 21, 2026
  

• Task group child's captured Int comes back as 0 under -O when it returns (i, .success(try await f())) from a do/catch

  swiftlang/swift#93500 · Filter by author williamliu0516 opened on Oct 21, 2026

• Type inference for generic V? in if let x = f() ?? [] changed in Swift 6.3, affecting runtime behaviour

  triage needed
  Bug

  swiftlang/swift#93459 · Filter by author maxchuquimia opened on Oct 20, 2026

• -O leaks self when super.init arguments contain Array.map after a conditional property assignment

  triage needed
  Bug

  swiftlang/swift#93457 · Filter by author peterc-poly opened on Oct 20, 2026
  1

• .span of a static let InlineArray copies it to the stack, unlike a global let

  triage needed
  Bug

  swiftlang/swift#93456 · Filter by author cjchapman opened on Oct 19, 2026
  1

• CanTypeDifferenceVisitor doesn't compare parent types

  crashtype checker
  Bug

  swiftlang/swift#93446 · Filter by author a-viv-a opened on Oct 19, 2026
  2

• [build-script] WasmKit build hardcodes a universal macOS build despite --swift-darwin-supported-archs

  build-script
  Bug

  swiftlang/swift#93445 · Filter by author glessard opened on Oct 19, 2026

• Installer failure installing for all users

  InfrastructureWindows
  swiftlang/swift#93443 · Filter by author owenv opened on Oct 19, 2026
  2

  

• defer containing await inside a closure runs on the generic executor instead of the closure's actor

  concurrency
  Bug

  swiftlang/swift#93432 · Filter by author kevin-palser opened on Oct 19, 2026
  3

  

• SIL verification failure when using opaque types and a public -> public -> not public call chain

  crashtriage needed
  Bug

  swiftlang/swift#93420 · Filter by author wadetregaskis opened on Oct 19, 2026

• Embedded: sourcekitd crashes in MandatorySILLinker ("SILGen failed to emit required conformance") on existential erasure with the conformance in another file

  swiftlang/swift#93417 · Filter by author ninovanhooff opened on Oct 18, 2026

• Repeated @available attributes for the same platform produce an invalid .swiftinterface

  swiftlang/swift#93415 · Filter by author Kyle-Ye opened on Oct 18, 2026

• Lifetime dependence is lost when an address-only ~Escapable value is stored into an Optional

  triage needed
  Bug

  swiftlang/swift#93414 · Filter by author hassila opened on Oct 18, 2026

• AccessEnforcementOpts leaves a merged access scope open on a loop's continue edge: false exclusivity trap at -O

  swiftlang/swift#93411 · Filter by author patp opened on Oct 18, 2026

• OSSACompleteLifetime crash at -O: SILCombine leaks a copy of a borrowed class reference stored in two noncopyable fields

  swiftlang/swift#93409 · Filter by author nicholas-lonsinger opened on Oct 18, 2026

• Compiler crash in CopyPropagation for XCTAssertNil of generic call record's optional tuple field at -O

  crashtriage needed
  Bug

  swiftlang/swift#93408 · Filter by author AKoulabukhov opened on Oct 17, 2026
  1

• [SILGen] verifyTrivialLowering asserts ("Non-nominal type without conformance to BitwiseCopyable: some P") for a struct with an opaque-typed stored property (a _modify witness, or an explicit init() at -O)

  crashtriage needed
  Bug

  swiftlang/swift#93395 · Filter by author YuanchengJiang opened on Oct 17, 2026

• DiagnoseStaticExclusivity: findClosureStoredIntoBlock asserts "Couldn't find single store of function into block storage"

  crashtriage needed
  Bug

  swiftlang/swift#93366 · Filter by author ChoKyuWon opened on Oct 16, 2026

• SILInliner drops the destroy of an @in_cxx argument when the apply is not a deinit barrier ("memory is initialized, but shouldn't be" after EarlyPerfInliner)

  crashtriage needed
  Bug

  swiftlang/swift#93365 · Filter by author ChoKyuWon opened on Oct 16, 2026

• Swift 6.4 SILGenCleanup abort capturing an implicitly borrowed noncopyable callback parameter

  crashtriage needed
  Bug

  swiftlang/swift#93364 · Filter by author ThorFuchs opened on Oct 16, 2026

• Miscompile on arm64 at -O: AArch64 load/store optimizer renames a call's swiftself register (x20 → x22)

  crashtriage needed
  Bug

  swiftlang/swift#93360 · Filter by author eugenijusr opened on Oct 16, 2026

• miscompile on Array.insert of zero-sized value via copying through a pointer that reads 1 byte from an undefined address

  triage needed
  Bug

  swiftlang/swift#93344 · Filter by author tayloraswift opened on Oct 15, 2026

• [Windows] Optimize the toolchain's build for faster PR testing

  swiftlang/swift#93330 · Filter by author charles-zablit opened on Oct 15, 2026
  2

  

• [cxx-interop] Undefined std::function copy constructor when a lambda captures a std::function

  swiftlang/swift#93328 · Filter by author mrousavy opened on Oct 15, 2026

• Android SDK: lib_FoundationICU.so and the Swift runtime export C++ runtime symbols

  Androidbuild
  swiftlang/swift#93320 · Filter by author niktishakov opened on Oct 15, 2026
  5