Issues

• [Swift 6.4] PerformanceSILLinker crashes deserializing CGSize helper without explicit CoreGraphics import

  swiftlang/swift#93622 · Filter by author csinz opened on Oct 25, 2026

• [cxx-interop] returnDirect/passDirect stubs copy past the storage of small Swift structs

  swiftlang/swift#93614 · Filter by author pinpong opened on Oct 24, 2026

• @export(implementation) on a stored property of a library-evolution struct produces invalid SIL

  crashtriage needed
  Bug

  swiftlang/swift#93610 · Filter by author rintaro opened on Oct 23, 2026

• Key paths to an @export(implementation) property are not equal when formed in different modules

  triage needed
  Bug

  swiftlang/swift#93609 · Filter by author rintaro opened on Oct 23, 2026

• Imported Clang records with array or block reference fields use POD value witnesses

  swiftlang/swift#93605 · Filter by author AdamCmiel opened on Oct 23, 2026

• ThreadSanitizer SEGV in __tsan::MemoryAccess in single-threaded @inlinable generic code specialized into a test bundle (Xcode 26.6 and 27)

  swiftlang/swift#93589 · Filter by author waliid opened on Oct 23, 2026

• [AutoDiff] Incorrect derivative when differentiating through a function with a non-prefix subset of active parameters

  AutoDiff
  Bug

  swiftlang/swift#93583 · Filter by author kovdan01 opened on Oct 23, 2026
  1

• withTaskCancellationShield strongly links swift_task_cancellationShieldPush/Pop, crashing at launch below macOS 27 despite #available

  swiftlang/swift#93579 · Filter by author taher-mosbah opened on Oct 23, 2026
  1

• Missed throw support

  AutoDiffcrash
  Bug

  swiftlang/swift#93576 · Filter by author asl opened on Oct 23, 2026
  

• Unexpected Error When Using KeyPath as Function Inputting an Existential

  compilerembeddedexpressionskey pathstype checker
  Bug

  swiftlang/swift#93575 · Filter by author filip-sakel opened on Oct 23, 2026

• Assertion failure in EarlyRedundantLoadElimination while optimizing

  SILOptimizer
  Bug

  swiftlang/swift#93570 · Filter by author glessard opened on Oct 22, 2026

• Enable lock-free and allocation-free backtrace capturing

  triage needed
  Feature

  swiftlang/swift#93548 · Filter by author FranzBusch opened on Oct 22, 2026
  4

  

• Embedded Swift does not define String.init(reflecting:)

  bugCustomDebugStringConvertiblereflectionString
  Bug

  swiftlang/swift#93531 · Filter by author grynspan opened on Oct 21, 2026

• [debuginfo] Bound generic class DIE missing from .debug_names

  debug infoDWARFtriage needed
  Bug

  swiftlang/swift#93529 · Filter by author duow310 opened on Oct 21, 2026
  

• [Windows] [Backtracing] UI programs seem to exit on crash without invoking backtracer

  triage neededWindows
  Bug

  swiftlang/swift#93526 · Filter by author carlpeto opened on Oct 21, 2026

• RequirementMachine::verify "Term verification failed" in SILGen for an initializer pinning a ~Copyable parameter to a nested generic conditional conformer (protocol with primary associated types refining another protocol)

  genericsnoncopyable struct/enum
  swiftlang/swift#93525 · Filter by author coenttb opened on Oct 21, 2026
  

• std::vector should conform to CxxVector on Android armv7

  c++ interopcrash
  Bug

  swiftlang/swift#93524 · Filter by author susmonteiro opened on Oct 21, 2026
  

• [Windows] ~250 MSVC warnings from 4 locations (C4250, C4018)

  Windows
  swiftlang/swift#93515 · Filter by author charles-zablit opened on Oct 21, 2026
  

• [Windows] ~560 MSVC C4715 "not all control paths return a value" warnings

  Windows
  swiftlang/swift#93514 · Filter by author charles-zablit opened on Oct 21, 2026
  

• [Windows] ~400 "attribute declaration must precede definition" warnings on llvm/ADT/StringRef.h:30

  Windows
  swiftlang/swift#93513 · Filter by author charles-zablit opened on Oct 21, 2026
  

• [Windows] precompiled header reuse with different defines causes ~5,200 -Wclang-cl-pch warnings

  Windows
  swiftlang/swift#93512 · Filter by author charles-zablit opened on Oct 21, 2026
  2

  

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

  Windows
  swiftlang/swift#93501 · Filter by author charles-zablit opened on Oct 21, 2026
  1

  

• 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

• .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