72 Pull requests merged by 28 people

• [stdlib, 6.2] fix availability of Span.bytes

  #83438 merged Aug 22, 2025

• 🍒 [demangling] make printGenericSignature virtual

  #83845 merged Aug 22, 2025

• [6.2][build] Make it possible to build a cross-compilation toolchain for Android, including Testing

  #83503 merged Aug 22, 2025

• [6.2] Embedded Wasm: enable import WASILibc

  #83846 merged Aug 22, 2025

• 🍒[cxx-interop] Enable reference-counted types on Windows

  #83844 merged Aug 21, 2025

• CMake: readd StringProcessing dependency to StdlibUnittest

  #83838 merged Aug 21, 2025

• build.ps1: stage the experimental SDK runtime

  #83839 merged Aug 21, 2025

• Add and enable another large diffing benchmark

  #83832 merged Aug 21, 2025

• [demangling] make printGenericSignature virtual

  #83375 merged Aug 21, 2025

• [cxx-interop] Import constexpr globals in a namespace

  #83825 merged Aug 21, 2025

• [cxx-interop] Enable reference-counted types on Windows

  #83802 merged Aug 21, 2025

• 🍒[cxx-interop] Validate C foreign reference types

  #83810 merged Aug 21, 2025

• [6.2][AST/Sema] SE-0487: Implement @nonexhaustive attribute and new enum exhaustivity checking rule

  #82922 merged Aug 21, 2025

• Mark a UTF8Span test unavailable on watchOS.

  #83821 merged Aug 21, 2025

• AST: Allow substitution limits >= 32767 and increase limit

  #83834 merged Aug 21, 2025

• build.ps1: add CMAKE_NINJA_FORCE_RESPONSE_FILE

  #83831 merged Aug 20, 2025

• [NFC] Renamed three SIL utilities.

  #83789 merged Aug 20, 2025

• IRGen: Use C compatible representation for @cdecl enums

  #83814 merged Aug 20, 2025

• [Caching] Fix typecheck swiftinterface with prefix map

  #83816 merged Aug 20, 2025

• [AST] SE-0487: Promote NonexhaustiveAttribute to a language feature

  #83823 merged Aug 20, 2025

• [cxx-interop] Do not import partial specializations of variables

  #83813 merged Aug 20, 2025

• Remove diag::type_of_expression_is_ambiguous

  #83803 merged Aug 20, 2025

• [Embedded] Introduce a test for @_implementationOnly + @_neverEmitIntoClient

  #83820 merged Aug 20, 2025

• [test] Restrict existential test to just built runtime

  #83818 merged Aug 20, 2025

• 🍒[cxx-interop] Allow retain/release operations to return an unsigned integer

  #83815 merged Aug 20, 2025

• Promote LifetimeDependenceMutableAccessors and InoutLifetimeDependence to language features

  #83817 merged Aug 20, 2025

• Improve differentiableMap vjp performance

  #83807 merged Aug 20, 2025

• Manually merge main -> rebranch

  #83819 merged Aug 19, 2025

• [cxx-interop] Avoid ambiguous C++ overloads for functions from Swift extensions

  #83811 merged Aug 19, 2025

• 🍒[cxx-interop] Prohibit weak references to foreign reference types

  #83804 merged Aug 19, 2025

• Embedded Wasm: enable import WASILibc

  #83792 merged Aug 19, 2025

• build.ps1: intrduce the ability to build with clang optionally

  #83796 merged Aug 19, 2025

• utils: build the dynamic experimental SDK

  #83717 merged Aug 19, 2025

• [embedded] When loading (sub-)modules, propagate the Embedded flag and use it for hash computation

  #83795 merged Aug 19, 2025

• [ClangImporter] Skip importing values for ObjCBool declarations

  #83791 merged Aug 19, 2025

• [cxx-interop] Validate C foreign reference types

  #83793 merged Aug 19, 2025

• [cxx-interop] Prohibit weak references to foreign reference types

  #83787 merged Aug 19, 2025

• [Test] Disable Interpreter/typed_throws_abi.swift on back deployment …

  #83794 merged Aug 19, 2025

• AST: Allow obsoletion in Swift version to disambiguate overloads consistently

  #83799 merged Aug 19, 2025

• One final round of small cleanups for Monoids benchmark

  #83797 merged Aug 19, 2025

• [cxx-interop] Make sure we emit lifetime warnings for templated classes

  #83786 merged Aug 18, 2025

• build.ps1: improve documentation (NFC)

  #83781 merged Aug 18, 2025

• build.ps1: attempt to repair the ARM64 cross-compile

  #83783 merged Aug 18, 2025

• [cxx-interop] Make reverse interop header compile in embedded mode

  #83785 merged Aug 18, 2025

• Build WasmKit with host SwiftPM when SwiftPM is not built

  #83755 merged Aug 18, 2025

• [Dependency Scanning] Bridge Clang dependency scanner results on-demand

  #83600 merged Aug 18, 2025

• Reapply [cxx-interop] Avoid copies when accessing pointee

  #83370 merged Aug 18, 2025

• CMake: allow more private libraries to be used on older OSes

  #83730 merged Aug 18, 2025

• Add @_neverEmitIntoClient to prohibit SIL serialization for a function

  #83784 merged Aug 18, 2025

• [cxx-interop] Allow retain/release operations to return an unsigned integer

  #83753 merged Aug 18, 2025

• [cxx-interop] Import tilde operators

  #83761 merged Aug 18, 2025

• [CSOptimizer] Add support for opened existential arguments

  #83735 merged Aug 18, 2025

• Synchronization: repair the build on Windows i686

  #83732 merged Aug 18, 2025

• [Embedded] Emit weak definitions for imported symbols

  #83739 merged Aug 18, 2025

• SIL: fix miscompiles of non-Copyable struct/enum with deinits

  #83763 merged Aug 17, 2025

• LifetimeDependenceScopeFixup: extend store_borrow allocations

  #83728 merged Aug 17, 2025

• [Diagnostics] Add fix-its for missing set and ) after access modifier

  #82058 merged Aug 16, 2025

• build.ps1: organise script options

  #83758 merged Aug 16, 2025

• Sema: Remove a bunch of usages of replaceCovariantResultType()

  #83768 merged Aug 16, 2025

• Fix typo in Observations.swift

  #83650 merged Aug 16, 2025

• [stdlib] guard against deinitializing empty OutputSpan instances

  #83771 merged Aug 16, 2025

• Revert "Merge pull request #83483 from Xazax-hun/turn-off-addressable"

  #83754 merged Aug 16, 2025

• Revert "Protocol conformance cache for generic types"

  #83770 merged Aug 16, 2025

• AST: Request-ify getting the AvailabilityDomain from a ValueDecl

  #83769 merged Aug 16, 2025

• [CS] Use apply component locator for verifyThatArgumentIsHashable

  #83766 merged Aug 16, 2025

• [Dependency Scanning] Fix optional import statement serialization logic

  #83767 merged Aug 16, 2025

• [OSSACompleteLifetime] Promote assertion.

  #83756 merged Aug 16, 2025

• [test] Record whether a crasher is a stack overflow

  #83759 merged Aug 16, 2025

• [Windows] Use a multiroot data file to test (corelibs-)foundation on Windows

  #83764 merged Aug 16, 2025

• 6.2: [SIL] Fix visitAccessedAddress @ end_borrow

  #83709 merged Aug 16, 2025

• [OSSA] Fix borrowCopyOverGuaranteedUsers at dead-ends.

  #83741 merged Aug 15, 2025

• Revert "Revert "[cxx-interop] Import decls in extern blocks within namespaces""

  #83589 merged Aug 15, 2025

40 Pull requests opened by 28 people

• [stdlib, 6.2.x] guard against deinitializing empty OutputSpan instances

  #83775 opened Aug 16, 2025

• [Diags] Allow multiple in-flight diagnostics

  #83776 opened Aug 16, 2025

• [Sema] Clean up extension binding a little

  #83777 opened Aug 17, 2025

• [6.2.1][cherrypick] Plumb native-clang-tools-path to build support.

  #83778 opened Aug 17, 2025

• Add an option for symbol graph to support long module names.

  #83782 opened Aug 18, 2025

• build.ps1: introduce new debug format "dwarf-fission"

  #83798 opened Aug 18, 2025

• wasmswiftsdk.py: build the generator with the freshly built toolchain

  #83808 opened Aug 19, 2025

• [6.2.1][build] Make it possible to build a cross-compilation toolchain for Android, including Testing

  #83809 opened Aug 19, 2025

• [test] Add some more known crashers

  #83824 opened Aug 20, 2025

• [SILGen] Fix the type of closure thunks that are passed const references

  #83827 opened Aug 20, 2025

• [docs] Add instructions to build LLDB with Swift support

  #83828 opened Aug 20, 2025

• stdlib: Mark UnsafeRawBufferPointer's withContiguousStorageIfAvailable as @inline(__always)

  #83833 opened Aug 20, 2025

• Zcli/brotli 6.2

  #83836 opened Aug 20, 2025

• [IRGen] Do not set HasLayoutString flag for non-copyable types requir…

  #83837 opened Aug 20, 2025

• Restrict a few tests to run against the just built runtime

  #83840 opened Aug 20, 2025

• [Dependency Scanning] Re-enable querying Swift Overlays only for visible Clang modules

  #83841 opened Aug 20, 2025

• Sema: fix bad diagnostic for `nil + nil`

  #83848 opened Aug 21, 2025

• [cxx-interop] Pass foreign reference types with correct level of indirection

  #83850 opened Aug 21, 2025

• [StaticMirror] correctly parse the data contents of relocated section headers

  #83851 opened Aug 21, 2025

• build.ps1: add a workaround for Android build break

  #83852 opened Aug 21, 2025

• [ast] Convert swift::getBuiltinType to use a covered switch for BuiltinTypeKind

  #83853 opened Aug 21, 2025

• IRGen: Mark some `llvm::APInt` constructions as signed

  #83854 opened Aug 21, 2025

• [concurrency] NFC refactor out some code from LowerHopToActor before changing the pass.

  #83855 opened Aug 21, 2025

• [frontend] Expose via a LangOption whether or not the compiler is compiling for a triple that supports AArch64 TBI.

  #83856 opened Aug 21, 2025

• [concurrency] Make all runtime tests also run with nonisolated(nonsending) by default enabled.

  #83857 opened Aug 21, 2025

• AST: Finish removing replaceCovariantResultType()

  #83858 opened Aug 21, 2025

• Remove `swift-ast-script` sources

  #83859 opened Aug 21, 2025

• [DO NOT MERGE] check if getImportedModules matters

  #83860 opened Aug 21, 2025

• [CSSimplify] SE-0324: Use correct conversion when converting array types

  #83862 opened Aug 21, 2025

• [6.2][CSSimplify] SE-0324: Use correct conversion when converting array types

  #83863 opened Aug 21, 2025

• Sema: Simplify recording required import access levels

  #83865 opened Aug 22, 2025

• [NFC][SILOptimizer]: update outdated docs in DefiniteInit & DRY

  #83866 opened Aug 22, 2025

• Fix order of building mimalloc with `-IncludeNoAsserts`

  #83867 opened Aug 22, 2025

• [Distributed] fix target triple in lib evolution test

  #83868 opened Aug 22, 2025

• [Sema] Resolve interface type in `ExtendedTypeRequest`

  #83869 opened Aug 22, 2025

• [WIP] [CS] Open generic requirements for types with unbound + placeholder types

  #83870 opened Aug 22, 2025

• [documentation] update the WindowsBuild guide

  #83871 opened Aug 22, 2025

• Add docs for if/switch expr diagnostics

  #83872 opened Aug 22, 2025

• Document the 'module not testable' diagnostic

  #83873 opened Aug 22, 2025

• [cxx-interop] Fix an assertion for `extern "C"` blocks

  #83874 opened Aug 22, 2025

14 Issues closed by 7 people

• [6.2 Nightly] Runtime crash near `swift_getObjectType` only on macOS

  #83507 closed Aug 22, 2025

• [cxx-interop] constexpr from within a namespace is not available in Swift

  #81327 closed Aug 21, 2025

• Metadata for C++ foreign reference types on Windows isn't emitted

  #82643 closed Aug 21, 2025

• @cdecl enum should have the same layout as its raw representation

  #83738 closed Aug 20, 2025

• [cxx-interop] Partially specialized globals should not get imported

  #80802 closed Aug 20, 2025

• False positive data races in TSAN with task cancellation handler onCancel

  #59068 closed Aug 19, 2025

• `import WASILibc` is unavailable in Embedded Swift for WASI

  #83513 closed Aug 19, 2025

• Assigning a non-nil value to a weak SWIFT_SHARED_REFERENCE variable crashes at runtime

  #83080 closed Aug 19, 2025

• `Result.init(catching:)` doesn't infer typed throw but instead falls back to `any Error`

  #80193 closed Aug 18, 2025

• Poor type inference with typed throws

  #78639 closed Aug 18, 2025

• Nesting a closure with typed throws erases error type

  #78880 closed Aug 18, 2025

• Overloaded bitwise negation operator (~) on C++ class not imported

  #83740 closed Aug 18, 2025

• should async let closure literals always return sending?

  #76744 closed Aug 16, 2025

• 6.2.0 branch is invalid

  #83733 closed Aug 15, 2025

21 Issues opened by 18 people

• mismatched branches in switch expressions with > 2 cases could be diagnosed better

  #83864 opened Aug 22, 2025

• Invalid "clangDC->getRedeclContext()->isTranslationUnit() && non-top-level Clang types not supported yet"

  #83861 opened Aug 21, 2025

• Rebranch: Assertion failed for Windows x86 target SDK

  #83849 opened Aug 21, 2025

• Bad diagnostic for deinit in non-copyable type extension

  #83847 opened Aug 21, 2025

• Crash when using variadic arguments based on Sequence protocol

  #83843 opened Aug 21, 2025

• Swift 6.2 Type inference regression with variadic generics within `if let`

  #83835 opened Aug 20, 2025

• eval a unaviable var causing lldb crash

  #83829 opened Aug 20, 2025

• Using `do throws()` with custom error protocol causes crash

  #83826 opened Aug 20, 2025

• My watchOS app

  #83822 opened Aug 20, 2025

• Nonisolated nonsending closure called from nonisolated nonsending function does not inherit caller actor

  #83812 opened Aug 19, 2025

• Nested tuple fails to perform label conversion in ternary expression

  #83806 opened Aug 19, 2025

• std::function that uses reference type leads to bus error on runtime

  #83805 opened Aug 19, 2025

• [cxx-interop] Passing an `std::optional<std::string>` from C++ to Swift causes a compiler crash only in Release builds

  #83801 opened Aug 19, 2025

• `@concurrent` main function runs on main actor

  #83790 opened Aug 18, 2025

• Xcode 26 beta 5 or 6 crash build on release: assertion failed isConcrete

  #83788 opened Aug 18, 2025

• Cannot assign self inside ~Copyable struct initializer under certain circumstances

  #83780 opened Aug 17, 2025

• Cannot call mutating func from ~Copyable struct initializer when struct has a let member

  #83779 opened Aug 17, 2025

• Undefined stack behavior w/ `InlineArray`: `InlineArray<16, UInt8>` contents change after a trivial copy

  #83774 opened Aug 16, 2025

• Typed throws widened to any Error when calling protocol requirement through existential inside closure

  #83773 opened Aug 16, 2025

• Remove `-whole-module-optimization` workaround in Synchronization

  #83765 opened Aug 15, 2025

• SPM crashes when building Foundation tests

  #83762 opened Aug 15, 2025

68 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• New SIL Loop Invariant Code Motion pass

  #83512 commented on Aug 22, 2025 • 39 new comments

• Reimplement floating-point description implementation in Swift.

  #82750 commented on Aug 20, 2025 • 11 new comments

• Diagnose unannotated C++ APIs returning SWIFT_SHARED_REFERENCE at Swift call sites

  #83025 commented on Aug 22, 2025 • 7 new comments

• [Concurrency] Updates after second SE pitch.

  #82456 commented on Aug 22, 2025 • 1 new comment

• Add a `_swift_willAbort` hook

  #83674 commented on Aug 20, 2025 • 1 new comment

• [IDE] Add full documentation to code completion result

  #82464 commented on Aug 18, 2025 • 1 new comment

• ComputeSideEffects: compute properties even if function has an effect attribute

  #83665 commented on Aug 22, 2025 • 1 new comment

• [concurrency] Change #isolated to mask out the TBI bits of the witness pointer of the implicit isolated any Actor pointer so we can do optimizations on TBI supporting platforms in the future.

  #83346 commented on Aug 21, 2025 • 0 new comments

• draft: Improve map performance through unsafe uninitialized capacity

  #83297 commented on Aug 19, 2025 • 0 new comments

• Remove some obsolete properties from the macOS ToolchainInfo.plist

  #83274 commented on Aug 19, 2025 • 0 new comments

• Fix the Swift for macOS installer to encode a minimum OS version for installation

  #83273 commented on Aug 20, 2025 • 0 new comments

• [stdlib] Switch to a linear-space variant of Myers diffing

  #83212 commented on Aug 22, 2025 • 0 new comments

• [stdlib] Handle arguments with alignment larger than a word in KeyPath

  #83161 commented on Aug 19, 2025 • 0 new comments

• [6.2] Cherry-pick SE-0481 with source-incompatible changes to closure capture semantics still wrapped into a feature

  #82930 commented on Aug 22, 2025 • 0 new comments

• [cxx-interop] Test `std::optional` with AddressableParameters

  #82809 commented on Aug 19, 2025 • 0 new comments

• [6.2][cherrypick] Plumb native-clang-tools-path to build support.

  #82768 commented on Aug 17, 2025 • 0 new comments

• [DNM] Add more detailed logging for corelibs foundation

  #82755 commented on Aug 22, 2025 • 0 new comments

• 6.2: Bump WasmKit in `update-checkout-config.json` to 0.1.6

  #81342 commented on Aug 20, 2025 • 0 new comments

• [DNM] Rebranch testing

  #81190 commented on Aug 16, 2025 • 0 new comments

• [wasm] Update wasi-libc to version 27

  #83360 commented on Aug 17, 2025 • 0 new comments

• [IDE] [Signature Help] Add basic signature help request to SourceKit

  #83378 commented on Aug 22, 2025 • 0 new comments

• Add brotli support to FoundationNetworking

  #83441 commented on Aug 19, 2025 • 0 new comments

• [Parse] Ignore '(' on newline after attribute names

  #83497 commented on Aug 20, 2025 • 0 new comments

• [RemoteInspection] Handle special case of large amount of ELF sections.

  #83582 commented on Aug 19, 2025 • 0 new comments

• [windows] move windows-llvm-lit-test-overrides.txt to the llvm-project repository

  #83588 commented on Aug 22, 2025 • 0 new comments

• [windows] upgrade to Python 3.10.1

  #83615 commented on Aug 20, 2025 • 0 new comments

• [ConstraintSystem] Adjust `isArgumentOfImportedDecl` to handle synthesized declarations

  #83620 commented on Aug 18, 2025 • 0 new comments

• [IDE] [Signature Help] Extract primitive `CodeCompletionString` creation into `CodeCompletionStringBuilder`

  #83646 commented on Aug 16, 2025 • 0 new comments

• [IDE] Erase archetypes without declaration generic signature

  #83652 commented on Aug 16, 2025 • 0 new comments

• [stdlib, SE-0485] Array functions with OutputSpan

  #83657 commented on Aug 19, 2025 • 0 new comments

• build: Install dispatch libraries in arch subdir

  #83666 commented on Aug 19, 2025 • 0 new comments

• [cxx-interop] Copy lazily bridged Cocoa strings correctly without hanging

  #83701 commented on Aug 20, 2025 • 0 new comments

• Allow value generics within the stdlib

  #83710 commented on Aug 19, 2025 • 0 new comments

• [cxx-interop] Allow many specializations of a class template

  #83751 commented on Aug 18, 2025 • 0 new comments

• Having code that casts a generic any RangeExpression<T> will cause app to instantly crash at startup, on iOS 15 devices.

  #64657 commented on Aug 20, 2025 • 0 new comments

• Xcode 26 beta 4 crash

  #83528 commented on Aug 19, 2025 • 0 new comments

• Builds often timeout due to no console output activity

  #83329 commented on Aug 19, 2025 • 0 new comments

• Crash in Swift 6.1 when using async let inside a do {} block (Xcode 16.3+)

  #81771 commented on Aug 19, 2025 • 0 new comments

• PeerMacro on Protocol causes EXC_BAD_ACCESS during runtime

  #81068 commented on Aug 19, 2025 • 0 new comments

• Compiler crash regression in 6.1

  #80269 commented on Aug 19, 2025 • 0 new comments

• IRGenDebugInfo.cpp: Assertion failed: (OffsetInBits + SizeInBits <= getSizeInBits(Var) && "pars > totum"), in emitVariableDeclaration

  #83734 commented on Aug 18, 2025 • 0 new comments

• Compiler Crash for 6.1 and 6.1.2. only on CI

  #83637 commented on Aug 18, 2025 • 0 new comments

• Invalid "Classes cannot have non-final generic functions in embedded Swift" error

  #78150 commented on Aug 18, 2025 • 0 new comments

• [6.2]: possible ownership diagnostic regression for escaping values of consuming parameters

  #83584 commented on Aug 18, 2025 • 0 new comments

• Invalid conformance in type-checked AST

  #82722 commented on Aug 18, 2025 • 0 new comments

• Closure injection (in struct initializer with MainActor beyond module) make compiler crash

  #82181 commented on Aug 18, 2025 • 0 new comments

• Wrong compiler error "Closure captures variable before it is declared"

  #83628 commented on Aug 17, 2025 • 0 new comments

• OpenBSD port tracking

  #78437 commented on Aug 17, 2025 • 0 new comments

• Revert `-j 1` change in build.ps1 for foundation tests

  #83606 commented on Aug 16, 2025 • 0 new comments

• Type checker doesn't complain when adding untyped arrays

  #83706 commented on Aug 16, 2025 • 0 new comments

• Build `Observation` in Embedded mode

  #77146 commented on Aug 15, 2025 • 0 new comments

• Fix two issues related with emission of differentiability witnesses

  #80983 commented on Aug 21, 2025 • 0 new comments

• Bump WasmKit in `update-checkout-config.json` to 0.1.6

  #80820 commented on Aug 20, 2025 • 0 new comments

• DNM - toolchain testing

  #79684 commented on Aug 18, 2025 • 0 new comments

• Support differentiation of wrapped value modify accessors

  #78794 commented on Aug 18, 2025 • 0 new comments

• [Sema]: diagnose implicit strong captures of weak capture list entries

  #77063 commented on Aug 19, 2025 • 0 new comments

• [DNM] 🍁 Dummy commit for toolchain build

  #76034 commented on Aug 22, 2025 • 0 new comments

• Fixing ARM64 return registers in CallConvSummary.rst

  #71008 commented on Aug 21, 2025 • 0 new comments

• DNM: toolchain build

  #65907 commented on Aug 20, 2025 • 0 new comments

• An optimal algorithm for bounded random integers

  #39143 commented on Aug 20, 2025 • 0 new comments

• Implement experimental module selectors (MyMod::someName) feature

  #34556 commented on Aug 21, 2025 • 0 new comments

• Type inference breaking with generic typed throws and autoclosures

  #75430 commented on Aug 22, 2025 • 0 new comments

• [SR-2183] Swift icon is a swallow not a swift

  #44791 commented on Aug 22, 2025 • 0 new comments

• Missing fixits for missing @dynamicMemberLookup impl

  #83344 commented on Aug 22, 2025 • 0 new comments

• swiftc dump ast without any swiftc logging

  #83660 commented on Aug 22, 2025 • 0 new comments

• Swift 6.2 regression for resultbuilders with Parameter packs

  #83195 commented on Aug 22, 2025 • 0 new comments

• Bad diagnostic for `nil + nil`

  #83661 commented on Aug 21, 2025 • 0 new comments

• [SR-4429] Linux: segfault when storing @convention(block) functions

  #47006 commented on Aug 21, 2025 • 0 new comments