Issues · swiftlang/swift

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Reading a Mutex-stored closure at -Onone accumulates reabstraction thunks until the stack overflows

Status: Open.

#91348 In swiftlang/swift;

· Nimita311 opened

on Aug 9, 2026

MutableRef crashes compiler

crashBug: A crash, i.e., an abnormal termination of software

triage neededThis issue needs more specific labels

Status: Open.

#91347 In swiftlang/swift;

· wade-tregaskis opened

on Aug 9, 2026

Standard library fails to build on Ubuntu 26.04 LTS with assertions turned on.

Status: Open.

#91345 In swiftlang/swift;

· jirid opened

on Aug 9, 2026

[SILGen] Compiler crash with Ref, UniqueBox, and optional chaining on a noncopyable type

crashBug: A crash, i.e., an abnormal termination of software

triage neededThis issue needs more specific labels

Status: Open.

#91344 In swiftlang/swift;

· teamhimeh opened

on Aug 9, 2026

[SILOptimizer] EarlyPerfInliner asserts mdi.isNonEscaping() in optimized main-nightly build

Status: Open.

#91342 In swiftlang/swift;

· coenttb opened

on Aug 8, 2026

SIL ownership verification failure in CopyPropagation: "Found a leaked owned value that was never consumed" on macro-generated getter (Swift 6.4, -c release)

Status: Open.

#91327 In swiftlang/swift;

· zakievvv opened

on Aug 7, 2026

Code coverage: no instrumentation is emitted for functions generated by attached macros

code coverageArea → IDE support: code coverage

compilerThe Swift compiler itself

macro expansionsFeature → expressions: Macro expansion expressions

Status: Open.

#91304 In swiftlang/swift;

· sisoje opened

on Aug 6, 2026

Swift/C++ Parser Mismatch With Module Selector and Wildcard Type

triage neededThis issue needs more specific labels

Status: Open.

#91298 In swiftlang/swift;

· filip-sakel opened

on Aug 6, 2026

Composite protocol with SendableMetatype does not suppress isolated conformance warning

triage neededThis issue needs more specific labels

Status: Open.

#91287 In swiftlang/swift;

· mattmassicotte opened

on Aug 6, 2026

[6.3 regression][-Onone] LoadableByAddress reg2mem forwards an indirect enum's box address past the box's release - `switch` with a wildcard payload binding reads freed memory

triage neededThis issue needs more specific labels

Status: Open.

#91283 In swiftlang/swift;

· vakhidbetrakhmadov opened

on Aug 6, 2026

Static member lookup in generic context does not provide autocomplete for extension macro declared instances

triage neededThis issue needs more specific labels

Status: Open.

#91260 In swiftlang/swift;

· atifdev10 opened

on Aug 5, 2026

Invalid Error When Using Anonymous Closure Argument Only Inside `defer`

triage neededThis issue needs more specific labels

Status: Open.

#91227 In swiftlang/swift;

· filip-sakel opened

on Aug 4, 2026