Repository Issue Activity (beta)

#89920 Tautological error when attempting to use unapplied reference to method in property initializer

#90280 [Swift 6.4 regression] Init accessor fails to parse when property has an initial value

#90275 Crash while running pass SILModuleTransform “MandatoryAllocBoxToStack"

#89151 [Swift][Macros] Assertion isConcrete() in ProtocolConformanceRef::getConcrete when expanding @attached member macro on a subclass whose superclass has the same macro applied and the macro plugin is missing

#90305 Crash when accessing the isolation property of an @isolated(any) function-type under very specific circumstances

#83229 Accessing isolation of `sending @escaping @isolated(any)` parameter crashes compiler

#90417 Redundant Span/MutableSpan bounds check not eliminated at -Osize

#90414 Incorrect compiler output with optimizations - compile-time constant array or dictionary of C structs with a nested struct initialized wrong (see description for exact requirements)

#90271 [Sema] A statically isolated @Sendable closure can lose its isolation when converted to a synchronous function, causing data races

#86074 @TaskLocal macro does not carry isolation into synthesized property

#90408 [6.4] Compiler crash (ownership verification) in CopyPropagation with -O — regression from 6.3

#90405 Libraries with Swift dependencies should be rebuilt on the toolchain being built (on OpenBSD only?)

#90407 RegexBuilder infinite loop when nullable capture starts with NegativeLookahead

#90406 Compiler crash when a type conforms to a protocol from another module that has a @_borrowed requirement defaulted in a protocol extension (also triggered by refining Collection)

#89028 IRGen crash in `emitArchetypeWitnessTableRef` with `~Copyable` generic parameter in same-type constraint (pre-macOS 15 deployment targets)

#90362 Building SwiftPM using the Swift bootstrap scripts uncleanly isolates libraries between iterations of the Swift compiler

#88454 [Swift] Assertion "Expected type to have been set!" in ConstraintSystem::getType when type-checking a call through a function-value binding that shadows an overloaded @preconcurrency @MainActor function

#56301 [SR-13903] Make `ApplyInst` a `MultipleValueInstruction`

#90385 Swift 6.3.3 release optimizer crashes in synthesized deinit with defaultIsolation(MainActor.self)

#90380 Explicit modules + Compilation Caching miscompiles an imported C `static inline` atomic to LSE (LDADD) on an iOS 16 deployment target

#90377 Miscompile at -O: `_read` accessor that recursively yields the result of another `_read` accessor

#90373 swift-frontend crash under -cross-module-optimization (SwiftUI ViewModifier)

#90031 Program crash when trying to print property of optional

#90370 Frontend crash (signal 6, "SmallVector unable to grow"): iterating Observations with a @MainActor closure from a nonisolated @Sendable closure

#89851 `EarlyPerfInliner` infinite loop crash on synthesized `deinit` of generic `UIViewRepresentable` `Coordinator` holding `UIHostingController<Content>` at -O