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Unnecessary retain/release pair around closure

ARCFeature: automatic reference countingFeature: automatic reference counting

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

expressionsFeature: expressionsFeature: expressions

performance

SILOptimizerArea → compiler: SIL optimization passesArea → compiler: SIL optimization passes

swift 6.2

Status: Open.

Bug

#82155 In swiftlang/swift;

· eeckstein opened on Jun 10, 2025

Inconsistent isolation of top-level closure

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

closuresFeature: closuresFeature: closures

concurrencyFeature: umbrella label for concurrency language featuresFeature: umbrella label for concurrency language features

triage neededThis issue needs more specific labelsThis issue needs more specific labels

Status: Open.

#81599 In swiftlang/swift;

· sutaner opened on May 19, 2025

Trailing closures are wrongly accepted for enum-case-patterns

accepts invalidBug: Accepts invalidBug: Accepts invalid

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

enum case patternsFeature → patterns: Enumeration case patternsFeature → patterns: Enumeration case patterns

patternsFeature: patternsFeature: patterns

swift 6.2

type checkerArea → compiler: Semantic analysisArea → compiler: Semantic analysis

Status: Open.

#79047 In swiftlang/swift;

· rintaro opened on Jan 30, 2025

Error <code>type 'any P' cannot conform to 'P'</code> fixed by unrelated statement

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

existentialsFeature: values of types like `any Collection`, `Any` and `AnyObject`; type-erased valuesFeature: values of types like `any Collection`, `Any` and `AnyObject`; type-erased values

expressionsFeature: expressionsFeature: expressions

genericsFeature: generic declarations and typesFeature: generic declarations and types

implicit existential openingFeature → existentials: implicit opening of existentials when passed to parameters of generic typeFeature → existentials: implicit opening of existentials when passed to parameters of generic type

swift 6.1

type checkerArea → compiler: Semantic analysisArea → compiler: Semantic analysis

Status: Open.

#78436 In swiftlang/swift;

· SimplyDanny opened on Jan 4, 2025

Closure parameter type cannot be inferred when contextual type is pack expansion

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

expressionsFeature: expressionsFeature: expressions

genericsFeature: generic declarations and typesFeature: generic declarations and types

parameter packsFeature → generics: Parameter packsFeature → generics: Parameter packs

swift 6.2

type checkerArea → compiler: Semantic analysisArea → compiler: Semantic analysis

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#78426 In swiftlang/swift;

· AnthonyLatsis opened on Jan 3, 2025

Swift Compiler crashes when using a weak self inside a callback

accepts invalidBug: Accepts invalidBug: Accepts invalid

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

c interopFeature: Interoperability with CFeature: Interoperability with C

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

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

expressionsFeature: expressionsFeature: expressions

SIL

swift 6.0

Status: Open.

#78366 In swiftlang/swift;

· tapthaker opened on Dec 26, 2024

ClosureLifetimeFixup inhibits optimizations

closuresFeature: closuresFeature: closures

run-time performance

SILOptimizerArea → compiler: SIL optimization passesArea → compiler: SIL optimization passes

Status: Open.

#77651 In swiftlang/swift;

· asl opened on Nov 15, 2024

This complicated combination of trailing closures and autoclosures crashes the Swift compiler

assertion failureBug → crash: An assertion failureBug → crash: An assertion failure

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

call expressionsFeature → expressions: Call expressionsFeature → expressions: Call expressions

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

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

expressionsFeature: expressionsFeature: expressions

regression

swift 6.0

trailing closuresFeature: trailing closuresFeature: trailing closures

type checkerArea → compiler: Semantic analysisArea → compiler: Semantic analysis

Status: Open.

#74645 In swiftlang/swift;

· schuelermine opened on Jun 22, 2024

Variadic generics cause crash in UsePrespecialized pass

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

genericsFeature: generic declarations and typesFeature: generic declarations and types

implicit conversionsFeature: implicit conversionsFeature: implicit conversions

parameter packsFeature → generics: Parameter packsFeature → generics: Parameter packs

swift 6.0

tuplesFeature: tuplesFeature: tuples

type checkerArea → compiler: Semantic analysisArea → compiler: Semantic analysis

typesFeature: typesFeature: types

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#73660 In swiftlang/swift;

· JadenGeller opened on May 16, 2024

Show a closure’s type and actor isolation when performing cursor info on the braces or <code>in</code> keyword

actor isolationFeature → concurrency: Actor isolationFeature → concurrency: Actor isolation

attributesFeature: Declaration and type attributesFeature: Declaration and type attributes

closuresFeature: closuresFeature: closures

concurrencyFeature: umbrella label for concurrency language featuresFeature: umbrella label for concurrency language features

cursor infoArea → source tooling: cursor infoArea → source tooling: cursor info

featureA feature request or implementationA feature request or implementation

source toolingArea: IDE support, SourceKit, and other source toolingArea: IDE support, SourceKit, and other source tooling

SourceKitArea → source tooling: SourceKitArea → source tooling: SourceKit

typesFeature: typesFeature: types

Status: Open.

#73095 In swiftlang/swift;

· ahoppen opened on Apr 17, 2024

[ParameterPacks] Assertion failed: (isa&lt;To&gt;(Val) &amp;&amp; "cast&lt;Ty&gt;() argument of incompatible type!"), function cast, file Casting.h, line 578.

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

expressionsFeature: expressionsFeature: expressions

genericsFeature: generic declarations and typesFeature: generic declarations and types

parameter packsFeature → generics: Parameter packsFeature → generics: Parameter packs

swift 6.0

type checkerArea → compiler: Semantic analysisArea → compiler: Semantic analysis

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#71258 In swiftlang/swift;

· vanvoorden opened on Jan 30, 2024

[AutoDiff] Assertion failure: (!isInvalid()) in function getRequirement.

assertion failureBug → crash: An assertion failureBug → crash: An assertion failure

AutoDiff

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

conformancesFeature → protocol: protocol conformancesFeature → protocol: protocol conformances

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

expressionsFeature: expressionsFeature: expressions

genericsFeature: generic declarations and typesFeature: generic declarations and types

IRGenLLVM IR generationLLVM IR generation

multiple filesFlag: An issue whose reproduction requires multiple filesFlag: An issue whose reproduction requires multiple files

optimized onlyFlag: An issue whose reproduction requires optimized compilationFlag: An issue whose reproduction requires optimized compilation

swift 6.0

Status: Open.

#70834 In swiftlang/swift;

· fibrechannelscsi opened on Jan 11, 2024