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Parameter type cannot be inferred from contextual type in pack expansion on a closure associated with a result builder

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

compilerThe Swift compiler itselfThe Swift compiler itself

expressionsFeature: expressionsFeature: expressions

result buildersFeature: Result buildersFeature: Result builders

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

variadic parametersFeature → declarations → function parameters: Variadic function parametersFeature → declarations → function parameters: Variadic function parameters

Status: Open.

#82246 In swiftlang/swift;

· ccerino-adobe opened on Jun 13, 2025

Typechecker does not propagate effects correctly on Windows

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

compilerThe Swift compiler itselfThe Swift compiler itself

expressionsFeature: expressionsFeature: expressions

throws & rethrowsFeature → error handling: throws & rethrowsFeature → error handling: throws & rethrows

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

Status: Open.

#82236 In swiftlang/swift;

· jmschonfeld opened on Jun 13, 2025

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

Swift 6.2: undesired "Capture of non-sendable type 'T.Type'" warnings

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

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

expressionsFeature: expressionsFeature: expressions

SendableArea → standard library: The Sendable protocolArea → standard library: The Sendable protocol

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

Status: Open.

#82116 In swiftlang/swift;

· groue opened on Jun 9, 2025

Bad diagnostic for <code>.init</code> + argument label mismatch + overloads

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

expressionsFeature: expressionsFeature: expressions

overload resolutionArea → compiler → type checker: Overload resolution (ranking)Area → compiler → type checker: Overload resolution (ranking)

swift 6.2

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

Status: Open.

Bug

#81778 In swiftlang/swift;

· AnthonyLatsis opened on May 26, 2025

Failed to produce diagnostic for expression with misplaced '?'

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

expressionsFeature: expressionsFeature: expressions

failed to produce diagnosticBug → internal error: Failed to produce diagnostic for expressionBug → internal error: Failed to produce diagnostic for expression

swift 6.2

SwiftUIFlag: Involves SwiftUIFlag: Involves SwiftUI

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

Status: Open.

Bug

#81710 In swiftlang/swift;

· Zim999 opened on May 22, 2025

No fix-it for <code>RawRepresentable</code> type initializer call with argument of the same type

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

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

expressionsFeature: expressionsFeature: expressions

fix-itsFeature: diagnostic fix-itsFeature: diagnostic fix-its

RawRepresentableArea → standard library: The RawRepresentable protocolArea → standard library: The RawRepresentable protocol

swift 6.2

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

Status: Open.

Bug

#81315 In swiftlang/swift;

· AnthonyLatsis opened on May 6, 2025

Wrong expected argument type in diagnostic

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

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

expressionsFeature: expressionsFeature: expressions

swift 6.2

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

Status: Open.

Bug

#81309 In swiftlang/swift;

· AnthonyLatsis opened on May 5, 2025

No fix-it for mutation of function parameter

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

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

expressionsFeature: expressionsFeature: expressions

fix-itsFeature: diagnostic fix-itsFeature: diagnostic fix-its

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

mutabilityFeature: storage mutabilityFeature: storage mutability

swift 6.2

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

Status: Open.

Bug

#81308 In swiftlang/swift;

· AnthonyLatsis opened on May 5, 2025

No fix-it for integer literal to <code>OptionSet</code> conversion

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

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

expressionsFeature: expressionsFeature: expressions

fix-itsFeature: diagnostic fix-itsFeature: diagnostic fix-its

integer literalsFeature → literals: Integer literalsFeature → literals: Integer literals

literalsFeature → expressions: Literals such as an integer or string literalFeature → expressions: Literals such as an integer or string literal

OptionSetArea → standard library: The `OptionSet` protocolArea → standard library: The `OptionSet` protocol

swift 6.2

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

Status: Open.

Bug

#81305 In swiftlang/swift;

· AnthonyLatsis opened on May 5, 2025

Combination of <code>~Copyable</code> + optional chaining + assignment crashes the compiler.

assignmentsFeature → expressions: assignmentsFeature → expressions: assignments

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

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

noncopyable struct/enumFeature → declarations: Noncopyable value type declarationsFeature → declarations: Noncopyable value type declarations

optional chainingFeature → expressions: optional chainingFeature → expressions: optional chaining

Status: Open.

#80261 In swiftlang/swift;

· YOCKOW opened on Mar 25, 2025

Large-ish literal array of Ints consumes 100GB of memory to compile, crashes system

array literalsFeature → expressions → literals: Array literalsFeature → expressions → literals: Array literals

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

compilerThe Swift compiler itselfThe Swift compiler itself

expressionsFeature: expressionsFeature: expressions

literalsFeature → expressions: Literals such as an integer or string literalFeature → expressions: Literals such as an integer or string literal

performance

swift 6.2

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

Status: Open.

#79481 In swiftlang/swift;

· GarthSnyder opened on Feb 19, 2025