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Compiler crash (regression) relating to typed throws and primary associated types

async & awaitFeature → concurrency: asynchronous function aka the async/await patternFeature → concurrency: asynchronous function aka the async/await pattern

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

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

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

error handling

IRGenLLVM IR generationLLVM IR generation

swift 6.1

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

Bug

#80732 In swiftlang/swift;

· lawrence-forooghian opened on Apr 10, 2025

Overload resolution prefers <code>rethrows</code> to typed <code>throws</code>

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

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#80670 In swiftlang/swift;

· benrimmington opened on Apr 9, 2025

Poor type inference with typed throws

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

error handling

genericsFeature: generic declarations and typesFeature: generic declarations and types

swift 6.2

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

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

type inferenceFeature: type inferenceFeature: type inference

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

Bug

#78639 In swiftlang/swift;

· karwa opened on Jan 14, 2025

Compiler crash building Swift Testing branch that adopts typed throws

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

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

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#76930 In swiftlang/swift;

· grynspan opened on Oct 9, 2024

Type inference breaking with generic typed throws and autoclosures

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

expressionsFeature: expressionsFeature: expressions

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

type inferenceFeature: type inferenceFeature: type inference

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#75430 In swiftlang/swift;

· ZevEisenberg opened on Jul 23, 2024

AsyncSequence async extension function with do/catch block

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

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

error handling

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#74726 In swiftlang/swift;

· itaya-google opened on Jun 26, 2024

[TypedThrow] Generic Failure Protocol Crashes

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

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#74565 In swiftlang/swift;

· pbk20191 opened on Jun 20, 2024

Swift 6 typed-throws unable to detect exhaustive catch statements

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

error handling

swift 6.2

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

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#74555 In swiftlang/swift;

· NachoSoto opened on Jun 19, 2024

Bad diagnostics with multiple typed throws

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#74554 In swiftlang/swift;

· NachoSoto opened on Jun 19, 2024

Compilation fails when passing error-specified throwable closure that throws expected type error

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#74460 In swiftlang/swift;

· Vladlex opened on Jun 16, 2024

Generic typed errors cannot be used without appearing outside the "<code>throws</code> argument".

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#74383 In swiftlang/swift;

· JessyCatterwaul opened on Jun 13, 2024

Swift 6 runtime/Compile Crash with AsyncIteratorProcotol TypedThrow

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

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

#74292 In swiftlang/swift;

· pbk20191 opened on Jun 11, 2024