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Completion crash in inheritance clause

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.

code completionArea → source tooling: code completionArea → source tooling: code completion

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

Status: Open.

#82208 In swiftlang/swift;

· hamishknight opened on Jun 12, 2025

Parameter pack compilation crash "This isn't an lvalue" with 6.0.3 OSS toolchain but works with Xcode toolchain

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.

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

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

SILGenArea → compiler: The SIL generation stageArea → compiler: The SIL generation stage

Status: Open.

#79870 In swiftlang/swift;

· marcprux opened on Mar 9, 2025

5.10 compiler emits syntax error on code in #if(compiler>=6.0) block under specific conditions

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.

parserArea → compiler: The legacy C++ parserArea → compiler: The legacy C++ parser

† libswiftSyntaxArchive • Area → compiler: the once-integrated C++ Syntax library succeeded by SwiftSyntaxArchive • Area → compiler: the once-integrated C++ Syntax library succeeded by SwiftSyntax

Status: Open.

#79285 In swiftlang/swift;

· gwynne opened on Feb 10, 2025

SIL Value Ownership Error causes a compiler crash when building in Release mode for 6.0-series toolchains.

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.

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

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

SIL

SIL ownershipArea → compiler → SIL: SIL ownershipArea → compiler → SIL: SIL ownership

swift 6.0

verifier

Status: Open.

#78923 In swiftlang/swift;

· fibrechannelscsi opened on Jan 26, 2025

Compiler crash with lifetime issue with latest January trunk snapshots

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.

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

SIL

SIL ownershipArea → compiler → SIL: SIL ownershipArea → compiler → SIL: SIL ownership

swift 5.10

Status: Open.

#78444 In swiftlang/swift;

· marcprux opened on Jan 6, 2025

Compiler crash attempting to call a function with a pack archetype expansion parameter

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.

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

function typesFeature → types: function typesFeature → types: function types

genericsFeature: generic declarations and typesFeature: generic declarations and types

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

swift 6.1

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

typesFeature: typesFeature: types

Status: Open.

#78396 In swiftlang/swift;

· hamishknight opened on Dec 31, 2024

swift-frontend bundled with Xcode 15.4 fails “Unhandled adjustment” assertion on GitHub Actions

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.

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

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

Status: Open.

#75830 In swiftlang/swift;

· jaanus opened on Aug 12, 2024

An associatedtype for a constrained derived protocol's associatedtype crashes the compiler.

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

associatedtypeFeature → declarations → protocol: `associatedtype` declarationsFeature → declarations → protocol: `associatedtype` declarations

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

genericsFeature: generic declarations and typesFeature: generic declarations and types

protocolFeature → type declarations: Protocol declarationsFeature → type declarations: Protocol declarations

swift 6.0

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

Status: Open.

#75591 In swiftlang/swift;

· JessyCatterwaul opened on Jul 31, 2024

Variadic generics crash expanding <code>repeat GPack&lt;repeat each T, each T&gt;</code>

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.

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

genericsFeature: generic declarations and typesFeature: generic declarations and types

pack expansionsFeature → expressions: Pack expansion expressionsFeature → expressions: Pack expansion expressions

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

SIL

swift 6.0

typesFeature: typesFeature: types

verifier

Status: Open.

#75329 In swiftlang/swift;

· AnthonyLatsis opened on Jul 18, 2024

Compiler crash on <code>repeat inout each T</code> parameter

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.

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

declarationsFeature: declarationsFeature: declarations

funcFeature → declarations: FunctionsFeature → declarations: Functions

genericsFeature: generic declarations and typesFeature: generic declarations and types

inoutFeature → types: `inout` typesFeature → types: `inout` types

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

swift 6.0

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

typesFeature: typesFeature: types

Status: Open.

#74868 In swiftlang/swift;

· hamishknight opened on Jul 1, 2024

Compiler crash when using inout argument with variadic generic param

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

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

genericsFeature: generic declarations and typesFeature: generic declarations and types

in-out expressionsFeature → expressions: In-out expressionsFeature → expressions: In-out expressions

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

swift 6.0

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

Status: Open.

#74867 In swiftlang/swift;

· hamishknight opened on Jul 1, 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