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~Copyable/~Escapable crash and inconsistent error based on whether class is final or not

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

ownershipFeature: Ownership modifiers and semanticsFeature: Ownership modifiers and semantics

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

Status: Open.

#85275 In swiftlang/swift;

· ValentinWalter opened on Nov 3, 2025

Inaccurate error message: missing reinitialization of inout parameter 'x' after consume while accessing memory

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

ownershipFeature: Ownership modifiers and semanticsFeature: Ownership modifiers and semantics

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

Status: Open.

#83581 In swiftlang/swift;

· rayx opened on Aug 7, 2025

SIL memory lifetime failure in @$s17SwiftInspectLinux6PTraceVyACs5Int32VKc33_A4C256B9F4B5CA92CAF7C0E7824B424BLlfC: memory is not initialized, but should be

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

ownershipFeature: Ownership modifiers and semanticsFeature: Ownership modifiers and semantics

SIL

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

swift 6.2

Status: Open.

#80999 In swiftlang/swift;

· compnerd opened on Apr 22, 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

CMake build fails on macOS Sequoia with Xcode 16 release version

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

Status: Open.

#76631 In swiftlang/swift;

· ADKaster opened on Sep 21, 2024

Compiler Error with consuming Modifier on Actor Method in Swift 5.9

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.

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

Status: Open.

#68072 In swiftlang/swift;

· mehmeteminkartal opened on Aug 22, 2023

LinearLifetimeChecker SIL verification found an ownership error in silgen emitConstructor

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

Status: Open.

#60841 In swiftlang/swift;

· tayloraswift opened on Aug 30, 2022