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<code>-O</code> breaks KeyPath resolution

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

manglingArea → compiler: ManglingArea → compiler: Mangling

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

run-time crashBug → crash: Swift code crashed during executionBug → crash: Swift code crashed during execution

runtimeThe Swift RuntimeThe Swift Runtime

Status: Open.

#78948 In swiftlang/swift;

· lhunath opened on Jan 27, 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

Crash in HandleInlinedLandingPad

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

CodeGen

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

IRGenLLVM IR generationLLVM IR generation

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

Status: Open.

#78312 In swiftlang/swift;

· wtholliday opened on Dec 20, 2024

Redundant overflow check in a simple 3-line function

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

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

performance

Status: Open.

#77195 In swiftlang/swift;

· glessard opened on Oct 23, 2024

Unused expression does not trigger precondition in <code>-O</code> mode.

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

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

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

Status: Open.

#72455 In swiftlang/swift;

· oscbyspro opened on Mar 20, 2024

Combination of <code>-g</code> and <code>-O</code> flags with Embedded Swift crashes <code>swiftc</code> in IRGen

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

debug infoArea → compiler → IRGen: Debug information emissionArea → compiler → IRGen: Debug information emission

embeddedEmbedded SwiftEmbedded Swift

IRGenLLVM IR generationLLVM IR generation

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

Status: Open.

#72118 In swiftlang/swift;

· MaxDesiatov opened on Mar 6, 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

Runtime memory corruption regression in Swift 5.8

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

memory corruption

missing infoResolution: Is missing crucial info such as a test case or a concise descriptionResolution: Is missing crucial info such as a test case or a concise description

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

regression

swift 5.8

Status: Open.

#65757 In swiftlang/swift;

· anlaital opened on May 8, 2023

Heap corruption when awaiting AsyncSequence in top level

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

memory corruption

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

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

swift 5.8

Status: Open.

#65001 In swiftlang/swift;

· sidepelican opened on Apr 7, 2023

[Xcode 14.3] Can't build project when setting SWIFT_OPTIMIZATION_LEVEL as [-O]

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

DCEArea → compiler → SILOptimizer: Dead Code EliminationArea → compiler → SILOptimizer: Dead Code Elimination

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

regression

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

swift 5.8

Status: Open.

#64859 In swiftlang/swift;

· ShawnBaek opened on Apr 3, 2023

compiler crash when stack-promoting array literals inside specialized @inlinable generic functions

@inlinableFeature → attributes: the @inlinable attributeFeature → attributes: the @inlinable attribute

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

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

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

Status: Open.

#63775 In swiftlang/swift;

· tayloraswift opened on Feb 19, 2023

Possibly Swift runtime bug in iOS &lt;= 15.2

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

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

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

run-time crashBug → crash: Swift code crashed during executionBug → crash: Swift code crashed during execution

runtimeThe Swift RuntimeThe Swift Runtime

Status: Open.

#63333 In swiftlang/swift;

· iDmitriyy opened on Jan 31, 2023