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compiler crash: Abstract conformance with bad subject 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.

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

Status: Open.

#85084 In swiftlang/swift;

· lukaskollmer opened on Oct 23, 2025

Crash when trying to emit module with typealias for @convention(block) function 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.

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

Status: Open.

#85082 In swiftlang/swift;

· nickolas-pohilets opened on Oct 23, 2025

SIL memory lifetime failure: &quo 8000 t;memory is not initialized, but should be" at MemoryLifetimeVerifier.cpp:268

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

Status: Open.

#85063 In swiftlang/swift;

· MaxDesiatov opened on Oct 22, 2025

Region based isolation checker unable to evaluate test using withKnownIssue and confirmation functions in actor isolated test

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

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

Status: Open.

#85045 In swiftlang/swift;

· StarLard opened on Oct 21, 2025

Compiler crash when writing "try" keyword before instance variable in closure

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

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

Status: Open.

Bug

#85034 In swiftlang/swift;

· nickasd opened on Oct 21, 2025

The new verifyUSRToDeclReconstruction checking cannot handle @abi when the abi name does not exist in real ast

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

SourceKitArea → source tooling: SourceKitArea → source tooling: SourceKit

Status: Open.

#85030 In swiftlang/swift;

· ktoso opened on Oct 21, 2025

Undefined behavior: <code>let</code> initializers admit accessing uninitialized memory in some cases.

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

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

Status: Open.

#85028 In swiftlang/swift;

· jamieQ opened on Oct 21, 2025

Overload resolution picks wrong initializer for some metatype arguments

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

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

Status: Open.

#85020 In swiftlang/swift;

· clackary opened on Oct 20, 2025

[Compiler] Crash when using swift concurrency

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

Status: Open.

#85017 In swiftlang/swift;

· mustiikhalil opened on Oct 20, 2025

error creating ASTInvocation: 'test.swift' is not part of the input files when opening virtual file and passing <code>-working-directory</code>

SourceKitArea → source tooling: SourceKitArea → source tooling: SourceKit

Status: Open.

#85003 In swiftlang/swift;

· ahoppen opened on Oct 20, 2025

Use C-function in swift

Status: Open.

#85001 In swiftlang/swift;

· mikeno-VI opened on Oct 19, 2025

Use <code>__ehdr_start</code> where available to find the image base address before calling <code>swift_addNewDSOImage()</code>.

AndroidPlatform: AndroidPlatform: Android

FreeBSDPlatform: FreeBSDPlatform: FreeBSD

LinuxPlatform: LinuxPlatform: Linux

OpenBSDPlatform: OpenBSDPlatform: OpenBSD

performance

Status: Open.

Task

#84997 In swiftlang/swift;

· grynspan opened on Oct 18, 2025