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Local function forward reference of <code>lazy</code> var crashes in SILGen

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

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

value capturingFeature: Value capturing by closures and local functionsFeature: Value capturing by closures and local functions

Status: Open.

#85266 In swiftlang/swift;

· hamishknight opened on Nov 1, 2025

Runtime crash when accessing the span of an empty InlineArray

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.

#85265 In swiftlang/swift;

· Jnosh opened on Nov 1, 2025

Fix calling convention support in Swift (breaks 32-bit Windows API calls).

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

clang importerArea → compiler: The clang importerArea → compiler: The clang importer

IRGenLLVM IR generationLLVM IR generation

Status: Open.

Bug

#85263 In swiftlang/swift;

· al45tair opened on Nov 1, 2025

docs: Add concrete bundle prefix example to build-toolchain in README

Status: Open.

#85258 In swiftlang/swift;

· joshuacleetus opened on Oct 31, 2025

Nighty Windows toolchain is not usable

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

regression

toolchain

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

WindowsPlatform: WindowsPlatform: Windows

Status: Open.

#85252 In swiftlang/swift;

· bkhouri opened on Oct 31, 2025

Improve PDB generation for Swift

Status: Open.

#85247 In swiftlang/swift;

· compnerd opened on Oct 31, 2025

Enable <code>Backtrace</code> (<code>Runtime</code>) on Windows

Status: Open.

#85246 In swiftlang/swift;

· compnerd opened on Oct 31, 2025

Ship the Windows toolchain with LLVM built as a DLL

task

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

Status: Open.

#85241 In swiftlang/swift;

· Steelskin opened on Oct 31, 2025

Inconsistent behavior between <code>sending</code> parameter and captured variable

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.

#85231 In swiftlang/swift;

· rayx opened on Oct 31, 2025

Protocol requirement can be satisfied with an misnamed API inside another extension, causing runtime crash

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.

#85228 In swiftlang/swift;

· an0 opened on Oct 30, 2025

Crash referencing UUID in isolated deinit

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.

#85221 In swiftlang/swift;

· Cramsden opened on Oct 30, 2025

Expression macros should support opaque return types

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.

#85216 In swiftlang/swift;

· benpious opened on Oct 30, 2025