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Confusing diagnostic when local type transitively captures local var

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

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

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

Status: Open.

#86200 In swiftlang/swift;

· hamishknight opened on Dec 23, 2025

<code>beginBackgroundTask</code> expiration handler closure type incorrectly marked up

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.

#86197 In swiftlang/swift;

· mattneub opened on Dec 23, 2025

<code>swift</code> binary in latest nightly Windows Swift Toolchain exits immediately with exit code 309

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.

#86191 In swiftlang/swift;

· plemarquand opened on Dec 22, 2025

Generic code with an isolated param using an associated type crashes

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.

#86181 In swiftlang/swift;

· mattmassicotte opened on Dec 22, 2025

Region based isolation check fail on valid code

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.

#86180 In swiftlang/swift;

· soumyamahunt opened on Dec 22, 2025

SourceKitLSP keeps crashing when importing SwiftGodot on Windows

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

SourceKitArea → source tooling: SourceKitArea → source tooling: SourceKit

Status: Open.

#86179 In swiftlang/swift;

· natinusala opened on Dec 22, 2025

Inout generic function parameter incorrectly considered immutable when calling sugared mutating callAsFunction method

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.

#86177 In swiftlang/swift;

· jamesmmadeira opened on Dec 22, 2025

Swift SDK installation fails on official Swift 6.2.3 Docker image with <code>NSCocoaErrorDomain Code=512</code>

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.

#86174 In swiftlang/swift;

· bc-lee opened on Dec 21, 2025

[cxx-interop] Support generic constraints (e.g. <code>struct Dictionary&lt;Key, Value&gt; where Key : Hashable</code>)

c++ interopFeature: Interoperability with C++Feature: Interoperability with C++

featureA feature request or implementationA feature request or implementation

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

Status: Open.

#86172 In swiftlang/swift;

· mrousavy opened on Dec 21, 2025

Assertion failed: (!hasIsolatedParameter &amp;&amp; "building SIL function type with multiple isolated parameters")

actor isolationFeature → concurrency: Actor isolationFeature → concurrency: Actor isolation

concurrencyFeature: umbrella label for concurrency language featuresFeature: umbrella label for concurrency language features

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

Status: Open.

#86170 In swiftlang/swift;

· ahoppen opened on Dec 21, 2025

Embedded: Assertion while splitting coroutine - pass "cgscc(coro-split)"

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

embeddedEmbedded SwiftEmbedded Swift

regression

WebAssemblyPlatform: WebAssemblyPlatform: WebAssembly

Status: Open.

#86150 In swiftlang/swift;

· sliemeobn opened on Dec 19, 2025

"terminate called after throwing an instance of 'std::out_of_range'" crash when compiling with Static Linux SDK

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.

#86149 In swiftlang/swift;

· mitchellallison opened on Dec 19, 2025