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Enable <code>MainActor</code> in embedded concurrency, add <code>ExecutorImpl.cpp</code>

concurrency runtimeFeature: umbrella label for concurrency runtime featuresFeature: umbrella label for concurrency runtime features

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

embeddedEmbedded SwiftEmbedded Swift

WASIWebAssembly System Interface supportWebAssembly System Interface support

WebAssemblyPlatform: WebAssemblyPlatform: WebAssembly

Status: Open (in progress).

swiftlang/swiftnumber 82331

#82331 In swiftlang/swift;

· MaxDesiatov opened on Jun 18, 2025

AsyncThrowingStream.init(unfolding:) has no onCancel parameter

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

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

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

standard libraryArea: Standard library umbrellaArea: Standard library umbrella

Status: Open.

#77974 In swiftlang/swift;

· ole opened on Dec 5, 2024

AsyncStream &amp; AsyncThrowingStream behavioral divergences &amp; misleading documentation

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

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

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

standard libraryArea: Standard library umbrellaArea: Standard library umbrella

Status: Open.

#76547 In swiftlang/swift;

· jamieQ opened on Sep 18, 2024

<code>Task.yield()</code> and <code>Task.sleep()</code> do not respect task executor preference

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

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

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

standard libraryArea: Standard library umbrellaArea: Standard library umbrella

swift 6.0

unexpected behaviorBug: Unexpected behavior or incorrect outputBug: Unexpected behavior or incorrect output

Status: Open.

#74395 In swiftlang/swift;

· stephencelis opened on Jun 13, 2024

TaskGroup needs a better data structure

concurrency runtimeFeature: umbrella label for concurrency runtime featuresFeature: umbrella label for concurrency runtime features

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

featureA feature request or implementationA feature request or implementation

performance

Status: Open.

#71212 In swiftlang/swift;

· za-creature opened on Jan 29, 2024

Swift concurrency fails consistently under load

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

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

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

memory corruption

standard libraryArea: Standard library umbrellaArea: Standard library umbrella

swift 5.8

TaskGroupArea → standard library → Concurrency: The `TaskGroup` typeArea → standard library → Concurrency: The `TaskGroup` type

Status: Open.

#65537 In swiftlang/swift;

· brianm998 opened on Apr 30, 2023

Task.sleep() is inaccurate on Windows

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

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

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

standard libraryArea: Standard library umbrellaArea: Standard library umbrella

swift 5.9

timeArea → standard library → Concurrency: Time APIsArea → standard library → Concurrency: Time APIs

unexpected behaviorBug: Unexpected behavior or incorrect outputBug: Unexpected behavior or incorrect output

WindowsPlatform: WindowsPlatform: Windows

Status: Open.

#64935 In swiftlang/swift;

· MarSe32m opened on Apr 5, 2023

Allow hooking Tracing.h hooks for swift-benchmark

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

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

standard libraryArea: Standard library umbrellaArea: Standard library umbrella

Status: Open.

#64636 In swiftlang/swift;

· hassila opened on Mar 27, 2023

Sleeping tasks high memory usage after being cancelled

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

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

ConcurrencуArea → standard library: The `Concurrency` module under the standard library umbrellaArea → standard library: The `Concurrency` module under the standard library umbrella

standard libraryArea: Standard library umbrellaArea: Standard library umbrella

swift 5.6

TаskArea → standard library → Concurrency: The `Task` typeArea → standard library → Concurrency: The `Task` type

unexpected behaviorBug: Unexpected behavior or incorrect outputBug: Unexpected behavior or incorrect output

Status: Open.

#60441 In swiftlang/swift;

· MarSe32m opened on Aug 8, 2022