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Diagnostic controls don't seem to work as expected for linked diagnostic groups

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

Status: Open.

Bug

#86978 In swiftlang/swift;

· jamieQ opened on Feb 4, 2026

Conformance to nonisolated protocol with all requirements being isolated is incorrectly inferred as isolated.

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

Status: Open.

Bug

#86976 In swiftlang/swift;

· nickolas-pohilets opened on Feb 4, 2026

Unrecognized diagnostic groups treated as global diagnostic control flags on main

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

Status: Open.

Bug

#86969 In swiftlang/swift;

· jamieQ opened on Feb 4, 2026

Support direct retain/release on Windows

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

Status: Open.

Task

#86965 In swiftlang/swift;

· compnerd opened on Feb 3, 2026

[windows] Building the toolchain with <code>-DebugInfo</code> takes up to 64GB of RAM

WindowsPlatform: WindowsPlatform: Windows

Status: Open.

#86961 In swiftlang/swift;

· charles-zablit opened on Feb 3, 2026

DWARF v2 support in the Runtime module's DwarfReader

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

Status: Open.

Feature

#86955 In swiftlang/swift;

· weissi opened on Feb 3, 2026

Undesired isolation inference for implementations of implicitly <code>nonisolated(nonsending)</code> requirements

actorFeature → concurrency: `actor` declarationsFeature → concurrency: `actor` declarations

compilerThe Swift compiler itselfThe Swift compiler itself

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

nonisolated(nonsending)Feature → modifiers: The "nonisolated(nonsending)" modifierFeature → modifiers: The "nonisolated(nonsending)" modifier

swift 6.3

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

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

Status: Open.

Bug

#86944 In swiftlang/swift;

· AnthonyLatsis opened on Feb 2, 2026

Default actor isolation: "main actor-isolated conformance cannot be used in nonisolated context"

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

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

declarationsFeature: declarationsFeature: declarations

Status: Open.

Bug

#86943 In swiftlang/swift;

· Aquilosion opened on Feb 2, 2026

sourcekitd does not use the same module cache as the compiler on Windows

source toolingArea: IDE support, SourceKit, and other source toolingArea: IDE support, SourceKit, and other source tooling

SourceKitArea → source tooling: SourceKitArea → source tooling: SourceKit

test failure

test suiteArea: test suiteArea: test suite

WindowsPlatform: WindowsPlatform: Windows

Status: Open.

Bug

#86930 In swiftlang/swift;

· hnrklssn opened on Feb 2, 2026

[TypeChecker] Crashes during type checking protocol conformance which has a default value for associatedtype

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.

Bug

#86928 In swiftlang/swift;

· FlickerSoul opened on Feb 2, 2026

Compiler crash: Found outside of lifetime use

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.

Bug

#86924 In swiftlang/swift;

· tomasf opened on Feb 1, 2026

Swift 6.2.1 crash: Invalid conformance during SILGen with key‑path map in async test

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.

Bug

#86917 In swiftlang/swift;

· DPrakashhh opened on Jan 31, 2026