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chaining with non Escapable: borrowed and cannot be consumed

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

Status: Open.

Bug

#87853 In swiftlang/swift;

· blindspotbounty opened on Mar 13, 2026

@available(SwiftStdlib 6.0, *) on default AsyncIteratorProtocol.next() does not match actual runtime availability (only available in 6.1)

availabilityThe "available" attribute and availability checking in generalThe "available" attribute and availability checking in general

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 6.2

Status: Open.

Bug

#87849 In swiftlang/swift;

· yujingaya opened on Mar 13, 2026

Call to preconcurrency optional protocol requirement not downgraded to warning

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

compilerThe Swift compiler itselfThe Swift compiler itself

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

expressionsFeature: expressionsFeature: expressions

objective-c interopFeature: Interoperability with Objective-CFeature: Interoperability with Objective-C

optional protocol requirementsFeature → protocol: optional protocol requirementsFeature → protocol: optional protocol requirements

swift 6.3

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

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

Bug

#87848 In swiftlang/swift;

· AnthonyLatsis opened on Mar 13, 2026

Inconsistent nonisolated(nonsending) Inference for closures with NonisolatedNonsendingByDefault

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

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

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

expressionsFeature: expressionsFeature: expressions

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

Status: Open.

Bug

#87842 In swiftlang/swift;

· NotTheNHK opened on Mar 12, 2026

Compiler crash when applying a macro to a nested type in a constrained extension on generic type

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

#87839 In swiftlang/swift;

· jeremyabannister opened on Mar 12, 2026

Add fix-its for @dynamicCallable and @dynamicMemberLookup to add missing requirements

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

Status: Open.

Feature

#87837 In swiftlang/swift;

· atifdev10 opened on Mar 12, 2026

No fix-it for escaping closure captures 'inout' parameter

capture listsFeature → closures: Closure capture listsFeature → closures: Closure capture lists

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics qualityBug: The quality of compiler diagnosticsBug: The quality of compiler diagnostics

expressionsFeature: expressionsFeature: expressions

fix-itsFeature: diagnostic fix-itsFeature: diagnostic fix-its

good first issueGood for newcomersGood for newcomers

inoutFeature → types: `inout` typesFeature → types: `inout` types

SIL

swift 6.3

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

Status: Open.

Bug

#87830 In swiftlang/swift;

· AnthonyLatsis opened on Mar 12, 2026

Misleading diagnostic for reference to nonexistent member in closure

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics qualityBug: The quality of compiler diagnosticsBug: The quality of compiler diagnostics

expressionsFeature: expressionsFeature: expressions

swift 6.3

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

Status: Open.

Bug

#87825 In swiftlang/swift;

· AnthonyLatsis opened on Mar 12, 2026

Compiler has an inconsistent view on a closure isolation internally

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

Status: Open.

Bug

#87824 In swiftlang/swift;

· rayx opened on Mar 12, 2026

(6.3 regression) "Failed to produce diagnostic" with missing closure argument

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics qualityBug: The quality of compiler diagnosticsBug: The quality of compiler diagnostics

expressionsFeature: expressionsFeature: expressions

swift 6.3

Status: Open.

Bug

#87818 In swiftlang/swift;

· KeithBauerANZ opened on Mar 11, 2026

Concurrency module needs to be updated to typed throws

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

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

Status: Open.

Task

#87810 In swiftlang/swift;

· iCharlesHu opened on Mar 11, 2026

Tests are failing when using CFRunLoopPerformBlock on the same thread in more than 15 tests

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

Status: Open.

Bug

#87805 In swiftlang/swift;

· mrtsamma opened on Mar 11, 2026