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MainActor is lost in an async function thereby causing a crash

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

#88731 In swiftlang/swift;

· Brett-Best opened on Apr 29, 2026

Incorrect ‘non-Sendable type’ error when passing isolated async closure to @concurrent function

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

Status: Open.

Bug

#88724 In swiftlang/swift;

· NotTheNHK opened on Apr 28, 2026

swiftc crash "Cannot initialize a nonCopyable type with a guaranteed value" in function forwardToInit at SILValue.h:375

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

#88717 In swiftlang/swift;

· snej opened on Apr 28, 2026

[cxx-interop] Defaulted in-class friend operator== causes undefined-symbol link error from Swift ==

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

#88710 In swiftlang/swift;

· mrousavy opened on Apr 28, 2026

Misleading error about nonisolated not being applicable to mutable stored properties

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

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

good first issueGood for newcomersGood for newcomers

swift 6.3

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

Status: Open.

Bug

#88709 In swiftlang/swift;

· AnthonyLatsis opened on Apr 28, 2026

Misleading error on ForEach line

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

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

swift 6.3

SwiftUIFlag: Involves SwiftUIFlag: Involves SwiftUI

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

Status: Open.

Bug

#88700 In swiftlang/swift;

· GreatOmm opened on Apr 28, 2026

Embedded Swift link failure using Double(_: String) (missing __swift_stdlib_strtod_clocale)

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

Status: Open.

Bug

#88698 In swiftlang/swift;

· wfltaylor opened on Apr 28, 2026

Add shorthand for Set

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

Status: Open.

Feature

#88696 In swiftlang/swift;

· dsrenesanse opened on Apr 28, 2026

SILGen crash: _overrideLifetime(mutating:) in _modify subscript on ~Copyable protocol extension

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

#88677 In swiftlang/swift;

· slice opened on Apr 26, 2026

SILGenExpr.cpp:6104: swift::Lowering::SILGenFunction::emitBindOptional: Assertion optValue.isPlusOne(*this) && "Can only bind plus one values" failed

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

#88676 In swiftlang/swift;

· tayloraswift opened on Apr 25, 2026

Indexing Swift that references an objc compatibility alias creates references with no definition

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

Status: Open.

Bug

#88653 In swiftlang/swift;

· dylansturg opened on Apr 24, 2026

An explicit isolated conformance is required despite InferIsolatedConformances being enabled

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

Status: Open.

Bug

#88651 In swiftlang/swift;

· mattmassicotte opened on Apr 24, 2026