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No compiler diagnostic when declaring a Container type variable with an Array literal that includes a closure expecting a closure argument list but has no such list

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

Status: Open.

Bug

#88570 In swiftlang/swift;

· rwfii opened on Apr 20, 2026

error: pattern that the region-based isolation checker does not understand how to check

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

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

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

Status: Open.

Bug

#88569 In swiftlang/swift;

· MaxDesiatov opened on Apr 20, 2026

Windows: MSVC emits bad metadata sections for toy programs with CodeView debug info

CodeViewCodeView Debug Info FormatCodeView Debug Info Format

Status: Open.

Bug

#88566 In swiftlang/swift;

· speednoisemovement opened on Apr 20, 2026

Compiler crash when building docc with codeview debug format on Windows

CodeViewCodeView Debug Info FormatCodeView Debug Info Format

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

#88563 In swiftlang/swift;

· Steelskin opened on Apr 20, 2026

cannot reference borrowed parameter (of Copyable type) in non-escaping closure

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

Status: Open.

Bug

#88561 In swiftlang/swift;

· lukaskollmer opened on Apr 20, 2026

implicit StringLiteral → UnsafePointer<CChar> conversion not applied when pattern matching and suitable ~= overload exists

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

Status: Open.

Bug

#88560 In swiftlang/swift;

· lukaskollmer opened on Apr 20, 2026

Reduce reliance on "Developer Mode"

Status: Open.

#88554 In swiftlang/swift;

· compnerd opened on Apr 20, 2026

Support code-generation for 16-bit floats

Status: Open.

#88553 In swiftlang/swift;

· compnerd opened on Apr 20, 2026

setup pages on swift.org to redirect users from Windows installer

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

Status: Open.

Task

#88552 In swiftlang/swift;

· compnerd opened on Apr 19, 2026

Large InlineArray crashes

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

Status: Open.

Bug

#88550 In swiftlang/swift;

· KeithBauerANZ opened on Apr 19, 2026

InlineArray takes *compilation* time proportional to number of elements

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

Status: Open.

Bug

#88549 In swiftlang/swift;

· KeithBauerANZ opened on Apr 19, 2026

No compiler diagnostic when using untyped if/else statements as expressions with tuple destructuring if the else statement return value includes an Optional

compilerThe Swift compiler itselfThe Swift compiler itself

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

expressionsFeature: expressionsFeature: expressions

failed to produce diagnosticBug → internal error: Failed to produce diagnostic for expressionBug → internal error: Failed to produce diagnostic for expression

Status: Open.

Bug

#88546 In swiftlang/swift;

· rwfii opened on Apr 19, 2026