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Type checker crash applying the closure returned by @dynamicMemberLookup subscript

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

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

Status: Open.

Bug

#89990 In swiftlang/swift;

· MaxDesiatov opened on Jun 16, 2026

Failed to produce diagnostic for expression for bad Swift

compilerThe Swift compiler itselfThe Swift compiler itself

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

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

Status: Open.

Bug

#89985 In swiftlang/swift;

· FareekDev opened on Jun 16, 2026

Embedded Swift SIL verifier crash: "Two variables with different type but same scope"

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

embeddedEmbedded SwiftEmbedded Swift

SIL

Status: Open.

Bug

#89962 In swiftlang/swift;

· MaxDesiatov opened on Jun 15, 2026

Don't impose a performance penalty when using MutableSpan

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

Status: Open.

Feature

#89954 In swiftlang/swift;

· MahdiBM opened on Jun 15, 2026

Region based isolation check fail on valid code

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

Status: Open.

Bug

#89953 In swiftlang/swift;

· soumyamahunt opened on Jun 15, 2026

Region based isolation check fail on valid code

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

Status: Open.

Bug

#89947 In swiftlang/swift;

· soumyamahunt opened on Jun 15, 2026

FreeBSD AArch64: compiler validation suite results (native build) — 84% pass, 26 failures

arm64Architecture: arm64 (aarch64) — any 64-bit ARMArchitecture: arm64 (aarch64) — any 64-bit ARM

armv8Architecture: ARMv8Architecture: ARMv8

FreeBSDPlatform: FreeBSDPlatform: FreeBSD

test suiteArea: test suiteArea: test suite

Status: Open.

#89943 In swiftlang/swift;

· networkextension opened on Jun 15, 2026

SIL verification failed for swift-subprocess basic swift package project.

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

#89942 In swiftlang/swift;

· zaneenders opened on Jun 14, 2026

Accessing a typealias that references Self in generic which requires a conformance using a protocol metatype, crashes the compiler

compilerThe Swift compiler itselfThe Swift compiler itself

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

genericsFeature: generic declarations and typesFeature: generic declarations and types

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

Status: Open.

Bug

#89941 In swiftlang/swift;

· atifdev10 opened on Jun 14, 2026

Compiler failed to produce diagnostic for invalid generics declaration with Self.

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

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

Status: Open.

Bug

#89940 In swiftlang/swift;

· YOCKOW opened on Jun 14, 2026

Macro-Generated Code Availability Check

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

macro expansionsFeature → expressions: Macro expansion expressionsFeature → expressions: Macro expansion expressions

Status: Open.

Bug

#89936 In swiftlang/swift;

· mateusrodriguesxyz opened on Jun 13, 2026

Swift 6.3.2 Compiler Bug unter Windows ARM64

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

Status: Open.

Bug

#89935 In swiftlang/swift;

· bastie opened on Jun 13, 2026