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Accessing isolation of <code>sending @escaping @isolated(any)</code> parameter crashes compiler

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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.

#83229 In swiftlang/swift;

· jamieQ opened on Jul 22, 2025

Compiler crash around non-copyables: no address for captured var

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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.

#83220 In swiftlang/swift;

· MahdiBM opened on Jul 21, 2025

Crash accessing a KeyPath to generic nested container

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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.

#83197 In swiftlang/swift;

· mrbodich opened on Jul 21, 2025

Passing Parameter Pack Between Methods Crashes the Compiler

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

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

parameter packsFeature → generics: Parameter packsFeature → generics: Parameter packs

SILGenArea → compiler: The SIL generation stageArea → compiler: The SIL generation stage

Status: Open.

#83194 In swiftlang/swift;

· thecoolwinter opened on Jul 20, 2025

Subscripts that use type placeholders crash the compiler.

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

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

declarationsFeature: declarationsFeature: declarations

subscriptFeature: Subscript declarationsFeature: Subscript declarations

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

Status: Open.

#83156 In swiftlang/swift;

· JessyCatterwaul opened on Jul 17, 2025

Calling free function template with SWIFT_NAME + import-as-member as free function crashes compiler

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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.

#83146 In swiftlang/swift;

· maddyadams opened on Jul 17, 2025

Calling friend function of type nested in C++ namespace crashes Swift compiler

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

c++ interopFeature: Interoperability with C++Feature: Interoperability with C++

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

Status: Open.

#83085 In swiftlang/swift;

· maddyadams opened on Jul 15, 2025

Assigning a non-nil value to a weak SWIFT_SHARED_REFERENCE variable crashes at runtime

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

c++ interopFeature: Interoperability with C++Feature: Interoperability with C++

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

Status: Open.

#83080 In swiftlang/swift;

· maddyadams opened on Jul 15, 2025

Calling __convertToBool() from Swift on derived C++ value type crashes

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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.

#83078 In swiftlang/swift;

· maddyadams opened on Jul 15, 2025

Crash when using a protocol extension with a self requirement in an assignment to existential any type

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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.

#83031 In swiftlang/swift;

· mbernson opened on Jul 14, 2025

[Crash][Optimizer] Non trivial values, non address values, and non guaranteed function args must have at least one lifetime ending use?! Found ownership error?!

bugA deviation from expected or documented behavior. Also: expected but undesirable behavior.A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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.

#83018 In swiftlang/swift;

· WindowsMEMZ opened on Jul 12, 2025

Assertion failed: isa&lt;To&gt;(Val) &amp;&amp; "cast&lt;Ty&gt;() argument of incompatible type!", file D:\r\_work\swift-build\swift-build\SourceCache\llvm-project\llvm\include\llvm/Support/Casting.h, line 578

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

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

IRGenLLVM IR generationLLVM IR generation

Status: Open.

#83017 In swiftlang/swift;

· compnerd opened on Jul 12, 2025