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No fix-it for mutation of function parameter

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

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

expressionsFeature: expressionsFeature: expressions

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

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

mutabilityFeature: storage mutabilityFeature: storage mutability

swift 6.2

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

Status: Open.

Bug

#81308 In swiftlang/swift;

· AnthonyLatsis opened on May 5, 2025

Crash on unnamed property wrapped function parameter

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

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

property wrappersFeature: property wrappersFeature: property wrappers

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

swift 6.1

Status: Open.

#76308 In swiftlang/swift;

· AnthonyLatsis opened on Sep 6, 2024

AST verifier failure <code>InOutToPointerExpr in unexpected position!</code>

assertion failureBug → crash: An assertion failureBug → crash: An assertion failure

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

expressionsFeature: expressionsFeature: expressions

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

in-out expressionsFeature → expressions: In-out expressionsFeature → expressions: In-out expressions

swift 6.0

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

variadic parametersFeature → declarations → function parameters: Variadic function parametersFeature → declarations → function parameters: Variadic function parameters

verifier

Status: Open.

#70405 In swiftlang/swift;

· compnerd opened on Dec 12, 2023

"cannot pass value pack expansion to non-pack parameter" error with a variadic parameter

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

call expressionsFeature → expressions: Call expressionsFeature → expressions: Call expressions

compilerThe Swift compiler itselfThe Swift compiler itself

expressionsFeature: expressionsFeature: expressions

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

genericsFeature: generic declarations and typesFeature: generic declarations and types

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

swift 5.9

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

unexpected errorBug: Unexpected errorBug: Unexpected error

variadic parametersFeature → declarations → function parameters: Variadic function parametersFeature → declarations → function parameters: Variadic function parameters

Status: Open.

#68755 In swiftlang/swift;

· simanerush opened on Sep 25, 2023

[Sema] Compiler crash when using a property wrapper parameter without wrapped value initializer

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

call expressionsFeature → expressions: Call expressionsFeature → expressions: Call expressions

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

expressionsFeature: expressionsFeature: expressions

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

property wrappersFeature: property wrappersFeature: property wrappers

swift 6.0

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

Status: Open.

#68570 In swiftlang/swift;

· mininny opened on Sep 17, 2023

Compiler crash at inout parameter pack

assertion failureBug → crash: An assertion failureBug → crash: An assertion failure

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

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

function typesFeature → types: function typesFeature → types: function types

genericsFeature: generic declarations and typesFeature: generic declarations and types

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

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

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

swift 5.9

typesFeature: typesFeature: types

Status: Open.

#67091 In swiftlang/swift;

· xavierjurado opened on Jul 3, 2023

Default parameter is not leveraged when the variable that is assigned the function with the default argument is called

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

default argumentsFeature: default arguments for value parametersFeature: default arguments for value parameters

expressionsFeature: expressionsFeature: expressions

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

function typesFeature → types: function typesFeature → types: function types

function valuesFeature → expressions: function valuesFeature → expressions: function values

not a bugResolution → not a bug: Reported as a bug but turned out to be expected behavior or programmer errorResolution → not a bug: Reported as a bug but turned out to be expected behavior or programmer error

swift 5.8

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

Status: Open.

#65092 In swiftlang/swift;

· andrewkykoo opened on Apr 12, 2023

Compiler crash when emitting SIL

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

default argumentsFeature: default arguments for value parametersFeature: default arguments for value parameters

existentialsFeature: values of types like `any Collection`, `Any` and `AnyObject`; type-erased valuesFeature: values of types like `any Collection`, `Any` and `AnyObject`; type-erased values

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

genericsFeature: generic declarations and typesFeature: generic declarations and types

implicit existential openingFeature → existentials: implicit opening of existentials when passed to parameters of generic typeFeature → existentials: implicit opening of existentials when passed to parameters of generic type

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

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

swift 5.9

typesFeature: typesFeature: types

variadic parametersFeature → declarations → function parameters: Variadic function parametersFeature → declarations → function parameters: Variadic function parameters

Status: Open.

#64559 In swiftlang/swift;

· jpsim opened on Mar 23, 2023

[SR-2849] Add a warning for unused parameters

compilerThe Swift compiler itselfThe Swift compiler itself

diagnostics QoIBug: Diagnostics Quality of ImplementationBug: Diagnostics Quality of Implementation

featureA feature request or implementationA feature request or implementation

function parametersFeature → declarations: function parametersFeature → declarations: function parameters

Status: Open.

#45443 In swiftlang/swift;

· swift-ci opened on Oct 4, 2016