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Switching on unqualified enum case in closure with <code>self</code> capture 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.

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

pattern matchingFeature: pattern matchingFeature: pattern matching

patternsFeature: patternsFeature: patterns

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

Status: Open.

#80657 In swiftlang/swift;

· hamishknight opened on Apr 8, 2025

Cannot resolve enum element pattern with sugared type qualifier

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

patternsFeature: patternsFeature: patterns

sugared typesFeature: sugared types, e.g. 'Int?' or '[Int]'Feature: sugared types, e.g. 'Int?' or '[Int]'

swift 6.2

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

typesFeature: typesFeature: types

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

Bug

#80632 In swiftlang/swift;

· AnthonyLatsis opened on Apr 8, 2025

Trailing closures are wrongly accepted for enum-case-patterns

accepts invalidBug: Accepts invalidBug: Accepts invalid

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

closuresFeature: closuresFeature: closures

compilerThe Swift compiler itselfThe Swift compiler itself

enum case patternsFeature → patterns: Enumeration case patternsFeature → patterns: Enumeration case patterns

patternsFeature: patternsFeature: patterns

swift 6.2

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

Status: Open.

#79047 In swiftlang/swift;

· rintaro opened on Jan 30, 2025

Poor diagnostic for misspelled enum case name in catch clause

associated valuesFeature → enums: enum cases with associated values (payload)Feature → enums: enum cases with associated values (payload)

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

enumFeature → type declarations: Swift enumeration declarationsFeature → type declarations: Swift enumeration declarations

enum case patternsFeature → patterns: Enumeration case patternsFeature → patterns: Enumeration case patterns

enum casesFeature → enums: Enum casesFeature → enums: Enum cases

patternsFeature: patternsFeature: patterns

swift 6.0

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

wildcard patternFeature → patterns: The wildcard (underscore) patternFeature → patterns: The wildcard (underscore) pattern

Status: Open.

#72505 In swiftlang/swift;

· jrose-signal opened on Mar 22, 2024

Assertion failed: parenTy &amp;&amp; "Associated value type is neither paren nor tuple?", file S:\SourceCache\swift-project\swift\lib\Sema\TypeCheckPattern.cpp, line 1618

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

patternsFeature: patternsFeature: patterns

source toolingArea: IDE support, SourceKit, and other source toolingArea: IDE support, SourceKit, and other source tooling

SourceKitArea → source tooling: SourceKitArea → source tooling: SourceKit

swift 5.9

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

Status: Open.

#65970 In swiftlang/swift;

· compnerd opened on May 17, 2023

Bad diagnostic when matching tuple pattern to existential

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

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

pattern matchingFeature: pattern matchingFeature: pattern matching

patternsFeature: patternsFeature: patterns

swift 5.9

tuplesFeature: tuplesFeature: tuples

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

Status: Open.

#65243 In swiftlang/swift;

· AnthonyLatsis opened on Apr 18, 2023

Bad diagnostic when attempting to use <code>as?</code> in a pattern

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

castingFeature: explicit casting (is, as, as? and as!)Feature: explicit casting (is, as, as? and as!)

compilerThe Swift compiler itselfThe Swift compiler itself

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

pattern matchingFeature: pattern matchingFeature: pattern matching

patternsFeature: patternsFeature: patterns

swift 5.9

Status: Open.

#65117 In swiftlang/swift;

· hamishknight opened on Apr 12, 2023

"Stored value type does not match pointer operand type!" compiler crash

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.

CodeGen

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

name shadowingFeature: name shadowingFeature: name shadowing

patternsFeature: patternsFeature: patterns

swift 5.5

Status: Open.

#59572 In swiftlang/swift;

· LeoNatan opened on Jun 19, 2022

[SR-11318] Incorrect "Case will never be executed" warning

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

pattern matchingFeature: pattern matchingFeature: pattern matching

patternsFeature: patternsFeature: patterns

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

statementsFeature: statementsFeature: statements

swift 5.9

switchFeature → statements: 'switch' statementsFeature → statements: 'switch' statements

switch casesFeature → statements → switch: 'switch' statement casesFeature → statements → switch: 'switch' statement cases

Status: Open.

#53719 In swiftlang/swift;

· swift-ci opened on Aug 16, 2019

[SR-10077] Switching over duplicate enum case names won't compile

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

declarationsFeature: declarationsFeature: declarations

enumFeature → type declarations: Swift enumeration declarationsFeature → type declarations: Swift enumeration declarations

enum casesFeature → enums: Enum casesFeature → enums: Enum cases

overloadingFeature: Overloading symbol namesFeature: Overloading symbol names

pattern matchingFeature: pattern matchingFeature: pattern matching

patternsFeature: patternsFeature: patterns

swift 5.9

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

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#52479 In swiftlang/swift;

· swift-ci opened on Mar 11, 2019

[SR-8213] Compiler may indicate "case will never be executed" even if it is unavoidable to execute the case in switch statement.

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

good first issueGood for newcomersGood for newcomers

pattern matchingFeature: pattern matchingFeature: pattern matching

patternsFeature: patternsFeature: patterns

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

statementsFeature: statementsFeature: statements

swift 5.9

switchFeature → statements: 'switch' statementsFeature → statements: 'switch' statements

switch casesFeature → statements → switch: 'switch' statement casesFeature → statements → switch: 'switch' statement cases

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

Status: Open.

#50745 In swiftlang/swift;

· YOCKOW opened on Jul 10, 2018