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typechecker regression when calling protocol requirement through an existential of a refining protocol

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

constrained existentialsFeature → existentials: constrained existentials such as 'any Collection<Int>'Feature → existentials: constrained existentials such as 'any Collection<Int>'

existential member accessesFeature → existentials: existential member accessesFeature → existentials: existential member accesses

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

genericsFeature: generic declarations and typesFeature: generic declarations and types

regression

swift 6.1

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

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#81712 In swiftlang/swift;

· tayloraswift opened on May 22, 2025

Trailing comma not allowed in @available annotation despite SE-0439

attributesFeature: Declaration and type attributesFeature: Declaration and type attributes

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

parserArea → compiler: The legacy C++ parserArea → compiler: The legacy C++ parser

swift 6.2

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#81475 In swiftlang/swift;

· calda opened on May 13, 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

fatal error LNK1322: cannot avoid potential ARM hazard (Cortex-A53 MPCore processor bug #843419) in section 0x1

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

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

continuous integration

unexpected errorBug: Unexpected errorBug: Unexpected error

WindowsPlatform: WindowsPlatform: Windows

Status: Open.

#79740 In swiftlang/swift;

· weliveindetail opened on Mar 3, 2025

--debug-swift: undefined symbol: ss27_allocateUninitializedArrayySayxG_BptBwlFyp_Tg5

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

build errorErrors when building the toolchain, not regular Swift codeErrors when building the toolchain, not regular Swift code

build-scriptArea → utils: The build scriptArea → utils: The build script

linker error

LinuxPlatform: LinuxPlatform: Linux

unexpected errorBug: Unexpected errorBug: Unexpected error

utilsArea: the build system and other accessory scripts under the "utils" directoryArea: the build system and other accessory scripts under the "utils" directory

Status: Open.

#78815 In swiftlang/swift;

· xavgru12 opened on Jan 22, 2025

Swift 6 fails to cast inferred function types as return types from implicit @Sendable on return 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

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

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

implicit conversionsFeature: implicit conversionsFeature: implicit conversions

SendableArea → standard library: The Sendable protocolArea → standard library: The Sendable protocol

swift 6.2

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

typesFeature: typesFeature: types

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#78769 In swiftlang/swift;

· schifano opened on Jan 21, 2025

Implicit cast from <code>@Sendable</code> functions to non-sendable ones doesn't happen in arbitrary expressions

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

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

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

implicit conversionsFeature: implicit conversionsFeature: implicit conversions

SendableArea → standard library: The Sendable protocolArea → standard library: The Sendable protocol

swift 6.2

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

typesFeature: typesFeature: types

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#78753 In swiftlang/swift;

· li3zhen1 opened on Jan 20, 2025

Chaining type pack breaks type inference and fails to 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

genericsFeature: generic declarations and typesFeature: generic declarations and types

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

swift 6.2

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

type inferenceFeature: type inferenceFeature: type inference

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#78725 In swiftlang/swift;

· stephencelis opened on Jan 17, 2025

Poor type inference with typed throws

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

error handling

genericsFeature: generic declarations and typesFeature: generic declarations and types

swift 6.2

throws & rethrowsFeature → error handling: throws & rethrowsFeature → error handling: throws & rethrows

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

type inferenceFeature: type inferenceFeature: type inference

typed throwsFeature → error handling → throws & rethrows: Typed throwsFeature → error handling → throws & rethrows: Typed throws

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

Bug

#78639 In swiftlang/swift;

· karwa opened on Jan 14, 2025

Closure parameter type cannot be inferred when contextual type is pack expansion

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

expressionsFeature: expressionsFeature: expressions

genericsFeature: generic declarations and typesFeature: generic declarations and types

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

swift 6.2

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

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#78426 In swiftlang/swift;

· AnthonyLatsis opened on Jan 3, 2025

[stdlib] Unable to compile for <code>riscv64-unknown-linux-gnu</code>

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

cross-compilationArea → utils: Cross-compilation of project sourcesArea → utils: Cross-compilation of project sources

platform support

riscvArchitecture: RISC-VArchitecture: RISC-V

swift 6.0

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#78349 In swiftlang/swift;

· colemancda opened on Dec 23, 2024

Solver-based cursor info doesn't work at top level

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

cursor infoArea → source tooling: cursor infoArea → source tooling: cursor info

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

SourceKitArea → source tooling: SourceKitArea → source tooling: SourceKit

swift 6.0

unexpected errorBug: Unexpected errorBug: Unexpected error

Status: Open.

#77982 In swiftlang/swift;

· hamishknight opened on Dec 5, 2024