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[SR-12799] Spurious single-element tuple error for AnyObject subscript lookup #55244

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hamishknight opened this issue May 13, 2020 · 1 comment
Closed

[SR-12799] Spurious single-element tuple error for AnyObject subscript lookup #55244

hamishknight opened this issue May 13, 2020 · 1 comment
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@hamishknight
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis

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@hamishknight
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Previous ID SR-12799
Radar None
Original Reporter @hamishknight
Type Bug
Status Closed
Resolution Done
Environment

Swift version 5.3-dev (LLVM cb105ac, Swift 66078e0d99)
Target: x86_64-apple-darwin18.5.0

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, TypeChecker
Assignee @hamishknight
Priority Medium

md5: ca49e37289640c8fd2ff90c0807db44d

Issue Description:

The following incorrectly emits an error:

import Foundation

class C {
  @objc subscript(foo _: Int) -> Int { fatalError() }
}

func foob(_ x: AnyObject) {
  _ = x[foo: 6] // Cannot create a single-element tuple with an element label
}

But it should compile.
@hamishknight
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Fixed by #31753

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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@hamishknight hamishknight

Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis
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@hamishknight