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[SR-9264] Unexpected compiler error message when block destructing tuple arguments has errors in body. #51741

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swift-ci opened this issue Nov 15, 2018 · 1 comment
Open

[SR-9264] Unexpected compiler error message when block destructing tuple arguments has errors in body. #51741

swift-ci opened this issue Nov 15, 2018 · 1 comment
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation type checker Area → compiler: Semantic analysis

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@swift-ci
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Previous ID SR-9264
Radar None
Original Reporter voxar (JIRA User)
Type Bug
Environment

Xcode 10.1 (10B61)

Apple Swift version 4.2.1 (swiftlang-1000.11.42 clang-1000.11.45.1)

Target: x86_64-apple-darwin18.0.0

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, DiagnosticsQoI, TypeChecker
Assignee None
Priority Medium

md5: ba1f82350217714b539634b4f35fc769

Issue Description:

The following sample fails to compile as expected but generates the wrong error message.

"123".enumerated().forEach { (a, b) in 
  print(a+b)
}

Generates error on "(a, b)"

error: closure tuple parameter '(offset: Int, element: Character)' does not support destructuring

Expected error on `a+b`

error: binary operator '+' cannot be applied to operands of type 'String' and 'Int'
@belkadan
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cc @xedin, @rudkx. Looks like our one-level destructuring doesn't kick in consistently.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation type checker Area → compiler: Semantic analysis
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@belkadan @swift-ci