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[SR-11496] Enum with same name/different number of associated values: allowed, but crashes at runtime #53897

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swift-ci opened this issue Sep 20, 2019 · 1 comment
Open

[SR-11496] Enum with same name/different number of associated values: allowed, but crashes at runtime #53897

swift-ci opened this issue Sep 20, 2019 · 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

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@swift-ci
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Previous ID SR-11496
Radar None
Original Reporter voxar (JIRA User)
Type Bug
Environment

Swift version 5.1 (swiftlang-1100.0.270.13 clang-1100.0.33.7)

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

md5: fe53c9c5e3f114a14ba0cbf8d0edd311

relates to:

  • SR-11159 Typechecker crash on overloaded enum case

Issue Description:

enum Foo {
    case bar(Int)
    case bar(Int, Int)
}

// works
switch Foo.bar(1, 2) {
case let .bar(a): print("bar", a)
}

// crashes as runtime
switch Foo.bar(1) {
case let .bar(a): print("bar", a)
}

❌ Fatal error: unexpected enum case while switching on value of type 'Bar'
@belkadan
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Likely also handled by AndrewLitteken (JIRA User)'s work in SR-11159. (By rejecting the code at compile time, since all cases are not matched.)

@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
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@belkadan @swift-ci