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[SR-9729] Swift code compiling often crashes with multiple switch case fallthroughs and the same named associated values. #52163

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swift-ci opened this issue Jan 23, 2019 · 4 comments
Open

[SR-9729] Swift code compiling often crashes with multiple switch case fallthroughs and the same named associated values. #52163

swift-ci opened this issue Jan 23, 2019 · 4 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself crash Bug: A crash, i.e., an abnormal termination of software

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@swift-ci
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Previous ID SR-9729
Radar https://bugreport.apple.com/web/?problemID=47467128
Original Reporter forforester (JIRA User)
Type Bug

Attachment: Download

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

md5: 90f587d64c1ace1667cff94ced38d262

Issue Description:

Swift code compiling often crashes with multiple switch case fallthroughs and the same named associated values.

To reproduce the problem run (compile) the following code a few times:

enum Foo {
    case a(count: Int)
    case b(count: Int)
    case c(count: Int)
}

func bar(v: Foo) {
    switch v {
    case .a(let count): fallthrough
    case .b(let count): fallthrough
    case .c(let count):
        print(count)
    }
}
@belkadan
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Probably the same as SR-9698?

@swift-ci
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Comment by Serhiy Bouts (JIRA)

> Probably the same as SR-9698?

yes, SR-9698 apparently includes all the preconditions for the bug, described in my bug report, but mine is a more isolated case.

@belkadan
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@gottesmm, was this fixed by your recent reworking?

@swift-ci
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Comment by Daniel DeCovnick (JIRA)

Still crashing in Xcode 10.3 (10G8)

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added the crash Bug: A crash, i.e., an abnormal termination of software label Dec 12, 2022
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Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself crash Bug: A crash, i.e., an abnormal termination of software
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@belkadan @swift-ci @AnthonyLatsis