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[SR-7794] Swift 4.2 crash when dumping nested value #50333

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stephencelis opened this issue May 28, 2018 · 3 comments
Open

[SR-7794] Swift 4.2 crash when dumping nested value #50333

stephencelis opened this issue May 28, 2018 · 3 comments
Labels
access control Feature → modifiers: Access control and access levels 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 regression run-time crash Bug → crash: Swift code crashed during execution swift 4.2

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@stephencelis
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Previous ID SR-7794
Radar rdar://problem/40607819
Original Reporter @stephencelis
Type Bug
Environment

Swift 4.2 Xcode Snapshot, May 27, 2018

Additional Detail from JIRA
Votes 1
Component/s Compiler
Labels Bug, 4.2Regression, RunTimeCrash
Assignee None
Priority Medium

md5: 342e60e9a0d2ce65428081bbe444671b

Issue Description:

The following works in a Swift 4.1 playground but crashes in a Swift 4.2 playground.

func foo() {
  struct Foo { let bar: Int }
  let f = Foo(bar: 1)
  dump(f)
}
foo()
* thread #​1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x30)
    frame #​0: 0x000000010129d259 libswiftCore.dylib`outlined init with take of Any + 25
libswiftCore.dylib`outlined init with take of Any:
->  0x10129d259 <+25>: callq  *0x30(%rcx)
    0x10129d25c <+28>: movq   %rbx, %rax
    0x10129d25f <+31>: popq   %rbx
    0x10129d260 <+32>: retq
@weissi
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weissi commented May 29, 2018

@swift-ci create

@belkadan
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Seems to work outside of playgrounds with a recently-built compiler, so either it's regressed very recently or it's a playground-specific bug.

@jckarter
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I grabbed a master snapshot from swift.org and the playground still crashes. Like Jordan, I don't see any problem from the command line.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added regression swift 4.2 access control Feature → modifiers: Access control and access levels and removed 4.2 regression labels Nov 19, 2022
@AnthonyLatsis AnthonyLatsis added the crash Bug: A crash, i.e., an abnormal termination of software label Dec 12, 2022
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access control Feature → modifiers: Access control and access levels 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 regression run-time crash Bug → crash: Swift code crashed during execution swift 4.2
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@stephencelis @jckarter @weissi @belkadan @AnthonyLatsis