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[SR-5224] Unable to detect infinite recursion defining lazy property #47799

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NachoSoto opened this issue Jun 14, 2017 · 4 comments
Open

[SR-5224] Unable to detect infinite recursion defining lazy property #47799

NachoSoto opened this issue Jun 14, 2017 · 4 comments
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@CodaFi
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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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@NachoSoto
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Previous ID SR-5224
Radar None
Original Reporter @NachoSoto
Type Bug
Environment

Swift version 3.1 (swiftlang-802.0.53 clang-802.0.42)
Swift version 4.0 (swiftlang-900.0.43 clang-900.0.22.8)

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

md5: 2b5a78dc211ca710b14782a64e21ae98

relates to:

  • SR-626 No diagnostic for unconditional recursion

Issue Description:

This just bit me for the 1 millionth time (similar to SR-4406).

class C {
  lazy var a: String = { 
    let a = "test"
    print(self.a) // Do something with self.a instead of a (in my case it was self.contentView.addSubview(self.view) instead of self.contentView.addSubview(view))
    
    return a 
  }()
}
@belkadan
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Slightly different than the others in that the current context isn't the getter itself.

@CodaFi
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CodaFi commented Aug 24, 2017

This one is also tricky because of the called closure value. This creates an inter-procedural cycle that the optimizer eventually turns into direct self-recursion.

@NachoSoto
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Hopefully this makes it in!

@NachoSoto
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Addressed by #11869 <3

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 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
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@NachoSoto @belkadan @CodaFi