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[SR-7249] Compiler crash for redeclaration in extension of generic type #49797

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hamishknight opened this issue Mar 21, 2018 · 1 comment
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bug A deviation from expected or documented behavior compiler crash A crash that happens during compilation Compiler

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@hamishknight
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hamishknight commented Mar 21, 2018

Previous ID SR-7249
Radar None
Original Reporter @hamishknight
Type Bug
Status Closed
Resolution Done
Environment

Swift version 4.2-dev (LLVM cef3fe6d75, Clang bdc970d89c, Swift 5b60ace)
Target: x86_64-apple-darwin17.4.0

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

md5: f79c841e907eb59984a6d43f8e0e7eee

Issue Description:

The following code crashes the compiler:

struct S<T> {
  var x: Int { return 0 }
}

extension S {
  var x: Int { return 0 }
}

It triggers an assertion in SILGen, but really Sema should catch this with an invalid redeclaration error.

@hamishknight
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hamishknight commented Mar 22, 2018

#15412

@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 compiler crash A crash that happens during compilation Compiler
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