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SegFault with __builtin_bit_cast to templated type and auto return type #42281

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llvmbot opened this issue Aug 8, 2019 · 2 comments
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SegFault with __builtin_bit_cast to templated type and auto return type #42281

llvmbot opened this issue Aug 8, 2019 · 2 comments
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bugzilla Issues migrated from bugzilla clang:frontend Language frontend issues, e.g. anything involving "Sema"

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@llvmbot
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llvmbot commented Aug 8, 2019

Bugzilla Link 42936
Resolution FIXED
Resolved on Aug 12, 2019 11:31
Version trunk
OS All
Reporter LLVM Bugzilla Contributor
CC @zygoloid
Fixed by commit(s) r368600

Extended Description

template struct S { int x;};
auto f() {
int t = 5;
return __builtin_bit_cast(S, t);
}

Error:

  1. :8:41: current parser token ';'
  2. :6:10: parsing function body 'f'
  3. :6:10: in compound statement ('{}')

#​4 0x0000557591fc2a05 clang::ASTContext::getASTRecordLayout(clang::RecordDecl const*) const (/opt/compiler-explorer/clang-trunk-20190808/bin/clang-10+0x47d8a05)
clang-10: error: unable to execute command: Segmentation fault (core dumped)

https://godbolt.org/z/4sPmp2
@zygoloid
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Mannequin

zygoloid mannequin commented Aug 8, 2019

Reduced slightly:

template struct S { int x;};
S x = __builtin_bit_cast(S, 0);

Looks like we're missing a RequireCompleteType call?

@llvmbot
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llvmbot commented Aug 12, 2019

Fixed in 368600.

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 10, 2021
This issue was closed.
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bugzilla Issues migrated from bugzilla clang:frontend Language frontend issues, e.g. anything involving "Sema"
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