http://llvm.org/bugs/show_bug.cgi?id=19623
Bug ID: 19623
Summary: Assertion with template alias and gdwarf-2
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 12463
--> http://llvm.org/bugs/attachment.cgi?id=12463&action=edit
Log of clang run
The following program crashes clang r207398 when compiling with -gdwarf-2:
template <bool>
struct enable_if { };
template <>
struct enable_if<true> { using type = void; };
template <bool C>
using enable_if_t = typename enable_if<C>::type;
template <unsigned int M, enable_if_t<M == 1>* = nullptr> // A
//template <unsigned int M, typename enable_if<M == 1>::type* = nullptr> // B
static void foo() {}
int main()
{
foo<1>();
}
This results in (full log attached):
% ~/LLVM/build/Release+Asserts/bin/clang++ -std=c++11 -gdwarf-2 clang.cpp
Assertion failed: (Src), function CreateType, file
/Users/rynnsauer/LLVM/llvm/tools/clang/lib/CodeGen/CGDebugInfo.cpp, line 725.
0 clang 0x00000001066b7388
llvm::sys::PrintStackTrace(__sFILE*) + 40
1 clang 0x00000001066b7884 SignalHandler(int) + 548
2 libsystem_platform.dylib 0x00007fff96f565aa _sigtramp + 26
3 libsystem_platform.dylib 000000000000000000 _sigtramp + 1762302576
4 clang 0x00000001066b7646 abort + 22
5 clang 0x00000001066b7621 __assert_rtn + 81
6 clang 0x00000001050c551a
clang::CodeGen::CGDebugInfo::CreateType(clang::TemplateSpecializationType
const*, llvm::DIFile) + 682
7 clang
When compiling with line B instead of line A (using enable_if directly instead
of via a template alias), the code compiles successfully.
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