http://llvm.org/bugs/show_bug.cgi?id=9271
Summary: dependent decltype in parameter of template function
causes name mangling crash
Product: clang
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++0x
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
This code crashes in name mangling:
template<typename T> void f(T &&a, decltype(a) b);
int a;
int main() { f(a, a); }
The crash is caused by an infinite recursion: mangling the function name
f<int&> requires mangling the parameter types of the base template, and
mangling the type of b requires mangling the decltype expression, which
requires mangling a reference to f's parameter a, which erroneously requires
mangling the function name f<int&>.
The Itanium C++ ABI requires this to be mangled as:
_Z1fIRiE f<int&>
v void (
OT_ template-param-0 &&,
Dtfp_ decltype(function-param-0)
E )
It seems that clang's mangler doesn't know about the <function-param> "fp"
mangling.
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