http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55558
Bug #: 55558
Summary: [C++11] decltype on a static member variable of a
specialized class in a template function results in an
internal compiler error
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: dev...@gmx.net
The following piece of code:
template<class T> class A
{
};
class B
{
};
template<> class A<B>
{
public:
static int member;
};
template<typename T> void foobar ()
{
typedef decltype (A<B>::member) myType;
}
produces the following error:
test.cpp: In function 'void foobar()':
test.cpp:17:32: internal compiler error: in finish_decltype_type, at
cp/semantics.c:5274
I accidently used the actual class B instead of the template parameter T in the
foobar function and stumbled upon this error. The error is NOT reproducible
when at least ONE of the following points applies:
- the member variable 'member' is not static
- 'foobar' is not a template method
- the expression inside the decltype statement is inside another expression,
e.g. a function call or as an operand to an operator
The typedef expression is not relevant for the error, it also happens when the
decltype expression is used to declare a variable or as a template parameter.
