The following code sample does not compile, and it should.
I get the error:
gpp_bug_1.cpp: In constructor `B<X>::B()':
gpp_bug_1.cpp:10: error: expected `;' before "x"

G++ version: g++ (GCC) 4.4.0 20080729 (experimental)

template<class X> class A{
public:
	typedef X type_t;
};

template<class X> class B: A<X>{
public:
	using typename A<X>::type_t;
	B(){type_t x;}
};

int main_(int argc, char *argv[]){
	return 1;
}