Partial type-template specialization is not recognized correctly

Example:

struct b {};

template<class X, class Y>
struct s
{
	float f;
};

template<class X> // l.9
struct s<X, b>
{
	int i;
};

void f()
{
	s<int, b> var;
	(void)var.i;
}

This compiles on clang++, but Qt Creator suggests that var has only a member "f".

Note: Specializing the first parameter instead of the second does not work either:

template<class Y> struct s<int, Y> { /*...*/ };

Note: If you make line 9/10 a full specialization, Qt Creator recognizes everything correctly., i.e. this works:

template<> struct s<int, b> { /*...*/ };

Again, I'm not sure whether this is a bug or a wanted feature for saving runtime.