Crashes when typing code

While typing C++ code QtCreator crashes. The stack trace of the crash is attached. The crashed thread seems to be in infinite recursion as I saw thousands of similar stack frames below those in the attached report.

The code that causes this is rather large and I couldn't create a minimal code sample to reproduce. But my code is similar to the following.

{{
namespace NS {

template< typename T >
struct A
{
typedef T char_type;

virtual ~A() {}

virtual void foo() = 0;
};

template< typename T >
struct B
{
typedef T char_type;

virtual ~B() {}

virtual void foo() = 0;
};

template< typename T >
struct C :
public A< T >,
public B< T >

}}

When I type my struct whict is equivalent to C in this example (in particular, when I type its base classes) QtCreator crashes. This minimal code sample doesn't crash, so probably the surrounding code and headers also influence this.