Created attachment 143595 [details]
doxygen configuration

There are nested namespaces construction as follows (it is synthetic sample
prepared on real case), dox_crash.cpp:

namespace n2
{
    template <class A>
    class ClassName
    {
    public:
        typedef A adapter_type;
    };
}

namespace n1
{
    namespace n2
    {
        template <class SA>
        class ClassName :
            public ::n2::ClassName<typename SA::abstract_adapter_type>
        {
        };
    }
}

struct X
{
    typedef int abstract_adapter_type;
};

int main(void)
{
    n1::n2::ClassName<X> a;

    return 0;
}

It is compillable.

When the doxygen is used to document this file (see attached configuration), it
stay in phase "Computing class inheritance relations..." and it is allocating
memory up to around 3GiB, than crashes.

If the n1::n2::ClassName is changed to different name, it works fine.