[Issue 22737] Segmentation fault in CppMangleVisitor.getTiNamespace

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22737

--- Comment #4 from Tim <tim.dlang at t-online.de> ---
In my original code this happened for a utility function, which did not come
from C++. I used extern(C++): for the whole file, so the utility function also
got it, but I have solve it by making this function extern(D).

The following code should be equivalent C++:

==================================================
template <class T>
using Identity = T;

template <class T>
Identity<T> identity(T val)
{
    return Identity<T>(val);
}

int main()
{
    int x = identity(5);
    return 0;
}
==================================================

Making this issue accepts-invalid would also work for me, because templates
with alias can probably just be marked as extern(D).

--