[Bug c++/87616] Compiler segfaults on dependent templated friend

[mickg at mickg dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87616

--- Comment #2 from Michael Gorbovitski <mickg at mickg dot net> ---
Slightly simplified test case (no need for double-argument template):

struct foo{};
template <class A> struct friender {
    using cls=foo;
};

class bar {
    template <class X>
    friend class friender<X>::cls;
    int hidden;
};


int main() {
    bar b;
}