https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113272
--- Comment #2 from Fedor Chelnokov <fchelnokov at gmail dot com> ---
Here is simplified program without #include <concepts>:
template <auto>
struct A {};
template <auto p> requires requires(){ *p = 0; }
struct A<p> {};
int x = 0;
struct B : A<&x>, A<(const int *)&x> {};
GCC fails here because of
error: duplicate base type 'A<(& x)>' invalid
Online demo: https://godbolt.org/z/aan59E6WE
