https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109338
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Testcase:
```
template <class T, class U>
concept C = true;
template <class T>
struct A {};
void f(A<C<int> auto >) {}
```
Please place the testcase in the comment or attach it; don't just link to
godbolt.
