[Bug c++/116511] [14/15 Regression] ICE with enum value used in requires

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116511

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced and cleaned up some more:
```
template <int> 
struct s1 {
  enum { e1 = 1 };
};
template <int t2>
struct s2 {
  enum { e1 = s1<t2>::e1 };
  s2() requires(0 != e1);
};

s2<8> a;
```