[Bug c++/103341] [11/12 Regression] ICE type of variable instantiation constrained on template parameter

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103341

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced with an extra testcase from PR 103706:
template<class T, class U> concept C =  sizeof(T) == sizeof(int);
template<class T> inline constexpr C<T> auto trait_v{1};
decltype(trait_v<int>) t = 1;
template<typename T> void g5() {
[]() -> C<T> auto{ return T();  }();
}
template void g5<int>();