[Bug c++/86000] ICE with requires statement in a non constexpr if

[gcc-bugs at oxyware dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86000

--- Comment #2 from Hubert Matthews <gcc-bugs at oxyware dot com> ---
template <typename T>
int f()
{
    bool check = requires { 3 > 4; };
    if (check) return 1;
    else return 2;
}

compiles cleanly and gives the expected result.  This is essentially the same
code but with the check performed separately and stored in an intermediate
variable.