[Bug c++/70353] [5/6 regression] ICE on __PRETTY_FUNCTION__ in a constexpr function

[mrlika at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70353

--- Comment #8 from Andriy Lysnevych <mrlika at gmail dot com> ---
Smaller test case:

constexpr const char* ce ()
{
   return __func__;
}

const char* c = ce ();