[Bug c++/111660] Compilation of constexpr function returning enum takes exponential time with -std=c++2a

[envia at envia dot pe.kr via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111660

--- Comment #1 from Hwang Joonhyung <envia at envia dot pe.kr> ---
Created attachment 56025
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56025&action=edit
It took 138 seconds.