https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58889
--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> --- It seems to be fixed in GCC.4.9.0 https://godbolt.org/z/MbqPzeTEP
crazylht at gmail dot com via Gcc-bugs Thu, 16 Sep 2021 21:39:00 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58889
--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> --- It seems to be fixed in GCC.4.9.0 https://godbolt.org/z/MbqPzeTEP