https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102301
--- Comment #7 from 康桓瑋 <hewillk at gmail dot com> --- (In reply to Jonathan Wakely from comment #6) > Ugh, std::get is such a fragile and horrible API. Agreed, BTW PR 97512 was the first libstdc++ bug I reported, thank you for letting me back to the old days.