https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79162
Xi Ruoyao <ryxi at stu dot xidian.edu.cn> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ryxi at stu dot xidian.edu.cn --- Comment #1 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> --- I think it's a C++ Standard Library defect rather than a libstdc++ bug. Seems similar to LWG 2758.