https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99234
--- Comment #11 from Liu Hao <lh_mouse at 126 dot com> --- My personally built GCC [1] didn't seem able to reproduce this, using exact the same options. The latest commit from GCC repo was 700dcc60b5646cc64ae3ba72a79a7542b4902b50. Were there any differences when building GCC itself? [1] https://github.com/lhmouse/MINGW-packages-dev/blob/master/mingw-w64-gcc-git/PKGBUILD