https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41418
--- Comment #31 from LIU Hao <lh_mouse at 126 dot com> ---
I can confirm that the patch fixes bootstrap issues on
{i686,x86_64}-w64-mingw32 with
--enable-languages=c,c++,fortran,lto,objc,obj-c++,jit.
