https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64972
--- Comment #2 from Rainer Emrich <rai...@emrich-ebersheim.de> --- Issue exists for target x86_64-w64-mingw32 too. By the way, this is a regression. At the moment gcc doesn't build for the *-w64-mingw32 targets.
