https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79069
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Vanilla r244305, and ../configure --disable-bootstrap --enable-languages=c,c++,go,lto \ --with-long-double-128 --with-arch=z9-109 --with-tune=z10 make -j4 on s390x. Let me retry with latest trunk.