https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120358
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Sam James from comment #3) > Created attachment 61474 [details] > tst_qstringtokenizer.cpp.ii.xz Just a quick note -march=znver2 is needed to compile this preprocessed source. Even though -march=x86-64-v4 is mentioned in comment #0 :).