http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57625
--- Comment #1 from Mikael Pettersson <mikpe at it dot uu.se> --- I can't reproduce with FSF gcc 4.8.1 and 4.7.2 on Fedora 17 x86_64. Your archlinux system compiler is presumably somewhat modified; can you try again with an FSF 4.8.1? Also please make sure the 4.7.2 you're building is unmodified.