http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57896
--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> --- Created attachment 30506 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30506&action=edit Slightly reduced testcase The bug disappears if we remove some unused typedefs, or the preprocessor line indications, or... valgrind doesn't report anything though. I have no idea what kind of corruption is going on.