http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51642
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-23 13:07:17 UTC --- No idea what fixed it, so I don't know - I don't even know where it segfaults. I suspect the change to make -fuse-linker-plugin the default maybe had an effect?