http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49282
--- Comment #1 from Andi Kleen <andi-gcc at firstfloor dot org> 2011-06-04 19:56:15 UTC --- Some updates: I tried with a fresh compiler (20110604). Same malloc assert I also checked with a somewhat older compiler (from around May 11) It segfaulted eventually too, so I suspect the problem has been there for longer.