http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48952
--- Comment #1 from Andi Kleen <andi-gcc at firstfloor dot org> 2011-05-10 16:37:17 UTC --- Some more information from gdb. So it follows some pointer in the VEC that is NULL (gdb) p edge $1 = (struct cgraph_edge *) 0x7f1ce05d90d0 (gdb) p edge->uid $2 = 38701 (gdb) disp/3i $pc 1: x/3i $pc => 0x859bdc <inline_merge_summary+188>: mov 0x8(%rbx,%rdx,1),%ecx 0x859be0 <inline_merge_summary+192>: test %ecx,%ecx 0x859be2 <inline_merge_summary+194>: je 0x859cdb <inline_merge_summary+443> (gdb) p $rbx $3 = 0 (gdb) p $rdx $4 = 619216 (gdb)