http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46286
--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> 2010-11-03 07:37:54 UTC --- I did some debugging and found out that I only see the ICE on x86-64-linux if I use: export MALLOC_PERTURB_=$(($RANDOM % 255 + 1)) (current value: 191) If I do not set that variable, xgcc compiles gcc/sched-rgn.c without an ICE. I tried valgrind, but it shows no error.