https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96041
--- Comment #1 from anlauf at gcc dot gnu.org --- (In reply to Bill Seurer from comment #0) > f951: internal compiler error: Segmentation fault > 0x10be671b crash_signal > /home/seurer/gcc/git/gcc-test/gcc/toplev.c:328 > 0x103a6484 free_st_labels > /home/seurer/gcc/git/gcc-test/gcc/fortran/symbol.c:2662 > 0x103a648f free_st_labels > /home/seurer/gcc/git/gcc-test/gcc/fortran/symbol.c:2662 > 0x103a648f free_st_labels > /home/seurer/gcc/git/gcc-test/gcc/fortran/symbol.c:2662 > 0x103afd63 gfc_free_namespace(gfc_namespace*) > /home/seurer/gcc/git/gcc-test/gcc/fortran/symbol.c:4044 Bill, can you set a breakpoint at symbol.c:4044 and print ns->st_labels? On x86_64 I always have a NULL pointer here, so that symbol.c:2662 is never reached.