------- Comment #3 from janus at gcc dot gnu dot org 2009-10-21 16:02 ------- Here is a further reduced test case:
module A_mod type :: A end type end module module B_mod use A_mod type, extends(A) :: B end type end module module C_mod use B_mod type :: C end type C end module use C_mod, only: C end with a slightly different backtrace: Program received signal SIGSEGV, Segmentation fault. 0x00000000004ffcd5 in load_derived_extensions () at /home/jweil/gcc45/trunk/gcc/fortran/module.c:3997 3997 gcc_assert (derived->attr.flavor == FL_DERIVED); (gdb) bt #0 0x00000000004ffcd5 in load_derived_extensions () at /home/jweil/gcc45/trunk/gcc/fortran/module.c:3997 #1 0x0000000000500a26 in read_module () at /home/jweil/gcc45/trunk/gcc/fortran/module.c:4450 #2 0x0000000000502caf in gfc_use_module () at /home/jweil/gcc45/trunk/gcc/fortran/module.c:5500 #3 0x000000000050a5f8 in accept_statement (st=ST_USE) at /home/jweil/gcc45/trunk/gcc/fortran/parse.c:1525 #4 0x000000000050bb61 in parse_spec (st=ST_USE) at /home/jweil/gcc45/trunk/gcc/fortran/parse.c:2548 #5 0x000000000050d40a in parse_progunit (st=ST_USE) at /home/jweil/gcc45/trunk/gcc/fortran/parse.c:3758 #6 0x000000000050dee9 in gfc_parse_file () at /home/jweil/gcc45/trunk/gcc/fortran/parse.c:4192 #7 0x000000000054afa0 in gfc_be_parse_file (set_yydebug=0) at /home/jweil/gcc45/trunk/gcc/fortran/f95-lang.c:239 #8 0x00000000009b6efd in compile_file () at /home/jweil/gcc45/trunk/gcc/toplev.c:1049 #9 0x00000000009b91e9 in do_compile () at /home/jweil/gcc45/trunk/gcc/toplev.c:2408 #10 0x00000000009b92aa in toplev_main (argc=2, argv=0x7fffc79cfd78) at /home/jweil/gcc45/trunk/gcc/toplev.c:2450 #11 0x00000000005c8be7 in main (argc=2, argv=0x7fffc79cfd78) at /home/jweil/gcc45/trunk/gcc/main.c:35 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41784
