Following program cause internal compiler error. I wasn't sure if this has been seen/filed before.
$ cat test_module.f90 module test_module contains subroutine sub_module(str) external :: str end subroutine sub_module subroutine str() end subroutine str end module test_module $ gfortran -v -c test_module.f90 test_module.f90:0: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Using built-in specs. Target: powerpc64-linux Configured with: /home/gccbuild/gcc_trunk_anonsvn/trunk/configure --prefix=/opt/gcc-nightly/trunk-20051110 --build=powerpc64-linux --host=powerpc64-linux --target=powerpc64-linux --with-cpu=default32 --with-as=/opt/gcc-nightly/trunk-20051110/bin/as --with-ld=/opt/gcc-nightly/trunk-20051110/bin/ld --enable-threads=posix --enable-shared --enable-__cxa_atexit --enable-languages=c,c++,f95,java,objc,obj-c++ --enable-checking --with-mpfr=/opt/gcc-nightly/trunk-20051110 Thread model: posix gcc version 4.1.0 20051110 (experimental) /home/gcc-nightly/trunk-20051110/bin/../libexec/gcc/powerpc64-linux/4.1.0/f951 test_module.f90 -quiet -dumpbase test_module.f90 -auxbase test_module -version -o /tmp/ccUJBiuf.s GNU F95 version 4.1.0 20051110 (experimental) (powerpc64-linux) compiled by GNU C version 4.1.0 20051110 (experimental). GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 backtrace is 142 if (sym->result->ts.type == BT_UNKNOWN) (gdb) p sym $1 = (gfc_symbol *) 0x1075be20 (gdb) p sym->result $2 = (struct gfc_symbol *) 0x0 (gdb) bt #0 resolve_formal_arglist (proc=0x1075bda0) at /home/gccbuild/gcc_trunk_anonsvn/trunk/gcc/fortran/resolve.c:142 #1 0x10059c70 in traverse_ns (st=0x107408b0, func=0x1004a310 <find_arglists>) at /home/gccbuild/gcc_trunk_anonsvn/trunk/gcc/fortran/symbol.c:2416 #2 0x1004f008 in gfc_resolve (ns=0x1075b670) at /home/gccbuild/gcc_trunk_anonsvn/trunk/gcc/fortran/resolve.c:267 #3 0x24000482 in ?? () #4 0x10045244 in gfc_parse_file () at /home/gccbuild/gcc_trunk_anonsvn/trunk/gcc/fortran/parse.c:2664 #5 0x10064e04 in gfc_be_parse_file (set_yydebug=Variable "set_yydebug" is not available. ) at /home/gccbuild/gcc_trunk_anonsvn/trunk/gcc/fortran/f95-lang.c:286 #6 0x10340a5c in toplev_main (argc=Variable "argc" is not available. ) at /home/gccbuild/gcc_trunk_anonsvn/trunk/gcc/toplev.c:990 #7 0x10092540 in main (argc=Variable "argc" is not available. ) at /home/gccbuild/gcc_trunk_anonsvn/trunk/gcc/main.c:35 -- Summary: internal compiler error Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: uttamp at us dot ibm dot com GCC build triplet: powerpc64-linux GCC host triplet: powerpc64-linux GCC target triplet: powerpc64-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24866