When compiled with -std=f2003 gfortran.dg/typebound_proc_16.f03 yields an ICE:
/opt/gcc/work/gcc/testsuite/gfortran.dg/typebound_proc_16.f03:18.49: PROCEDURE,PRIVATE :: rat_asgn_i, rat_plus_rat, rat_plus_i 1 Error: Fortran 2008: PROCEDURE list at (1) /opt/gcc/work/gcc/testsuite/gfortran.dg/typebound_proc_16.f03:22.29: GENERIC :: OPERATOR(+) => rat_plus_rat, rat_plus_i, i_plus_rat 1 Error: Undefined specific binding 'rat_plus_i' as target of GENERIC '+' at (1) f951: internal compiler error: Segmentation fault Backtrace: Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x0000007fffffffff gfc_check_operator_interface (sym=0x14190af40, op=INTRINSIC_ASSIGN, opwhere={nextc = 0x14191336c, lb = 0x1419132d0}) at ../../work/gcc/fortran/interface.c:572 572 gfc_symbol *fsym = formal->sym; (gdb) bt #0 gfc_check_operator_interface (sym=0x14190af40, op=INTRINSIC_ASSIGN, opwhere={nextc = 0x14191336c, lb = 0x1419132d0}) at ../../work/gcc/fortran/interface.c:572 #1 0x00000001000823e2 in resolve_fl_derived (sym=0x1419166a0) at ../../work/gcc/fortran/resolve.c:10427 #2 0x0000000100081eb9 in resolve_fl_derived (sym=0x141917200) at ../../work/gcc/fortran/resolve.c:10842 #3 0x0000000100080268 in resolve_symbol (sym=0x141917200) at ../../work/gcc/fortran/resolve.c:11506 #4 0x0000000100093d70 in traverse_ns (st=<value temporarily unavailable, due to optimizations>, func=0x10007f9e0 <resolve_symbol>) at ../../work/gcc/fortran/symbol.c:3357 #5 0x0000000100093d5e in traverse_ns (st=<value temporarily unavailable, due to optimizations>, func=0x10007f9e0 <resolve_symbol>) at ../../work/gcc/fortran/symbol.c:3354 #6 0x000000010007e0c5 in resolve_types (ns=0x142036600) at ../../work/gcc/fortran/resolve.c:12971 #7 0x0000000100077310 in gfc_resolve (ns=0x142036600) at ../../work/gcc/fortran/resolve.c:13067 #8 0x000000010006b2d3 in gfc_parse_file () at ../../work/gcc/fortran/parse.c:4392 #9 0x00000001000a51ec in gfc_be_parse_file (set_yydebug=<value temporarily unavailable, due to optimizations>) at ../../work/gcc/fortran/f95-lang.c:241 #10 0x000000010069a18a in toplev_main (argc=3, argv=0x7fff5fbfd958) at ../../work/gcc/toplev.c:945 #11 0x0000000100001814 in start () -- Summary: ICE on gfortran.dg/typebound_proc_16.f03 with -std=f2003 Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dominiq at lps dot ens dot fr http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45161