[Bug fortran/78592] New: ICE in gfc_find_specific_dtio_proc, at fortran/interface.c:4939

[gerhard.steinmetz.fortran@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78592

            Bug ID: 78592
           Summary: ICE in gfc_find_specific_dtio_proc, at
                    fortran/interface.c:4939
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gerhard.steinmetz.fortran@t-online.de
  Target Milestone: ---

Affects version 7 (configured with --enable-checking=yes)
since about 20160904 :


$ cat z1.f90
program p
   type t
   end type
   type(t) :: z
   interface write(formatted)
      module procedure wf
   end interface
   print *, z
end


$ gfortran-7-20161127 z1.f90
z1.f90:6:23:

       module procedure wf
                       1
Error: Procedure 'wf' in generic interface '_dtio_formatted_write' at (1) is
neither function nor subroutine
f951: internal compiler error: Segmentation fault
0xc4532f crash_signal
        ../../gcc/toplev.c:333
0x69ff6d gfc_find_specific_dtio_proc(gfc_symbol*, bool, bool)
        ../../gcc/fortran/interface.c:4939
0x6fa32b resolve_transfer
        ../../gcc/fortran/resolve.c:8973
0x6fa32b gfc_resolve_code(gfc_code*, gfc_namespace*)
        ../../gcc/fortran/resolve.c:11138
0x6f8c07 gfc_resolve_blocks(gfc_code*, gfc_namespace*)
        ../../gcc/fortran/resolve.c:9865
0x6f903b gfc_resolve_code(gfc_code*, gfc_namespace*)
        ../../gcc/fortran/resolve.c:10808
0x6fba22 resolve_codes
        ../../gcc/fortran/resolve.c:16025
0x6fbb1e gfc_resolve(gfc_namespace*)
        ../../gcc/fortran/resolve.c:16060
0x6e609a resolve_all_program_units
        ../../gcc/fortran/parse.c:5977
0x6e609a gfc_parse_file()
        ../../gcc/fortran/parse.c:6224
0x729ee2 gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:202