[Bug fortran/77885] New: ICE in gfc_add_class_array_ref, at fortran/class.c:259

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77885

            Bug ID: 77885
           Summary: ICE in gfc_add_class_array_ref, at fortran/class.c:259
           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: ---

With invalid code, down to at least 4.8 :


$ cat z1.f90
program p
   type t
   end type
   class(t), pointer :: x => null()
   call s(x)
contains
   subroutine s(x)
      class(t) :: x[*]
   end
end


$ /home/gst/gcc/gcc-7-20161002-oyd/bin/gfortran -fcoarray=single z1.f90
z1.f90:5:0:

    call s(x)

internal compiler error: Segmentation fault
0xc29b8f crash_signal
        ../../gcc/toplev.c:337
0x670cfb gfc_add_class_array_ref(gfc_expr*)
        ../../gcc/fortran/class.c:259
0x761362 gfc_conv_procedure_call(gfc_se*, gfc_symbol*, gfc_actual_arglist*,
gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
        ../../gcc/fortran/trans-expr.c:5087
0x7a4dc4 gfc_trans_call(gfc_code*, bool, tree_node*, tree_node*, bool)
        ../../gcc/fortran/trans-stmt.c:407
0x7243fa trans_code
        ../../gcc/fortran/trans.c:1787
0x7538f8 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6257
0x6de270 translate_all_program_units
        ../../gcc/fortran/parse.c:5940
0x6de270 gfc_parse_file()
        ../../gcc/fortran/parse.c:6146
0x720e82 gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:198