[Bug fortran/78259] New: ICE in gfc_trans_subcomponent_assign, at fortran/trans-expr.c:7330

["gerhard dot steinmetz dot fortran at t-online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78259

            Bug ID: 78259
           Summary: ICE in gfc_trans_subcomponent_assign, at
                    fortran/trans-expr.c:7330
           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: ---

Test version 7 (--enable-checking=yes) with option -fdec :


$ cat z1.f90
subroutine sub
  structure /s/
    union
      map
        integer n(2)
      end map
      map
        integer(8) m /2/
      end map
    end union
  end structure
  record /s/ r
  r.n(1) = 1
end


$ gfortran-7-20161106 -fdec -c z1.f90
z1.f90:14:0:

 end

internal compiler error: Segmentation fault
0xc3a64f crash_signal
        ../../gcc/toplev.c:338
0x76e8d1 gfc_trans_subcomponent_assign
        ../../gcc/fortran/trans-expr.c:7330
0x76db12 gfc_trans_structure_assign(tree_node*, gfc_expr*, bool)
        ../../gcc/fortran/trans-expr.c:7482
0x76fd52 gfc_conv_structure(gfc_se*, gfc_expr*, int)
        ../../gcc/fortran/trans-expr.c:7548
0x76852c gfc_conv_expr(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:7715
0x771b99 gfc_trans_assignment_1
        ../../gcc/fortran/trans-expr.c:9730
0x74cbb0 gfc_init_default_dt(gfc_symbol*, stmtblock_t*, bool)
        ../../gcc/fortran/trans-decl.c:3924
0x756a9d gfc_trans_deferred_vars(gfc_symbol*, gfc_wrapped_block*)
        ../../gcc/fortran/trans-decl.c:4530
0x758e53 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6363
0x6e1d90 translate_all_program_units
        ../../gcc/fortran/parse.c:5944
0x6e1d90 gfc_parse_file()
        ../../gcc/fortran/parse.c:6144
0x725822 gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:198