[Bug fortran/77518] New: ICE in gfc_advance_chain, at fortran/trans.c:58

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77518

            Bug ID: 77518
           Summary: ICE in gfc_advance_chain, at fortran/trans.c:58
           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: ---

Compiles with 4.8/4.9, aborts with versions 5/6/7 :


$ cat z1.f90
program p
   type t
   end type
   class(t), allocatable :: z[:]
   print *, sizeof(z)
end


$ gfortran-7-20160904 -fcoarray=single z1.f90
z1.f90:5:0:

    print *, sizeof(z)

internal compiler error: in gfc_advance_chain, at fortran/trans.c:58
0x72227b gfc_advance_chain(tree_node*, int)
        ../../gcc/fortran/trans.c:58
0x755d5f gfc_class_vptr_get(tree_node*)
        ../../gcc/fortran/trans-expr.c:149
0x756778 class_vtab_field_get
        ../../gcc/fortran/trans-expr.c:222
0x756778 gfc_class_vtab_size_get(tree_node*)
        ../../gcc/fortran/trans-expr.c:255
0x77b8e9 gfc_conv_intrinsic_sizeof
        ../../gcc/fortran/trans-intrinsic.c:6006
0x783d6b gfc_conv_intrinsic_function(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-intrinsic.c:8276
0x760f72 gfc_conv_expr(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:7602
0x767ca8 gfc_conv_expr_reference(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:7737
0x78aa06 gfc_trans_transfer(gfc_code*)
        ../../gcc/fortran/trans-io.c:2459
0x7227d7 trans_code
        ../../gcc/fortran/trans.c:1886
0x787828 build_dt
        ../../gcc/fortran/trans-io.c:1958
0x7227f7 trans_code
        ../../gcc/fortran/trans.c:1858
0x7517a8 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6224
0x6dd050 translate_all_program_units
        ../../gcc/fortran/parse.c:5911
0x6dd050 gfc_parse_file()
        ../../gcc/fortran/parse.c:6117
0x71f602 gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:198