[Bug fortran/95981] New: ICE in gfc_find_array_ref(): No ref found

["gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95981

            Bug ID: 95981
           Summary: ICE in gfc_find_array_ref(): No ref found
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Affects also versions down to at least r5.
With a missing attribute allocatable or pointer :


$ cat z1.f90
program p
   type t
   end type
   class(t) :: x(:)
   type(t) :: y(size(x,1))
end


$ gfortran-11-20200628 -c z1.f90
f951: internal compiler error: gfc_find_array_ref(): No ref found
0x657489 gfc_report_diagnostic
        ../../gcc/fortran/error.c:782
0x658baa gfc_internal_error(char const*, ...)
        ../../gcc/fortran/error.c:1402
0x628e4c gfc_find_array_ref(gfc_expr*, bool)
        ../../gcc/fortran/array.c:2750
0x629f7a dim_rank_check
        ../../gcc/fortran/check.c:1145
0x6317fc dim_rank_check
        ../../gcc/fortran/check.c:5140
0x6317fc gfc_check_size(gfc_expr*, gfc_expr*, gfc_expr*)
        ../../gcc/fortran/check.c:5135
0x66cf6c do_check
        ../../gcc/fortran/intrinsic.c:4749
0x66cf6c check_specific
        ../../gcc/fortran/intrinsic.c:4762
0x677264 gfc_intrinsic_func_interface(gfc_expr*, int)
        ../../gcc/fortran/intrinsic.c:4999
0x6c52d3 resolve_unknown_f
        ../../gcc/fortran/resolve.c:2902
0x6c52d3 resolve_function
        ../../gcc/fortran/resolve.c:3246
0x6c52d3 gfc_resolve_expr(gfc_expr*)
        ../../gcc/fortran/resolve.c:7037
0x64a4af variable_decl
        ../../gcc/fortran/decl.c:2595
0x64a4af gfc_match_data_decl()
        ../../gcc/fortran/decl.c:6197
0x6ae0a3 match_word
        ../../gcc/fortran/parse.c:65
0x6ae0a3 decode_statement
        ../../gcc/fortran/parse.c:376
0x6afaea next_free
        ../../gcc/fortran/parse.c:1280
0x6afaea next_statement
        ../../gcc/fortran/parse.c:1512
0x6b113b parse_spec
        ../../gcc/fortran/parse.c:3923
0x6b3f0c parse_progunit
        ../../gcc/fortran/parse.c:5852