[Bug fortran/91726] New: [8/9/10 Regression] ICE in gfc_conv_array_ref, at fortran/trans-array.c:3612

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91726

            Bug ID: 91726
           Summary: [8/9/10 Regression] ICE in gfc_conv_array_ref, at
                    fortran/trans-array.c:3612
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started with gcc-7 :


$ cat z1.f90
module m
   type t
      class(*), allocatable :: a[:]
   end type
end


$ gfortran-6 -c z1.f90 -fcoarray=single
$ gfortran-6 -c z1.f90 -fcoarray=lib
$
$ gfortran-10-20190908 -c z1.f90 -fcoarray=single
z1.f90:5:0:

    5 | end
      |
internal compiler error: in gfc_conv_array_ref, at fortran/trans-array.c:3612
0x6ce10a gfc_conv_array_ref(gfc_se*, gfc_array_ref*, gfc_expr*, locus*)
        ../../gcc/fortran/trans-array.c:3612
0x6f838e gfc_conv_variable
        ../../gcc/fortran/trans-expr.c:2790
0x6f4b6a gfc_conv_expr(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:8595
0x6f5d74 gfc_reset_vptr(stmtblock_t*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:432
0x73adbc gfc_trans_deallocate(gfc_code*)
        ../../gcc/fortran/trans-stmt.c:7327
0x6c4f97 trans_code
        ../../gcc/fortran/trans.c:2028
0x72ecd3 gfc_trans_if_1
        ../../gcc/fortran/trans-stmt.c:1448
0x7365ea gfc_trans_if(gfc_code*)
        ../../gcc/fortran/trans-stmt.c:1479
0x6c4ea7 trans_code
        ../../gcc/fortran/trans.c:1940
0x72ecd3 gfc_trans_if_1
        ../../gcc/fortran/trans-stmt.c:1448
0x7365ea gfc_trans_if(gfc_code*)
        ../../gcc/fortran/trans-stmt.c:1479
0x6c4ea7 trans_code
        ../../gcc/fortran/trans.c:1940
0x7379bd gfc_trans_simple_do
        ../../gcc/fortran/trans-stmt.c:2381
0x7379bd gfc_trans_do(gfc_code*, tree_node*)
        ../../gcc/fortran/trans-stmt.c:2514
0x6c4eca trans_code
        ../../gcc/fortran/trans.c:1952
0x6edb04 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6779
0x6c8b99 gfc_generate_module_code(gfc_namespace*)
        ../../gcc/fortran/trans.c:2250
0x677429 translate_all_program_units
        ../../gcc/fortran/parse.c:6241
0x677429 gfc_parse_file()
        ../../gcc/fortran/parse.c:6493
0x6c181f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204