[Bug fortran/100948] New: [12 Regression] ICE in gfc_conv_expr_val, at fortran/trans-expr.c:9069

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100948

            Bug ID: 100948
           Summary: [12 Regression] ICE in gfc_conv_expr_val, at
                    fortran/trans-expr.c:9069
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

This changed between 20210530 (accepted) and 20210606 (ICE) :
(see also pr83522)


$ cat z1.f90
program p
   type t
      character(:), allocatable :: c(:)
   end type
   type(t), allocatable :: x
   associate (y => x%c(:)(:))
   end associate
end


$ gfortran-12-20210530 -c z1.f90
$
$ gfortran-12-20210606 -c z1.f90
z1.f90:6:29:

    6 |    associate (y => x%c(:)(:))
      |                             1
internal compiler error: Segmentation fault
0xc79a6f crash_signal
        ../../gcc/toplev.c:327
0x7cf4f6 gfc_conv_expr_val(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:9069
0x7cf723 gfc_conv_expr_type(gfc_se*, gfc_expr*, tree_node*)
        ../../gcc/fortran/trans-expr.c:9084
0x7cf723 gfc_get_expr_charlen(gfc_expr*)
        ../../gcc/fortran/trans-expr.c:2158
0x7a11bf gfc_get_array_span(tree_node*, gfc_expr*)
        ../../gcc/fortran/trans-array.c:873
0x7acab0 gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-array.c:7740
0x80d462 trans_associate_var
        ../../gcc/fortran/trans-stmt.c:1917
0x8141f1 gfc_trans_block_construct(gfc_code*)
        ../../gcc/fortran/trans-stmt.c:2311
0x79e5a7 trans_code
        ../../gcc/fortran/trans.c:2014
0x7c4bc4 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6893
0x74b3f6 translate_all_program_units
        ../../gcc/fortran/parse.c:6461
0x74b3f6 gfc_parse_file()
        ../../gcc/fortran/parse.c:6730
0x79772f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:212