[Bug fortran/102817] New: [12 Regression] ICE in gfc_clear_shape, at fortran/expr.c:422

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102817

            Bug ID: 102817
           Summary: [12 Regression] ICE in gfc_clear_shape, at
                    fortran/expr.c:422
           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: ---

Started between 20211003 and 20211010 :


$ cat z1.f90
program p
   type t
      integer :: a(1,2) = 3
   end type
   type(t), parameter :: x(1) = t(4)
   integer :: y(1,2)
   y = (x(1)%a)
   print *, y
end


$ gfortran-12-20211003 -c z1.f90
$
$ gfortran-12-20211017 -c z1.f90
f951: internal compiler error: Segmentation fault
0xd47e4f crash_signal
        ../../gcc/toplev.c:322
0x798d1b gfc_clear_shape(__mpz_struct (*) [1], int)
        ../../gcc/fortran/expr.c:422
0x798d1b gfc_free_shape(__mpz_struct (**) [1], int)
        ../../gcc/fortran/expr.c:432
0x798e3d free_expr0
        ../../gcc/fortran/expr.c:513
0x798ff0 gfc_replace_expr(gfc_expr*, gfc_expr*)
        ../../gcc/fortran/expr.c:626
0x79c768 simplify_const_ref
        ../../gcc/fortran/expr.c:1999
0x79ce5e gfc_simplify_expr(gfc_expr*, int)
        ../../gcc/fortran/expr.c:2312
0x79d0ab simplify_parameter_variable
        ../../gcc/fortran/expr.c:2141
0x79ce2d gfc_simplify_expr(gfc_expr*, int)
        ../../gcc/fortran/expr.c:2279
0x79c9a6 simplify_intrinsic_op
        ../../gcc/fortran/expr.c:1188
0x79c9a6 gfc_simplify_expr(gfc_expr*, int)
        ../../gcc/fortran/expr.c:2268
0x80bb79 resolve_operator
        ../../gcc/fortran/resolve.c:4470
0x80807f gfc_resolve_expr(gfc_expr*)
        ../../gcc/fortran/resolve.c:7136
0x810aa4 gfc_resolve_expr(gfc_expr*)
        ../../gcc/fortran/resolve.c:11806
0x810aa4 gfc_resolve_code(gfc_code*, gfc_namespace*)
        ../../gcc/fortran/resolve.c:11908
0x812097 resolve_codes
        ../../gcc/fortran/resolve.c:17512
0x81215e gfc_resolve(gfc_namespace*)
        ../../gcc/fortran/resolve.c:17547
0x7fa494 resolve_all_program_units
        ../../gcc/fortran/parse.c:6519
0x7fa494 gfc_parse_file()
        ../../gcc/fortran/parse.c:6771
0x8476bf gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:216