[Bug fortran/106857] New: [10/11/12/13 Regression] ICE in gfc_simplify_pack, at fortran/simplify.cc:6438

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106857

            Bug ID: 106857
           Summary: [10/11/12/13 Regression] ICE in gfc_simplify_pack, at
                    fortran/simplify.cc:6438
           Product: gcc
           Version: 13.0
            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 :: n
   end type
   type(t), parameter :: a(2,2) = t(1)
   type(t), parameter :: b(4) = reshape(a, [2])
   type(t), parameter :: c(2) = pack(b, [.false.,.true.,.false.,.true.])
end


$ gfortran-12-20211003 -c z1.f90
z1.f90:6:29:

    6 |    type(t), parameter :: b(4) = reshape(a, [2])
      |                             1
Error: Different shape for array assignment at (1) on dimension 1 (4 and 2)


$ gfortran-13-20220904 -c z1.f90
f951: internal compiler error: Segmentation fault
0xd8a29f crash_signal
        ../../gcc/toplev.cc:314
0x84695d gfc_simplify_pack(gfc_expr*, gfc_expr*, gfc_expr*)
        ../../gcc/fortran/simplify.cc:6438
0x7c2f2a do_simplify
        ../../gcc/fortran/intrinsic.cc:4677
0x7cde0a gfc_intrinsic_func_interface(gfc_expr*, int)
        ../../gcc/fortran/intrinsic.cc:5056
0x8230c8 resolve_unknown_f
        ../../gcc/fortran/resolve.cc:2990
0x8230c8 resolve_function
        ../../gcc/fortran/resolve.cc:3347
0x8230c8 gfc_resolve_expr(gfc_expr*)
        ../../gcc/fortran/resolve.cc:7194
0x7b2de4 gfc_reduce_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.cc:3163
0x7b5d70 gfc_match_init_expr(gfc_expr**)
        ../../gcc/fortran/expr.cc:3211
0x79ff6b variable_decl
        ../../gcc/fortran/decl.cc:3028
0x79ff6b gfc_match_data_decl()
        ../../gcc/fortran/decl.cc:6331
0x80b513 match_word
        ../../gcc/fortran/parse.cc:67
0x80b513 decode_statement
        ../../gcc/fortran/parse.cc:378
0x80cf5a next_free
        ../../gcc/fortran/parse.cc:1398
0x80cf5a next_statement
        ../../gcc/fortran/parse.cc:1630
0x80e4fb parse_spec
        ../../gcc/fortran/parse.cc:4169
0x8116bc parse_progunit
        ../../gcc/fortran/parse.cc:6211
0x812d81 gfc_parse_file()
        ../../gcc/fortran/parse.cc:6756
0x860b1f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.cc:229