[Bug fortran/104849] New: ICE in find_array_section, at fortran/expr.cc:1616

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104849

            Bug ID: 104849
           Summary: ICE in find_array_section, at fortran/expr.cc:1616
           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: ---

Affects versions down to at least r5 :


$ cat z1.f90
program p
   integer, parameter :: a(:) = [1, 2]
   integer :: x(2)
   data x /a(:)/
end


$ cat z2.f90
program p
   character(3), parameter :: a(:) = ['123']
   character(3) :: x(1)
   data x /a(:)/
end


$ cat z3.f90
program p
   character, parameter :: c(:) = ['1', '2', '3']
   type t
      integer :: a
      character :: b(3)
   end type
   type(t) :: x = t(1, c(:))
end


$ gfortran-12-20220306 -c z1.f90
f951: internal compiler error: Segmentation fault
0xccad7f crash_signal
        ../../gcc/toplev.cc:322
0x6f39cc find_array_section
        ../../gcc/fortran/expr.cc:1616
0x6f537a simplify_const_ref
        ../../gcc/fortran/expr.cc:1932
0x6f5eae gfc_simplify_expr(gfc_expr*, int)
        ../../gcc/fortran/expr.cc:2323
0x6f611b simplify_parameter_variable
        ../../gcc/fortran/expr.cc:2152
0x6f5067 gfc_reduce_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.cc:3163
0x6f7fd0 gfc_match_init_expr(gfc_expr**)
        ../../gcc/fortran/expr.cc:3209
0x6d8212 match_data_constant
        ../../gcc/fortran/decl.cc:461
0x6d8353 top_val_list
        ../../gcc/fortran/decl.cc:499
0x6d8662 gfc_match_data()
        ../../gcc/fortran/decl.cc:716
0x748681 match_word
        ../../gcc/fortran/parse.cc:67
0x74d87e decode_statement
        ../../gcc/fortran/parse.cc:471
0x74e5ea next_free
        ../../gcc/fortran/parse.cc:1397
0x74e5ea next_statement
        ../../gcc/fortran/parse.cc:1629
0x74fb7b parse_spec
        ../../gcc/fortran/parse.cc:4168
0x752ccc parse_progunit
        ../../gcc/fortran/parse.cc:6192
0x754391 gfc_parse_file()
        ../../gcc/fortran/parse.cc:6737
0x7a1edf gfc_be_parse_file
        ../../gcc/fortran/f95-lang.cc:216