[Bug fortran/104211] New: ICE in find_array_section, at fortran/expr.cc:1720

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104211

            Bug ID: 104211
           Summary: ICE in find_array_section, at fortran/expr.cc:1720
           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
   type t
      real :: n
   end type
   type(t), parameter :: a(3) = [t(2)]
   type(t), parameter :: b(2) = a(2:3)
end


$ cat z2.f90
program p
   type t
      real :: n
   end type
   type(t), parameter :: a(3) = [t(2)]
   type(t), parameter :: b(2) = [a(2:3)]
end


$ gfortran-12-20220123 -c z1.f90
f951: internal compiler error: in find_array_section, at fortran/expr.cc:1720
0x6f0d75 find_array_section
        ../../gcc/fortran/expr.cc:1720
0x6f231a simplify_const_ref
        ../../gcc/fortran/expr.cc:1925
0x6f2e4e gfc_simplify_expr(gfc_expr*, int)
        ../../gcc/fortran/expr.cc:2316
0x6f30bb simplify_parameter_variable
        ../../gcc/fortran/expr.cc:2145
0x6f2007 gfc_reduce_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.cc:3156
0x6f4f70 gfc_match_init_expr(gfc_expr**)
        ../../gcc/fortran/expr.cc:3202
0x6df324 variable_decl
        ../../gcc/fortran/decl.cc:3004
0x6df324 gfc_match_data_decl()
        ../../gcc/fortran/decl.cc:6299
0x749933 match_word
        ../../gcc/fortran/parse.cc:67
0x749933 decode_statement
        ../../gcc/fortran/parse.cc:378
0x74b37a next_free
        ../../gcc/fortran/parse.cc:1397
0x74b37a next_statement
        ../../gcc/fortran/parse.cc:1629
0x74c90b parse_spec
        ../../gcc/fortran/parse.cc:4168
0x74fa5c parse_progunit
        ../../gcc/fortran/parse.cc:6192
0x751121 gfc_parse_file()
        ../../gcc/fortran/parse.cc:6737
0x79e86f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.cc:216