Comment 2 for bug 1842164

Without a program statement :

$ cat z1.f90
integer(len((c)) :: n
end

$ gfortran-9-20181216 -c z1.f90
$ gfortran-9-20181216 -c z1.f90 -fimplicit-none
z1.f90:1:0:

    1 | integer(len((c)) :: n
      |
internal compiler error: in gfc_typenode_for_spec, at fortran/trans-types.c:1120
0x78e59d gfc_typenode_for_spec(gfc_typespec*, int)
        ../../gcc/fortran/trans-types.c:1120
0x78c1f6 gfc_sym_type(gfc_symbol*)
        ../../gcc/fortran/trans-types.c:2243
0x71af9e gfc_get_symbol_decl(gfc_symbol*)
        ../../gcc/fortran/trans-decl.c:1696
0x71ea47 generate_local_decl
        ../../gcc/fortran/trans-decl.c:5600
0x6d3d12 do_traverse_symtree
        ../../gcc/fortran/symbol.c:4151
0x71ff9c generate_local_vars
        ../../gcc/fortran/trans-decl.c:5800
0x71ff9c gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6444
0x69d7c6 translate_all_program_units
        ../../gcc/fortran/parse.c:6128
0x69d7c6 gfc_parse_file()
        ../../gcc/fortran/parse.c:6331
0x6e6fcf gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204

---

Invalid syntax also silently accepted :

$ cat z3.f90
integer(m::n
end

$ gfortran-9-20181216 -c z3.f90
$ gfortran-9-20181216 -c z3.f90 -fimplicit-none
z3.f90:1:0:

    1 | integer(m::n
      |
internal compiler error: in gfc_typenode_for_spec, at fortran/trans-types.c:1120
#...