Assertion failed when accessing an inexistent field from port.

[luizademelo]

When running the iverilog command on this program:

module module_0 (
    id_2,
    id_3,
    id_18,
);
  inout id_18;
  input id_3;
  inout id_2;
  assign id_18 = id_3.id_2;
endmodule

iverilog crashes with the following output:

assert: elab_expr.cc:4964: failed assertion sr.path_tail.empty() Aborted