Don't allow array parameter in Struct.new

mrbgems/mruby-struct/src/struct.c

@@ -273,25 +273,15 @@ mrb_struct_s_def(mrb_state *mrb, mrb_value klass)
  }
  else {
    if (argc > 0) name = argv[0];
    if (argc > 1) rest = argv[1];
    if (mrb_array_p(rest)) {
      if (!mrb_nil_p(name) && mrb_symbol_p(name)) {
        /* 1stArgument:symbol -> name=nil rest=argv[0]-[n] */
        mrb_ary_unshift(mrb, rest, name);
        name = mrb_nil_value();
      }
    }
    else {
      pargv = &argv[1];
      argcnt = argc-1;
      if (!mrb_nil_p(name) && mrb_symbol_p(name)) {
        /* 1stArgument:symbol -> name=nil rest=argv[0]-[n] */
        name = mrb_nil_value();
        pargv = &argv[0];
        argcnt++;
      }
      rest = mrb_ary_new_from_values(mrb, argcnt, pargv);
    pargv = &argv[1];
    argcnt = argc-1;
    if (!mrb_nil_p(name) && mrb_symbol_p(name)) {
      /* 1stArgument:symbol -> name=nil rest=argv[0]-[n] */
      name = mrb_nil_value();
      pargv = &argv[0];
      argcnt++;
    }
    rest = mrb_ary_new_from_values(mrb, argcnt, pargv);
    for (i=0; i<RARRAY_LEN(rest); i++) {
      id = mrb_obj_to_sym(mrb, RARRAY_PTR(rest)[i]);
      mrb_ary_set(mrb, rest, i, mrb_symbol_value(id));

mrbgems/mruby-struct/test/struct.rb

@@ -158,3 +158,9 @@
  assert_equal 1, a.dig(:purple, :red)
  assert_equal 1, a.dig(1, 0)
end

assert("Struct.new does not allow array") do
  assert_raise(TypeError) do
    Struct.new("Test", [:a])
  end
end