Check more `MRB_ARGS_NONE()`

The `__id__` method implemented in the C function has `MRB_ARGS_NONE()` specified, but it is also effective in the following cases.

```ruby
p nil.__id__ opts: 1 rescue p :a
p nil.method(:__id__).call 1 rescue p :b
p nil.method(:__id__).call opts: 1 rescue p :c
p nil.method(:__id__).to_proc.call 1 rescue p :d
p nil.method(:__id__).to_proc.call opts: 1 rescue p :e
p nil.method(:__id__).unbind.bind_call nil, 1 rescue p :f
p nil.method(:__id__).unbind.bind_call nil, opts: 1 rescue p :g
p nil.__send__ :__id__, 1 rescue p :h
p nil.__send__ :__id__, opts: 1 rescue p :i
```

After applying this patch, all items will output symbols in the same way as CRuby.

For this purpose, add `MRB_PROC_NOARG` to `struct RProc::flags`.

2 files changed, 8 insertions, 0 deletions

diff --git a/test/t/argumenterror.rb b/test/t/argumenterror.rb
index 3dcb29a4b..3772f1b0f 100644
--- a/test/t/argumenterror.rb
+++ b/test/t/argumenterror.rb
@@ -30,3 +30,8 @@ assert("'wrong number of arguments' from mrb_get_args") do
   assert_argnum_error(1, 2){Object.const_set(:B)}
   assert_argnum_error(3, 2){Object.const_set(:C, 1, 2)}
 end
+
+assert('Call to MRB_ARGS_NONE method') do
+  assert_raise(ArgumentError) { nil.__id__ 1 }
+  assert_raise(ArgumentError) { nil.__id__ opts: 1 }
+end
diff --git a/test/t/kernel.rb b/test/t/kernel.rb
index 0a70ec0d2..06551ae88 100644
--- a/test/t/kernel.rb
+++ b/test/t/kernel.rb
@@ -95,6 +95,9 @@ assert('Kernel#__send__', '15.3.1.3.4') do
   args = [:respond_to?, :nil?]
   assert_true __send__(*args)
   assert_equal [:respond_to?, :nil?], args
+
+  assert_raise(ArgumentError) { nil.__send__(:__id__, 1) }
+  assert_raise(ArgumentError) { nil.__send__(:__id__, opts: 1) }
 end
 
 assert('Kernel#block_given?', '15.3.1.3.6') do