IRB does not obey frame-level visibility modifiers
I noticed the following today; IRB does not appear to obey the frame-local visibility modifiers like public and private:
$ irb :here irb(main):001:0> private => Object irb(main):002:0> def foo; end; self.class.public_instance_methods.grep :foo => [:foo] irb(main):003:0> private def foo; end; self.class.public_instance_methods.grep :foo => 
Note that the binding these commands are executed in is a method scope binding that also has its frame-local visibility set to private, so it seems like IRB is not working properly here.
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