Strange behaviour/race condition using __send__

Hi there,

I've got a strange error/race condition in my app which occurs in the jmx gem:

It occurs here: https://github.com/enebo/jmxjr/blob/master/lib/jmx.rb#L163
Without any special treatment, it complains that a Proc is expected, but a string was given.

If I change this to
self.class._send_(:define_method, rname, Proc.new

)

The exception changes and it complains that define_method does not exist on the instance, even if self.class is begin called.

If I change _send_ to send the exception disappears.

The funny thing is, that another exception appears afterwards, in a totally different place.

I guess this might be some strange scoping problem.
I cant cleanly reproduce this, but could provide access to the machine.

-Tobias