Why deepcopy with class with __getattr__ makes the tracing go nuts?

[Fabio Zadrozny]

Anyone has any idea why the code attached does not work?

Basically, after doing the deepcopy of the class that has __getattr__
overridden, the python tracing facilities don't seem to work anymore.

In the code-attached, if the deepcopy is removed, all works as
expected (or if __deepcopy__ is overridden too).

Thanks,

Fabio

p.s. I've discovered this while trying to debug a real-world
application and the debugger stopped working after making that
deepcopy.
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