[issue3179] cPickle is seriously broken

[Facundo Batista]

Facundo Batista <facundo at taniquetil.com.ar> added the comment:

This example works before my patch, exactly!

The reason of the patch I applied is that in some cases a Recursion
error should be raised, but it didn't happen, causing some serious
issues later.

I'm putting in copy to cuerty, for him to analyze if this case should
have caused Recursion error in the first place, or not.

In any case, it's a good example. Ralf, would you mind to generate a
test case from this example?

Thank you all!

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nosy: +cuerty

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