Michael Shields added the comment:

It's not strictly necessary that re objects be copyable, but there's no reason 
to break it either.  It's not strictly necessary that str or int be copyable 
either.

This came up in code that had objects with a number of members, one of which 
was a regexp pattern object.  deepcopy of this object broke in 2.5.

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nosy: +shields

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10076>
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