[issue416670] MatchObjects not deepcopy()able

[Andrew McNamara]

Andrew McNamara <andrewm at object-craft.com.au> added the comment:

One reason why this issue has been having less impact is that a bug in 
some versions of the copy.py code meant it was ignoring the 
__deepcopy__ stubs and using the pickle logic to copy _sre objects - 
so, if you run the right python version, compiled regular expressions 
and match objects deepcopy without problems.

On the 2.4 branch (release24-maint), changeset 38430 introduced the bug 
that prevents the class __deepcopy__ exception-raising stubs being 
found.

As an aside, I don't understand why the _sre objects should be 
pickleable, but not deepcopy-able.

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nosy: +andrewmcnamara
versions: +Python 2.7 -Python 2.6

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