[issue24912] The type of cached objects is mutable

[Mark Shannon]

Mark Shannon added the comment:

Eek! indeed :)

I intend to track down the cause of this on Monday, and hopefully come up with a fix, unless anyone beats me to it. 

Does anyone know if there is another issue for this?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24912>
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