[issue29902] copy breaks staticmethod

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I have decided to not merge these changes in 3.5. They help to avoid programmatic errors, but have a non-zero chance of breaking programs that work by accidence. Since this is the last non-secure bugfix we will not have a chance to rollback these changes.

An alternative to these changes is testing a program with Python 3.6.

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versions:  -Python 3.5

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