[issue26959] pickle: respect dispatch for functions again

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Is saving global an atomic operation? Falling back to using reduce can be not safe if some data was written during saving global. That also might make error messages less helpful. Is not founding a function the only cause of PicklingError? Raising and catching an exception is not very efficient. Shouldn't the fallback be used for classes and C functions?

If add this feature the patch should be significantly reworked.

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nosy: +serhiy.storchaka
stage: patch review -> needs patch
type: behavior -> enhancement
versions: +Python 3.7 -Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26959>
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