Serhiy Storchaka added the comment:
Raising dbm.dumb.error is behavior change. It would be safer not apply this
part in maintained releases.
If add sanity checks in 3.5, note that following line "key =
key.encode('Latin-1')" can raise an exception too (AttributeError or
UnicodeEncodeError). And incorrect data can cause an error later in __getitem__
if pos_and_siz_pair is not a pair of two integers.
I think it is worth to split this issue on two issues and fix only security
issue here.
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nosy: +serhiy.storchaka
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<http://bugs.python.org/issue22885>
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