[issue28847] dumbdbm should not commit if in read mode

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Do you have concrete example when not ignoring an OSError in _update causes an issue? This is needed for writing tests.

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components: +Library (Lib)
nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28847>
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