[issue28847] dumbdbm should not commit if in read mode

[Roundup Robot]

Roundup Robot added the comment:

New changeset cb4a892e9b66 by Serhiy Storchaka in branch '2.7':
Try to fix test.test_support.rmtree() on Windows for fixing issue28847 tests.
https://hg.python.org/cpython/rev/cb4a892e9b66

----------

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