[issue25709] Problem with string concatenation and utf-8 cache.

[Roundup Robot]

Roundup Robot added the comment:

New changeset b9c8f1c80f47 by Serhiy Storchaka in branch '3.3':
Issue #25709: Fixed problem with in-place string concatenation and utf-8 cache.
https://hg.python.org/cpython/rev/b9c8f1c80f47

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25709>
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