[issue27897] Avoid possible crash in pysqlite_connection_create_collation

[Roundup Robot]

Roundup Robot added the comment:

New changeset 1aae9b7ff321 by Serhiy Storchaka in branch '2.7':
Issue #27897: Backported tests.
https://hg.python.org/cpython/rev/1aae9b7ff321

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27897>
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