zkperl: _zk_release_watch doesn't remove items properly from the watch list
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Key: ZOOKEEPER-1380
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1380
Project: ZooKeeper
Issue Type: Bug
Components: contrib-bindings
Affects Versions: 3.4.2, 3.4.1, 3.4.0, 3.3.4, 3.3.3
Reporter: Botond Hejj
Fix For: 3.4.3, 3.5.0
The doubly linked list of watches is not updated properly if a watch is taken
out from the middle of the chain.
The item after the item which is taken out will receive null pointer for the
previous element! This will make the doubly linked list inconsistent and can
lead to segfault or infinite loop when the doubly linked list is iterated later.
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