[Bug 21817] New: Sometimes crashes upon receiving an empty <nick/> update.

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=21817

           Summary: Sometimes crashes upon receiving an empty <nick/>
                    update.
           Product: Telepathy
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: critical
          Priority: medium
         Component: telepathy-gabble
        AssignedTo: telepathy-bugs at lists.freedesktop.org
        ReportedBy: will.thompson at collabora.co.uk


I attempted to set my avatar, and for whatever reason Gabble sent a PEP
nickname update to the server. In response, I received a pubsub event with a
contentless <nick/> node:

<message from='jid redacted' to='jid redacted/Telepathy'><event
xmlns='http://jabber.org/protocol/pubsub#event'><items
node='http://jabber.org/protocol/nick'><item id='4DA4B02D620C9'> <nick
xmlns='http://jabber.org/protocol/nick'/>
</item></items></event></message>

Gabble crashed, because it assumes that if there is a <nick/> node, then
lm_message_node_get_value returns non-NULL, and passes NULL data with a
non-NULL destroy callback to tp_handle_set_qdata(). I infer that Gabble had
previously stored a non-NULL alias on the handle.


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