Pidgin crashes occasionally on notification

[Shuhao]

Occasionally pidgin crashes when I receive a message. Using apport-retrace it seem to show that it is inside libnotify when this happens.

I've attached the stack-trace.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: pidgin-libnotify 0.14-9ubuntu2
ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6
Uname: Linux 4.2.0-25-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed Jan 27 14:36:39 2016
InstallationDate: Installed on 2015-11-30 (58 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/zsh
SourcePackage: pidgin-libnotify
UpgradeStatus: No upgrade log present (probably fresh install)