wnck-applet crashed with signal 5 in _XReply()

[Victor Zhiltsov]

MacBook Pro 12,1 Ubuntu-mate 16.10 Compiz, desktop cube.

Sometimes (unpredictably, about every 10th turn) system freezes while changing workspace (rotating the cube).

Only power off-on helps.

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: mate-panel 1.14.1-1
ProcVersionSignature: Ubuntu 4.4.0-33.52-generic 4.4.15
Uname: Linux 4.4.0-33-generic x86_64
ApportVersion: 2.20.3-0ubuntu2
Architecture: amd64
CurrentDesktop: MATE
Date: Thu Aug 4 04:06:24 2016
ExecutablePath: /usr/lib/mate-panel/wnck-applet
ProcCmdline: /usr/lib/mate-panel/wnck-applet
Signal: 5
SourcePackage: mate-panel
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 XGetGeometry () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
Title: wnck-applet crashed with signal 5 in _XReply()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio bluetooth cdrom dip lpadmin plugdev pulse pulse-access root sambashare sudo vboxsf vboxusers

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Vlad Orlov (monsta)]

Same backtrace as in bug 1682741, only the applet is different.
Fixed in 17.10 by the same patch as in bug 1675888.