[Bug 1872509] [NEW] xfwm4 crashed with signal 5 in _XReply()

Launchpad Bug Tracker 1872509 at bugs.launchpad.net
Tue Apr 6 10:37:33 UTC 2021

You have been subscribed to a public bug by Sean Davis (bluesabre):


 * Some client applications crash when closing a dialog with the Xfwm4
compositor off.

[Test Plan]

 * Disable the Xfwm4 compositor. Settings Manager > Window Manager
Tweaks > Compositor > Toggle off "Enable Display Compositing".

 * Open Catfish.

 * Open the About dialog.

 * Close the About dialog.

 * Catfish crashes.

 * Once fixes, Catfish will no longer crash.

[Where problems could occur]

 * Regression potential should be relatively low, as the release between
4.14.1 and 4.14.5 are bug releases.

 * With window managers, some changes could lead to different behavior
and other broken displays. Non-AMD graphics users should also test for

[Other Info]
 * Please see the Xfwm4 release notes for changes between 4.14.1 and 4.14.5: https://gitlab.xfce.org/xfce/xfwm4/-/blob/xfce-4.14/NEWS#L7-44

[Original Report]

Crash in Catfish when closing the about dialog when running with
compositing off.

ProblemType: Crash
DistroRelease: Ubuntu 20.04
Package: xfwm4 4.14.0-2ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu25
Architecture: amd64
CasperVersion: 1.443
CurrentDesktop: XFCE
Date: Mon Apr 13 08:16:42 2020
ExecutablePath: /usr/bin/xfwm4
LiveMediaBuild: Xubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200409)
ProcCmdline: xfwm4 --replace --display :0.0 --sm-client-id 2c1491795-ed9c-412d-9ef8-3a11bd50a364
 PATH=(custom, no user)
Signal: 5
SourcePackage: xfwm4
 ?? () from /lib/x86_64-linux-gnu/libX11.so.6
 ?? () from /lib/x86_64-linux-gnu/libX11.so.6
 _XReply () from /lib/x86_64-linux-gnu/libX11.so.6
 XSync () from /lib/x86_64-linux-gnu/libX11.so.6
 ?? () from /lib/x86_64-linux-gnu/libgdk-3.so.0
Title: xfwm4 crashed with signal 5 in _XReply()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo

** Affects: xfwm4 (Ubuntu)
     Importance: Medium
         Status: Confirmed

** Affects: xfwm4 (Ubuntu Focal)
     Importance: Undecided
         Status: Confirmed

** Affects: xfwm4 (Ubuntu Groovy)
     Importance: Undecided
         Status: Fix Released

** Tags: amd64 apport-crash focal
xfwm4 crashed with signal 5 in _XReply()
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