Application Wallch has suddenly started crashing

Asked by chris pollock

Description: Ubuntu 16.04.1 LTS
Release: 16.04

chris@localhost:~$ apt-cache policy wallch
wallch:
  Installed: 4.0-0ubuntu4
  Candidate: 4.0-0ubuntu4
  Version table:
 *** 4.0-0ubuntu4 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

The application has started crashing with this noted in my syslog

Aug 28 19:33:33 localhost wallch-nautilus.desktop[7577]: QEventLoop: Cannot be used without QApplication
Aug 28 19:33:33 localhost wallch-nautilus.desktop[7577]: QDBusConnection: system D-Bus connection created before QCoreApplication. Application may misbehave.
Aug 28 19:33:34 localhost wallch-nautilus.desktop[7577]: Error: The message '--focus' could not be sent to Wallch.
Aug 28 19:33:34 localhost wallch-nautilus.desktop[7577]: Assuming that the previous Wallch instance crashed and starting a new one now. Sorry for this :)
Aug 28 19:33:36 localhost wallch-nautilus.desktop[7577]: QXcbWindow: Unhandled client message: "_GTK_LOAD_ICONTHEMES"
Aug 28 19:33:58 localhost kernel: [ 750.373159] traps: wallch[7577] trap divide error ip:458897 sp:7ffe6b95d2d0 error:0 in wallch[400000+13a000]

I ran sudo apt-get install --reinstall wallch thinking that might possibly fix the issue but it didn't.

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actionparsnip (andrew-woodhead666) said :
#1

Does it work OK for the guest user?

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chris pollock (cpollock) said :
#2

Apparently not:

Aug 29 06:29:14 localhost wallch-nautilus.desktop[18183]: QEventLoop: Cannot be used without QApplication
Aug 29 06:29:14 localhost wallch-nautilus.desktop[18183]: QDBusConnection: system D-Bus connection created before QCoreApplication. Application may misbehave.
Aug 29 06:29:15 localhost wallch-nautilus.desktop[18183]: Error: Could not connect to the local socket server.

Aug 29 06:29:54 localhost kernel: [40105.909654] traps: wallch[18183] trap divide error ip:458897 sp:7ffc5f41ea90 error:0 in wallch[400000+13a000]

I could bring it up again, when it crashes and the 'report' window comes up I can 'examine locally' and past the output. I'm beginning to think though that a lot of these issues may be related to the fact that something happened a few days ago and that I asked about in question 369809 but I can't be positive.

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chris pollock (cpollock) said :
#3

I just did a different Google search on QEventLoop: Cannot be used without QApplication and found this:

http://askubuntu.com/questions/626137/wallch-not-working-after-upgrading-to-ubuntu-15-04

I believe I removed the ppa source for some reason a day or so ago. I'm going to follow the instructions in the answer to the question above and will post a comment.

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chris pollock (cpollock) said :
#4

I installed the ppa suggested

chris@localhost:~$ apt-cache policy wallch
wallch:
  Installed: 4.187-1~218~xenial~NoobsLab.com
  Candidate: 4.187-1~218~xenial~NoobsLab.com
  Version table:
 *** 4.187-1~218~xenial~NoobsLab.com 500
        500 http://ppa.launchpad.net/noobslab/apps/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
     4.0-0ubuntu4 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 Package

Installed with the correct command. Once started it appears to be working but it won't change the background at all. I'm going to remove it again, find the ppa I originally used and see what happens.

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chris pollock (cpollock) said :
#5

Same crash with the original version installed

wallch:
  Installed: 4.0-0ubuntu4
  Candidate: 4.0-0ubuntu4
  Version table:
 *** 4.0-0ubuntu4 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

Revision history for this message
chris pollock (cpollock) said :
#6

The original version crashed. I put the /var/crash/_usr_bin_wallch.1000.crash file up on pastebin.

https://pastebin.com/qnzdLrge

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Launchpad Janitor (janitor) said :
#7

This question was expired because it remained in the 'Open' state without activity for the last 15 days.