** Summary changed:

- Gnome Shell extensions crash
+ Gnome Shell extensions crash [Object Meta.WindowActor (...), has been already 
deallocated .... in theming.js:416 ]

** Summary changed:

- Gnome Shell extensions crash [Object Meta.WindowActor (...), has been already 
deallocated .... in theming.js:416 ]
+ Gnome Shell extensions crash [Object Meta.WindowActor (...), has been already 
deallocated .... in ubuntu-d...@ubuntu.com/theming.js:416]

** Summary changed:

- Gnome Shell extensions crash [Object Meta.WindowActor (...), has been already 
deallocated .... in ubuntu-d...@ubuntu.com/theming.js:416]
+ Gnome Shell extensions crash [Object Meta.WindowActor (...), has been already 
deallocated .... from ubuntu-d...@ubuntu.com/theming.js:416]

** Changed in: gnome-shell (Ubuntu)
       Status: Incomplete => New

** Changed in: gnome-shell-extension-ubuntu-dock (Ubuntu)
       Status: Incomplete => New

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https://bugs.launchpad.net/bugs/1804008

Title:
  Gnome Shell extensions crash [Object Meta.WindowActor (...), has been
  already deallocated .... from ubuntu-d...@ubuntu.com/theming.js:416]

Status in gnome-shell package in Ubuntu:
  Confirmed
Status in gnome-shell-extension-ubuntu-dock package in Ubuntu:
  Confirmed

Bug description:
  All my gnome-shell extensions randomly (apparently) crash. This
  behavior began when i upgraded to cosmic.

  Here's a excerpt of my logs:

  Nov 19 12:57:28 falcon gnome-shell[1640]: Object Meta.WindowActor 
(0x55669ffd87a0), has been already deallocated — impossible to access it. This 
might be caused by the object having been destroyed from C code using something 
such as destroy(), dispose(), or remove() vfuncs.
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #1   5566ae293bb8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:416 
(7fc9f03d7820 @ 20)
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #3   5566ae293b00 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:415 
(7fc9f03d7790 @ 172)
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #5   5566ae293a80 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:424 
(7fc9f03d78b0 @ 17)
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #7   5566ae293a00 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:89 
(7fc9f03d2f70 @ 42)
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #9   5566ae293978 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:456 
(7fc9f03c2dc0 @ 82)
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #11   5566ae2938e0 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1784 
(7fc9f03cf1f0 @ 116)
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #13   5566ae293860 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1903 
(7fc9f03cf5e0 @ 37)
  Nov 19 12:57:28 falcon org.gnome.Shell.desktop[1640]: #15   5566ae2937e0 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/extension.js:31 
(7fc9f03c2550 @ 12)
  Nov 19 12:57:31 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618328'
  Nov 19 12:57:31 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618329'
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #1   5566b0c47bf0 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:416 
(7fc9f03d7820 @ 20)
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #3   5566b0c47b38 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:415 
(7fc9f03d7790 @ 172)
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #5   5566b0c47ab8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:424 
(7fc9f03d78b0 @ 17)
  Nov 19 12:57:31 falcon gnome-shell[1640]: Object Meta.WindowActor 
(0x55669ffd87a0), has been already deallocated — impossible to access it. This 
might be caused by the object having been destroyed from C code using something 
such as destroy(), dispose(), or remove() vfuncs.
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #7   5566b0c47a38 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:89 
(7fc9f03d2f70 @ 42)
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #9   5566b0c479b0 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:456 
(7fc9f03c2dc0 @ 82)
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #11   5566b0c47918 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1784 
(7fc9f03cf1f0 @ 116)
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #13   5566b0c47898 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1903 
(7fc9f03cf5e0 @ 37)
  Nov 19 12:57:31 falcon org.gnome.Shell.desktop[1640]: #15   5566b0c47818 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/extension.js:31 
(7fc9f03c2550 @ 12)
  Nov 19 13:50:35 falcon dbus-daemon[815]: [system] Activating via systemd: 
service name='net.reactivated.Fprint' unit='fprintd.service' requested by 
':1.16238' (uid=1000 pid=1640 comm="/usr/bin/gnome-shell " label="unconfined")
  Nov 19 13:50:35 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618328'
  Nov 19 13:50:35 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618329'
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #1   5566a7f84270 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:416 
(7fc9f03d7820 @ 20)
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #3   5566a7f841b8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:415 
(7fc9f03d7790 @ 172)
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #5   5566a7f84138 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:424 
(7fc9f03d78b0 @ 17)
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #7   5566a7f840b8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:89 
(7fc9f03d2f70 @ 42)
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #9   5566a7f84030 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:456 
(7fc9f03c2dc0 @ 82)
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #11   5566a7f83f98 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1784 
(7fc9f03cf1f0 @ 116)
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #13   5566a7f83f18 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1903 
(7fc9f03cf5e0 @ 37)
  Nov 19 13:50:35 falcon org.gnome.Shell.desktop[1640]: #15   5566a7f83e98 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/extension.js:31 
(7fc9f03c2550 @ 12)
  Nov 19 13:50:35 falcon gnome-shell[1640]: Object Meta.WindowActor 
(0x55669ffd87a0), has been already deallocated — impossible to access it. This 
might be caused by the object having been destroyed from C code using something 
such as destroy(), dispose(), or remove() vfuncs.
  Nov 19 13:50:48 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618328'
  Nov 19 13:50:48 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618329'
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #1   5566b111bea0 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:416 
(7fc9f03d7820 @ 20)
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #3   5566b111bde8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:415 
(7fc9f03d7790 @ 172)
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #5   5566b111bd68 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:424 
(7fc9f03d78b0 @ 17)
  Nov 19 13:50:48 falcon gnome-shell[1640]: Object Meta.WindowActor 
(0x55669ffd87a0), has been already deallocated — impossible to access it. This 
might be caused by the object having been destroyed from C code using something 
such as destroy(), dispose(), or remove() vfuncs.
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #7   5566b111bce8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:89 
(7fc9f03d2f70 @ 42)
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #9   5566b111bc60 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:456 
(7fc9f03c2dc0 @ 82)
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #11   5566b111bbc8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1784 
(7fc9f03cf1f0 @ 116)
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #13   5566b111bb48 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1903 
(7fc9f03cf5e0 @ 37)
  Nov 19 13:50:48 falcon org.gnome.Shell.desktop[1640]: #15   5566b111bac8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/extension.js:31 
(7fc9f03c2550 @ 12)
  Nov 19 13:50:54 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618328'
  Nov 19 13:50:54 falcon gnome-shell[1640]: ../../../../gobject/gsignal.c:2641: 
instance '0x55669ee22c00' has no handler with id '618329'
  Nov 19 13:50:54 falcon org.gnome.Shell.desktop[1640]: #1   5566b179da60 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:416 
(7fc9f03d7820 @ 20)
  Nov 19 13:50:54 falcon org.gnome.Shell.desktop[1640]: #3   5566b179d9a8 i   
/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/theming.js:415 
(7fc9f03d7790 @ 172)
  (...) 

  
  Is there something i can do to help debug the issue?

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: gnome-shell 3.30.1-2ubuntu1
  ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
  Uname: Linux 4.18.0-11-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.10-0ubuntu13.1
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Nov 19 14:28:23 2018
  DisplayManager: gdm3
  InstallationDate: Installed on 2017-12-14 (339 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to cosmic on 2018-10-19 (30 days ago)
  modified.conffile..etc.default.apport: [modified]
  mtime.conffile..etc.default.apport: 2018-11-19T14:27:13.790460

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