*** This bug is a duplicate of bug 1747566 *** https://bugs.launchpad.net/bugs/1747566
Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1747566, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find. ** This bug has been marked a duplicate of bug 1747566 syslog fills with messages: Object ..., has been already finalized. Impossible to get any property from it. ... (stack trace in tweener.js) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1759536 Title: stack trace when alt-tab is pressed Status in GNOME Shell: Expired Status in gnome-shell package in Ubuntu: Confirmed Status in gnome-shell package in Debian: Confirmed Bug description: When tailing /var/log/syslog, I see the following errors every time I switch between windows with alt-tab. Mar 28 12:24:51 kashyyyk gnome-shell[3164]: Object Shell.GenericContainer (0x558047013e00), has been already finalized. Impossible to get any property from it. Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: == Stack trace for context 0x558042683230 == Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #0 0x7fff6e9a0330 I resource:///org/gnome/shell/ui/tweener.js:73 (0x7f1c381c7cd0 @ 9) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #1 0x7fff6e9a03d0 b resource:///org/gnome/shell/ui/tweener.js:105 (0x7f1c381c7f78 @ 36) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #2 0x7fff6e9a0470 b resource:///org/gnome/shell/ui/tweener.js:92 (0x7f1c381c7de0 @ 52) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #3 0x7fff6e9a13e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:203 (0x7f1c381d2918 @ 54) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #4 0x7fff6e9a1530 b resource:///org/gnome/gjs/modules/tweener/tweener.js:332 (0x7f1c381d29a0 @ 1626) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #5 0x7fff6e9a15e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:345 (0x7f1c381d2a28 @ 100) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #6 0x7fff6e9a1670 b resource:///org/gnome/gjs/modules/tweener/tweener.js:360 (0x7f1c381d2ab0 @ 10) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #7 0x7fff6e9a16f0 I resource:///org/gnome/gjs/modules/signals.js:126 (0x7f1c381cff78 @ 386) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #8 0x7fff6e9a17a0 b resource:///org/gnome/shell/ui/tweener.js:207 (0x7f1c381cf5e8 @ 159) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #9 0x7fff6e9a1810 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f1c381b4de0 @ 71) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #10 0x7fff6e9a1810 I resource:///org/gnome/shell/ui/tweener.js:182 (0x7f1c381cf560 @ 15) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: == Stack trace for context 0x558042683230 == Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #0 0x7fff6e9a0330 I resource:///org/gnome/shell/ui/tweener.js:80 (0x7f1c381c7cd0 @ 82) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #1 0x7fff6e9a03d0 b resource:///org/gnome/shell/ui/tweener.js:105 (0x7f1c381c7f78 @ 36) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #2 0x7fff6e9a0470 b resource:///org/gnome/shell/ui/tweener.js:92 (0x7f1c381c7de0 @ 52) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #3 0x7fff6e9a13e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:203 (0x7f1c381d2918 @ 54) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #4 0x7fff6e9a1530 b resource:///org/gnome/gjs/modules/tweener/tweener.js:332 (0x7f1c381d29a0 @ 1626) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #5 0x7fff6e9a15e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:345 (0x7f1c381d2a28 @ 100) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #6 0x7fff6e9a1670 b resource:///org/gnome/gjs/modules/tweener/tweener.js:360 (0x7f1c381d2ab0 @ 10) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #7 0x7fff6e9a16f0 I resource:///org/gnome/gjs/modules/signals.js:126 (0x7f1c381cff78 @ 386) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #8 0x7fff6e9a17a0 b resource:///org/gnome/shell/ui/tweener.js:207 (0x7f1c381cf5e8 @ 159) Mar 28 12:24:51 kashyyyk gnome-shell[3164]: Object Shell.GenericContainer (0x558047013e00), has been already finalized. Impossible to set any property to it. Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #9 0x7fff6e9a1810 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f1c381b4de0 @ 71) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #10 0x7fff6e9a1810 I resource:///org/gnome/shell/ui/tweener.js:182 (0x7f1c381cf560 @ 15) Mar 28 12:24:51 kashyyyk gnome-shell[3164]: Object Shell.GenericContainer (0x5580453e2030), has been already finalized. Impossible to get any property from it. Mar 28 12:24:51 kashyyyk gnome-shell[3164]: Object Shell.GenericContainer (0x5580453e2030), has been already finalized. Impossible to set any property to it. Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: == Stack trace for context 0x558042683230 == Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #0 0x7fff6e9a0330 I resource:///org/gnome/shell/ui/tweener.js:73 (0x7f1c381c7cd0 @ 9) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #1 0x7fff6e9a03d0 b resource:///org/gnome/shell/ui/tweener.js:105 (0x7f1c381c7f78 @ 36) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #2 0x7fff6e9a0470 b resource:///org/gnome/shell/ui/tweener.js:92 (0x7f1c381c7de0 @ 52) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #3 0x7fff6e9a13e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:203 (0x7f1c381d2918 @ 54) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #4 0x7fff6e9a1530 b resource:///org/gnome/gjs/modules/tweener/tweener.js:332 (0x7f1c381d29a0 @ 1626) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #5 0x7fff6e9a15e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:345 (0x7f1c381d2a28 @ 100) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #6 0x7fff6e9a1670 b resource:///org/gnome/gjs/modules/tweener/tweener.js:360 (0x7f1c381d2ab0 @ 10) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #7 0x7fff6e9a16f0 I resource:///org/gnome/gjs/modules/signals.js:126 (0x7f1c381cff78 @ 386) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #8 0x7fff6e9a17a0 b resource:///org/gnome/shell/ui/tweener.js:207 (0x7f1c381cf5e8 @ 159) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #9 0x7fff6e9a1810 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f1c381b4de0 @ 71) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #10 0x7fff6e9a1810 I resource:///org/gnome/shell/ui/tweener.js:182 (0x7f1c381cf560 @ 15) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: == Stack trace for context 0x558042683230 == Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #0 0x7fff6e9a0330 I resource:///org/gnome/shell/ui/tweener.js:80 (0x7f1c381c7cd0 @ 82) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #1 0x7fff6e9a03d0 b resource:///org/gnome/shell/ui/tweener.js:105 (0x7f1c381c7f78 @ 36) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #2 0x7fff6e9a0470 b resource:///org/gnome/shell/ui/tweener.js:92 (0x7f1c381c7de0 @ 52) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #3 0x7fff6e9a13e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:203 (0x7f1c381d2918 @ 54) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #4 0x7fff6e9a1530 b resource:///org/gnome/gjs/modules/tweener/tweener.js:332 (0x7f1c381d29a0 @ 1626) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #5 0x7fff6e9a15e0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:345 (0x7f1c381d2a28 @ 100) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #6 0x7fff6e9a1670 b resource:///org/gnome/gjs/modules/tweener/tweener.js:360 (0x7f1c381d2ab0 @ 10) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #7 0x7fff6e9a16f0 I resource:///org/gnome/gjs/modules/signals.js:126 (0x7f1c381cff78 @ 386) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #8 0x7fff6e9a17a0 b resource:///org/gnome/shell/ui/tweener.js:207 (0x7f1c381cf5e8 @ 159) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #9 0x7fff6e9a1810 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f1c381b4de0 @ 71) Mar 28 12:24:51 kashyyyk org.gnome.Shell.desktop[3164]: #10 0x7fff6e9a1810 I resource:///org/gnome/shell/ui/tweener.js:182 (0x7f1c381cf560 @ 15) There's no visible effect of the error AFAICS. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10 Uname: Linux 4.15.0-13-generic x86_64 ApportVersion: 2.20.9-0ubuntu1 Architecture: amd64 CurrentDesktop: GNOME Date: Wed Mar 28 12:25:04 2018 DisplayManager: gdm3 InstallationDate: Installed on 2018-02-25 (30 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180225) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1759536/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp