I see this too, on a Bionic system in an Xorg session ** Bug watch added: Debian Bug tracker #887082 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=887082
** Also affects: gnome-shell (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=887082 Importance: Unknown Status: Unknown ** Bug watch added: GNOME Bug Tracker #791233 https://bugzilla.gnome.org/show_bug.cgi?id=791233 ** Also affects: gnome-shell via https://bugzilla.gnome.org/show_bug.cgi?id=791233 Importance: Unknown Status: Unknown -- 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: Unknown Status in gnome-shell package in Ubuntu: Confirmed Status in gnome-shell package in Debian: Unknown 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