Public bug reported:

I had to restart gnome shell to get the dock to reappear with Alt-F2 r
(which I hear doesn't work in newer Ubuntu).

There are a number of gnome-shell issues in syslog:

Apr  4 00:15:21 cerberus gnome-shell[4263]: System monitor applet enabling
Apr  4 00:15:22 cerberus gnome-shell[4263]: error reading: 
/sys/class/hwmon/hwmon0/fan1_input
Apr  4 00:15:22 cerberus gnome-shell[4263]: System monitor applet enabling done
Apr  4 00:15:22 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem :1.319/StatusNotifierItem
Apr  4 00:15:22 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.105/org/ayatana/NotificationItem/software_update_available
Apr  4 00:15:22 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.69/org/ayatana/NotificationItem/org_gnome_Pomodoro
Apr  4 00:15:22 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem :1.105/org/ayatana/NotificationItem/livepatch
Apr  4 00:15:22 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.70/org/ayatana/NotificationItem/classicmenu_indicator
Apr  4 00:15:23 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] Using 
Brute-force mode for StatusNotifierItem 
:1.67/org/ayatana/NotificationItem/indicator_cpufreq
Apr  4 00:15:23 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.67/org/ayatana/NotificationItem/indicator_cpufreq
Apr  4 00:15:23 cerberus kernel: [201601.586313] sr 5:0:0:0: [sr0] tag#29 
FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr  4 00:15:23 cerberus kernel: [201601.586316] sr 5:0:0:0: [sr0] tag#29 Sense 
Key : Illegal Request [current] 
Apr  4 00:15:23 cerberus kernel: [201601.586319] sr 5:0:0:0: [sr0] tag#29 Add. 
Sense: Read of scrambled sector without authentication
Apr  4 00:15:23 cerberus kernel: [201601.586322] sr 5:0:0:0: [sr0] tag#29 CDB: 
Read(10) 28 00 00 3a 8a 40 00 00 40 00
Apr  4 00:15:23 cerberus kernel: [201601.586323] print_req_error: I/O error, 
dev sr0, sector 15345920
Apr  4 00:15:23 cerberus kernel: [201601.670291] sr 5:0:0:0: [sr0] tag#0 FAILED 
Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr  4 00:15:23 cerberus kernel: [201601.670295] sr 5:0:0:0: [sr0] tag#0 Sense 
Key : Illegal Request [current] 
Apr  4 00:15:23 cerberus kernel: [201601.670298] sr 5:0:0:0: [sr0] tag#0 Add. 
Sense: Read of scrambled sector without authentication
Apr  4 00:15:23 cerberus kernel: [201601.670300] sr 5:0:0:0: [sr0] tag#0 CDB: 
Read(10) 28 00 00 3a 8a 60 00 00 01 00
Apr  4 00:15:23 cerberus kernel: [201601.670303] print_req_error: I/O error, 
dev sr0, sector 15346048
Apr  4 00:15:23 cerberus kernel: [201601.670307] Buffer I/O error on dev sr0, 
logical block 3836512, async page read
Apr  4 00:15:23 cerberus kernel: [201601.730390] sr 5:0:0:0: [sr0] tag#2 FAILED 
Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr  4 00:15:23 cerberus kernel: [201601.730394] sr 5:0:0:0: [sr0] tag#2 Sense 
Key : Illegal Request [current] 
Apr  4 00:15:23 cerberus kernel: [201601.730399] sr 5:0:0:0: [sr0] tag#2 Add. 
Sense: Read of scrambled sector without authentication
Apr  4 00:15:23 cerberus kernel: [201601.730402] sr 5:0:0:0: [sr0] tag#2 CDB: 
Read(10) 28 00 00 3a 8a 61 00 00 01 00
Apr  4 00:15:23 cerberus kernel: [201601.730405] print_req_error: I/O error, 
dev sr0, sector 15346052
Apr  4 00:15:23 cerberus kernel: [201601.730411] Buffer I/O error on dev sr0, 
logical block 3836513, async page read
Apr  4 00:15:23 cerberus gvfsd-metadata[4709]: g_udev_device_has_property: 
assertion 'G_UDEV_IS_DEVICE (device)' failed
Apr  4 00:15:23 cerberus gvfsd-metadata[4709]: g_udev_device_has_property: 
assertion 'G_UDEV_IS_DEVICE (device)' failed
Apr  4 00:15:28 cerberus gnome-shell[4263]: [AppIndicatorSupport-WARN] 
Attempting to re-register :1.67/org/ayatana/NotificationItem/indicator_cpufreq; 
resetting instead
Apr  4 00:15:28 cerberus gnome-shell[4263]: [AppIndicatorSupport-WARN] Item 
:1.67/org/ayatana/NotificationItem/indicator_cpufreq is already registered
Apr  4 00:15:33 cerberus gnome-shell[4263]: [AppIndicatorSupport-WARN] While 
reading menu layout: Gio.DBusError: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: No such object path 
'/MenuBar'
Apr  4 00:15:33 cerberus gnome-shell[4263]: [AppIndicatorSupport-WARN] Could 
not retrieve properties: Gio.DBusError: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: No such object path 
'/MenuBar'
Apr  4 00:15:33 cerberus gnome-shell[4263]: Object 
.Gjs_AppIndicatorIconActor__1 (0x55f34ac7a040), has been already finalized. 
Impossible to set any property to it.
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: == Stack trace for 
context 0x55f34023c320 ==
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #0 0x7ffefdb014d0 I   
resource:///org/gnome/gjs/modules/_legacy.js:83 (0x7f9bb40b5de0 @ 87)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #1 0x55f3405fd1b0 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/indicatorStatusIcon.js:93
 (0x7f99a61a6808 @ 58)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #2 0x7ffefdb020b0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #3 0x7ffefdb02170 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #4 0x7ffefdb021f0 I   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #5 0x55f3405fd128 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/appIndicator.js:190
 (0x7f99a61984d8 @ 22)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #6 0x7ffefdb02dd0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #7 0x55f3405fd080 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:176
 (0x7f99a6195780 @ 26)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #8 0x7ffefdb039b0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #9 0x55f3405fcfe0 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:170
 (0x7f99a61956f8 @ 68)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #10 0x7ffefdb045a0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:15:33 cerberus org.gnome.Shell.desktop[4263]: #11 0x7ffefdb04670 b   
self-hosted:918 (0x7f9bb40f12b8 @ 394)
Apr  4 00:20:39 cerberus snapd[2186]: storehelpers.go:438: cannot refresh: snap 
has no updates available: "core", "core18", "gnome-3-26-1604", 
"gnome-3-28-1804", "gnome-calculator", "gnome-characters", "gnome-logs", 
"gnome-system-monitor", "gtk-common-themes"
Apr  4 00:20:39 cerberus snapd[2186]: autorefresh.go:397: auto-refresh: all 
snaps are up-to-date
Apr  4 00:31:22 cerberus gnome-shell[4263]: System monitor applet disable
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: == Stack trace for 
context 0x55f34023c320 ==
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #0 0x7ffefdaf8d60 I   
resource:///org/gnome/gjs/modules/_legacy.js:83 (0x7f9bb40b5de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #1 0x55f3405fd6b8 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/indicatorStatusIcon.js:93
 (0x7f99a61a6808 @ 58)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #2 0x7ffefdaf9940 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #3 0x7ffefdaf9a00 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #4 0x7ffefdaf9af0 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #5 0x55f3405fd630 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/appIndicator.js:190
 (0x7f99a61984d8 @ 22)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #6 0x7ffefdafa740 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #7 0x55f3405fd588 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:219
 (0x7f99a6195ab0 @ 225)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #8 0x7ffefdafb320 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #9 0x55f3405fd510 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/extension.js:61
 (0x7f99a6182d58 @ 37)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #10 0x7ffefdafc000 b   
resource:///org/gnome/shell/ui/extensionSystem.js:83 (0x7f9b940592b8 @ 441)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #11 0x55f3405fd3d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:354 (0x7f9b94059d58 @ 13)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #12 0x7ffefdafce00 b   
self-hosted:251 (0x7f9bb40c4ab0 @ 223)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #13 0x55f3405fd350 i   
resource:///org/gnome/shell/ui/extensionSystem.js:353 (0x7f9b94059cd0 @ 64)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #14 0x55f3405fd2d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:371 (0x7f9b94059de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #15 0x7ffefdafe300 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #16 0x7ffefdafeb10 b   
resource:///org/gnome/shell/ui/sessionMode.js:205 (0x7f9b840704d8 @ 254)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #17 0x7ffefdaff7f0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #18 0x55f3405fd190 i   
resource:///org/gnome/shell/ui/sessionMode.js:167 (0x7f9b840702b8 @ 40)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #19 0x7ffefdb003d0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus gnome-software[5934]: no app for changed 
shortc...@kyle.aims.ac.za
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #20 0x55f3405fd0e8 i   
resource:///org/gnome/shell/ui/screenShield.js:1282 (0x7f9b84053a28 @ 188)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #21 0x7ffefdb00fb0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #22 0x55f3405fd060 i   
resource:///org/gnome/shell/ui/screenShield.js:902 (0x7f9b84051b38 @ 18)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #23 0x7ffefdb01b90 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #24 0x7ffefdb02330 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #25 0x7ffefdb02420 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #26 0x55f3405fcfe0 i   
resource:///org/gnome/shell/ui/lightbox.js:186 (0x7f9b94038a28 @ 29)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #27 0x7ffefdb03850 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7f9bb40d2b38 @ 54)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #28 0x7ffefdb040a0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:337 (0x7f9bb40d2bc0 @ 1626)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #29 0x7ffefdb04150 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:350 (0x7f9bb40d2c48 @ 100)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #30 0x7ffefdb041e0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7f9bb40d2cd0 @ 10)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #31 0x7ffefdb04260 I   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #32 0x7ffefdb04310 b   
resource:///org/gnome/shell/ui/tweener.js:244 (0x7f9bb40cf808 @ 159)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #33 0x7ffefdb04380 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #34 0x7ffefdb04380 I   
resource:///org/gnome/shell/ui/tweener.js:219 (0x7f9bb40cf780 @ 15)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: == Stack trace for 
context 0x55f34023c320 ==
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #0 0x7ffefdaf8d60 I   
resource:///org/gnome/gjs/modules/_legacy.js:83 (0x7f9bb40b5de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #1 0x55f3405fd6b8 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/indicatorStatusIcon.js:93
 (0x7f99a61a6808 @ 58)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #2 0x7ffefdaf9940 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #3 0x7ffefdaf9a00 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #4 0x7ffefdaf9af0 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus gnome-software[5934]: no app for changed 
bettervol...@tudmotu.com
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #5 0x55f3405fd630 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/appIndicator.js:190
 (0x7f99a61984d8 @ 22)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #6 0x7ffefdafa740 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #7 0x55f3405fd588 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:219
 (0x7f99a6195ab0 @ 225)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #8 0x7ffefdafb320 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #9 0x55f3405fd510 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/extension.js:61
 (0x7f99a6182d58 @ 37)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #10 0x7ffefdafc000 b   
resource:///org/gnome/shell/ui/extensionSystem.js:83 (0x7f9b940592b8 @ 441)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #11 0x55f3405fd3d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:354 (0x7f9b94059d58 @ 13)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #12 0x7ffefdafce00 b   
self-hosted:251 (0x7f9bb40c4ab0 @ 223)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #13 0x55f3405fd350 i   
resource:///org/gnome/shell/ui/extensionSystem.js:353 (0x7f9b94059cd0 @ 64)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #14 0x55f3405fd2d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:371 (0x7f9b94059de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #15 0x7ffefdafe300 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #16 0x7ffefdafeb10 b   
resource:///org/gnome/shell/ui/sessionMode.js:205 (0x7f9b840704d8 @ 254)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #17 0x7ffefdaff7f0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #18 0x55f3405fd190 i   
resource:///org/gnome/shell/ui/sessionMode.js:167 (0x7f9b840702b8 @ 40)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #19 0x7ffefdb003d0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #20 0x55f3405fd0e8 i   
resource:///org/gnome/shell/ui/screenShield.js:1282 (0x7f9b84053a28 @ 188)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #21 0x7ffefdb00fb0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #22 0x55f3405fd060 i   
resource:///org/gnome/shell/ui/screenShield.js:902 (0x7f9b84051b38 @ 18)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #23 0x7ffefdb01b90 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #24 0x7ffefdb02330 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #25 0x7ffefdb02420 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus gnome-shell[4263]: Object 
.Gjs_AppIndicatorIconActor__1 (0x55f343f95040), has been already finalized. 
Impossible to set any property to it.
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #26 0x55f3405fcfe0 i   
resource:///org/gnome/shell/ui/lightbox.js:186 (0x7f9b94038a28 @ 29)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #27 0x7ffefdb03850 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7f9bb40d2b38 @ 54)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #28 0x7ffefdb040a0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:337 (0x7f9bb40d2bc0 @ 1626)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #29 0x7ffefdb04150 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:350 (0x7f9bb40d2c48 @ 100)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #30 0x7ffefdb041e0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7f9bb40d2cd0 @ 10)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #31 0x7ffefdb04260 I   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #32 0x7ffefdb04310 b   
resource:///org/gnome/shell/ui/tweener.js:244 (0x7f9bb40cf808 @ 159)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #33 0x7ffefdb04380 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #34 0x7ffefdb04380 I   
resource:///org/gnome/shell/ui/tweener.js:219 (0x7f9bb40cf780 @ 15)
Apr  4 00:31:22 cerberus gnome-shell[4263]: Object 
.Gjs_AppIndicatorIconActor__1 (0x55f34ac1fc40), has been already finalized. 
Impossible to set any property to it.
Apr  4 00:31:22 cerberus gnome-shell[4263]: Object 
.Gjs_AppIndicatorIconActor__1 (0x55f347142040), has been already finalized. 
Impossible to set any property to it.
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: == Stack trace for 
context 0x55f34023c320 ==
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #0 0x7ffefdaf8d60 I   
resource:///org/gnome/gjs/modules/_legacy.js:83 (0x7f9bb40b5de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #1 0x55f3405fd6b8 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/indicatorStatusIcon.js:93
 (0x7f99a61a6808 @ 58)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #2 0x7ffefdaf9940 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #3 0x7ffefdaf9a00 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #4 0x7ffefdaf9af0 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #5 0x55f3405fd630 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/appIndicator.js:190
 (0x7f99a61984d8 @ 22)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #6 0x7ffefdafa740 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #7 0x55f3405fd588 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:219
 (0x7f99a6195ab0 @ 225)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #8 0x7ffefdafb320 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #9 0x55f3405fd510 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/extension.js:61
 (0x7f99a6182d58 @ 37)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #10 0x7ffefdafc000 b   
resource:///org/gnome/shell/ui/extensionSystem.js:83 (0x7f9b940592b8 @ 441)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #11 0x55f3405fd3d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:354 (0x7f9b94059d58 @ 13)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #12 0x7ffefdafce00 b   
self-hosted:251 (0x7f9bb40c4ab0 @ 223)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #13 0x55f3405fd350 i   
resource:///org/gnome/shell/ui/extensionSystem.js:353 (0x7f9b94059cd0 @ 64)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #14 0x55f3405fd2d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:371 (0x7f9b94059de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #15 0x7ffefdafe300 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #16 0x7ffefdafeb10 b   
resource:///org/gnome/shell/ui/sessionMode.js:205 (0x7f9b840704d8 @ 254)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #17 0x7ffefdaff7f0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #18 0x55f3405fd190 i   
resource:///org/gnome/shell/ui/sessionMode.js:167 (0x7f9b840702b8 @ 40)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #19 0x7ffefdb003d0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #20 0x55f3405fd0e8 i   
resource:///org/gnome/shell/ui/screenShield.js:1282 (0x7f9b84053a28 @ 188)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #21 0x7ffefdb00fb0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #22 0x55f3405fd060 i   
resource:///org/gnome/shell/ui/screenShield.js:902 (0x7f9b84051b38 @ 18)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #23 0x7ffefdb01b90 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #24 0x7ffefdb02330 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #25 0x7ffefdb02420 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #26 0x55f3405fcfe0 i   
resource:///org/gnome/shell/ui/lightbox.js:186 (0x7f9b94038a28 @ 29)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #27 0x7ffefdb03850 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7f9bb40d2b38 @ 54)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #28 0x7ffefdb040a0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:337 (0x7f9bb40d2bc0 @ 1626)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #29 0x7ffefdb04150 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:350 (0x7f9bb40d2c48 @ 100)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #30 0x7ffefdb041e0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7f9bb40d2cd0 @ 10)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #31 0x7ffefdb04260 I   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #32 0x7ffefdb04310 b   
resource:///org/gnome/shell/ui/tweener.js:244 (0x7f9bb40cf808 @ 159)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #33 0x7ffefdb04380 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #34 0x7ffefdb04380 I   
resource:///org/gnome/shell/ui/tweener.js:219 (0x7f9bb40cf780 @ 15)
Apr  4 00:31:22 cerberus gnome-shell[4263]: Object 
.Gjs_AppIndicatorIconActor__1 (0x55f34a248840), has been already finalized. 
Impossible to set any property to it.
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: == Stack trace for 
context 0x55f34023c320 ==
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #0 0x7ffefdaf84d0 I   
resource:///org/gnome/gjs/modules/_legacy.js:83 (0x7f9bb40b5de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #1 0x55f3405fd6b8 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/indicatorStatusIcon.js:93
 (0x7f99a61a6808 @ 58)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #2 0x7ffefdaf90b0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #3 0x7ffefdaf9170 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #4 0x7ffefdaf9260 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #5 0x55f3405fd630 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/appIndicator.js:190
 (0x7f99a61984d8 @ 22)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #6 0x7ffefdaf9eb0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #7 0x7ffefdafa640 b   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:219
 (0x7f99a6195ab0 @ 225)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #8 0x7ffefdafb320 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #9 0x55f3405fd510 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/extension.js:61
 (0x7f99a6182d58 @ 37)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #10 0x7ffefdafc000 b   
resource:///org/gnome/shell/ui/extensionSystem.js:83 (0x7f9b940592b8 @ 441)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #11 0x55f3405fd3d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:354 (0x7f9b94059d58 @ 13)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #12 0x7ffefdafce00 b   
self-hosted:251 (0x7f9bb40c4ab0 @ 223)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #13 0x55f3405fd350 i   
resource:///org/gnome/shell/ui/extensionSystem.js:353 (0x7f9b94059cd0 @ 64)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #14 0x55f3405fd2d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:371 (0x7f9b94059de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #15 0x7ffefdafe300 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #16 0x7ffefdafeb10 b   
resource:///org/gnome/shell/ui/sessionMode.js:205 (0x7f9b840704d8 @ 254)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #17 0x7ffefdaff7f0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #18 0x55f3405fd190 i   
resource:///org/gnome/shell/ui/sessionMode.js:167 (0x7f9b840702b8 @ 40)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #19 0x7ffefdb003d0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #20 0x55f3405fd0e8 i   
resource:///org/gnome/shell/ui/screenShield.js:1282 (0x7f9b84053a28 @ 188)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #21 0x7ffefdb00fb0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #22 0x55f3405fd060 i   
resource:///org/gnome/shell/ui/screenShield.js:902 (0x7f9b84051b38 @ 18)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #23 0x7ffefdb01b90 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #24 0x7ffefdb02330 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #25 0x7ffefdb02420 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #26 0x55f3405fcfe0 i   
resource:///org/gnome/shell/ui/lightbox.js:186 (0x7f9b94038a28 @ 29)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #27 0x7ffefdb03850 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7f9bb40d2b38 @ 54)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #28 0x7ffefdb040a0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:337 (0x7f9bb40d2bc0 @ 1626)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #29 0x7ffefdb04150 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:350 (0x7f9bb40d2c48 @ 100)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #30 0x7ffefdb041e0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7f9bb40d2cd0 @ 10)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #31 0x7ffefdb04260 I   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #32 0x7ffefdb04310 b   
resource:///org/gnome/shell/ui/tweener.js:244 (0x7f9bb40cf808 @ 159)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #33 0x7ffefdb04380 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #34 0x7ffefdb04380 I   
resource:///org/gnome/shell/ui/tweener.js:219 (0x7f9bb40cf780 @ 15)
Apr  4 00:31:22 cerberus gnome-shell[4263]: Object 
.Gjs_AppIndicatorIconActor__1 (0x55f348432030), has been already finalized. 
Impossible to set any property to it.
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: == Stack trace for 
context 0x55f34023c320 ==
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #0 0x7ffefdaf8c90 I   
resource:///org/gnome/gjs/modules/_legacy.js:83 (0x7f9bb40b5de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #1 0x55f3405fd6b8 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/indicatorStatusIcon.js:93
 (0x7f99a61a6808 @ 58)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #2 0x7ffefdaf9870 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #3 0x7ffefdaf9930 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #4 0x7ffefdaf99b0 I   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #5 0x55f3405fd630 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/appIndicator.js:190
 (0x7f99a61984d8 @ 22)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #6 0x7ffefdafa590 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #7 0x7ffefdafa640 b   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:219
 (0x7f99a6195ab0 @ 225)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #8 0x7ffefdafb320 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #9 0x55f3405fd510 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/extension.js:61
 (0x7f99a6182d58 @ 37)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #10 0x7ffefdafc000 b   
resource:///org/gnome/shell/ui/extensionSystem.js:83 (0x7f9b940592b8 @ 441)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #11 0x55f3405fd3d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:354 (0x7f9b94059d58 @ 13)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #12 0x7ffefdafce00 b   
self-hosted:251 (0x7f9bb40c4ab0 @ 223)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #13 0x55f3405fd350 i   
resource:///org/gnome/shell/ui/extensionSystem.js:353 (0x7f9b94059cd0 @ 64)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #14 0x55f3405fd2d0 i   
resource:///org/gnome/shell/ui/extensionSystem.js:371 (0x7f9b94059de0 @ 87)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #15 0x7ffefdafe300 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #16 0x7ffefdafeb10 b   
resource:///org/gnome/shell/ui/sessionMode.js:205 (0x7f9b840704d8 @ 254)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #17 0x7ffefdaff7f0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #18 0x55f3405fd190 i   
resource:///org/gnome/shell/ui/sessionMode.js:167 (0x7f9b840702b8 @ 40)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #19 0x7ffefdb003d0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #20 0x55f3405fd0e8 i   
resource:///org/gnome/shell/ui/screenShield.js:1282 (0x7f9b84053a28 @ 188)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #21 0x7ffefdb00fb0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #22 0x55f3405fd060 i   
resource:///org/gnome/shell/ui/screenShield.js:902 (0x7f9b84051b38 @ 18)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #23 0x7ffefdb01b90 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #24 0x7ffefdb02330 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #25 0x7ffefdb02420 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #26 0x55f3405fcfe0 i   
resource:///org/gnome/shell/ui/lightbox.js:186 (0x7f9b94038a28 @ 29)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #27 0x7ffefdb03850 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7f9bb40d2b38 @ 54)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #28 0x7ffefdb040a0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:337 (0x7f9bb40d2bc0 @ 1626)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #29 0x7ffefdb04150 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:350 (0x7f9bb40d2c48 @ 100)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #30 0x7ffefdb041e0 b   
resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7f9bb40d2cd0 @ 10)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #31 0x7ffefdb04260 I   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #32 0x7ffefdb04310 b   
resource:///org/gnome/shell/ui/tweener.js:244 (0x7f9bb40cf808 @ 159)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #33 0x7ffefdb04380 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 00:31:22 cerberus org.gnome.Shell.desktop[4263]: #34 0x7ffefdb04380 I   
resource:///org/gnome/shell/ui/tweener.js:219 (0x7f9bb40cf780 @ 15)
Apr  4 00:31:28 cerberus kernel: [202566.662116] [drm:log_to_debug_console 
[amdgpu]] *ERROR* No EDID read.
Apr  4 00:31:28 cerberus kernel: [202566.686787] [drm] U4008B: [Block 0] 
Apr  4 00:31:28 cerberus kernel: [202566.686788] [drm] U4008B: [Block 1] 
Apr  4 00:31:28 cerberus kernel: [202566.686792] [drm] dc_link_detect: 
manufacturer_id = E305, product_id = 4008, serial_number = FA, manufacture_week 
= 45, manufacture_year = 27, display_name = U4008B, speaker_flag = 1, 
audio_mode_count = 1
Apr  4 00:31:28 cerberus kernel: [202566.686794] [drm] dc_link_detect: mode 
number = 0, format_code = 1, channel_count = 2, sample_rate = 7, sample_size = 7
Apr  4 00:31:28 cerberus gsd-color[2939]: failed to set screen _ICC_PROFILE: 
Failed to open file 
“/home/jlquinn/.local/share/icc/edid-385c537b9dd9660f747a298df00f456c.icc”: 
Permission denied
Apr  4 00:31:31 cerberus gnome-shell[4263]: g_array_unref: assertion 'array' 
failed
Apr  4 01:03:46 cerberus gnome-shell[4263]: g_array_unref: assertion 'array' 
failed
Apr  4 01:04:02 cerberus gnome-shell[4263]: System monitor applet enabling
Apr  4 01:04:02 cerberus gnome-shell[4263]: error reading: 
/sys/class/hwmon/hwmon0/fan1_input
Apr  4 01:04:02 cerberus kernel: [204519.181357] [drm] {3840x2160, 
4000x2222@533250Khz}
Apr  4 01:04:02 cerberus kernel: [204520.294869] [drm:log_to_debug_console 
[amdgpu]] *ERROR* No EDID read.
Apr  4 01:04:02 cerberus kernel: [204520.319478] [drm] U4008B: [Block 0] 
Apr  4 01:04:02 cerberus kernel: [204520.319479] [drm] U4008B: [Block 1] 
Apr  4 01:04:02 cerberus kernel: [204520.319481] [drm] dc_link_detect: 
manufacturer_id = E305, product_id = 4008, serial_number = FA, manufacture_week 
= 45, manufacture_year = 27, display_name = U4008B, speaker_flag = 1, 
audio_mode_count = 1
Apr  4 01:04:02 cerberus kernel: [204520.319482] [drm] dc_link_detect: mode 
number = 0, format_code = 1, channel_count = 2, sample_rate = 7, sample_size = 7
Apr  4 01:04:02 cerberus gnome-shell[4263]: System monitor applet enabling done
Apr  4 01:04:02 cerberus gnome-shell[4263]: JS ERROR: TypeError: monitor is 
null#012_reposition@resource:///org/gnome/shell/ui/boxpointer.js:508:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_allocate@resource:///org/gnome/shell/ui/boxpointer.js:235:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_init/<@resource:///org/gnome/shell/ui/layout.js:210:17#012_updateRegions@resource:///org/gnome/shell/ui/layout.js:989:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
Apr  4 01:04:02 cerberus boinc[3401]: No protocol specified
Apr  4 01:04:02 cerberus gnome-shell[4263]: JS WARNING: 
[/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js 1778]: 
reference to undefined property "_workspaceIsolation"
Apr  4 01:04:02 cerberus gnome-shell[4263]: JS ERROR: TypeError: 
this._workspaceIsolation is 
undefined#012DockManager<._deleteDocks@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1778:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1662:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
Apr  4 01:04:02 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.70/org/ayatana/NotificationItem/classicmenu_indicator
Apr  4 01:04:02 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.105/org/ayatana/NotificationItem/software_update_available
Apr  4 01:04:02 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem :1.105/org/ayatana/NotificationItem/livepatch
Apr  4 01:04:02 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.69/org/ayatana/NotificationItem/org_gnome_Pomodoro
Apr  4 01:04:02 cerberus gsd-color[2939]: failed to set screen _ICC_PROFILE: 
Failed to open file 
“/home/jlquinn/.local/share/icc/edid-385c537b9dd9660f747a298df00f456c.icc”: 
Permission denied
Apr  4 01:04:03 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] Using 
Brute-force mode for StatusNotifierItem 
:1.67/org/ayatana/NotificationItem/indicator_cpufreq
Apr  4 01:04:03 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem 
:1.67/org/ayatana/NotificationItem/indicator_cpufreq
Apr  4 01:04:04 cerberus gnome-shell[4263]: [AppIndicatorSupport-WARN] 
Attempting to re-register :1.67/org/ayatana/NotificationItem/indicator_cpufreq; 
resetting instead
Apr  4 01:04:04 cerberus gnome-shell[4263]: [AppIndicatorSupport-WARN] Item 
:1.67/org/ayatana/NotificationItem/indicator_cpufreq is already registered
Apr  4 01:15:18 cerberus gnome-shell[4263]: [AppIndicatorSupport-DEBUG] 
Registering StatusNotifierItem :1.332/StatusNotifierItem
Apr  4 01:15:43 cerberus gnome-shell[4263]: Object 
.Gjs_AppIndicatorIconActor__1 (0x55f349e40840), has been already finalized. 
Impossible to set any property to it.
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: == Stack trace for 
context 0x55f34023c320 ==
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #0 0x7ffefdb013f0 I   
resource:///org/gnome/gjs/modules/_legacy.js:83 (0x7f9bb40b5de0 @ 87)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #1 0x55f3405fd1b0 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/indicatorStatusIcon.js:93
 (0x7f99a61a6808 @ 58)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #2 0x7ffefdb01fd0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #3 0x7ffefdb02090 b   
self-hosted:916 (0x7f9bb40f12b8 @ 367)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #4 0x7ffefdb02180 b   
resource:///org/gnome/gjs/modules/signals.js:128 (0x7f9bb40d2230 @ 386)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #5 0x55f3405fd128 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/appIndicator.js:190
 (0x7f99a61984d8 @ 22)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #6 0x7ffefdb02dd0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #7 0x55f3405fd080 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:176
 (0x7f99a6195780 @ 26)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #8 0x7ffefdb039b0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #9 0x55f3405fcfe0 i   
/usr/share/gnome-shell/extensions/ubuntu-appindicat...@ubuntu.com/statusNotifierWatcher.js:170
 (0x7f99a61956f8 @ 68)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #10 0x7ffefdb045a0 I   
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f9bb40b5de0 @ 71)
Apr  4 01:15:43 cerberus org.gnome.Shell.desktop[4263]: #11 0x7ffefdb04670 b   
self-hosted:918 (0x7f9bb40f12b8 @ 394)
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Activating service name='org.gnome.ControlCenter.SearchProvider' requested by 
':1.25' (uid=1000 pid=4263 comm="/usr/bin/gnome-shell " label="unconfined")
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Activating service name='org.gnome.Nautilus' requested by ':1.25' (uid=1000 
pid=4263 comm="/usr/bin/gnome-shell " label="unconfined")
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Activating service name='org.gnome.Calculator.SearchProvider' requested by 
':1.25' (uid=1000 pid=4263 comm="/usr/bin/gnome-shell " label="unconfined")
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Activating service name='org.gnome.Calendar' requested by ':1.25' (uid=1000 
pid=4263 comm="/usr/bin/gnome-shell " label="unconfined")
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Activating service name='org.gnome.seahorse.Application' requested by ':1.25' 
(uid=1000 pid=4263 comm="/usr/bin/gnome-shell " label="unconfined")
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Successfully activated service 'org.gnome.Calculator.SearchProvider'
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Successfully activated service 'org.gnome.ControlCenter.SearchProvider'
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Successfully activated service 'org.gnome.Nautilus'
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Successfully activated service 'org.gnome.Calendar'
Apr  4 01:16:15 cerberus dbus-daemon[4041]: [session uid=1000 pid=4041] 
Successfully activated service 'org.gnome.seahorse.Application'

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.28.4-0ubuntu18.04.3
ProcVersionSignature: Ubuntu 4.15.0-94.95-generic 4.15.18
Uname: Linux 4.15.0-94-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr  4 01:18:18 2020
DisplayManager: gdm3
GsettingsChanges:
 b'org.gnome.shell' b'enabled-extensions' b"['bettervol...@tudmotu.com', 
'shortc...@kyle.aims.ac.za', 'system-moni...@paradoxxx.zero.gmail.com', 
'pomod...@arun.codito.in']"
 b'org.gnome.shell' b'command-history' redacted by apport
 b'org.gnome.shell' b'favorite-apps' redacted by apport
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
 b'org.gnome.desktop.interface' b'clock-show-date' b'true'
InstallationDate: Installed on 2016-05-30 (1404 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to bionic on 2018-09-17 (565 days ago)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic third-party-packages

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https://bugs.launchpad.net/bugs/1870728

Title:
  gnome shell dock disappeared

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