Object St.Label (xxx), has been already deallocated — impossible to access it

[MaesterZ]

My syslog gets show the following error all the time:

gnome-shell[2860]: Object St.Label (0x55969ec97700), 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.
gnome-shell[2860]: st_label_get_text: assertion 'ST_IS_LABEL (label)' failed
gnome-shell[2860]: == Stack trace for context 0x55969bfd3a80 ==
gnome-shell[2860]: #0   5596a0dd65a0 i   /home/david/.local/share/gnome-shell/extensions/unite@hardpixel.eu/window.js:278 (2c8569798f8 @ 103)
gnome-shell[2860]: #1   5596a0dd6510 i   /home/david/.local/share/gnome-shell/extensions/unite@hardpixel.eu/window.js:286 (2c856979970 @ 47)
gnome-shell[2860]: #2   5596a0dd6480 i   /home/david/.local/share/gnome-shell/extensions/unite@hardpixel.eu/window.js:420 (21c7106d02e0 @ 41)
gnome-shell[2860]: #3   7fffc66a7ca0 b   self-hosted:1011 (33cdae306718 @ 454)
gnome-shell[2860]: #4   5596a0dd63c8 i   resource:///org/gnome/shell/ui/main.js:662 (21c7106dba60 @ 244)
gnome-shell[2860]: #5   5596a0dd62b0 i   /usr/share/gnome-shell/extensions/ubuntu-dock@ubuntu.com/appIcons.js:459 (2c8569baf88 @ 1728)
gnome-shell[2860]: #6   5596a0dd6218 i   resource:///org/gnome/shell/ui/appDisplay.js:2209 (3bb2b1630808 @ 35)
gnome-shell[2860]: == Stack trace for context 0x55969bfd3a80 ==
gnome-shell[2860]: #0   5596a0dd65a0 i   /home/david/.local/share/gnome-shell/extensions/unite@hardpixel.eu/window.js:279 (2c8569798f8 @ 156)
gnome-shell[2860]: #1   5596a0dd6510 i   /home/david/.local/share/gnome-shell/extensions/unite@hardpixel.eu/window.js:286 (2c856979970 @ 47)
gnome-shell[2860]: #2   5596a0dd6480 i   /home/david/.local/share/gnome-shell/extensions/unite@hardpixel.eu/window.js:420 (21c7106d02e0 @ 41)
gnome-shell[2860]: #3   7fffc66a7ca0 b   self-hosted:1011 (33cdae306718 @ 454)
gnome-shell[2860]: #4   5596a0dd63c8 i   resource:///org/gnome/shell/ui/main.js:662 (21c7106dba60 @ 244)
gnome-shell[2860]: #5   5596a0dd62b0 i   /usr/share/gnome-shell/extensions/ubuntu-dock@ubuntu.com/appIcons.js:459 (2c8569baf88 @ 1728)
gnome-shell[2860]: #6   5596a0dd6218 i   resource:///org/gnome/shell/ui/appDisplay.js:2209 (3bb2b1630808 @ 35)
gnome-shell[2860]: Object St.Label (0x55969ec97700), 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.
gnome-shell[2860]: st_label_set_text: assertion 'ST_IS_LABEL (label)' failed

Environment:

• Ubuntu 20.04 LTS
• Gnome 3.36.4

Enabled Gnome extensions:

• drive-menu@gnome-shell-extensions.gcampax.github.com
• multi-monitors-add-on@spin83
• ubuntu-appindicators@ubuntu.com
• ubuntu-dock@ubuntu.com
• unite@hardpixel.eu
• user-theme@gnome-shell-extensions.gcampax.github.com

[jonian]

Tested on Ubuntu 20.04 LTS and the issue is not present with the latest unite version.