Closing a notification banner causes a invalid-access error
Open a notification banner and close it using the X button, you'd get
(gnome-shell:27166): Gjs-CRITICAL **: 02:39:29.098: Object St.Widget (0x55d589107d80), 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.
== Stack trace for context 0x55d5873bc500 ==
#0 55d587448540 i /media/M2/GNOME/gnome-shell/js/ui/environment.js:130 (7f95295858b0 @ 401)
#1 55d5874484a8 i /media/M2/GNOME/gnome-shell/js/ui/environment.js:218 (7f9529585ee0 @ 26)
#2 55d5874483f8 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:631 (7f9528dbcdc0 @ 228)
#3 55d587448370 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:578 (7f9528dbcc10 @ 18)
#4 7ffc28e30830 b resource:///org/gnome/gjs/modules/signals.js:142 (7f95295c51f0 @ 386)
#5 55d5874482e8 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:357 (7f9528dbbd30 @ 22)
#6 55d587448270 i /media/M2/GNOME/gnome-shell/js/ui/calendar.js:724 (7f9528db3280 @ 61)
#7 7ffc28e31e90 b resource:///org/gnome/gjs/modules/signals.js:142 (7f95295c51f0 @ 386)
#8 55d5874481d8 i /media/M2/GNOME/gnome-shell/js/ui/messageTray.js:479 (7f9528da8040 @ 61)
#9 55d587448158 i /media/M2/GNOME/gnome-shell/js/ui/calendar.js:718 (7f9528db31f0 @ 63)
#10 7ffc28e33500 b resource:///org/gnome/gjs/modules/signals.js:142 (7f95295c51f0 @ 386)
#11 55d5874480d0 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:357 (7f9528dbbd30 @ 22)
#12 7ffc28e34480 b self-hosted:979 (7f9528923ee0 @ 440)
(gnome-shell:27166): Clutter-CRITICAL **: 02:39:29.099: clutter_actor_restore_easing_state: assertion 'CLUTTER_IS_ACTOR (self)' failed
== Stack trace for context 0x55d5873bc500 ==
#0 55d587448540 i /media/M2/GNOME/gnome-shell/js/ui/environment.js:130 (7f95295858b0 @ 401)
#1 55d5874484a8 i /media/M2/GNOME/gnome-shell/js/ui/environment.js:218 (7f9529585ee0 @ 26)
#2 55d5874483f8 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:631 (7f9528dbcdc0 @ 228)
#3 55d587448370 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:578 (7f9528dbcc10 @ 18)
#4 7ffc28e30830 b resource:///org/gnome/gjs/modules/signals.js:142 (7f95295c51f0 @ 386)
#5 55d5874482e8 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:357 (7f9528dbbd30 @ 22)
#6 55d587448270 i /media/M2/GNOME/gnome-shell/js/ui/calendar.js:724 (7f9528db3280 @ 61)
#7 7ffc28e31e90 b resource:///org/gnome/gjs/modules/signals.js:142 (7f95295c51f0 @ 386)
#8 55d5874481d8 i /media/M2/GNOME/gnome-shell/js/ui/messageTray.js:479 (7f9528da8040 @ 61)
#9 55d587448158 i /media/M2/GNOME/gnome-shell/js/ui/calendar.js:718 (7f9528db31f0 @ 63)
#10 7ffc28e33500 b resource:///org/gnome/gjs/modules/signals.js:142 (7f95295c51f0 @ 386)
#11 55d5874480d0 i /media/M2/GNOME/gnome-shell/js/ui/messageList.js:357 (7f9528dbbd30 @ 22)
#12 7ffc28e34480 b self-hosted:979 (7f9528923ee0 @ 440)