grabHelper is passing a boolean argument to onUngrab() callback function and since commit 1acbdcc9b3b0 we'd end up adding it to to the callback list or we'd try to invoke it: (gnome-shell:3490851): Gjs-CRITICAL **: 17:19:20.460: JS ERROR: TypeError: func is not a function onComplete/<@/media/M2/GNOME/gnome-shell/js/ui/appDisplay.js:2407:56 onComplete@/media/M2/GNOME/gnome-shell/js/ui/appDisplay.js:2407:40 _makeEaseCallback/<@/media/M2/GNOME/gnome-shell/js/ui/environment.js:85:13 _easeActor/<@/media/M2/GNOME/gnome-shell/js/ui/environment.js:170:64 Use an arrow function so that we can control the parameters we pass to popdown. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1635>
GNOME Shell
GNOME Shell provides core user interface functions for the GNOME 3 desktop, like switching to windows and launching applications. GNOME Shell takes advantage of the capabilities of modern graphics hardware and introduces innovative user interface concepts to provide a visually attractive and easy to use experience.
For more information about GNOME Shell, including instructions on how to build GNOME Shell from source and how to get involved with the project, see the project wiki.
Bugs should be reported to the GNOME bug tracking system.
Contributing
To contribute, open merge requests at https://gitlab.gnome.org/GNOME/gnome-shell.
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License
GNOME Shell is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for details.