An Endless OS system was found in the wild with a malformed
.local/share/gnome-shell/notifications which causes _loadNotifications()
to raise an exception. This exception was not previously handled and
bubbles all the way out to gnome_shell_plugin_start(), whereupon the
shell exit(1)s. The user could no longer log into their computer.
Handle exceptions from _loadNotifications(), log them, and attempt to
continue. Ensure that this._isLoading is set to 'false' even on error,
so that future calls to _saveNotifications() can overwrite the (corrupt)
state file.
https://gitlab.gnome.org/GNOME/gnome-shell/issues/1552
e5cde4700f