IcingTaskManager@json: Fix more invalid object access issues

IcingTaskManager@json/files/IcingTaskManager@json/3.8/appGroup.js

@@ -7,10 +7,9 @@ const Tweener = imports.ui.tweener;
 const DND = imports.ui.dnd;
 const Tooltips = imports.ui.tooltips;
 const PopupMenu = imports.ui.popupMenu;
-const Applet = imports.ui.applet;
 const SignalManager = imports.misc.signalManager;
 
-const {each, find, findIndex, isEqual, setTimeout, throttle, getFocusState, unref} = require('./utils');
+const {each, find, findIndex, isEqual, isFinalized, setTimeout, getFocusState, unref} = require('./utils');
 const {AppMenuButtonRightClickMenu, HoverMenuController, AppThumbnailHoverMenu} = require('./specialMenus');
 const constants = require('./constants');
 const store = require('./store');
@@ -539,6 +538,8 @@ class AppGroup {
   }
 
   resetHoverStatus() {
+    if (isFinalized(this.actor)) return;
+
     let hoverPseudoClass = getPseudoClass(this.state.settings.hoverPseudoClass);
     let focusPseudoClass = getPseudoClass(this.state.settings.focusPseudoClass);
     let activePseudoClass = getPseudoClass(this.state.settings.activePseudoClass);
@@ -962,6 +963,8 @@ class AppGroup {
   }
 
   handleFavorite (changed) {
+    if (isFinalized(this.actor)) return;
+
     if (changed) {
       setTimeout(() => this.listState.trigger('updateAppGroupIndexes', this.groupState.appId), 0);
     }

IcingTaskManager@json/files/IcingTaskManager@json/3.8/specialMenus.js

@@ -1004,7 +1004,7 @@ class WindowThumbnail {
       let [width, height] = windowTexture.get_size();
       this.signals.connect(this.metaWindowActor, 'size-changed', () => this.refreshThumbnail());
       this.signals.connect(this.metaWindowActor, 'destroy', () => {
-        if (this.willUnmount) return;
+        if (this.willUnmount || !this.groupState.trigger) return;
         this.groupState.trigger('removeThumbnailFromMenu', this.metaWindow);
         this.metaWindowActor = null;
       });

IcingTaskManager@json/files/IcingTaskManager@json/3.8/utils.js

@@ -1,3 +1,4 @@
+const GObject = imports.gi.GObject;
 const Gettext = imports.gettext;
 const Mainloop = imports.mainloop;
 
@@ -183,4 +184,8 @@ const getFocusState = function (metaWindow) {
     return true;
   });
   return transientHasFocus;
-};
+};
+
+const isFinalized = function(obj) {
+  return obj && GObject.Object.prototype.toString.call(obj).indexOf('FINALIZED') > -1;
+}

IcingTaskManager@json/files/IcingTaskManager@json/metadata.json

@@ -2,9 +2,9 @@
     "description": "Window list with app grouping and thumbnails",
     "max-instances": -1,
     "name": "Icing Task Manager",
-    "version": "6.3.12",
+    "version": "6.3.13",
     "role": "panellauncher",
     "uuid": "IcingTaskManager@json",
     "multiversion": true,
-    "cinnamon-version": ["2.8", "3.0", "3.2", "3.4", "3.6", "3.8"]
+    "cinnamon-version": ["2.8", "3.0", "3.2", "3.4", "3.6", "3.8", "4.0"]
 }