workspaceThumbnails: Avoid access to undefined variables

If thumbnails haven't been created, they don't need to be destroyed. https://bugzilla.gnome.org/show_bug.cgi?id=787871
2017-09-20 09:05:16 +08:00 · 2017-09-20 09:05:16 +08:00 · 594cc7cbef
commit 594cc7cbef
parent 0932324d39
1 changed files with 3 additions and 0 deletions
--- a/js/ui/workspaceThumbnail.js
+++ b/js/ui/workspaceThumbnail.js
@ -884,6 +884,9 @@ var ThumbnailsBox = new Lang.Class({
    },

    _destroyThumbnails() {
+        if (this._thumbnails.length == 0)
+            return;
+
        if (this._switchWorkspaceNotifyId > 0) {
            global.window_manager.disconnect(this._switchWorkspaceNotifyId);
            this._switchWorkspaceNotifyId = 0;