lookingGlass: Throw a clearer error on referencing invalid result index

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/700

diff --git a/js/ui/lookingGlass.js b/js/ui/lookingGlass.js
index a53fd90db7bf52fedc0cf77c3d479c18765b1991..2c1239cd5f86de76da2f4359eca57432eba21e37 100644 (file)
--- a/js/ui/lookingGlass.js
+++ b/js/ui/lookingGlass.js
@@ -1010,7 +1010,11 @@ var LookingGlass = class LookingGlass {
     }
 
     getResult(idx) {
-        return this._results[idx - this._offset].o;
+        try {
+            return this._results[idx - this._offset].o;
+        } catch (e) {
+            throw new Error(`Unknown result at index ${idx}`);
+        }
     }
 
     toggle() {