Merge pull request #497 from ZER0/selections-window-null/Bug774301

fix Bug 774301: Many "selections(window) is null" during tests r=@Gozala
mozilla · Jul 17, 2012 · 1725ab5 · 1725ab5
2 parents 1b59f33 + 12aaf84
commit 1725ab5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/packages/addon-kit/lib/selection.js b/packages/addon-kit/lib/selection.js
@@ -35,6 +35,10 @@ let selections = ns();
 observers.add("document-shown", function (document) {
   var window = document.defaultView;
 
+  // We are not interested in documents without valid defaultView
+  if (!window)
+    return;
+
   let selection = selections(window).selection;
 
   // We want to handle only the windows where we added selection's listeners