Bug 880042 - file[multiple] form field nsIFilePicker crash if overriding component has not implemented a domfiles getter. r=smaug

content/html/content/src/HTMLInputElement.cpp

@@ -324,6 +324,10 @@ HTMLInputElement::nsFilePickerShownCallback::Done(int16_t aResult)
     nsresult rv = mFilePicker->GetDomfiles(getter_AddRefs(iter));
     NS_ENSURE_SUCCESS(rv, rv);
 
+    if (!iter) {
+      return NS_OK;
+    }
+
     nsCOMPtr<nsISupports> tmp;
     bool prefSaved = false;
     bool loop = true;