Ensure event listener is a widget before casting #13130

Change-Id: I7f106356116d73eebbfeeee52d61d8d7a7117b3e

diff --git a/client/src/com/vaadin/client/Util.java b/client/src/com/vaadin/client/Util.java
index 89726702320223c16a549e43972205d7d7cd2c5a..55d3d13c19f2de2ade6feb05fc7ca0f352fa3ab5 100644 (file)
--- a/client/src/com/vaadin/client/Util.java
+++ b/client/src/com/vaadin/client/Util.java
@@ -866,7 +866,7 @@ public class Util {
                     element = (Element) element.getParentElement();
                 }
             }
-            if (eventListener != null) {
+            if (eventListener instanceof Widget) {
                 /*
                  * Then find the first widget of type class1 from widget
                  * hierarchy