src/java.desktop/unix/classes/sun/awt/X11/XWM.java

@@ -1,7 +1,7 @@
  /*
-  * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
+  * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this

@@ -546,10 +546,16 @@
                          {
                              return true;
                          }
                      } finally {
                          state_getter.dispose();
+                     }
+                     XQueryTree qt = new XQueryTree(wmwin);
+                     try {
+                         if (qt.execute() > 0) return true;
+                     } finally {
+                         qt.dispose();
                      }
                  }
              }
          } finally {
              getter.dispose();