src/macosx/classes/sun/lwawt/macosx/CToolkitThreadBlockedHandler.java

*** 26,36 ****
  package sun.lwawt.macosx;
  
  import sun.awt.datatransfer.ToolkitThreadBlockedHandler;
  
  final class CToolkitThreadBlockedHandler implements ToolkitThreadBlockedHandler {
!     private final LWCToolkit toolkit = (LWCToolkit)java.awt.Toolkit.getDefaultToolkit();
  
      public void lock() {
      }
  
      public void unlock() {
--- 26,39 ----
  package sun.lwawt.macosx;
  
  import sun.awt.datatransfer.ToolkitThreadBlockedHandler;
  
  final class CToolkitThreadBlockedHandler implements ToolkitThreadBlockedHandler {
!     private final LWCToolkit toolkit =
!             java.awt.Toolkit.getDefaultToolkit() instanceof LWCToolkit
!                     ? (LWCToolkit)java.awt.Toolkit.getDefaultToolkit()
!                     : null;
  
      public void lock() {
      }
  
      public void unlock() {
*** 42,52 ****
--- 45,57 ----
  
      public void enter() {
          // Despite the naming of this method, on MacOS only one
          // event is read and dispatched before this method returns.
          // This call is non-blocking and does not wait for an event
+         if (toolkit != null) {
              toolkit.startNativeNestedEventLoop();
          }
+     }
  
      public void exit() {
      }
  }