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

*** 50,59 ****
--- 50,61 ----
          fDropTarget = dropTarget;
          fComponent = component;
          fPeer = peer;
  
          long nativePeer = CPlatformWindow.getNativeViewPtr(((LWComponentPeer) peer).getPlatformWindow());
+         if (nativePeer == 0L) return; // Unsupported
+ 
          // Create native dragging destination:
          fNativeDropTarget = this.createNativeDropTarget(dropTarget, component, peer, nativePeer);
          if (fNativeDropTarget == 0) {
              throw new IllegalStateException("CDropTarget.createNativeDropTarget() failed.");
          }