FULL PRODUCT VERSION :
1.8 0_51, 1.8 0_40

ADDITIONAL OS VERSION INFORMATION :
Windows 10, 8.1

A DESCRIPTION OF THE PROBLEM :
When clocking on a ComboBox that is not in focus, the application crashes. Does not happen if the CB is in focus.

REGRESSION. Last worked in version 8u25

ADDITIONAL REGRESSION INFORMATION:
1.8 0_25

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
See source code. Run and click on ComboBox

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Normal CB operation
ACTUAL -
Application freezes and crashes

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class TestCMB extends Application {



public static void main(String[] args) {
        launch(args);
    }
    @Override
    public void start(Stage primaryStage) {
    
     HBox root = new HBox(10);
     Scene scene = new Scene(root);
     Button b = new Button("Click");
     ComboBox<String> cmb = new ComboBox<String>();
     cmb.getItems().addAll("item 1","item 2", "item 3");
     root.getChildren().addAll(b,cmb);

        primaryStage.setScene(scene);
        primaryStage.show();
    }

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Have not found