FULL PRODUCT VERSION :
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)


A DESCRIPTION OF THE PROBLEM :
The header for a TableColumn with nested columns is rendered incorrectly when resized.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the program below. Drag the first column (which contains two nested columns) across so that it is positioned in the middle between Column 2 and Column 3. Now click on the right-side of the Column 1 header and resize it to a narrower width...as the width gets smaller and smaller a part of the header will appear to the RIGHT of column 3. This is a rendering bug, nothing should appear to the right of column 3.

This effect seems to disappear after the first time, or if other column changes are made. But it can be reproduced every time by restarting the application and only performing the steps as above.


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.stage.Stage;

public class TableTest extends Application {

  static class Data {
private String name;
public Data(String name) {
this.name = name;
}
  }

  public static void main(String[] args) {
      launch(args);
  }

  @Override
  public void start(Stage stage) {
    TableView<Data> tableView = new TableView<>();
    TableColumn<Data, String> col1 = new TableColumn<>("Column 1");
    TableColumn<Data, String> nestedCol1 = new TableColumn<>("A");
    TableColumn<Data, String> nestedCol2 = new TableColumn<>("B");
    col1.getColumns().add(nestedCol1);
    col1.getColumns().add(nestedCol2);
    TableColumn<Data, String> col2 = new TableColumn<>("Column 2");
    TableColumn<Data, String> col3 = new TableColumn<>("Column 3");
    
    tableView.getColumns().setAll(col1, col2, col3);

    stage.setScene(new Scene(tableView));
    stage.show();

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