FULL PRODUCT VERSION :
java version "1.8.0_102"
Java(TM) SE Runtime Environment (build 1.8.0_102-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.102-b14, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux engel-cc300-virtualbox 3.2.0-58-generic #88-Ubuntu SMP Tue Dec 3 17:37:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Accessing the selectedTextProperty of the TextField control during a ChangeListener or InvalidationListener may cause a StringOutOfBoundsException.
Please see the attached Test code for details. (Note: the tests depend on TestFX 4.0.4-alpha)




ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.StringIndexOutOfBoundsException: String index out of range: 9
at java.lang.String.substring(String.java:1963)
at javafx.scene.control.TextInputControl$2.computeValue(TextInputControl.java:164)
at javafx.beans.binding.StringBinding.get(StringBinding.java:152)
at javafx.beans.binding.StringBinding.get(StringBinding.java:61)
at javafx.beans.binding.StringExpression.getValue(StringExpression.java:51)
at javafx.beans.binding.StringExpression.getValue(StringExpression.java:47)
at javafx.beans.property.StringPropertyBase.get(StringPropertyBase.java:130)
at javafx.beans.property.ReadOnlyStringWrapper$ReadOnlyPropertyImpl.get(ReadOnlyStringWrapper.java:111)
at javafx.beans.property.ReadOnlyStringWrapper$ReadOnlyPropertyImpl.get(ReadOnlyStringWrapper.java:107)
at javafx.beans.property.ReadOnlyStringProperty.toString(ReadOnlyStringProperty.java:64)
at test.TextFieldIssueTest$1.invalidated(TextFieldIssueTest.java:81)
at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:137)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyStringPropertyBase.fireValueChangedEvent(ReadOnlyStringPropertyBase.java:72)
at javafx.beans.property.ReadOnlyStringWrapper.fireValueChangedEvent(ReadOnlyStringWrapper.java:103)
at javafx.beans.property.StringPropertyBase.markInvalid(StringPropertyBase.java:110)
at javafx.beans.property.StringPropertyBase.access$000(StringPropertyBase.java:49)
at javafx.beans.property.StringPropertyBase$Listener.invalidated(StringPropertyBase.java:230)
at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:137)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.binding.StringBinding.invalidate(StringBinding.java:171)
at com.sun.javafx.binding.BindingHelperObserver.invalidated(BindingHelperObserver.java:51)
at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:349)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.scene.control.TextInputControl$TextProperty.fireValueChangedEvent(TextInputControl.java:1389)
at javafx.scene.control.TextInputControl$TextProperty.markInvalid(TextInputControl.java:1393)
at javafx.scene.control.TextInputControl$TextProperty.controlContentHasChanged(TextInputControl.java:1332)
at javafx.scene.control.TextInputControl$TextProperty.access$1600(TextInputControl.java:1300)
at javafx.scene.control.TextInputControl.lambda$new$162(TextInputControl.java:139)
at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:137)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.scene.control.TextField$TextFieldContent.insert(TextField.java:87)
at javafx.scene.control.TextInputControl.replaceText(TextInputControl.java:1204)
at javafx.scene.control.TextInputControl.updateContent(TextInputControl.java:556)
at javafx.scene.control.TextInputControl.replaceText(TextInputControl.java:548)
at com.sun.javafx.scene.control.skin.TextFieldSkin.replaceText(TextFieldSkin.java:576)
at com.sun.javafx.scene.control.behavior.TextFieldBehavior.replaceText(TextFieldBehavior.java:202)
at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.defaultKeyTyped(TextInputControlBehavior.java:238)
at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.callAction(TextInputControlBehavior.java:139)
at com.sun.javafx.scene.control.behavior.BehaviorBase.callActionForEvent(BehaviorBase.java:218)
at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.callActionForEvent(TextInputControlBehavior.java:127)
at com.sun.javafx.scene.control.behavior.BehaviorBase.lambda$new$74(BehaviorBase.java:135)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$KeyHandler.process(Scene.java:3964)
at javafx.scene.Scene$KeyHandler.access$1800(Scene.java:3910)
at javafx.scene.Scene.impl_processKeyEvent(Scene.java:2040)
at javafx.scene.Scene$ScenePeerListener.keyEvent(Scene.java:2501)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:216)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:148)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleKeyEvent$353(GlassViewEventHandler.java:247)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleKeyEvent(GlassViewEventHandler.java:246)
at com.sun.glass.ui.View.handleKeyEvent(View.java:546)
at com.sun.glass.ui.View.notifyKey(View.java:966)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)
at java.lang.Thread.run(Thread.java:745)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package test;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.junit.Test;
import org.testfx.framework.junit.ApplicationTest;
import org.testfx.util.WaitForAsyncUtils;

import javafx.application.Platform;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.control.TextInputControl;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class TextFieldIssueTest extends ApplicationTest
{

  private final static Logger LOGGER = Logger.getLogger(TextFieldIssueTest.class.getName());
  static
  {
    Thread.setDefaultUncaughtExceptionHandler(TextFieldIssueTest::handleError);
  }

  private static Throwable unchaughtException;
  private TextInputControl textField;

  private static void handleError(Thread t, Throwable e)
  {
    unchaughtException = e;
    LOGGER.log(Level.SEVERE, "Unchaught exception observed!", e);
  }

  @Override
  public void start(Stage stage) throws Exception
  {
    // reset exception
    unchaughtException = null;

    VBox vBox = new VBox();
    textField = new TextField();
    textField.setText("1234 5678");
    vBox.getChildren()
        .add(textField);

    Scene scene = new Scene(vBox);
    stage.setScene(scene);
    stage.show();
  }

  @Test
  public void test_fail_case01()
  {
    LOGGER.info("Running test 'fail_case01'!");
    textField.selectedTextProperty()
        .addListener(this::handleSelectionChanged);

    doSelectAndReplace();
  }

  @Test
  public void test_fail_case02()
  {
    LOGGER.info("Running test 'fail_case02'!");
    textField.selectedTextProperty()
        .addListener(new InvalidationListener()
        {
          @Override
          public void invalidated(Observable observable)
          {
            // accessing the selectedTextProperty causes a
            // StringOutOfBoundsException
            observable.toString();
          }
        });
    doSelectAndReplace();
  }

  @Test
  public void test_fail_workaround()
  {
    LOGGER.info("Running test 'fail_case02'!");
    textField.selectedTextProperty()
        .addListener(new InvalidationListener()
        {
          @Override
          public void invalidated(Observable observable)
          {
            // workaround: ensure that state of selected text property is
            // accessed later
            Platform.runLater(() -> observable.toString());
          }
        });

    doSelectAndReplace();
  }

  private void handleSelectionChanged(ObservableValue<? extends String> observable, String oldValue, String newValue)
  {
    // internally the selectedTextProperty is accessed to get the current value
    // from which
    // causes the StringOutOfBoundsException
  }

  private void doSelectAndReplace()
  {
    textField.positionCaret(5);
    WaitForAsyncUtils.waitForFxEvents();

    // select 2nd word
    textField.selectNextWord();
    WaitForAsyncUtils.waitForFxEvents();

    // replace selection
    type(KeyCode.DIGIT0);
    WaitForAsyncUtils.waitForFxEvents();

    assert (unchaughtException == null);
  }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
use InvalidationListener instead of ChangeListener and encapsulate access to selectedTextProperty in Platform.runLater (see provided test cases)