FULL PRODUCT VERSION :
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Ubuntu 16.04 LTS (4.4.0-75-generic)

A DESCRIPTION OF THE PROBLEM :
The undoable property incorrectly changes to true when an empty text field gets the focus.


ERROR MESSAGES/STACK TRACES THAT OCCUR :
To get a stack trace which can be of some help to track where the problem occurs, an exception is thrown and caught in the provided source code:

java.lang.RuntimeException
at com.test.Text.lambda$0(Text.java:30)
at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyBooleanPropertyBase.fireValueChangedEvent(ReadOnlyBooleanPropertyBase.java:72)
at javafx.beans.property.ReadOnlyBooleanWrapper.fireValueChangedEvent(ReadOnlyBooleanWrapper.java:103)
at javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:110)
at javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:144)
at javafx.scene.control.TextInputControl.updateUndoRedoState(TextInputControl.java:1154)
at javafx.scene.control.TextInputControl.updateContent(TextInputControl.java:588)
at javafx.scene.control.TextInputControl.selectRange(TextInputControl.java:1028)
at com.sun.javafx.scene.control.behavior.TextFieldBehavior.lambda$new$186(TextFieldBehavior.java:82)
at javafx.beans.value.WeakChangeListener.changed(WeakChangeListener.java:89)
at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyObjectPropertyBase.fireValueChangedEvent(ReadOnlyObjectPropertyBase.java:74)
at javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:102)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:112)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:146)
at javafx.scene.Scene$KeyHandler.setFocusOwner(Scene.java:3924)
at javafx.scene.Scene$KeyHandler.requestFocus(Scene.java:3971)
at javafx.scene.Scene$KeyHandler.access$1900(Scene.java:3910)
at javafx.scene.Scene.requestFocus(Scene.java:2044)
at javafx.scene.Node.requestFocus(Node.java:7881)
at com.sun.javafx.scene.traversal.TopMostTraversalEngine.focusAndNotify(TopMostTraversalEngine.java:110)
at com.sun.javafx.scene.traversal.TopMostTraversalEngine.traverseToFirst(TopMostTraversalEngine.java:132)
at javafx.scene.Scene.focusInitial(Scene.java:2014)
at javafx.scene.Scene.access$3300(Scene.java:159)
at javafx.scene.Scene$ScenePulseListener.focusCleanup(Scene.java:2364)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2385)
at com.sun.javafx.tk.Toolkit.lambda$runPulse$30(Toolkit.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.Toolkit.runPulse(Toolkit.java:354)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:381)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:510)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:490)
at com.sun.javafx.tk.quantum.QuantumToolkit.lambda$runToolkit$404(QuantumToolkit.java:319)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
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:748)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public void start(Stage pStage) {
final BorderPane pane = new BorderPane();
final Scene scene = new Scene(pane);
pStage.setScene(scene);

TextField tf = new TextField();

pane.setCenter(tf);

tf.undoableProperty().addListener((pObs, pOldVal, pNewVal) -> {
System.err.println("undoable property changed: " + tf.isUndoable());
try {
throw new RuntimeException();
} catch (Exception e) {
e.printStackTrace();
}
});

pStage.show();
}
---------- END SOURCE ----------