ADDITIONAL SYSTEM INFORMATION :
Operating System: Manjaro Linux
KDE Plasma Version: 5.17.2
KDE Frameworks Version: 5.63.0
Qt Version: 5.13.1
Kernel Version: 5.2.21-1-MANJARO
OS Type: 64-bit
Processors: 12 × Intel® Core™ i7-8700K CPU @ 3.70GHz
Memory: 14,6 GiB of RAM

openjdk 13.0.1 2019-10-15
OpenJDK Runtime Environment (build 13.0.1+9)
OpenJDK 64-Bit Server VM (build 13.0.1+9, mixed mode)

JavaFX 13
com.sun.javafx.runtime.VersionInfo.getRuntimeVersion(): 13+14

A DESCRIPTION OF THE PROBLEM :
Trying to open DirectoryChooser results in segmentation fault and core dump.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Reproducer:
1) git clone https://github.com/JavaSaBr/JME3-JFX
2) modify `./src/test/java/com/jme3/jfx/TestJmeToJfxCanvas.java`: add action to button to open chooser dialog:
```
        button.setOnAction(event -> {
            DirectoryChooser directoryChooser = new DirectoryChooser();
            File selectedDirectory = directoryChooser.showDialog(stage);
        });
```
3) Run this class and click on "BUTTON" button. You will got SIGSEGV.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Open dialog to let user choose directory
ACTUAL -
Segmentation fault

---------- BEGIN SOURCE ----------
https://github.com/JavaSaBr/JME3-JFX with modification, see Steps to Reproduce. Executable is `./src/test/java/com/jme3/jfx/TestJmeToJfxCanvas.java`
---------- END SOURCE ----------

FREQUENCY : always