Linux, JDK 9.0.1 - No results are displayed

Here is what happens when I try it:
```
$ sh scripts/jfxshell.sh |  Welcome to JShell -- Version 9.0.1
|  For an introduction type: /help intro

jshell> Label label = new Label("Fred")
label ==> 

jshell> label.getText()
$2 ==> 

jshell> 6 * 7
$3 ==> 
```
