FULL PRODUCT VERSION :
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.16299.98]

A DESCRIPTION OF THE PROBLEM :
Nashorn crashes with NullPointerException when passed an empty script file:

jjs empty.js

Fails only when file is totally empty, size=0. If file contains a single space character, or a single '0' character, does not crash.

REGRESSION.  Last worked in version 7u79

ADDITIONAL REGRESSION INFORMATION: 
I know the empty file did work OK in a *fairly* recent prior version, but not certain which one. Just tried using java 8 and it failed the same way. Just guessing about java 7.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run:

jjs empty.js

where empty.js is a zero-length file.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should to nothing, and not crash An empty string is a valid JavaScript program.
ACTUAL -
Crashes.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
>jjs empty.js
Exception in thread "main" java.lang.NullPointerException
        at jdk.scripting.nashorn/jdk.nashorn.tools.Shell.preprocessArgs(Shell.java:298)
        at jdk.scripting.nashorn/jdk.nashorn.tools.Shell.makeContext(Shell.java:213)
        at jdk.scripting.nashorn/jdk.nashorn.tools.Shell.run(Shell.java:166)
        at jdk.scripting.nashorn.shell/jdk.nashorn.tools.jjs.Main.main(Main.java:104)
        at jdk.scripting.nashorn.shell/jdk.nashorn.tools.jjs.Main.main(Main.java:80)

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
I use this command to get the Nashorn version from another program:

    jjs -v empty.js

This is the only way I know to get the version. If the "empty.js" argument is omitted, interactive mode is entered.

This used to work with an empty file, but now crashes. Workaround is to put a space in empty.js.