scripting: no output in plugin's console

[TobWen]

What steps will reproduce the problem?

1. Load "scripting" plugin
2. Load "jython" using scripting's GUI
3. Switch "scripting" from JS Rhino to Python language
4. Try to run this script: print "Hello world!"

What is the expected result?

The string "Hello world" in the log window of "scripting" plugin.

What happens instead?

No output in script's console log window.

Please provide any additional information below. Attach a screenshot if possible.

See screenshot. No entry in JOSM's log.

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-03-30 22:28:45 +0200 (Wed, 30 Mar 2016)
Build-Date:2016-03-31 01:32:47
Revision:10089
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10089 de) Windows 7 64-Bit
Memory Usage: 152 MB / 247 MB (41 MB allocated, but free)
Java version: 1.8.0_77-b03, Oracle Corporation, Java HotSpot(TM) Client VM
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:C:\Program Files (x86)\Java\jre1.8.0_77\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=C:\Users\Velix\AppData\Local\Temp\josm-latest-1.jnlp, -Djnlpx.remove=false, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.splashport=50950, -Djnlpx.jvm=<java.home>\bin\javaw.exe, -Djnlpx.vmargs=LURqYXZhLnV0aWwuQXJyYXlzLnVzZUxlZ2FjeU1lcmdlU29ydD10cnVlAA==]
Dataset consistency test: No problems found

Plugins:
- ejml (31895)
- geotools (31895)
- jts (31772)
- log4j (31895)
- reltoolbox (31895)
- scripting (30722)
- splinex (31895)
- utilsplugin2 (32099)

Last errors/warnings: