NPE at RestartAction.getCommands

[Zian]

What steps will reproduce the problem?

1. Launch JOSM from the Start menu

What is the expected result?

JOSM should start and show the main window.

What happens instead?

I got the Report a Bug dialog.

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

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2018-01-28 23:08:56 +0100 (Sun, 28 Jan 2018)
Build-Date:2018-01-28 22:25:44
Revision:13367
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13367 en) Windows 7 64-Bit
OS Build number: Windows 7 Ultimate (7601)
Memory Usage: 590 MB / 1751 MB (296 MB allocated, but free)
Java version: 1.8.0_162-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1600x900, \Display1 1080x1920
Maximum Screen Size: 1600x1920
VM arguments: [-Djava.security.manager, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djava.util.Arrays.useLegacyMergeSort=true, --add-modules=java.activation,java.se.ee, --add-exports=java.base/sun.security.util=ALL-UNNAMED, --add-exports=java.base/sun.security.x509=ALL-UNNAMED, --add-exports=java.desktop/com.apple.eawt=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED, --add-exports=javafx.graphics/com.sun.javafx.application=ALL-UNNAMED, --add-exports=jdk.deploy/com.sun.deploy.config=ALL-UNNAMED, --add-opens=java.base/java.lang=ALL-UNNAMED, --add-opens=java.base/jdk.internal.loader=ALL-UNNAMED, --add-opens=java.desktop/javax.imageio.spi=ALL-UNNAMED, --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED, --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED, -Djnlpx.jvm=<java.home>\bin\javaw.exe, -Djnlpx.home=C:\Program Files\Java\jre-9.0.4, -Djnlpx.remove=false, -Djnlpx.offline=false, -Djnlpx.relaunch=true, -Djnlpx.session.data=%UserProfile%\AppData\Local\Temp\session15958746287723477156, -Djnlpx.heapsize=NULL,NULL, -DtrustProxy=true, -Djnlpx.origFilenameArg=%UserProfile%\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\56\1ee8cfb8-36f47514, exit]

Plugins:
+ ElevationProfile (33815)
+ InfoMode (33722)
+ Mapillary (v1.5.10)
+ OpeningHoursEditor (33876)
+ apache-commons (33668)
+ apache-http (32699)
+ buildings_tools (34040)
+ imagery_offset_db (33774)
+ measurement (33760)
+ scoutsigns (116)
+ utilsplugin2 (33991)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Fixme&zip=1
+ https://raw.githubusercontent.com/species/josm-preset-traffic_sign_direction/master/direction.mapcss
+ https://josm.openstreetmap.de/josmfile?page=Styles/Traffic_signs&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransportV2&zip=1

Last errors/warnings:
- E: Handled by bug report queue: java.lang.NullPointerException
- W: java.io.IOException: The requested URL https://josm.openstreetmap.de/josmfile?page=Styles/Traffic_signs&zip=1 was not found
- W: Failed to load Mappaint styles from 'https://josm.openstreetmap.de/josmfile?page=Styles/Traffic_signs&zip=1'. Exception was: java.io.IOException: The requested URL https://josm.openstreetmap.de/josmfile?page=Styles/Traffic_signs&zip=1 was not found
- E: java.io.IOException: The requested URL https://josm.openstreetmap.de/josmfile?page=Styles/Traffic_signs&zip=1 was not found
- W: Initializing map style https://josm.openstreetmap.de/josmfile?page=Styles/Traffic_signs&zip=1 completed in 192 ms (1 errors, 0 warnings)
- W: No configuration settings found.  Using hardcoded default values for all pools.


=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: IPv6-checker (39)
java.lang.NullPointerException
	at org.openstreetmap.josm.actions.RestartAction.getCommands(RestartAction.java:139)
	at org.openstreetmap.josm.actions.RestartAction.restartJOSM(RestartAction.java:95)
	at org.openstreetmap.josm.gui.MainApplication.lambda$checkIPv6$20(MainApplication.java:1293)
	at java.lang.Thread.run(Unknown Source)

[Zian]

Screenshot of the JOSM Report a Bug dialog

[Don-vip]

In 13393/josm:

fix #15898 - robustness when sun.java.command property cannot be retrieved