IllegalArgumentException: null primitive in selection

[gaben]

What steps will reproduce the problem?

1. Download this relation ​https://www.openstreetmap.org/relation/10975571
2. Run validator
3. Apply PT assistant auto fix

What is the expected result?

No crash

What happens instead?

A nice exception

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

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-08-31 22:55:53 +0200 (Mon, 31 Aug 2020)
Build-Date:2020-09-01 01:30:50
Revision:16996
Relative:URL: ^/trunk

Identification: JOSM/1.5 (16996 hu) Windows 10 64-Bit
OS Build number: Windows 10 Pro for Workstations 2004 (19041)
Memory Usage: 1531 MB / 1820 MB (504 MB allocated, but free)
Java version: 1.8.0_261-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920x1200 (scaling 1.0x1.0)
Maximum Screen Size: 1920x1200
Best cursor sizes: 16x16 -> 32x32, 32x32 -> 32x32
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=%UserProfile%\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\31\583aa85f-29eff323, -Djnlpx.remove=false, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.heapsize=NULL,2048m, -Djnlpx.splashport=49292, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm-latest.jnlp, -Djnlpx.jvm=<java.home>\bin\javaw.exe]
Dataset consistency test: No problems found

Plugins:
+ ImportImagePlugin (35248)
+ OpeningHoursEditor (35414)
+ apache-commons (35524)
+ buildings_tools (35500)
+ continuosDownload (91)
+ ejml (35313)
+ geotools (35169)
+ gridify (1588746833)
+ jaxb (35092)
+ jts (35122)
+ log4j (35092)
+ opendata (35513)
+ pt_assistant (2.1.10-80-g7d9bba3)
+ reverter (35499)
+ tageditor (35258)
+ turnlanes-tagging (283)
+ utilsplugin2 (35487)
+ wikipedia (1.1.4)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/LaneAttributes&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/Healthcare&zip=1

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Surface&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Surface-DataEntry&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1

Last errors/warnings:
- 00034,137 W: Unsupported match type class org.openstreetmap.josm.data.osm.search.SearchCompiler$Any: opening_hours
- 00942,707 E: Handled by bug report queue: java.lang.IllegalArgumentException: null primitive in selection


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-2 (57) of javawsApplicationThreadGroup
java.lang.IllegalArgumentException: null primitive in selection
	at org.openstreetmap.josm.command.SelectCommand.<init>(SelectCommand.java:38)
	at org.openstreetmap.josm.plugins.pt_assistant.validation.Checker.fixErrorByZooming(Checker.java:150)
	at org.openstreetmap.josm.plugins.pt_assistant.validation.SegmentChecker.fixError(SegmentChecker.java:831)
	at org.openstreetmap.josm.plugins.pt_assistant.validation.PTAssistantValidatorTest.fixError(PTAssistantValidatorTest.java:513)
	at org.openstreetmap.josm.data.validation.TestError.getFix(TestError.java:433)
	at org.openstreetmap.josm.gui.dialogs.ValidatorDialog$FixTask.fixError(ValidatorDialog.java:630)
	at org.openstreetmap.josm.gui.dialogs.ValidatorDialog$FixTask.realRun(ValidatorDialog.java:658)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:94)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:142)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)