UnsupportedOperationException deleting a way after validation

[mdk]

What steps will reproduce the problem?

1. Open attached file
2. validate (results in tree warnings)
3. delete way

What is the expected result?

way is deleted

What happens instead?

UnsupportedOperationException while removing entries from validator tree panel.

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: 2016-11-27 02:52:18 +0100 (Sun, 27 Nov 2016)
Build-Date:2016-11-27 02:34:28
Revision:11323
Relative:URL: ^/trunk

Identification: JOSM/1.5 (11323 en) Linux Ubuntu 16.10
Memory Usage: 529 MB / 876 MB (337 MB allocated, but free)
Java version: 1.8.0_111-8u111-b14-2ubuntu0.16.10.2-b14, Oracle Corporation, OpenJDK Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Java package: openjdk-8-jre:i386-8u111-b14-2ubuntu0.16.10.2
VM arguments: [-Djosm.restart=true, -Djosm.dir.name=JOSM-latest, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
+ ColumbusCSV (32885)
+ FastDraw (33004)
+ HouseNumberTaggingTool (32699)
+ OpeningHoursEditor (33004)
+ RoadSigns (33088)
+ apache-commons (32994)
+ apache-http (32699)
+ buildings_tools (33004)
+ contourmerge (1030)
+ imagery-xml-bounds (33004)
+ imagery_offset_db (33004)
+ pbf (33004)
+ poly (33004)
+ public_transport (33088)
+ reltoolbox (33088)
+ reverter (33088)
+ terracer (33088)
+ turnlanes (33088)
+ turnrestrictions (33088)
+ undelete (32699)
+ utilsplugin2 (33088)

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

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

Last errors/warnings:
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- E: Handled by bug report queue: java.lang.UnsupportedOperationException
- E: Handled by bug report queue: java.lang.UnsupportedOperationException
- E: Handled by bug report queue: java.lang.UnsupportedOperationException
- E: Handled by bug report queue: java.lang.UnsupportedOperationException
- E: Handled by bug report queue: java.lang.UnsupportedOperationException
- E: Handled by bug report queue: java.lang.UnsupportedOperationException
- E: Handled by bug report queue: java.lang.UnsupportedOperationException


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (17) of main
java.lang.UnsupportedOperationException
	at java.util.AbstractList.remove(AbstractList.java:161)
	at java.util.AbstractList$Itr.remove(AbstractList.java:374)
	at java.util.AbstractList.removeRange(AbstractList.java:571)
	at java.util.AbstractList.clear(AbstractList.java:234)
	at org.openstreetmap.josm.gui.dialogs.validator.ValidatorTreePanel.primitivesRemoved(ValidatorTreePanel.java:444)
	at org.openstreetmap.josm.data.osm.event.PrimitivesRemovedEvent.fire(PrimitivesRemovedEvent.java:25)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager.fireEvents(DatasetEventManager.java:190)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager.access$200(DatasetEventManager.java:29)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager$EdtRunnable.run(DatasetEventManager.java:42)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[Don-vip]

Closed as duplicate of #14040.

[Klumbumbus]

Really a duplictae? This report is from a version after the fix from #14040.