Exception for Conflation plugin after JOSM 18193

[nkamapper]

What steps will reproduce the problem?

Start JOSM and open a file.

What is the expected result?

Normal operation.

What happens instead?

Exception, with text referring to Conflation plugin. Updating plugin does not help.
No conflation option in Windows menu.
No further exceptions in JOSM after initial error. File opened correctly.

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: 2021-09-03 03:12:33 +0200 (Fri, 03 Sep 2021)
Build-Date:2021-09-03 01:31:19
Revision:18193
Relative:URL: ^/trunk

Identification: JOSM/1.5 (18193 en_GB) Mac OS X 10.13.6
OS Build number: Mac OS X 10.13.6 (17G14042)
Memory Usage: 1154 MB / 3641 MB (157 MB allocated, but free)
Java version: 1.8.0_291-b10, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.apple.laf.AquaLookAndFeel
Screen: Display 69676352 2560×1440 (scaling 1.00×1.00)
Maximum Screen Size: 2560×1440
Best cursor sizes: 16×16→16×16, 32×32→32×32
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_GB
Numbers with default locale: 1234567890 -> 1234567890
Dataset consistency test: No problems found

Plugins:
+ Mapillary (2.0.0-alpha.36-dirty)
+ PicLayer (1.0.1)
+ SeaChart (35772)
+ apache-commons (35524)
+ apache-http (35589)
+ conflation (0.6.0)
+ ejml (35458)
+ geotools (35458)
+ imagery-xml-bounds (35723)
+ jaxb (35543)
+ jna (35662)
+ jts (35458)
+ opendata (35803)
+ pdfimport (35640)
+ reverter (35732)
+ tageditor (35640)
+ todo (30306)
+ turnlanes (35812)
+ turnlanes-tagging (288)
+ turnrestrictions (35640)
+ utilsplugin2 (35792)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/LaneAttributes&zip=1
+ https://raw.githubusercontent.com/OpenNauticalChart/josm/master/INT-1-preset.xml

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://raw.githubusercontent.com/OpenSeaMap/josm/master/INT1_Seamark.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Enhanced_Lane_and_Road_Attributes&zip=1
- http://osm.wzh.be/josm/different_buildings/different_buildings.mapcss

Last errors/warnings:
- 00009.007 W: Failed to load Mappaint styles from '${HOME}/Kart/Stilsett etc/skiing-anderfo.mapcss'. Exception was: java.nio.file.NoSuchFileException: ${HOME}/Kart/Stilsett etc/skiing-anderfo.mapcss
- 00009.008 E: java.nio.file.NoSuchFileException: ${HOME}/Kart/Stilsett etc/skiing-anderfo.mapcss
- 00114.756 E: Handled by bug report queue: org.openstreetmap.josm.plugins.PluginException: An error occurred in plug-in conflation. Cause: java.lang.reflect.InvocationTargetException. Cause: java.lang.NoClassDefFoundError: org/openstreetmap/josm/Main. Cause: java.lang.ClassNotFoundException: org.openstreetmap.josm.Main



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (20) of main
org.openstreetmap.josm.plugins.PluginException: An error occurred in plug-in conflation
	at org.openstreetmap.josm.plugins.PluginProxy.handlePluginException(PluginProxy.java:60)
	at org.openstreetmap.josm.plugins.PluginProxy.mapFrameInitialized(PluginProxy.java:71)
	at org.openstreetmap.josm.gui.MainPanel.updateContent(MainPanel.java:80)
	at org.openstreetmap.josm.gui.MainPanel$1.beforeFirstLayerAdded(MainPanel.java:157)
	at org.openstreetmap.josm.gui.layer.MainLayerManager.realAddLayer(MainLayerManager.java:281)
	at org.openstreetmap.josm.gui.layer.LayerManager.lambda$addLayer$0(LayerManager.java:218)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	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:74)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
	at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
	at java.awt.Dialog.show(Dialog.java:1084)
	at java.awt.Component.show(Component.java:1671)
	at java.awt.Component.setVisible(Component.java:1623)
	at java.awt.Window.setVisible(Window.java:1014)
	at java.awt.Dialog.setVisible(Dialog.java:1005)
	at org.openstreetmap.josm.gui.progress.swing.PleaseWaitProgressMonitor.lambda$doBeginTask$3(PleaseWaitProgressMonitor.java:255)
	at org.openstreetmap.josm.gui.progress.swing.PleaseWaitProgressMonitor.lambda$doInEDT$0(PleaseWaitProgressMonitor.java:113)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	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:74)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	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)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.openstreetmap.josm.plugins.PluginProxy.mapFrameInitialized(PluginProxy.java:66)
	... 41 more
Caused by: java.lang.NoClassDefFoundError: org/openstreetmap/josm/Main
	at org.openstreetmap.josm.plugins.conflation.ConflationPlugin.mapFrameInitialized(ConflationPlugin.java:23)
	... 46 more
Caused by: java.lang.ClassNotFoundException: org.openstreetmap.josm.Main
	at org.openstreetmap.josm.plugins.PluginClassLoader.loadClass(PluginClassLoader.java:92)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 47 more

=== RUNNING THREADS ===
Thread: AWT-Shutdown (17) of system
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:295)
java.lang.Thread.run(Thread.java:748)

Thread: Timer-0 (55) of main
java.lang.Object.wait(Native Method)
java.util.TimerThread.mainLoop(Timer.java:552)
java.util.TimerThread.run(Timer.java:505)

Thread: DestroyJavaVM (53) of main

Thread: File Watcher (22) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
java.util.concurrent.LinkedBlockingDeque.takeFirst(LinkedBlockingDeque.java:492)
java.util.concurrent.LinkedBlockingDeque.take(LinkedBlockingDeque.java:680)
sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:118)
org.openstreetmap.josm.io.FileWatcher.processEvents(FileWatcher.java:120)
org.openstreetmap.josm.io.FileWatcher$$Lambda$157/1926096844.run(Unknown Source)
java.lang.Thread.run(Thread.java:748)

Thread: Reference Handler (2) of system
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
java.lang.ref.Reference.tryHandlePending(Reference.java:191)
java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)

Thread: main-worker-0 (19) of main
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
java.awt.EventQueue.invokeAndWait(EventQueue.java:1343)
java.awt.EventQueue.invokeAndWait(EventQueue.java:1324)
javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1353)
org.openstreetmap.josm.gui.util.GuiHelper.runInEDTAndWaitWithException(GuiHelper.java:249)
org.openstreetmap.josm.gui.layer.LayerManager.addLayer(LayerManager.java:218)
org.openstreetmap.josm.gui.layer.LayerManager.addLayer(LayerManager.java:207)
org.openstreetmap.josm.gui.io.importexport.GeoJSONImporter.importData(GeoJSONImporter.java:56)
org.openstreetmap.josm.gui.io.importexport.FileImporter.importDataHandleExceptions(FileImporter.java:103)
org.openstreetmap.josm.actions.OpenFileAction$OpenFileTask.importData(OpenFileAction.java:389)
org.openstreetmap.josm.actions.OpenFileAction$OpenFileTask.realRun(OpenFileAction.java:338)
org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:94)
org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:142)
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
java.util.concurrent.FutureTask.run(FutureTask.java:266)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Thread: Finalizer (3) of system
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:216)

Thread: message-notifier-0 (51) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Thread: Weak reference cleaner (24) of main
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
org.openstreetmap.josm.tools.ListenableWeakReference.clean(ListenableWeakReference.java:60)
org.openstreetmap.josm.tools.ListenableWeakReference$$Lambda$201/85748029.run(Unknown Source)
java.lang.Thread.run(Thread.java:748)

Thread: GT authority factory disposer (45) of main
java.lang.Object.wait(Native Method)
java.util.TimerThread.mainLoop(Timer.java:552)
java.util.TimerThread.run(Timer.java:505)

Thread: JCS-ElementEventQueue-Thread-4 (44) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Thread: AppKit Thread (11) of system

Thread: Signal Dispatcher (4) of system

Thread: AWT-EventQueue-0 (20) of main
Stacktrace see above.

Thread: Java2D Disposer (15) of system
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
sun.java2d.Disposer.run(Disposer.java:148)
java.lang.Thread.run(Thread.java:748)

Thread: WeakCollectionCleaner (46) of main
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
org.geotools.util.WeakCollectionCleaner.run(WeakCollectionCleaner.java:65)

Thread: image-fetcher-0 (39) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Thread: Timer-1 (62) of main
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
java.util.TimerThread.mainLoop(Timer.java:526)
java.util.TimerThread.run(Timer.java:505)

Thread: Map Status Collector (63) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
org.openstreetmap.josm.gui.MapStatus$Collector.run(MapStatus.java:438)
java.lang.Thread.run(Thread.java:748)

Thread: TimerQueue (21) of system
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
java.util.concurrent.DelayQueue.take(DelayQueue.java:211)
javax.swing.TimerQueue.run(TimerQueue.java:174)
java.lang.Thread.run(Thread.java:748)

Thread: changeset-updater-0 (52) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Thread: Java2D Queue Flusher (14) of system
java.lang.Object.wait(Native Method)
sun.java2d.opengl.OGLRenderQueue$QueueFlusher.run(OGLRenderQueue.java:203)

[skyper]

The exception is a duplicate of #16771.

Replying to nkamapper:

+ conflation (0.6.0)

This is still the outdated version. It should be 0.6.7. I thought #21403 should have fixed the problem but it looks like it is not working.
Does manually updating in preferences work after disabling the plugin?

[taylor.smock]

We haven't done a release yet with the fix.
Last release was 8 days ago, fix was merged in 5 days ago.

[Don-vip]

fixed in ​https://github.com/JOSM/conflation/releases/tag/v0.6.8