This "report a bug" has occurred quite a few times when I shut down JOSM. I have no idea why.

[RAytoun]

What steps will reproduce the problem?

What is the expected result?

What happens instead?

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: 2017-02-26 23:10:22 +0100 (Sun, 26 Feb 2017)
Build-Date:2017-02-26 22:34:39
Revision:11639
Relative:URL: ^/trunk

Identification: JOSM/1.5 (11639 en_GB) Windows 10 64-Bit
Memory Usage: 339 MB / 989 MB (128 MB allocated, but free)
Java version: 1.8.0_121-b13, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 1280x720
Maximum Screen Size: 1280x720

Plugins:
+ HouseNumberTaggingTool (32699)
+ ImproveOsm (93)
+ Mapillary (v1.4.0)
+ apache-commons (32994)
+ apache-http (32699)
+ buildings_tools (33004)
+ ejml (32680)
+ fieldpapers (v0.4.1)
+ geochat (33088)
+ geotools (33042)
+ jts (32699)
+ measurement (33088)
+ opendata (33156)
+ terracer (33088)
+ todo (30000)
+ utilsplugin2 (33124)

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

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/AddressValidator&zip=1
- https://github.com/MissingMaps/josm_styles/archive/master.zip

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
- 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
- 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.IllegalArgumentException: Listener Image info (instance of org.openstreetmap.josm.plugins.mapillary.gui.imageinfo.ImageInfoPanel) was not registered before or already removed.


=== REPORTED CRASH DATA ===
DialogsPanel#destroy:
 - dialog: Image info
 - dialog-class: class org.openstreetmap.josm.plugins.mapillary.gui.imageinfo.ImageInfoPanel

BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (18) of main
java.lang.IllegalArgumentException: Listener Image info (instance of org.openstreetmap.josm.plugins.mapillary.gui.imageinfo.ImageInfoPanel) was not registered before or already removed.
	at org.openstreetmap.josm.tools.ListenerList.failRemove(ListenerList.java:134)
	at org.openstreetmap.josm.tools.ListenerList$TracingListenerList.failRemove(ListenerList.java:211)
	at org.openstreetmap.josm.tools.ListenerList.removeListener(ListenerList.java:128)
	at org.openstreetmap.josm.tools.ListenerList$TracingListenerList.removeListener(ListenerList.java:195)
	at org.openstreetmap.josm.data.Preferences.removePreferenceChangeListener(Preferences.java:247)
	at org.openstreetmap.josm.gui.dialogs.ToggleDialog.destroy(ToggleDialog.java:460)
	at org.openstreetmap.josm.gui.dialogs.DialogsPanel.destroy(DialogsPanel.java:326)
	at org.openstreetmap.josm.gui.MapFrame.destroy(MapFrame.java:319)
	at org.openstreetmap.josm.gui.MainPanel.updateContent(MainPanel.java:58)
	at org.openstreetmap.josm.gui.MainPanel$1.afterLastLayerRemoved(MainPanel.java:160)
	at org.openstreetmap.josm.gui.layer.MainLayerManager.realRemoveSingleLayer(MainLayerManager.java:270)
	at org.openstreetmap.josm.gui.layer.LayerManager.realRemoveLayer(LayerManager.java:228)
	at org.openstreetmap.josm.gui.layer.LayerManager.lambda$removeLayer$1(LayerManager.java:214)
	at org.openstreetmap.josm.gui.util.GuiHelper.runInEDTAndWaitWithException(GuiHelper.java:138)
	at org.openstreetmap.josm.gui.layer.LayerManager.removeLayer(LayerManager.java:214)
	at org.openstreetmap.josm.gui.dialogs.layer.DeleteLayerAction.actionPerformed(DeleteLayerAction.java:52)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

[Klumbumbus]

Closed as duplicate of #14438.
It's caused by the mapaillary plugin and it's already fixed. Please update your plugins.