unhandled exception on closing the relation editor

[dieterdreist]

What steps will reproduce the problem?

1. open relation editor
2. do nothing there
3. close it

What is the expected result?

nothing

What happens instead?

unhandled exception, I got it yesterday and today again

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: 2016-06-24 01:49:51 +0200 (Fri, 24 Jun 2016)
Build-Date:2016-06-24 01:34:30
Revision:10473
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10473 en) Mac OS X 10.11.5
Memory Usage: 827 MB / 1820 MB (694 MB allocated, but free)
Java version: 1.8.0_66-b17, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-Dsun.java2d.opengl=true]
Dataset consistency test: No problems found

Plugins:
- TombPlugin (46)
- alignways (32161)
- apache-commons (32158)
- apache-http (32158)
- buildings_tools (32158)
- ejml (32158)
- geochat (32158)
- geotools (31895)
- imagery_offset_db (32158)
- jts (31906)
- opendata (32289)
- print (32191)
- proj4j (32158)
- reltoolbox (32158)
- reverter (32158)
- undelete (32158)
- utilsplugin2 (32158)

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

Last errors/warnings:
- W: Old style SideButton usage for action org.openstreetmap.josm.gui.help.ContextSensitiveHelpAction@485a0191
- W: Old style SideButton usage for action org.openstreetmap.josm.gui.io.UploadDialog$UploadAction@6ea31dc3
- W: Old style SideButton usage for action org.openstreetmap.josm.gui.io.UploadDialog$CancelAction@57051890
- W: Old style SideButton usage for action org.openstreetmap.josm.gui.help.ContextSensitiveHelpAction@f23be8f
- E: java.lang.IllegalArgumentException: Listener was not registered before: org.openstreetmap.josm.actions.ZoomToAction@60822762

java.lang.IllegalArgumentException: Listener was not registered before: org.openstreetmap.josm.actions.ZoomToAction@60822762
	at org.openstreetmap.josm.gui.layer.LayerManager.removeLayerChangeListener(LayerManager.java:345)
	at org.openstreetmap.josm.gui.layer.LayerManager.removeLayerChangeListener(LayerManager.java:333)
	at org.openstreetmap.josm.gui.widgets.OsmPrimitivesTable.unregisterListeners(OsmPrimitivesTable.java:105)
	at org.openstreetmap.josm.gui.dialogs.relation.MemberTable.unregisterListeners(MemberTable.java:142)
	at org.openstreetmap.josm.gui.dialogs.relation.GenericRelationEditor.setVisible(GenericRelationEditor.java:758)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.SavingAction.hideEditor(SavingAction.java:191)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.OKAction.actionPerformed(OKAction.java:46)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
	at java.awt.Component.processMouseEvent(Component.java:6535)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
	at java.awt.Component.processEvent(Component.java:6300)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4891)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
	at java.awt.Container.dispatchEventImpl(Container.java:2280)
	at java.awt.Window.dispatchEventImpl(Window.java:2750)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	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:76)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	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)

[stoecker]

Closed as duplicate of #13040.