repeated crash with tested

[map-dude]

What steps will reproduce the problem?

1. again, deletion of object attribute

What is the expected result?

What happens instead?

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

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-07-03 22:03:52
Last Changed Author: Don-vip
Revision: 7287
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-07-04 00:00:19 +0200 (Fri, 04 Jul 2014)
Last Changed Rev: 7287

Identification: JOSM/1.5 (7287 en) Linux openSUSE 12.3 (x86_64)
Memory Usage: 252 MB / 1778 MB (84 MB allocated, but free)
Java version: 1.7.0_51, Oracle Corporation, OpenJDK 64-Bit Server VM
VM arguments: [-Xbootclasspath/a:/usr/share/icedtea-web/netx.jar:/usr/share/java/js.jar, -Xms8m, -Dicedtea-web.bin.name=javaws, -Dicedtea-web.bin.location=/usr/bin/javaws]
Dataset consistency test: No problems found

Plugin: buildings_tools (30485)
Plugin: geochat (30416)

java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at java.util.TimSort.mergeLo(TimSort.java:747)
	at java.util.TimSort.mergeAt(TimSort.java:483)
	at java.util.TimSort.mergeCollapse(TimSort.java:410)
	at java.util.TimSort.sort(TimSort.java:214)
	at java.util.TimSort.sort(TimSort.java:173)
	at java.util.Arrays.sort(Arrays.java:659)
	at java.util.Collections.sort(Collections.java:217)
	at javax.swing.SortingFocusTraversalPolicy.enumerateAndSortCycle(SortingFocusTraversalPolicy.java:136)
	at javax.swing.SortingFocusTraversalPolicy.getFocusTraversalCycle(SortingFocusTraversalPolicy.java:110)
	at javax.swing.SortingFocusTraversalPolicy.getComponentAfter(SortingFocusTraversalPolicy.java:280)
	at javax.swing.LayoutFocusTraversalPolicy.getComponentAfter(LayoutFocusTraversalPolicy.java:106)
	at java.awt.Component.getNextFocusCandidate(Component.java:7860)
	at java.awt.Component.transferFocus(Component.java:7828)
	at java.awt.Component.disable(Component.java:1517)
	at javax.swing.JComponent.disable(JComponent.java:3625)
	at java.awt.Component.enable(Component.java:1495)
	at java.awt.Component.setEnabled(Component.java:1458)
	at javax.swing.JComponent.setEnabled(JComponent.java:2667)
	at javax.swing.AbstractButton.setEnabled(AbstractButton.java:2087)
	at javax.swing.AbstractAction.setEnabledFromAction(AbstractAction.java:102)
	at javax.swing.AbstractButton.actionPropertyChanged(AbstractButton.java:1216)
	at javax.swing.AbstractButton$ButtonActionPropertyChangeListener.actionPropertyChanged(AbstractButton.java:1361)
	at javax.swing.AbstractButton$ButtonActionPropertyChangeListener.actionPropertyChanged(AbstractButton.java:1350)
	at javax.swing.ActionPropertyChangeListener.propertyChange(ActionPropertyChangeListener.java:88)
	at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
	at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:92)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
	at javax.swing.AbstractAction.firePropertyChange(AbstractAction.java:276)
	at javax.swing.AbstractAction.setEnabled(AbstractAction.java:236)
	at org.openstreetmap.josm.gui.dialogs.properties.PropertiesDialog$DeleteAction.updateEnabledState(PropertiesDialog.java:984)
	at org.openstreetmap.josm.gui.dialogs.properties.PropertiesDialog$DeleteAction.valueChanged(PropertiesDialog.java:992)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:164)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:211)
	at javax.swing.DefaultListSelectionModel.removeIndexInterval(DefaultListSelectionModel.java:677)
	at javax.swing.JTable.tableRowsDeleted(JTable.java:4509)
	at javax.swing.JTable.tableChanged(JTable.java:4412)
	at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:296)
	at javax.swing.table.AbstractTableModel.fireTableRowsDeleted(AbstractTableModel.java:261)
	at javax.swing.table.DefaultTableModel.setNumRows(DefaultTableModel.java:321)
	at javax.swing.table.DefaultTableModel.setRowCount(DefaultTableModel.java:339)
	at org.openstreetmap.josm.gui.dialogs.properties.PropertiesDialog.selectionChanged(PropertiesDialog.java:603)
	at org.openstreetmap.josm.gui.dialogs.properties.PropertiesDialog.updateSelection(PropertiesDialog.java:527)
	at org.openstreetmap.josm.gui.dialogs.properties.PropertiesDialog.processDatasetEvent(PropertiesDialog.java:726)
	at org.openstreetmap.josm.data.osm.event.DataSetListenerAdapter.tagsChanged(DataSetListenerAdapter.java:49)
	at org.openstreetmap.josm.data.osm.event.TagsChangedEvent.fire(TagsChangedEvent.java:24)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager.fireConsolidatedEvents(DatasetEventManager.java:128)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager.access$300(DatasetEventManager.java:27)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager$1.run(DatasetEventManager.java:199)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:694)
	at java.awt.EventQueue$3.run(EventQueue.java:692)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

[Don-vip]

Closed as duplicate of #8888.
Same problem see my answer in #10272