NPE when removing two ways from a relation via properties dialog

[anonymous]

I selected two ways that are members in the same relation, and tried to remove them from that relation using the delete button in the properties dialog (not the relation editor)

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.1
Created-By: 14.1-b02 (Sun Microsystems Inc.)
Main-class: JOSM
Main-Version: 2021 SVN
Main-Date: 2009-08-31T10:33:32.777000Z
Memory Usage: 85 MB / 910 MB (42 MB allocated, but free)
Java version: 1.6.0_15

Plugins: AgPifoJ
lakewalker
utilsplugin
validator
wmsplugin
Plugin AgPifoJ Version: 17363
Plugin lakewalker Version: 17375
Plugin utilsplugin Version: 17399
Plugin validator Version: 17352
Plugin wmsplugin Version: 17407


java.lang.IndexOutOfBoundsException: Index: 4, Size: 4
	at java.util.ArrayList.RangeCheck(ArrayList.java:547)
	at java.util.ArrayList.remove(ArrayList.java:387)
	at org.openstreetmap.josm.data.osm.Relation.removeMember(Relation.java:98)
	at org.openstreetmap.josm.gui.dialogs.PropertiesDialog$DeleteAction.deleteFromRelation(PropertiesDialog.java:849)
	at org.openstreetmap.josm.gui.dialogs.PropertiesDialog$DeleteAction.actionPerformed(PropertiesDialog.java:876)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
	at java.awt.Component.processMouseEvent(Component.java:6263)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6028)
	at java.awt.Container.processEvent(Container.java:2041)
	at java.awt.Component.dispatchEventImpl(Component.java:4630)
	at java.awt.Container.dispatchEventImpl(Container.java:2099)
	at java.awt.Component.dispatchEvent(Component.java:4460)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
	at java.awt.Container.dispatchEventImpl(Container.java:2085)
	at java.awt.Window.dispatchEventImpl(Window.java:2475)
	at java.awt.Component.dispatchEvent(Component.java:4460)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

[Gubaer]

(In [2027]) fixed #3372: NPE when removing two ways from a relation via properties dialog