NPE when pasting relation with incomplete node members to new layer

[bastiK]

Copying a relation with incomplete node members and pasting it to a new layer results in NPE.

Download; Ctrl-A; Ctrl-C; Ctrl-N; Ctrl-V -> Error

$ josm-latest 
Using /usr/lib/jvm/java-6-openjdk/bin/java to execute josm.
Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2012-03-17 02:32:15
Last Changed Author: simon04
Revision: 5092
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2012-03-16 22:36:45 +0100 (Fri, 16 Mar 2012)
Last Changed Rev: 5092

Info: Missing preference file '/home/te/.josm-latest/preferences.xml'. Creating a default preference file.
GET http://api.openstreetmap.org/api/capabilities... OK
GET http://api.openstreetmap.org/api/0.6/map?bbox=12.2196722,51.833125599999995,12.2450352,51.8426982
java.lang.NullPointerException
	at org.openstreetmap.josm.actions.PasteAction.pasteData(PasteAction.java:54)
	at org.openstreetmap.josm.actions.PasteAction.actionPerformed(PasteAction.java:44)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1660)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2851)
	at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:285)
	at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:247)
	at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2928)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2920)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
	at java.awt.Component.processEvent(Component.java:6045)
	at java.awt.Container.processEvent(Container.java:2045)
	at java.awt.Component.dispatchEventImpl(Component.java:4629)
	at java.awt.Container.dispatchEventImpl(Container.java:2103)
	at java.awt.Component.dispatchEvent(Component.java:4455)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1860)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:759)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1035)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:902)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:724)
	at java.awt.Component.dispatchEventImpl(Component.java:4499)
	at java.awt.Container.dispatchEventImpl(Container.java:2103)
	at java.awt.Window.dispatchEventImpl(Window.java:2517)
	at java.awt.Component.dispatchEvent(Component.java:4455)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:649)
	at java.awt.EventQueue.access$000(EventQueue.java:96)
	at java.awt.EventQueue$1.run(EventQueue.java:608)
	at java.awt.EventQueue$1.run(EventQueue.java:606)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:116)
	at java.awt.EventQueue$2.run(EventQueue.java:622)
	at java.awt.EventQueue$2.run(EventQueue.java:620)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:619)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)