Inserting node into way fails with error

[geowolfat@…]

What steps will reproduce the problem?

1. Load ​http://www.openstreetmap.org/?lat=48.298444&lon=15.776279&zoom=18
2. In residential highway 32785158, click-drag-insert a node in the middle of a segment

What is the expected result?
A new node gets inserted into the way at the x mark

What happens instead?
An error popup appears, a node will be created, but not inserted into the way

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

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2011-07-11 01:31:35
Last Changed Author: stoecker
Revision: 4223
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2011-07-10 22:46:41 +0200 (Sun, 10 Jul 2011)
Last Changed Rev: 4223

Identification: JOSM/1.5 (4223 de)
Memory Usage: 50 MB / 464 MB (13 MB allocated, but free)
Java version: 1.6.0_23, Sun Microsystems Inc., Java HotSpot(TM) Client VM
Operating system: Windows XP
Dataset consistency test: No problems found

Plugin: DirectUpload (26284)
Plugin: buildings_tools (26254)
Plugin: contourmerge (25626)
Plugin: editgpx (26284)
Plugin: measurement (26174)
Plugin: restart (26254)
Plugin: turnrestrictions (26299)
Plugin: utilsplugin2 (26320)

java.lang.AbstractMethodError
	at org.openstreetmap.josm.data.osm.event.PrimitivesAddedEvent.fire(PrimitivesAddedEvent.java:25)
	at org.openstreetmap.josm.data.osm.DataSet.fireEventToListeners(DataSet.java:942)
	at org.openstreetmap.josm.data.osm.DataSet.endUpdate(DataSet.java:921)
	at org.openstreetmap.josm.data.osm.DataSet.addPrimitive(DataSet.java:346)
	at org.openstreetmap.josm.command.AddCommand.executeCommand(AddCommand.java:50)
	at org.openstreetmap.josm.command.SequenceCommand.executeCommand(SequenceCommand.java:53)
	at org.openstreetmap.josm.data.UndoRedoHandler.addNoRedraw(UndoRedoHandler.java:36)
	at org.openstreetmap.josm.data.UndoRedoHandler.add(UndoRedoHandler.java:58)
	at org.openstreetmap.josm.actions.mapmode.SelectActi

[anonymous]

Closed as duplicate of #6596.