This error joining overlapped building areas

[mcheck]

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2012-10-23 01:31:06
Last Changed Author: Don-vip
Revision: 5539
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2012-10-22 21:44:47 +0200 (Mon, 22 Oct 2012)
Last Changed Rev: 5539

Identification: JOSM/1.5 (5539 it)
Memory Usage: 430 MB / 931 MB (213 MB allocated, but free)
Java version: 1.6.0_26, Sun Microsystems Inc., Java HotSpot(TM) Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: AddrInterpolation (28807)
Plugin: FastDraw (28807)
Plugin: FixAddresses (28807)
Plugin: HouseNumberTaggingTool (28656)
Plugin: ImageWayPoint (28807)
Plugin: ImportImagePlugin (28807)
Plugin: OpeningHoursEditor (28656)
Plugin: PicLayer (28807)
Plugin: RoadSigns (28656)
Plugin: SimplifyArea (28807)
Plugin: buildings_tools (28807)
Plugin: continuosDownload (28565)
Plugin: contourmerge (1003)
Plugin: dataimport (28656)
Plugin: download_along (28807)
Plugin: editgpx (28807)
Plugin: ext_tools (28807)
Plugin: geotools (28655)
Plugin: graphview (28807)
Plugin: imageryadjust (28807)
Plugin: importvec (28807)
Plugin: irsrectify (28656)
Plugin: jts (28415)
Plugin: lakewalker (28807)
Plugin: mirrored_download (28807)
Plugin: multipoly-convert (28807)
Plugin: namemanager (28807)
Plugin: opendata (28807)
Plugin: openstreetbugs (28807)
Plugin: osmarender (28541)
Plugin: pbf (28656)
Plugin: pdfimport (28807)
Plugin: photo_geotagging (28807)
Plugin: plastic_laf (26605)
Plugin: print (28807)
Plugin: proj4j (28495)
Plugin: public_transport (28807)
Plugin: reltoolbox (28814)
Plugin: reverter (28820)
Plugin: scripting (30100)
Plugin: tageditor (28807)
Plugin: tagging-preset-tester (28566)
Plugin: terracer (28807)
Plugin: utilsplugin2 (28807)
Plugin: walkingpapers (28807)
Plugin: wms-turbo-challenge2 (28807)

java.awt.geom.IllegalPathStateException: missing initial moveto in path definition
	at java.awt.geom.Path2D$Double.needRoom(Path2D.java:1098)
	at java.awt.geom.Path2D.closePath(Path2D.java:1752)
	at org.openstreetmap.josm.tools.Geometry.getArea(Geometry.java:385)
	at org.openstreetmap.josm.tools.Geometry.polygonIntersection(Geometry.java:398)
	at org.openstreetmap.josm.data.validation.tests.OverlappingAreas$1.evaluate(OverlappingAreas.java:46)
	at org.openstreetmap.josm.data.validation.tests.OverlappingAreas$1.evaluate(OverlappingAreas.java:39)
	at org.openstreetmap.josm.tools.SubclassFilteredCollection$FilterIterator.findNext(SubclassFilteredCollection.java:36)
	at org.openstreetmap.josm.tools.SubclassFilteredCollection$FilterIterator.hasNext(SubclassFilteredCollection.java:44)
	at org.openstreetmap.josm.data.validation.TestError.visitHighlighted(TestError.java:262)
	at org.openstreetmap.josm.data.validation.TestError.paint(TestError.java:256)
	at org.openstreetmap.josm.gui.layer.ValidatorLayer.paint(ValidatorLayer.java:69)
	at org.openstreetmap.josm.gui.MapView.paintLayer(MapView.java:496)
	at org.openstreetmap.josm.gui.MapView.paint(MapView.java:580)
	at javax.swing.JComponent.paintChildren(JComponent.java:862)
	at javax.swing.JComponent.paint(JComponent.java:1038)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5124)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:278)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1224)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5072)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4882)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:785)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:713)
	at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:693)
	at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)
	at java.awt.EventQueue.access$000(EventQueue.java:84)
	at java.awt.EventQueue$1.run(EventQueue.java:602)
	at java.awt.EventQueue$1.run(EventQueue.java:600)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
	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)

[Don-vip]

Closed as duplicate of #8118.
Please, stop at creating the same ticket again and again.
Help us by providing the requested info in #8118.