this error on validation element check

[anonymous]

Repository Root: ​http://josm.openstreetmap.de/svn
Build-Date: 2013-04-04 01:34:37
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Date: 2013-04-03 22:34:42 +0200 (Wed, 03 Apr 2013)
Revision: 5824
Last Changed Rev: 5824
URL: ​http://josm.openstreetmap.de/svn/trunk
Last Changed Author: Don-vip

Identification: JOSM/1.5 (5824 it) Linux
Memory Usage: 265 MB / 931 MB (62 MB allocated, but free)
Java version: 1.8.0-ea, Oracle Corporation, Java HotSpot(TM) Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: AddrInterpolation (29210)
Plugin: FastDraw (29457)
Plugin: FixAddresses (29210)
Plugin: HouseNumberTaggingTool (29210)
Plugin: ImageWayPoint (29210)
Plugin: ImportImagePlugin (29210)
Plugin: OpeningHoursEditor (29210)
Plugin: PicLayer (29210)
Plugin: RoadSigns (29417)
Plugin: SimplifyArea (29210)
Plugin: buildings_tools (29210)
Plugin: continuosDownload (28565)
Plugin: contourmerge (1003)
Plugin: dataimport (29222)
Plugin: download_along (29210)
Plugin: editgpx (29210)
Plugin: ext_tools (29210)
Plugin: geotools (29319)
Plugin: graphview (29210)
Plugin: imageryadjust (29261)
Plugin: importvec (29210)
Plugin: irsrectify (29210)
Plugin: jts (29319)
Plugin: lakewalker (29210)
Plugin: log4j (29000)
Plugin: mirrored_download (29210)
Plugin: multipoly-convert (29210)
Plugin: namemanager (29210)
Plugin: opendata (29301)
Plugin: openstreetbugs (29373)
Plugin: osmarender (29210)
Plugin: pbf (29210)
Plugin: pdfimport (29210)
Plugin: photo_geotagging (29210)
Plugin: plastic_laf (26605)
Plugin: print (29210)
Plugin: proj4j (29332)
Plugin: public_transport (29222)
Plugin: reltoolbox (29459)
Plugin: reverter (29359)
Plugin: scripting (30200)
Plugin: tag2link (29461)
Plugin: tageditor (29210)
Plugin: tagging-preset-tester (29210)
Plugin: terracer (29210)
Plugin: utilsplugin2 (29392)
Plugin: walkingpapers (29210)
Plugin: wikipedia (29330)
Plugin: wms-turbo-challenge2 (29210)

java.lang.NullPointerException

at org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor$12.run(PleaseWaitProgressMonitor.java:314)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:720)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:681)
at java.awt.EventQueue$3.run(EventQueue.java:679)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:690)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:216)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:135)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:127)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219)
at java.awt.Dialog.show(Dialog.java:1077)
at java.awt.Component.show(Component.java:1656)
at java.awt.Component.setVisible(Component.java:1608)
at java.awt.Window.setVisible(Window.java:1014)
at java.awt.Dialog.setVisible(Dialog.java:1003)
at org.openstreetmap.josm.gui.ExtendedDialog.setVisible(ExtendedDialog.java:476)
at org.openstreetmap.josm.gui.ExtendedDialog.showDialog(ExtendedDialog.java:269)
at org.openstreetmap.josm.tools.BugReportExceptionHandler$1.run(BugReportExceptionHandler.java:96)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:720)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:681)
at java.awt.EventQueue$3.run(EventQueue.java:679)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:690)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:216)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:135)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:127)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219)
at java.awt.Dialog.show(Dialog.java:1077)
at java.awt.Component.show(Component.java:1656)
at java.awt.Component.setVisible(Component.java:1608)
at java.awt.Window.setVisible(Window.java:1014)
at java.awt.Dialog.setVisible(Dialog.java:1003)
at org.openstreetmap.josm.gui.ExtendedDialog.setVisible(ExtendedDialog.java:476)
at org.openstreetmap.josm.gui.ExtendedDialog.showDialog(ExtendedDialog.java:269)
at org.openstreetmap.josm.tools.BugReportExceptionHandler$1.run(BugReportExceptionHandler.java:96)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:720)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:681)
at java.awt.EventQueue$3.run(EventQueue.java:679)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:690)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:216)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:135)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:123)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:119)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:111)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)