josm error merging overlapped areas

[mcheck]

Repository Root: ​http://josm.openstreetmap.de/svn
Build-Date: 2012-08-31 01:31:11
Last Changed Author: Don-vip
Revision: 5485
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: ​http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2012-08-31 00:21:56 +0200 (Fri, 31 Aug 2012)
Last Changed Rev: 5485

Identification: JOSM/1.5 (5485 it)
Memory Usage: 358 MB / 432 MB (79 MB allocated, but free)
Java version: 1.7.0_07, Oracle Corporation, Java HotSpot(TM) Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: AddrInterpolation (28541)
Plugin: FastDraw (28656)
Plugin: ImportImagePlugin (28656)
Plugin: PicLayer (28660)
Plugin: SimplifyArea (28656)
Plugin: buildings_tools (28656)
Plugin: continuosDownload (28565)
Plugin: dataimport (28656)
Plugin: download_along (28656)
Plugin: mirrored_download (28656)
Plugin: multipoly-convert (28656)
Plugin: namemanager (28541)
Plugin: print (28656)
Plugin: proj4j (28495)
Plugin: reverter (28656)
Plugin: tageditor (28656)
Plugin: tagging-preset-tester (28566)
Plugin: terracer (28656)
Plugin: undelete (28541)
Plugin: walkingpapers (28541)
Plugin: waydownloader (28492)
Plugin: wayselector (28541)

java.lang.RuntimeException: Join areas internal error.

at org.openstreetmap.josm.actions.JoinAreasAction.findBoundaryPolygons(JoinAreasAction.java:1015)
at org.openstreetmap.josm.actions.JoinAreasAction.joinAreas(JoinAreasAction.java:470)
at org.openstreetmap.josm.actions.JoinAreasAction.actionPerformed(JoinAreasAction.java:364)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1664)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2879)
at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:306)
at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:263)
at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2971)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2963)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2842)
at java.awt.Component.processEvent(Component.java:6282)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
at java.awt.Component.dispatchEventImpl(Component.java:4731)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)