id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12576	Execption Joining overlapping areas (CTRL-J)	mdk	team	"* Load the attached data (JoinError.osm).
* Select the (self intersecting) forrest
* Press CTRL-J

Expected:
Join the two areas (as if both would be separated ways) or show an error message, that this is not possible. 


What happens instead:
RuntimeException in JoinAreasAction.findBoundaryPolygons()

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-02-26 17:12:48 +0100 (Fri, 26 Feb 2016)
Build-Date:2016-02-27 02:32:11
Revision:9884
Relative:URL: ^/trunk

Identification: JOSM/1.5 (9884 en) Linux Ubuntu 15.10
Memory Usage: 259 MB / 876 MB (40 MB allocated, but free)
Java version: 1.8.0_66-internal-b17, Oracle Corporation, OpenJDK Server VM
VM arguments: [-Djosm.restart=true, -Djosm.home=/home/michael/.josm-latest, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
- ColumbusCSV (31772)
- FastDraw (31895)
- HouseNumberTaggingTool (31772)
- Mapillary (32040)
- OpeningHoursEditor (31772)
- RoadSigns (31895)
- SimplifyArea (31895)
- apache-commons (31895)
- apache-http (31895)
- buildings_tools (31895)
- contourmerge (1014)
- imagery-xml-bounds (31772)
- imagery_offset_db (32046)
- pbf (31772)
- poly (31772)
- public_transport (31895)
- reltoolbox (31895)
- reverter (32005)
- terracer (31895)
- turnrestrictions (31895)
- utilsplugin2 (32018)

Last errors/warnings:
- W: Unable to remove primitives from TestError [tester=org.openstreetmap.josm.data.validation.tests.UnconnectedWays$UnconnectedHighways@48b88116, code=1301, message=Way end node near other highway]
- W: Unable to remove primitives from TestError [tester=org.openstreetmap.josm.data.validation.tests.UnconnectedWays$UnconnectedHighways@48b88116, code=1301, message=Way end node near other highway]
- E: java.lang.RuntimeException: Join areas internal error.
- E: java.lang.RuntimeException: Join areas internal error.
- E: java.lang.RuntimeException: Join areas internal error.

java.lang.RuntimeException: Join areas internal error.
	at org.openstreetmap.josm.actions.JoinAreasAction.findBoundaryPolygons(JoinAreasAction.java:1122)
	at org.openstreetmap.josm.actions.JoinAreasAction.joinAreas(JoinAreasAction.java:601)
	at org.openstreetmap.josm.actions.JoinAreasAction.join(JoinAreasAction.java:485)
	at org.openstreetmap.josm.actions.JoinAreasAction.actionPerformed(JoinAreasAction.java:415)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
	at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:307)
	at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:263)
	at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2974)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2966)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
	at java.awt.Component.processEvent(Component.java:6312)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4891)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)
	at java.awt.Component.dispatchEventImpl(Component.java:4762)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Window.dispatchEventImpl(Window.java:2750)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
}}}"	defect	closed	normal		Core	latest	duplicate