Shift+J on intersecting buildings fails

[Aurimas]

What steps will reproduce the problem?

1. Draw two intersecting rectangles.
2. Select them and Shift+J.

What is the expected result?

Rectangles are joined into one

What happens instead?

Bug report dialog pops up.

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

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2015-10-22 01:32:36
Last Changed Author: Don-vip
Revision: 8926
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2015-10-22 02:01:00 +0200 (Thu, 22 Oct 2015)
Last Changed Rev: 8926

Identification: JOSM/1.5 (8926 lt) Linux Ubuntu 15.10
Memory Usage: 1409 MB / 3475 MB (1168 MB allocated, but free)
Java version: 1.7.0_85, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u85-2.6.1-5
VM arguments: [-Djosm.restart=true, -Djosm.home=/home/erulez/.josm-latest, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
- Mapillary (31612)
- buildings_tools (31640)
- commons-imaging (31603)
- download_along (31603)
- imagery_offset_db (31646)
- measurement (31648)
- pbf (31603)
- rasterfilters (31603)
- turnlanes (31603)
- utilsplugin2 (31655)

Last errors/warnings:
- E: java.lang.RuntimeException: Way not circular
- E: java.lang.RuntimeException: Way not circular

java.lang.RuntimeException: Way not circular
	at org.openstreetmap.josm.actions.JoinAreasAction.markWayInsideSide(JoinAreasAction.java:778)
	at org.openstreetmap.josm.actions.JoinAreasAction.joinAreas(JoinAreasAction.java:580)
	at org.openstreetmap.josm.actions.JoinAreasAction.join(JoinAreasAction.java:474)
	at org.openstreetmap.josm.actions.JoinAreasAction.actionPerformed(JoinAreasAction.java:404)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1662)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2870)
	at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:307)
	at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:263)
	at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2962)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2954)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2833)
	at java.awt.Component.processEvent(Component.java:6293)
	at java.awt.Container.processEvent(Container.java:2229)
	at java.awt.Component.dispatchEventImpl(Component.java:4872)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Component.dispatchEvent(Component.java:4698)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1887)
	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:4742)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Window.dispatchEventImpl(Window.java:2719)
	at java.awt.Component.dispatchEvent(Component.java:4698)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747)
	at java.awt.EventQueue.access$300(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:706)
	at java.awt.EventQueue$3.run(EventQueue.java:704)
	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:720)
	at java.awt.EventQueue$4.run(EventQueue.java:718)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:717)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

[Don-vip]

Closed as duplicate of #11992.