ack for restart after activating remote control throws exception

[groovehunter]

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2013-08-07 01:35:24
Last Changed Author: Don-vip
Revision: 6115
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2013-08-07 00:04:24 +0200 (Wed, 07 Aug 2013)
Last Changed Rev: 6115

Identification: JOSM/1.5 (6115 de) Linux Ubuntu 12.04.2 LTS
Memory Usage: 526 MB / 2615 MB (442 MB allocated, but free)
Java version: 1.6.0_27, Sun Microsystems Inc., OpenJDK 64-Bit Server VM
Java package: openjdk-6-jre:amd64-6b27-1.12.6-1ubuntu0.12.04.2

Plugin: kendzi3d (214)
Plugin: kendzi3d-jogl (21)
Plugin: log4j (29853)

java.lang.NullPointerException
	at javax.swing.SwingUtilities.getWindowAncestor(SwingUtilities.java:137)
	at javax.swing.SwingUtilities.windowForComponent(SwingUtilities.java:455)
	at javax.swing.ToolTipManager.showTipWindow(ToolTipManager.java:309)
	at javax.swing.ToolTipManager$insideTimerAction.actionPerformed(ToolTipManager.java:629)
	at javax.swing.Timer.fireActionPerformed(Timer.java:313)
	at javax.swing.Timer$DoPostEvent.run(Timer.java:244)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:673)
	at java.awt.EventQueue.access$300(EventQueue.java:96)
	at java.awt.EventQueue$2.run(EventQueue.java:634)
	at java.awt.EventQueue$2.run(EventQueue.java:632)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:108)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:643)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)

[Don-vip]

Closed as duplicate of #8921.
It's not JOSM's fault, you have to update to OpenJDK7.