IllegalStateException when attempting download in Changeset Management Dialog

[rickmastfan67]

Steps to reproduce:

1. Start a completely fresh session of JOSM.
2. Windows > Changeset Manager
3. Click the "Query" button.
4. Click the "Download my changesets only" box in the "Basic" section of the "Query changesets" window.
5. Hit the "Query" button in the "Query changesets" window.

What happens:
You get an "Unexpected Exception".

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2012-01-11 02:31:59
Last Changed Author: jttt
Revision: 4784
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2012-01-10 22:54:24 +0100 (Tue, 10 Jan 2012)
Last Changed Rev: 4784

Identification: JOSM/1.5 (4784 en)
Memory Usage: 154 MB / 2730 MB (88 MB allocated, but free)
Java version: 1.6.0_30, Sun Microsystems Inc., Java HotSpot(TM) 64-Bit Server VM
Operating system: Windows 7

Plugin: OpeningHoursEditor (27355)
Plugin: buildings_tools (27355)
Plugin: imageryadjust (27355)
Plugin: licensechange (27400)
Plugin: mapdust (27355)
Plugin: measurement (27289)
Plugin: openstreetbugs (27355)
Plugin: restart (27289)
Plugin: reverter (27393)
Plugin: turnlanes (27355)
Plugin: turnrestrictions (27355)
Plugin: undelete (27395)
Plugin: utilsplugin2 (27421)

java.lang.IllegalStateException: Cannot create changeset query for open changesets of anonymous user
	at org.openstreetmap.josm.gui.dialogs.changeset.query.BasicChangesetQueryPanel.buildChangesetQuery(BasicChangesetQueryPanel.java:236)
	at org.openstreetmap.josm.gui.dialogs.changeset.query.ChangesetQueryDialog.getChangesetQuery(ChangesetQueryDialog.java:126)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager$QueryAction.actionPerformed(ChangesetCacheManager.java:368)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

[Don-vip]

In [4864/josm]:

see #7258 - IllegalStateException when attempting download in Changeset Management Dialog (error message has to be translated after stabilization)

[Don-vip]

In [4903/josm]:

fix #7258 - IllegalStateException when attempting download in Changeset Management Dialog (message translation)