id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
6522	NPE when adding wms layer	Cobra	Upliner	"What steps will reproduce the problem?
 1. add an wms layer

What is the expected result?
wms layer is added and displayed

What happens instead?
see below; layer isn't added while josm is still working

Please provide any additional information below. Attach a screenshot if
possible.
This happens only if you have used the layer with an older revision.
Deleting ~/.josm/wms-cache solves this problem.

{{{
Build-Date: 2011-06-29 10:59:35
Revision: 4183
Is-Local-Build: true

Identification: JOSM/1.5 (4183 SVN en)
Memory Usage: 124 MB / 910 MB (53 MB allocated, but free)
Java version: 1.6.0_24, Sun Microsystems Inc., Java HotSpot(TM) 64-Bit Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: ImproveWayAccuracy (26174)
Plugin: PicLayer (26174)
Plugin: alignways (26174)
Plugin: contourmerge (25626)
Plugin: measurement (26174)
Plugin: openstreetbugs (26174)
Plugin: openvisible (26174)
Plugin: proj4j (26174)
Plugin: reltoolbox (26174)
Plugin: reverter (26174)
Plugin: terracer (26174)
Plugin: undelete (26174)
Plugin: utilsplugin2 (26174)

java.lang.NullPointerException
	at org.openstreetmap.josm.data.imagery.WmsCache.removeNonReferencedFiles(WmsCache.java:238)
	at org.openstreetmap.josm.data.imagery.WmsCache.loadIndex(WmsCache.java:220)
	at org.openstreetmap.josm.gui.layer.WMSLayer.<init>(WMSLayer.java:135)
	at org.openstreetmap.josm.gui.layer.ImageryLayer.create(ImageryLayer.java:133)
	at org.openstreetmap.josm.actions.AddImageryLayerAction.actionPerformed(AddImageryLayerAction.java:27)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:850)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
	at java.awt.Component.processMouseEvent(Component.java:6289)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6054)
	at java.awt.Container.processEvent(Container.java:2041)
	at java.awt.Component.dispatchEventImpl(Component.java:4652)
	at java.awt.Container.dispatchEventImpl(Container.java:2099)
	at java.awt.Component.dispatchEvent(Component.java:4482)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
	at java.awt.Container.dispatchEventImpl(Container.java:2085)
	at java.awt.Window.dispatchEventImpl(Window.java:2478)
	at java.awt.Component.dispatchEvent(Component.java:4482)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)
	at java.awt.EventQueue.access$000(EventQueue.java:85)
	at java.awt.EventQueue$1.run(EventQueue.java:603)
	at java.awt.EventQueue$1.run(EventQueue.java:601)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
	at java.awt.EventQueue$2.run(EventQueue.java:617)
	at java.awt.EventQueue$2.run(EventQueue.java:615)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122
}}}
"	defect	closed	normal		Core imagery	latest	fixed	template_report add wms layer imagery