id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12972	NullPointerException when loading WMS imagery layer	mhohmann	team	"==== What steps will reproduce the problem?
1. Load some data (in my case, in Estonia).
2. Switch on an imagery layer (in my case, Estonia Ortho, which is WMS).

==== What is the expected result?
The imagery layer should be displayed.

==== What happens instead?
Nothing is displayed and JOSM issues a crash / bug message every few seconds.

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

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-06-14 22:25:40 +0200 (Tue, 14 Jun 2016)
Build-Date:2016-06-15 01:34:12
Revision:10377
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10377 en) Linux Ubuntu 16.04 LTS
Memory Usage: 291 MB / 910 MB (64 MB allocated, but free)
Java version: 1.8.0_91-b14, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Dataset consistency test: No problems found

Plugins:
- AddrInterpolation (32158)
- FixAddresses (32158)
- Mapillary (32158)
- OpeningHoursEditor (32158)
- PicLayer (32158)
- apache-commons (32158)
- apache-http (32158)
- buildings_tools (32158)
- download_along (32158)
- measurement (32158)
- reverter (32158)
- terracer (32158)
- utilsplugin2 (32158)
- walkingpapers (32158)

Tagging presets:
- https://josm.openstreetmap.de/josmfile?page=Presets/Light_sources&zip=1

Map paint styles:
- /data/Maps/Styles/standard.mapcss
- /data/Maps/Styles/tmc.mapcss
- http://github.com/bastik/mapcss-tools/raw/osm/mapnik2mapcss/osm-results/mapnik.zip
- http://josm.openstreetmap.de/josmfile?page=Styles/light_source&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&style&zip=1

Last errors/warnings:
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.mapillary.gui.MapillaryHistoryDialog$RedoAction@49220604
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.mapillary.gui.MapillaryFilterDialog$UpdateAction@53e469da
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.mapillary.gui.MapillaryFilterDialog$ResetAction@59572235
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.measurement.MeasurementDialog$1@346716fa
- E: org.openstreetmap.josm.tools.bugreport.ReportedException: java.lang.NullPointerException. Cause: java.lang.NullPointerException

OSM API: http://api.openstreetmap.org/api

=== REPORTED CRASH DATA ===
MapView#paintLayer:
 - layer: org.openstreetmap.josm.gui.layer.WMSLayer@6b0f32c
 - bounds: Bounds[58.3540984,26.7199537,58.355097,26.7223541]

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (18) of main
java.lang.NullPointerException
	at org.openstreetmap.josm.gui.layer.AbstractTileSourceLayer.getScaleFactor(AbstractTileSourceLayer.java:295)
	at org.openstreetmap.josm.gui.layer.AbstractTileSourceLayer.getBestZoom(AbstractTileSourceLayer.java:305)
	at org.openstreetmap.josm.gui.layer.AbstractTileSourceLayer.paint(AbstractTileSourceLayer.java:1449)
	at org.openstreetmap.josm.gui.MapView.paintLayer(MapView.java:754)
	at org.openstreetmap.josm.gui.MapView.paint(MapView.java:825)
	at javax.swing.JComponent.paintChildren(JComponent.java:889)
	at javax.swing.JComponent.paint(JComponent.java:1065)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5210)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:290)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5158)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4969)
	at javax.swing.RepaintManager$4.run(RepaintManager.java:831)
	at javax.swing.RepaintManager$4.run(RepaintManager.java:814)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789)
	at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738)
	at javax.swing.RepaintManager.access$1200(RepaintManager.java:64)
	at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
	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.awt.EventQueue.dispatchEvent(EventQueue.java:726)
	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	major		Core imagery	latest	duplicate	imagery, wms, NullPointerException