id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13024	NPE at loading new WMS layer	slodki	team	"==== What steps will reproduce the problem?
1. Start JOSM
2. Load data from OSM for selected region in Poland
3. Add layer with geoportal ortophoto (WMS)

==== What is the expected result?

Background displayed (new layer added)

==== What happens instead?

No layer added, no background displayed.
GUI is flooded with exception pop-up (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: 2016-06-21 01:29:31 +0200 (Tue, 21 Jun 2016)
Build-Date:2016-06-21 01:33:29
Revision:10448
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10448 pl) Linux Slackware 14.2
Memory Usage: 426 MB / 898 MB (265 MB allocated, but free)
Java version: 1.8.0_91-b14, Oracle Corporation, OpenJDK Server VM
Dataset consistency test: No problems found

Plugins:
- OpeningHoursEditor (32158)

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

Map paint styles:
- https://github.com/bastik/mapcss-tools/raw/osm/mapnik2mapcss/osm-results/mapnik.zip
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_features&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lit&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/SimpleRoofTags&style&zip=1

Last errors/warnings:
- E: org.openstreetmap.josm.tools.bugreport.ReportedException: java.lang.NullPointerException. Przyczyna: java.lang.NullPointerException
- E: org.openstreetmap.josm.tools.bugreport.ReportedException: java.lang.NullPointerException. Przyczyna: java.lang.NullPointerException
- E: org.openstreetmap.josm.tools.bugreport.ReportedException: java.lang.NullPointerException. Przyczyna: java.lang.NullPointerException
- E: org.openstreetmap.josm.tools.bugreport.ReportedException: java.lang.NullPointerException. Przyczyna: java.lang.NullPointerException
- E: org.openstreetmap.josm.tools.bugreport.ReportedException: java.lang.NullPointerException. Przyczyna: java.lang.NullPointerException

=== REPORTED CRASH DATA ===
MapView#paintLayer:
 - layer: org.openstreetmap.josm.gui.layer.WMTSLayer@b7f85b
 - bounds: Bounds[50.0302649,19.9881966,50.0360328,19.9975279]

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (16) of main
java.lang.NullPointerException
	at org.openstreetmap.josm.gui.layer.WMTSLayer.getNativeScales(WMTSLayer.java:123)
	at org.openstreetmap.josm.gui.layer.WMTSLayer.getBestZoom(WMTSLayer.java:64)
	at org.openstreetmap.josm.gui.layer.AbstractTileSourceLayer.paint(AbstractTileSourceLayer.java:1449)
	at org.openstreetmap.josm.gui.MapView.paintLayer(MapView.java:775)
	at org.openstreetmap.josm.gui.MapView.paint(MapView.java:846)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5201)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:290)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5149)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4960)
	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	16.06	Core imagery	latest	fixed	NPE paintLayer getNativeScales getBestZoom WMS regression gsoc-core	wiktorn michael2402