id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12450	NPE when illegal WMTS URL is added	stoecker	wiktorn	"When entering ""http://josm.openstreetmap.de"" as WMTS URL and later call menu entry it hangs a long time and finally says

{{{
java.lang.NullPointerException
        at org.openstreetmap.josm.data.imagery.WMTSTileSource.<init>(WMTSTileSource.java:235)
        at org.openstreetmap.josm.gui.layer.WMTSLayer.getTileSource(WMTSLayer.java:54)
        at org.openstreetmap.josm.gui.layer.AbstractTileSourceLayer.hookUpMapView(AbstractTileSourceLayer.java:593)
        at org.openstreetmap.josm.Main.addLayer(Main.java:768)
}}}


It should not hang or NPE, but give a meaningful error message. Also I'd appreciate when bad URL's are catched already in Preferences setup, not only when calling the added entry from menu.
"	defect	closed	normal	16.02	Core imagery	latest	fixed	wmts