Nullpointer after lakewalker

[stephankn]

Load a Landsat WMS. Then click with lakewalker on a lake. After lakewalker finished processing the NPE occurs. Happens every time.

Tried already the most current build from svn, no change with this. Build is based on 1044, no custom modifications.

Development version. Unknown revision.
java.lang.NullPointerException

at org.openstreetmap.josm.data.osm.visitor.SimplePaintVisitor.visitVirtual(SimplePaintVisitor.java:183)
at org.openstreetmap.josm.data.osm.visitor.MapPaintVisitor.visitAll(MapPaintVisitor.java:376)
at org.openstreetmap.josm.gui.layer.OsmDataLayer.paint(OsmDataLayer.java:173)
at org.openstreetmap.josm.gui.MapView.paint(MapView.java:283)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paintToOffscreen(Unknown Source)
at javax.swing.BufferStrategyPaintManager.paint(Unknown Source)
at javax.swing.RepaintManager.paint(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.seqPaintDirtyRegions(Unknown Source)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(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)

[stephankn]

patch fixing the nullpointer crash

[stephankn]

I tracked down the problem. If the image could not be read it returned a nullpointer. Lakewalker then inserted a new way containing one "null" node. That crashed josm.
Please submit attached patch.

[framm]

applied in lakewalker build 11920