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[Mathieu Bastian <mathieu.bastian@xxxxxxxxx>]

** Changed in: gephi
    Milestone: 0.7alpha4 => None

** Changed in: gephi
       Status: New => Fix Released

** Changed in: gephi/0.7
       Status: New => Fix Released

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NullPointerException when deleting nodes from the graph
https://bugs.launchpad.net/bugs/607136
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Team, which is subscribed to 0.7.

Status in Gephi - Network exploration and manipulation: Fix Released
Status in Gephi 0.7 series: Fix Released

Bug description:
After importing a graph (codeminer.gexf), if you select all the nodes and try to delete them, the following Exception is thrown:

java.lang.NullPointerException
	at org.gephi.graph.dhns.utils.avl.AbstractEdgeTree.remove(AbstractEdgeTree.java:239)
	at org.gephi.graph.dhns.core.GraphStructure.removeFromDictionnary(GraphStructure.java:165)
	at org.gephi.graph.dhns.core.StructureModifier$Business.deleteNode(StructureModifier.java:384)
	at org.gephi.graph.dhns.core.StructureModifier$Business.access$400(StructureModifier.java:277)
	at org.gephi.graph.dhns.core.StructureModifier.deleteNode(StructureModifier.java:103)
	at org.gephi.graph.dhns.graph.HierarchicalGraphImpl.removeNode(HierarchicalGraphImpl.java:202)
	at org.gephi.visualization.bridge.DHNSEventBridge.delete(DHNSEventBridge.java:380)
	at org.gephi.visualization.apiimpl.GraphContextMenu$7.actionPerformed(GraphContextMenu.java:116)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
	at javax.swing.AbstractButton$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:1223)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)
	at java.awt.Component.processMouseEvent(Component.java:6263)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6028)
	at java.awt.Container.processEvent(Container.java:2041)
	at java.awt.Component.dispatchEventImpl(Component.java:4630)
	at java.awt.Container.dispatchEventImpl(Container.java:2099)
	at java.awt.Component.dispatchEvent(Component.java:4460)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
	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.Component.dispatchEvent(Component.java:4460)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
	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)