[Bug swing/34620] New: JTree.removeDescendantSelectedPaths() null pointer exception

[ks91 at sfc dot wide dot ad dot jp]

I have tried starting wija, an XMPP messaging client, with libgcj7-1-awt on
Ubuntu 7.10.
How to reproduce:

1) Download wija-change1363.zip from http://www2.media-art-online.org/nightly/
2) Unzip the file, and remove from "plugins" directory the following two files:
  * org.media_art_online.circ.Circ.jar
  * org.media_art_online.circ.Circ.jar.sig
  as they would cause another problem on a MIDI device.
3) start wija by the command: java -jar wija.jar
4) Ignore all setting up, and log in using an existing Jabber ID.
  This would generate the following exception:

Exception in thread "Thread-48" java.lang.NullPointerException    at
javax.swing.JTree.removeDescendantSelectedPaths(JTree.java:3085)    at
javax.swing.JTree$TreeModelHandler.treeStructureChanged(JTree.java:1299)    at
javax.swing.tree.DefaultTreeModel.fireTreeStructureChanged(DefaultTreeModel.java:606)
   at
javax.swing.tree.DefaultTreeModel.nodeStructureChanged(DefaultTreeModel.java:455)
   at org.media_art_online.wija.WijaUI.updateRoster(WijaUI.java:1563)    at
org.media_art_online.wija.WijaUI.setPresence(WijaUI.java:777)    at
org.media_art_online.wija.WijaUI.showRoster(WijaUI.java:1236)    at
org.media_art_online.jabber.Jabber.run(Jabber.java:650)   

If you try logging in with a jabber.org ID, do not specify SSL (there is a
problem with the certificate).
If you use Gmail/Google Talk ID, specify gmail.com as the domain, and do
specify SSL (although this might cause another problem).


-- 
           Summary: JTree.removeDescendantSelectedPaths() null pointer
                    exception
           Product: classpath
           Version: unspecified
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: swing
        AssignedTo: roman at kennke dot org
        ReportedBy: ks91 at sfc dot wide dot ad dot jp
 GCC build triplet: libgcj 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-
                    16ubuntu2)


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34620