netbeans version 6.9-0ubuntu2 failed to build on i386

netbeans version 6.9-0ubuntu2 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2405289

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2405289/+files/buildlog_ubuntu-natty-i386.netbeans_6.9-0ubuntu2_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 304131 lines into the build log:

 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.Target.execute(Target.java:390)
 at org.apache.tools.ant.Target.performTasks(Target.java:411)
 at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397)
 at org.apache.tools.ant.Project.executeTarget(Project.java:1366)
 at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
 at org.apache.tools.ant.Project.executeTargets(Project.java:1249)
 at org.apache.tools.ant.Main.runBuild(Main.java:801)
 at org.apache.tools.ant.Main.startAnt(Main.java:218)
 at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
 at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)

Total time: 3 minutes 54 seconds
make: *** [stamp-build-netbeans] Error 1
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110408-1605
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/netbeans-6.9