buildbot failure in ASF Buildbot on tomcat-trunk

The Buildbot has detected a new failure of tomcat-trunk on ASF Buildbot.
Full details are available at:
 http://ci.apache.org/builders/tomcat-trunk/builds/83

Buildbot URL: http://ci.apache.org/

Buildslave for this Build: bb-vm_ubuntu

Build Reason: 
Build Source Stamp: [branch tomcat/trunk] 907983
Blamelist: markt

BUILD FAILED: failed compile

sincerely,
 -The ASF Buildbot