buildbot failure in on cayenne-nightly

[buildbot]

The Buildbot has detected a new failure on builder cayenne-nightly while 
building . Full details are available at:
    https://ci.apache.org/builders/cayenne-nightly/builds/1818

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

Buildslave for this Build: asf947_ubuntu

Build Reason: The Nightly scheduler named 'cayenneNightly' triggered this build
Build Source Stamp: [branch cayenne/main/trunk/] HEAD
Blamelist: 

BUILD FAILED: failed compile

Sincerely,
 -The Buildbot