buildbot failure in on serf-x64-macosx-apr2.0-dev

[buildbot]

The Buildbot has detected a new failure on builder serf-x64-macosx-apr2.0-dev 
while building . Full details are available at:
    https://ci.apache.org/builders/serf-x64-macosx-apr2.0-dev/builds/480

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

Buildslave for this Build: svn-x64-macosx-dgvrs

Build Reason: The AnyBranchScheduler scheduler named 'on-serf-commit' triggered 
this build
Build Source Stamp: [branch serf/trunk] 1805462
Blamelist: astieger

BUILD FAILED: failed Build

Sincerely,
 -The Buildbot