buildbot exception in MacPorts on ports-10.6_x86_64_legacy-watcher

[buildbot at macports.org]

The Buildbot has detected a build exception on builder ports-10.6_x86_64_legacy-watcher while building macports/macports-ports. Full details are available at:
    https://build.macports.org/builders/ports-10.6_x86_64_legacy-watcher/builds/13106

Buildbot URL: https://build.macports.org/

Buildslave for this Build: ports-10.6_x86_64_legacy

Build Reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Build Source Stamp: [branch master] 30452ee2a244c58c9b66a1424d49116f0d0a2d60
Blamelist: Ryan Schmidt <git at ryandesign.com>

BUILD FAILED: exception trigger

Sincerely,
 -The Buildbot