Build Failure on ports-10.12_x86_64

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.12_x86_64
Full logs:    https://build.macports.org/builders/ports-10.12_x86_64-watcher/builds/12053
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    rocksdb py-logbook py-distributed
Subport list:
	- py-distributed
	- py-logbook
	- py27-distributed
	- py27-logbook
	- py34-distributed
	- py34-logbook
	- py35-distributed
	- py35-logbook
	- py36-distributed
	- py36-logbook
	- rocksdb
Variants:     None
Revision:     c5a6829969c2c5d90f503a7e53eef4649bfb8e18
Build time:   0:30:10
Author:       Andrew Stromnov <stromnov at gmail.com>

Log from failed builds:

Links to individual build jobs:
- jobs-mirror #1480
  https://build.macports.org/builders/jobs-mirror/builds/1480

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