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/16299
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    root6
Subport list:
	- root6
Variants:     None
Revision:     7cbc6ba8b04ba73986d7e5aed87b9ff007861322
Build time:   1:42:15
Author:       Chris Jones <jonesc at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.12_x86_64-builder #66070
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/66070

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