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/32856
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    OpenSceneGraph
Subport list:
	- OpenSceneGraph
Variants:     None
Revision:     7cb0ca9d3114a7cab1fc939a3065e91a7bf18617
Build time:   1:40:14
Author:       David B. Evans <devans at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.12_x86_64-builder #119805
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/119805

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