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/22516
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    ceres-solver
Subport list:
	- ceres-solver
Variants:     None
Revision:     e5a1f207bdac90f1c3af15158950f0295ac51d9e
Build time:   0:11:09
Author:       Mark Moll <mmoll at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.12_x86_64-builder #88789
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/88789

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