Build Failure on ports-10.7_x86_64_legacy

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.7_x86_64_legacy
Full logs:    https://build.macports.org/builders/ports-10.7_x86_64_legacy-watcher/builds/13283
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    py-corner
Subport list:
	- py36-corner
	- py-corner
	- py27-corner
Variants:     None
Revision:     a04f2b1e73baf18363ac279a3b82ad406c06ed96
Build time:   0:32:56
Author:       Duncan Macleod <duncan.macleod at ligo.org>

Log from failed builds:

Links to individual build jobs:
- jobs-mirror #2048
  https://build.macports.org/builders/jobs-mirror/builds/2048

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