Build Failure on ports-10.12_x86_64: grass7

[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/29313
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    grass7
Subport list:
	- grass7
Variants:     None
Revision:     df2b27948668172979cbab088a4a3ff308dd5de0
Build time:   0:42:21
Author:       Veence <vince at macports.org>

Log from failed builds:
	Building 'grass7' ... [ERROR]
	> maintainers: .

Broken ports:
	- grass7

Links to individual build jobs:
- ports-10.12_x86_64-builder #109078
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/109078

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