Build Failure on ports-10.13_x86_64: carthage

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.13_x86_64
Full logs:    https://build.macports.org/builders/ports-10.13_x86_64-watcher/builds/19830
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    carthage
Subport list:
	- carthage
Variants:     None
Revision:     23302e21fe02a6ab5a46c075f6f883bc5870a1be
Build time:   0:01:15
Author:       Saagar Jha <saagar at saagarjha.com>

Log from failed builds:
	Building 'carthage' ... [ERROR]
	> maintainers: saagar at saagarjha.com.

Broken ports:
	- carthage

Responsible maintainers:
	- saagar at saagarjha.com

Links to individual build jobs:
- ports-10.13_x86_64-builder #69549
  https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/69549

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