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/15498
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    znc
Subport list:
	- znc
Variants:     None
Revision:     5d0b779a729cc6765c0489ba9385e33a7a7afee0
Build time:   0:06:43
Author:       Zero King <l2dy at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.12_x86_64-builder #63574
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/63574

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