Build Failure on ports-10.13_x86_64

[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/17965
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    dovecot2-sieve
Subport list:
	- dovecot2-sieve
Variants:     None
Revision:     092b4bfcdf1d3327f7db7a49bf92664025a568a4
Build time:   0:17:40
Author:       Steven Thomas Smith <s.t.smith at ieee.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.13_x86_64-builder #62786
  https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/62786

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