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/28010
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    petsc
Subport list:
	- petsc
Variants:     None
Revision:     a79efa3ee1333851fb2c10d342e6c698cd9a4939
Build time:   0:33:38
Author:       tenomoto <takeshi at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.13_x86_64-builder #90154
  https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/90154

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