Build Failure on ports-10.6_x86_64_legacy

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_x86_64_legacy
Full logs:    https://build.macports.org/builders/ports-10.6_x86_64_legacy-watcher/builds/23487
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    py-plumed plumed
Subport list:
	- plumed
	- plumed-devel
	- py27-plumed
	- py-plumed
	- py36-plumed
	- py37-plumed
Variants:     None
Revision:     aa36fa47a01eb2f7112308f4961018ec2aee0f89
Build time:   1:08:30
Author:       Giovanni Bussi <giovanni.bussi at gmail.com>

Log from failed builds:

Links to individual build jobs:
- ports-10.6_x86_64_legacy-builder #99146
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/99146
- ports-10.6_x86_64_legacy-builder #99147
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/99147
- ports-10.6_x86_64_legacy-builder #99148
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/99148
- ports-10.6_x86_64_legacy-builder #99149
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/99149
- ports-10.6_x86_64_legacy-builder #99150
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/99150
- ports-10.6_x86_64_legacy-builder #99151
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/99151

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