[MacPorts] #68672: ola: build failure

[MacPorts]

#68672: ola: build failure
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  Reporter:  iceKcaj  |      Owner:  peternewman
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:
      Port:  ola      |
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Comment (by ryandesign):

 And on the buildbot, ola fails because its dependency py27-protobuf3 fails
 due to #67518. According to that ticket, ola is the only port using
 py27-protobuf3. Could ola use a py3* version of protobuf instead, which
 would not have this problem?

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Ticket URL: <https://trac.macports.org/ticket/68672#comment:3>
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