[MacPorts] #58258: harfbuzz @2.3.1: build fails on 10.6 buildbot

[MacPorts]

#58258: harfbuzz @2.3.1: build fails on 10.6 buildbot
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  Reporter:  dbevans   |      Owner:  ryandesign
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  harfbuzz  |
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Comment (by ryandesign):

 Could you report the problem to the developers?

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Ticket URL: <https://trac.macports.org/ticket/58258#comment:3>
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