[MacPorts] #69074: rust: Unable to install on 10.13

[MacPorts]

#69074: rust: Unable to install on 10.13
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  Reporter:  dyne2meter  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:
      Port:  rust        |
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Comment (by ryandesign):

 Attaching the main.log for rust should help answer the question of why it
 fails to build and might shed light on why you didn't get a binary
 archive.

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Ticket URL: <https://trac.macports.org/ticket/69074#comment:2>
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