[MacPorts] #57814: installing grep aborts with error code 71

[MacPorts]

#57814: installing grep aborts with error code 71
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  Reporter:  lemzwerg  |      Owner:  Schamschula
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  grep      |
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Comment (by lemzwerg):

 Worked, thanks.  It's quite interesting that this port fails with my old
 `binpath`, while hundreds of other port updates didn't have a single
 problem – I had added this directory for testing purposes two months ago,
 and all updates since then worked flawlessly.

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Ticket URL: <https://trac.macports.org/ticket/57814#comment:7>
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