[MacPorts] #66942: Cannot Upgrade OpenCV4

[MacPorts]

#66942: Cannot Upgrade OpenCV4
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  Reporter:  fmw42    |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:  Failed to extract opencv4
      Port:  opencv4  |
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Changes (by fmw42):

 * Attachment "macports_opencv4_error.txt" added.

 Error message and list of installed ports

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Ticket URL: <https://trac.macports.org/ticket/66942>
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