[MacPorts] #71478: Port complains: 'Error: process_cmd failed: key "version" not known in dictionary'

[MacPorts]

#71478: Port complains: 'Error: process_cmd failed: key "version" not known in
dictionary'
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  Reporter:  ballapete  |      Owner:  mascguy
      Type:  defect     |     Status:  closed
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:  2.10.5
Resolution:  fixed      |   Keywords:
      Port:             |
------------------------+---------------------

Comment (by ballapete):

 After `selfupdate` a `list` succeeded without any complaint.

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Ticket URL: <https://trac.macports.org/ticket/71478#comment:8>
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