[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:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  base       |    Version:  2.10.5
 Keywords:             |       Port:
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 I see the same also on other Macs. It appears for example when I invoke
 `port outdated`.

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