[MacPorts] #63710: "Unable to open port: can't read "universal_possible": no such variable" after upgrading to 2.7.1

[MacPorts]

#63710: "Unable to open port: can't read "universal_possible": no such variable"
after upgrading to 2.7.1
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  Reporter:  singalen  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  base      |    Version:  2.7.1
Resolution:            |   Keywords:
      Port:            |
-----------------------+--------------------

Comment (by singalen):

 "port -d selfupdate" showed that I had a local source added to Macports.
 Attached a log.
 I will clean it up, sorry for confusion.

 Maybe it's a reason to give a diagnostic message in this case. Perhaps
 "Syncing local Git ports tree failed" should be printed on a higher
 logging level.

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Ticket URL: <https://trac.macports.org/ticket/63710#comment:5>
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