[MacPorts] #66031: selfupdate throws error changing directory permissions on Monterey and Big Sur

[MacPorts]

#66031: selfupdate throws error changing directory permissions on Monterey and Big
Sur
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  Reporter:  petermichor  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.8.0
Resolution:               |   Keywords:  catalina bigsur monterey
      Port:               |
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Comment (by mouse07410):

 Well, on one of my Monterey systems (iMac), self-update went through
 without an error. On several other ones, it errored - but re-running
 selfupdate remedied it for good.

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Ticket URL: <https://trac.macports.org/ticket/66031#comment:19>
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