selfupdate error

[pof at uvic.ca]

The "sudo port -d selfupdate" on my machine is failing with a
"command execution failed" error.  I have attached a gzip'd terminal
output from the command.  I suspect this is almost certainly due
to an issue with my own setup since I have seen no other similar
problems posted in the archives, but any help in resolving the
issue would be appreciated since I have so far been unable to
resolve the bug.  I'm running Sierra 10.12.3, with Xcode 8.2.1.

Thanks, Paul
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