[MacPorts] #59450: Command "sudo port upgrade outdated fails"

[MacPorts]

#59450: Command "sudo port upgrade outdated fails"
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  Reporter:  gjmata  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:          |
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Comment (by EJFielding):

 I had a similar problem last week. I found out it was because my Xcode
 installation had been updated, and I needed to accept the Xcode license.
 The port selfupdate system does not provide an error message to tell you
 what happened.

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Ticket URL: <https://trac.macports.org/ticket/59450#comment:1>
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