[MacPorts] #60327: python38 fails to install under MacOS 10.15.4 or Catalina update 4 with MacPorts 2.6.2

[MacPorts]

#60327: python38 fails to install under MacOS 10.15.4 or Catalina update 4 with
MacPorts 2.6.2
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  Reporter:  oldbonez  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  python38  |
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Comment (by oldbonez):

 Hi Renee,

 I have {{{+universal set}}} from older macports installations and {{{
 universal_archs x86_64}}} set there.
 I didn't follow the entire Macports upgrade procedure on
 [https://trac.macports.org/wiki/Migration]. Just reinstalled ports and
 that was it.
 Shall I follow the procedure and try later?

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Ticket URL: <https://trac.macports.org/ticket/60327#comment:8>
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