[MacPorts] #71126: MacOSX10.13.sdk fails to install on 10.15 Catalina

[MacPorts]

#71126: MacOSX10.13.sdk fails to install on 10.15 Catalina
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  Reporter:  rmottola         |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:  catalina
      Port:  MacOSX10.13.sdk  |
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Changes (by rmottola):

 * Attachment "main.log" added.

 install log

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Ticket URL: <https://trac.macports.org/ticket/71126>
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