[MacPorts] #58882: Python37 configure script segfaults in generate-posix-vars on macOS 10.15

[MacPorts]

#58882: Python37 configure script segfaults in generate-posix-vars on macOS 10.15
-----------------------+----------------------
  Reporter:  vdoublie  |      Owner:  jmroot
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  catalina
      Port:  python37  |
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Comment (by jmroot):

 @trainman75 the only significant difference between your log and mine that
 I can see up to the point where yours fails is:
 {{{
 -:info:configure checking for python3.7... python3.7
 +:info:configure checking for python3.7... no
 +:info:configure checking for python3... python3
 }}}
 How is configure finding python3.7 on your system? Also you have coreutils
 installed; clutching at straws but I don't suppose deactivating that port
 makes any difference?

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Ticket URL: <https://trac.macports.org/ticket/58882#comment:27>
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