[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
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  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 dlamija):

 Bulid sucessfully on full release Catalina & XCode 11. No crash. For those
 whose failed maybe there is some leftover from beta version

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Ticket URL: <https://trac.macports.org/ticket/58882#comment:36>
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