[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  |
-----------------------+----------------------

Comment (by mf2k):

 I cannot reproduce this on the release versions of Catalina and Xcode
 11.1.

 {{{
 $ port -v installed python37
 The following ports are currently installed:
   python37 @3.7.4_1 (active) platform='darwin 19' archs='x86_64'
 date='2019-10-11T03:29:47-0600'
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58882#comment:20>
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