[MacPorts] #50287: qt5-qtwebengine @5.5.1: TypeError: argument of type 'NoneType' is not iterable (was: qt5-qtwebengine @5.5.1: build failed)

[MacPorts]

#50287: qt5-qtwebengine @5.5.1: TypeError: argument of type 'NoneType' is not
iterable
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  Reporter:  jianguohsiang82@…  |      Owner:  mcalhoun@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.3.4
Resolution:                     |   Keywords:
      Port:  qt5-qtwebengine    |
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Comment (by ryandesign@…):

 I see it fails with "`TypeError: argument of type 'NoneType' is not
 iterable`" when running something with "`python`". What is "`python`" on
 your system? You can run "`command -v python`" to find out where it is and
 "`python -V`" to find out what version it is. I suspect you have selected
 a version of python that is either too new or too old for Qt 5. The
 qt5-qtwebengine port should be enhanced to use a specific known-good
 version of MacPorts Python and not rely on the user having selected a
 suitable one.

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Ticket URL: <https://trac.macports.org/ticket/50287#comment:4>
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