[MacPorts] #70620: py*-pyqt6: Failed to Parse After Sync

[MacPorts]

#70620: py*-pyqt6: Failed to Parse After Sync
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  Reporter:  RobK88    |      Owner:  reneeotten
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.10.1
Resolution:            |   Keywords:  highsierra
      Port:  py-pyqt6  |
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Comment (by jmroot):

 You should just need to add a check that the array element in question
 exists, i.e. `[info exists qt_info([option qt6.base])]`, and do something
 reasonable like returning an empty list otherwise.

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Ticket URL: <https://trac.macports.org/ticket/70620#comment:4>
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