[MacPorts] #55925: QGIS3 (2.99) Mac OS X 10.12.6 Vector Layer Properties dialog hangs QGIS on dialog exit

[MacPorts]

#55925: QGIS3 (2.99) Mac OS X 10.12.6 Vector Layer  Properties dialog hangs QGIS on
dialog exit
------------------------+-------------------
 Reporter:  fgfletcher  |      Owner:
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.4.2
 Keywords:              |       Port:  qgis3
------------------------+-------------------
 QGIS3 (2.99) MacPorts installation on Mac mini, OSX 10.12.6 (Sierra) was
 successful & app starts up.
 Created a line shape file, drew 1 single segment line and 1 4-segment
 line.
 Double clicking on layer brings up Layer Properties dialog.
 Exiting from this dialog, whether by Cancel or OK, causes QGIS to hang for
 ever.
 Project and shape file are attached.
 Notes: recent MacPorts install. Renamed ~/Library/"Application
 Support"/QGIS/QGIS3 folder to force clean startup - no change.  During
 hang the QGIS windows are still moveable, switching to other apps moves
 main window into background but the Layer Properties window stays in front
 of all other windows.

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Ticket URL: <https://trac.macports.org/ticket/55925>
MacPorts <https://www.macports.org/>
Ports system for macOS