[MacPorts] #45910: okular @0.6.4 makes broken screen when scrolling

[MacPorts]

#45910: okular @0.6.4 makes broken screen when scrolling
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  Reporter:  lightoml@…  |      Owner:  nicos@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.2
Resolution:              |   Keywords:
      Port:  okular      |
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Comment (by alessanderbotti@…):

 I'm also affected. I have a non-Retina display and the problem is also
 present on my external monitor. Moreover, the problem only occurs when
 using the trackpad, it does not occur when using an external mouse.

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Ticket URL: <https://trac.macports.org/ticket/45910#comment:10>
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