[MacPorts] #21117: use_dmg yes fails to copy from some images sometimes

[MacPorts]

#21117: use_dmg yes fails to copy from some images sometimes
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  Reporter:  ryandesign@…  |      Owner:  ryandesign@…
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:  MacPorts Future
 Component:  base          |    Version:  1.8.0
Resolution:  fixed         |   Keywords:
      Port:                |
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Comment (by ryandesign@…):

 A new fix was committed in r101650 to handle the non-root case. I haven't
 verified it. But if it works, then can't we remove the `elevateToRoot`
 part of r101504?

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Ticket URL: <https://trac.macports.org/ticket/21117#comment:8>
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