[MacPorts] #54112: autopen stuck on guile-2.0, refuses rebuild with guile-2.2.2

[MacPorts]

#54112: autopen stuck on guile-2.0, refuses rebuild with guile-2.2.2
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  Reporter:  mouse07410  |      Owner:
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  autogen     |
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Comment (by kencu):

 PR in place; if it passes all the Travis builds I'll add it.

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Ticket URL: <https://trac.macports.org/ticket/54112#comment:13>
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