[MacPorts] #70548: unable to install libproxy. Likely due to a dependency cycle

[MacPorts]

#70548: unable to install libproxy. Likely due to a dependency cycle
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  Reporter:  michmill1970                        |      Owner:  (none)
      Type:  defect                              |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:  2.10.0
Resolution:                                      |   Keywords:
      Port:  vala graphviz gd2 libavif pandoc    |
  cabal ghc cabal-prebuilt wget alex happy       |
  hscolour libproxy hadrian                      |
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Comment (by nanigashi-uji):

 Try
 "port install vala -valadoc", before the install libproxy.

 https://trac.macports.org/ticket/70546

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Ticket URL: <https://trac.macports.org/ticket/70548#comment:1>
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