[MacPorts] #67521: Sometimes R fails to update dependencies when a package is installed, which may break the build, if such an update is required

[MacPorts]

#67521: Sometimes R fails to update dependencies when a package is installed, which
may break the build, if such an update is required
---------------------------+----------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  R             |
---------------------------+----------------------

Comment (by ryandesign):

 Because there is a dependency cycle; MacPorts behavior is undefined in
 that situation.

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Ticket URL: <https://trac.macports.org/ticket/67521#comment:2>
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