[MacPorts] #40042: port clean all fails at R with variants

[MacPorts]

#40042: port clean all fails at R with variants
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  Reporter:  c.herbig@…  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  base        |    Version:  2.2.0
Resolution:              |   Keywords:
      Port:              |
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Comment (by c.herbig@…):

 P.S. Although it seems to be the fault of R, I filed this under base,
 since it might be good to see if there is a way to make base more
 resilient to what is causing this.

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Ticket URL: <https://trac.macports.org/ticket/40042#comment:1>
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