[MacPorts] #14061: "port contents" in a non-port directory causes 38 lines of error spew

[MacPorts]

#14061: "port contents" in a non-port directory causes 38 lines of error spew
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  Reporter:  ryandesign at macports.org  |       Owner:  jmpp at macports.org 
      Type:  defect                   |      Status:  new               
  Priority:  Normal                   |   Milestone:  MacPorts base bugs
 Component:  base                     |     Version:  1.7.0             
Resolution:                           |    Keywords:                    
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Changes (by ryandesign at macports.org):

  * owner:  macports-tickets at lists.macosforge.org => jmpp at macports.org

Comment:

 Is the attached patch an appropriate fix for this issue? I just copied
 some code from the `action_variants` procedure but it seems to work.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/14061#comment:1>
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