[MacPorts] #23922: archcheck portgroup explodes if "port" prints a generic error

[MacPorts]

#23922: archcheck portgroup explodes if "port" prints a generic error
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 Reporter:  ryandesign@…             |       Owner:  ryandesign@…           
     Type:  defect                   |      Status:  new                    
 Priority:  Normal                   |   Milestone:                         
Component:  ports                    |     Version:  1.8.2                  
 Keywords:                           |        Port:  archcheck              
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Comment(by jmr@…):

 ui_warn goes to stderr so you should be able to separate warnings from the
 actual output.

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Ticket URL: <http://trac.macports.org/ticket/23922#comment:1>
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