[MacPorts] #18719: port should keep debug output when an action ends in error

[MacPorts]

#18719: port should keep debug output when an action ends in error
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 Reporter:  blb@…             |       Owner:  macports-tickets@…                   
     Type:  enhancement       |      Status:  new                                  
 Priority:  Normal            |   Milestone:  MacPorts 1.8.0                       
Component:  base              |     Version:  1.7.0                                
 Keywords:  debug log         |        Port:                                       
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Comment(by blb@…):

 (updated port.tcl.diff to not have issues if a command is run which never
 generates a debug log)

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Ticket URL: <http://trac.macports.org/ticket/18719#comment:1>
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