[MacPorts] #34893: MacPorts base version 2.1.1 upgrade failure

[MacPorts]

#34893: MacPorts base version 2.1.1 upgrade failure
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  Reporter:  qingyun.oracle@…          |       Owner:  macports-tickets@…                   
      Type:  defect                    |      Status:  reopened                             
  Priority:  Normal                    |   Milestone:                                       
 Component:  ports                     |     Version:  2.1.1                                
Resolution:                            |    Keywords:                                       
      Port:                            |  
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Comment(by ryandesign@…):

 Please run "sudo port clean zlib" and then try again to "sudo port upgrade
 zlib".

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Ticket URL: <https://trac.macports.org/ticket/34893#comment:4>
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