[MacPorts] #28602: gource @0.31 build error - ambiguous overload for 'operator!=' in 'mem_pointer != 0'

[MacPorts]

#28602: gource @0.31 build error - ambiguous overload for 'operator!=' in
'mem_pointer != 0'
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 Reporter:  martin.eisenhardt@…            |       Owner:  phw@…           
     Type:  defect                         |      Status:  new             
 Priority:  Normal                         |   Milestone:                  
Component:  ports                          |     Version:  1.9.2           
 Keywords:                                 |        Port:  gource          
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Comment(by ryandesign@…):

 It builds for me on Snow Leopard, but I see you're on Leopard. Could you
 clean and try again, and if it fails again, attach the complete main.log?
 The log you've shown is incomplete (contains lines that say it's skipping
 parts it did before).

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Ticket URL: <https://trac.macports.org/ticket/28602#comment:2>
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