[MacPorts] #28049: pango 1.28.3 fails to build (libpng 1.4.5)

[MacPorts]

#28049: pango  1.28.3 fails to build (libpng 1.4.5)
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 Reporter:  alexander.zimmermann@…               |       Owner:  ryandesign@…           
     Type:  defect                               |      Status:  new                    
 Priority:  Normal                               |   Milestone:                         
Component:  ports                                |     Version:  1.9.2                  
 Keywords:                                       |        Port:  pango                  
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Comment(by alexander.zimmermann@…):

 But did cairo get a rev bump for the new libpng? I'm not a macports
 expert, but how can macports know that it should rebuild cairo?

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Ticket URL: <https://trac.macports.org/ticket/28049#comment:5>
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