[MacPorts] #68710: py39-matplotlib: automated build failures on High Sierra, Mojave, Catalina

[MacPorts]

#68710: py39-matplotlib: automated build failures on High Sierra, Mojave, Catalina
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 Reporter:  thomasrussellmurphy  |      Owner:  (none)
     Type:  defect               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:
 Keywords:                       |       Port:  py39-matplotlib
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 Current port health shows these three platforms failing from the last
 update: https://ports.macports.org/port/py39-matplotlib/details/

 I'm also seeing a build failure locally on my 10.14.6 machine and can
 provide an additional log if desired.

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Ticket URL: <https://trac.macports.org/ticket/68710>
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