[MacPorts] #55498: pan crashes when built with gmime3

[MacPorts]

#55498: pan crashes when built with gmime3
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 Reporter:  johnrosshunt  |      Owner:
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.4.2
 Keywords:                |       Port:  pan2
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 pan 0.143 is not yet ready for gmime3.  I can download new headers and
 even save attachments, but just about anything else causes a segfault.

 The author cautions against building with gmime3 in the following post:
 [http://lists.nongnu.org/archive/html/pan-announce/2017-12/msg00002.html].

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Ticket URL: <https://trac.macports.org/ticket/55498>
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