[MacPorts] #59245: redis @5.0.6 build error on mac os 10.15 Catalina with Xcode 11.0

[MacPorts]

#59245: redis @5.0.6 build error on mac os 10.15 Catalina with Xcode 11.0
-------------------------+----------------------
  Reporter:  jonasjonas  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.6.1
Resolution:              |   Keywords:  catalina
      Port:  redis       |
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Comment (by jonasjonas):

 I had Xcode 11.1 installed.

 But today I selfupdated macports, synced the tree, and viola: redis can be
 build again.

 Thanks!

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Ticket URL: <https://trac.macports.org/ticket/59245#comment:6>
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