[MacPorts] #61422: stack @2.5.1_0 build fails on Big Sur 11.1 Beta / Xcode 12.3 Beta

[MacPorts]

#61422: stack @2.5.1_0 build fails on Big Sur 11.1 Beta / Xcode 12.3 Beta
---------------------+-----------------------
  Reporter:  rswail  |      Owner:  essandess
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  bigsur
      Port:  stack   |
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Comment (by kencu):

 the fix referenced for ghc on BigSur was supposed to be in 8.10.3, and I
 notice we have that version of ghc now:

 https://github.com/macports/macports-
 ports/commit/1dd4dc03a88ddc0bf7cf6862692a52ceb524ee8d#diff-
 c7968cfa7dd4491c4f36b05d17922247eee14b20e9a0abd8e2a05879af62c173

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Ticket URL: <https://trac.macports.org/ticket/61422#comment:30>
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