[MacPorts] #60497: python38 +optimizations compiled with `port select --set llvm mp-llvm-10` fails

[MacPorts]

#60497: python38 +optimizations compiled with `port select --set llvm mp-llvm-10`
fails
-----------------------+--------------------
  Reporter:  blair     |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  python38  |
-----------------------+--------------------

Comment (by kencu):

 all I can come up with is some kind of bug in llvm-profdata that has come
 up since llvm-9.0 was released. There are lots of changes in the file
 (it's just one file) but I can't spot the error, if there is one.

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Ticket URL: <https://trac.macports.org/ticket/60497#comment:3>
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