[MacPorts] #70176: Error: No such port: mpich-clang18

[MacPorts]

#70176: Error: No such port: mpich-clang18
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  Reporter:  Schamschula      |      Owner:  eborisch
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.9.3
Resolution:                   |   Keywords:
      Port:  mpich sundials5  |
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Comment (by jmroot):

 Yes, and this will keep happening with every new clang version if the way
 these portgroups work stays as it is.

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Ticket URL: <https://trac.macports.org/ticket/70176#comment:1>
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