[MacPorts] #49669: port upgrade outdated @ MacPorts 2.3.4 Error: Unable to open port: can't read "mpi.default": no such variable

[MacPorts]

#49669: port upgrade outdated @ MacPorts 2.3.4 Error: Unable to open port: can't
read "mpi.default": no such variable
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  Reporter:  rioyokota@…  |      Owner:  dstrubbe@…
      Type:  defect       |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.4
Resolution:  fixed        |   Keywords:  haspatch
      Port:               |
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Comment (by dstrubbe@…):

 Hi all, sorry about that. I built various ports using MPI in testing
 before committing this though, so I am confused why it worked for me
 without that part added in 'global' -- anyone have a thought on that?

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Ticket URL: <https://trac.macports.org/ticket/49669#comment:11>
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