[MacPorts] #49669: port upgrade outdated @ MacPorts 2.3.4 Error: Unable to open port: can't read "mpi.default": no such variable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#49669: port upgrade outdated @ MacPorts 2.3.4 Error: Unable to open port: can't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
--------------------------+--------------------------------
  Reporter:  rioyokota@…  |      Owner:  macports-tickets@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.4
Resolution:               |   Keywords:
      Port:               |
--------------------------+--------------------------------

Comment (by rioyokota@…):

 This is not for a specific port so there is no main.log file that I can
 attach. The error occurs when I do "sudo port upgrade outdated".

-- 
Ticket URL: <https://trac.macports.org/ticket/49669#comment:2>
MacPorts <https://www.macports.org/>
Ports system for OS X