[MacPorts] #49669: port upgrade outdated @ MacPorts 2.3.4 Error: Unable to open port: can't read "mpi.default": no such variable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#49669: port upgrade outdated @ MacPorts 2.3.4 Error: Unable to open port: can't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

Comment (by marko.budinich@…):

 Same error when migrating from Yosemite to El Capitan, using restore_ports
 script and also when trying to install boost port manually.

 can't read "mpi.default": no such variable
     while executing
 "if {${mpi.default} && ![mpi_variant_isset]} {
         default_variants-append +mpich
     }"
     (procedure "mpi.setup" line 87)
     invoked from within
 "mpi.setup          -gcc -dragonegg"
     (file "Portfile" line 90)
     invoked from within
 "source Portfile"
     invoked from within
 "$workername eval source Portfile"
     (procedure "mportopen" line 41)
     invoked from within
 "mportopen $portInfo(porturl) [list subport $portInfo(name)] $variantInfo"
 Unable to open port 'boost': can't read "mpi.default": no such variable
     while executing
 "dependenciesForPort $name $variants"
     (procedure "sort_ports" line 46)
     invoked from within
 "sort_ports $portList"
     invoked from within
 "set operationList [sort_ports $portList]"
     (file "./restore_ports.tcl" line 285)

-- 
Ticket URL: <https://trac.macports.org/ticket/49669#comment:7>
MacPorts <https://www.macports.org/>
Ports system for OS X