[MacPorts] #34619: prevent use of unknown subports

[MacPorts]

#34619: prevent use of unknown subports
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  Reporter:  ryandesign  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:  MacPorts 2.5.0
 Component:  base        |    Version:  2.1.1
Resolution:  fixed       |   Keywords:
      Port:              |
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Comment (by jmroot):

 In [changeset:"4853357b26ae030ccc9497836137fa5d77b7a97c/macports-base"
 4853357b26ae030ccc9497836137fa5d77b7a97c/macports-base]:
 {{{
 #!ConfigurableCommitTicketReference repository="macports-base"
 revision="4853357b26ae030ccc9497836137fa5d77b7a97c"
 Error when a port is opened with a nonexistent subport

 Closes: #28
 Closes: https://trac.macports.org/ticket/34619
 (cherry picked from commit 9c48520c7347a84af603ed35ed27a96a42d57838)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/34619#comment:10>
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