[MacPorts] #56225: mpbb: sort-with-subports.tcl chokes on circular dependency, fails silently

[MacPorts]

#56225: mpbb: sort-with-subports.tcl chokes on circular dependency, fails silently
----------------------------+---------------------
  Reporter:  raimue         |      Owner:  admin@…
      Type:  defect         |     Status:  closed
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:  fixed          |   Keywords:
      Port:                 |
----------------------------+---------------------

Comment (by raimue):

 In [changeset:"b015bb55029bcf34c9db6393c294b37afa155af7/macports-
 infrastructure" b015bb55029bcf34c9db6393c294b37afa155af7/macports-
 infrastructure]:
 {{{
 #!ConfigurableCommitTicketReference repository="macports-infrastructure"
 revision="b015bb55029bcf34c9db6393c294b37afa155af7"
 buildbot: Halt build if list-subports failed

 See: https://trac.macports.org/ticket/56225
 }}}

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Ticket URL: <https://trac.macports.org/ticket/56225#comment:3>
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