[MacPorts] #52446: Buildbot failure emails go to too many recipients

[MacPorts]

#52446: Buildbot failure emails go to too many recipients
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  Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
      Type:  defect        |     Status:  closed
  Priority:  High          |  Milestone:
 Component:  contrib       |    Version:
Resolution:  fixed         |   Keywords:
      Port:                |
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Comment (by larryv@…):

 Replying to [comment:7 ryandesign@…]:
 > I don't understand how it works. `buildMessageDict` clears
 > `interested_users`, passes `interested_users` to
 > `portMessageFormatter`, which does not appear to use it in any way,
 > and then somehow by the time `useLookup` is called, it's been filled
 > with the right data?

 `portMessageFormatter` populates `interested_users` in line 750 or
 thereabouts. I don’t really understand why it happens in that function.

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Ticket URL: <https://trac.macports.org/ticket/52446#comment:8>
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