[MacPorts] #43944: postgresql91-server @9.1.13_0 changes groups of all users

[MacPorts]

#43944: postgresql91-server @9.1.13_0 changes groups of all users
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  Reporter:  dcabrilo@…           |      Owner:  macports-tickets@…
      Type:  defect               |     Status:  new
  Priority:  Normal               |  Milestone:
 Component:  ports                |    Version:  2.3.0
Resolution:                       |   Keywords:  postgres group
      Port:  postgresql91-server  |
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Comment (by dcabrilo@…):

 Thanks for the reply.

 I didn't move the disk, no. I installed postgresql91-server, then noticed
 the file group problem (without restarting or logging out). I went into
 panic mode and recovered from Time Machine before this installation and
 everything was fine. It's worth mentioning that I installed postgresql
 server months or years before and uninstalled without any problems.

 After I recovered from Time Machine, macports were not usable (some
 missing libraries), so I reinstalled them all. I tried to install
 postgresql91-server again, and the same group thing happened. I started
 manually chgrp-ing some directories, and when I uninstalled
 postgresql91-server everything was back to normal.

 Any idea on how I could replicate this? How can I see what "MacPorts
 add_users procedure" is doing exactly, so I can try only those commands?
 This might as well be a bug with OS X.

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Ticket URL: <https://trac.macports.org/ticket/43944#comment:2>
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