[PostGIS] #5525: ERROR: permission denied for view pg_file_settings

[PostGIS]

#5525: ERROR:  permission denied for view pg_file_settings
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  Reporter:  robe    |      Owner:  strk
      Type:  defect  |     Status:  assigned
  Priority:  medium  |  Milestone:  PostGIS 3.3.5
 Component:  build   |    Version:  3.3.x
Resolution:          |   Keywords:  pgextwlist
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Comment (by robe):

 Okay I looked at this more, pg_catalog.pg_db_role_setting is readable by
 nonsuper users so that's fine, but if that returns nothing, then we run
 into the next loop.  So I'm going to put a superuser check around that to
 prevent anyone that it will error on from falling into that loop.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5525#comment:22>
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