[PostGIS] #6065: ValidateTopology fails to report invalid side-labeling

[PostGIS]

#6065: ValidateTopology fails to report invalid side-labeling
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 Reporter:  strk      |      Owner:  strk
     Type:  defect    |     Status:  new
 Priority:  medium    |  Milestone:  PostGIS 3.7.0
Component:  topology  |    Version:  master
 Keywords:            |
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 As reported in https://trac.osgeo.org/postgis/ticket/6064#comment:5 we
 have a case in which ValidateTopology fails to find bogus left_face and
 right_face labeling.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6065>
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