[PostGIS] #5862: Postgis topology, silently craating topo edge crosses edge , mixed face labeling in ring

[PostGIS]

#5862: Postgis topology, silently craating topo edge crosses edge , mixed face
labeling in ring
--------------------------------+------------------------
  Reporter:  Lars Aksel Opsahl  |      Owner:  strk
      Type:  defect             |     Status:  new
  Priority:  high               |  Milestone:
 Component:  topology           |    Version:  master
Resolution:                     |   Keywords:  robustness
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Comment (by Lars Aksel Opsahl):

 Just as a comment here I had a input dataset which resulted in 33200 faces
 and that was split in 133 working content based grid cell and in 10 of
 those there was a topology error, some of the errors had an effect more
 than one cell so distinct errors was


 {{{
 '("face without edges",80171,)'
  '("face without edges",74918,)','("face has wrong mbr",72996,)'
  '("face without edges",78662,)','("face has wrong mbr",74635,)'
  '("face has wrong mbr",77591,)'
  '("face without edges",78662,)'
  '("face without edges",74918,)'
 }}}


 Then I did a new call with the exact same area and code but I change one
 parameter at this to merge sliver areas that collapses if I buffer in with
 one meter. This resulted in 33170 faces zero topology errors.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5862#comment:6>
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