[postgis-tickets] [PostGIS] #3718: Invalid edge (no two distinct vertices exist)

[PostGIS]

#3718: Invalid edge (no two distinct vertices exist)
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  Reporter:  Andreas     |      Owner:  strk
  Wicht                  |
      Type:              |     Status:  new
  enhancement            |
  Priority:  high        |  Milestone:  PostGIS 2.3.3
 Component:  topology    |    Version:  2.3.x
Resolution:              |   Keywords:  topology, tolerance, 0-length, edge
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Comment (by Andreas Wicht):

 I had the same problem before the upgrade to postgis 2.3.2. (any advice on
 how to fix that issue is very appreciated ;) ) so the "need upgrade"
 messages should not be of relevance here.

 If the tolerance is lowered then small gaps are not being automatically
 snapped, which is exactly what I want.

 Would a 0-length edge (sorry, I thought all the time we are talking about
 line segments) be a (topological) problem? If yes, how about internally
 handling those errors? Is that even possible in a robust way?

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3718#comment:2>
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