[PostGIS] #5751: Problem with ST_Intersection

[PostGIS]

#5751: Problem with ST_Intersection
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  Reporter:  ezimanyi  |      Owner:  pramsey
      Type:  defect    |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS 3.4.3
 Component:  postgis   |    Version:  3.4.x
Resolution:            |   Keywords:
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Comment (by mdavis):

 This is a design choice made in the JTS/GEOS intersection algorithm, about
 how to handle invalid degenerate lines.

 The overlay algorithm is designed to never provide invalid output. Rightly
 or wrongly, zero-length lines are considered to be invalid. But perhaps it
 would be better to treat them as valid (or mostly valid - i.e. only if
 they occur in the input.)

 I'm not sure how hard it would be to provide this semantic.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5751#comment:3>
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