[postgis-tickets] [PostGIS] #3280: Almost collinear edges prevent adding a copy of existing edge

[PostGIS]

#3280: Almost collinear edges prevent adding a copy of existing edge
----------------------+---------------------------
 Reporter:  strk      |      Owner:  strk
     Type:  defect    |     Status:  new
 Priority:  medium    |  Milestone:  PostGIS 2.1.9
Component:  topology  |    Version:  2.0.x
 Keywords:            |
----------------------+---------------------------
 Here is the input:
 {{{
 0102000020BB0B000002000000EC51B89E320F3841333333B3A9C8524114AE47611D0F384114AE47B17DC85241
 0102000020BB0B000003000000EC51B89E320F3841333333B3A9C852415649EE1F280F384164E065F493C85241A4703D8A230F38410AD7A37094C85241
 }}}

 Entering the 2-vertices line (first one) before the 3-vertices line in a
 topology results in a topology with 4 nodes and 2 edges.
 Adding the 2-vertices line again (copy of one of the 2 edges) fails with:

  ERROR:  Spatial exception - geometry intersects edge 2

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3280>
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