[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
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  Reporter:  strk      |      Owner:  strk
      Type:  defect    |     Status:  assigned
  Priority:  blocker   |  Milestone:  PostGIS 2.2.0
 Component:  topology  |    Version:  2.0.x
Resolution:            |   Keywords:  robustness
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Changes (by strk):

 * status:  new => assigned
 * priority:  medium => blocker
 * milestone:  PostGIS 2.1.9 => PostGIS 2.2.0


Comment:

 so it looks like the segfault was due to something extraneous, but the 2.2
 patch still need more tweaks as it's missing an ORDER BY in comparison
 with the 2.1 implementation, which makes the algorithm (also the present
 one) not correct.

 I'll set target to 2.2.0 and blocker for now, so we don't release before
 fixing this, which is a regression (even if I don't have a test handy to
 show the regressing part).

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3280#comment:12>
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