[postgis-tickets] [PostGIS] #3135: ST_SubDivide garden crasher on malformed polygon and linestring

[PostGIS]

#3135: ST_SubDivide garden crasher on malformed polygon and linestring
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  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  closed
  Priority:  blocker  |  Milestone:  PostGIS 2.2.0
 Component:  postgis  |    Version:  trunk
Resolution:  fixed    |   Keywords:
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Changes (by pramsey):

 * cc: strk (removed)
 * status:  reopened => closed
 * resolution:   => fixed


Comment:

 Your case is "fixed" at r13580, however it's not a perfect fix. It won't
 crash anymore, no matter what you do, even if you pack your object with
 enough repeated points to force another infinite recursion because I put
 in a recursion stopper. If you **do** try that you'll find the output is
 "wrong" as the portion of the object with the repeated points just
 disappears into the aether. The overhead in trying to catch that case and
 do the "right" thing (which is probably to remove the repeated points) is
 just too high. Another possibility would be to stuff the whole input
 object through the repeated points remover right at the start; not sure if
 we want to do that. My proximate fix, to avoid dropping your slightly
 repeating input was just to increase the minimum number of vertices we'd
 guarantee, since my mind boggled at what it meant to ask the function
 "only return polygons with no more than two vertices in them".

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/3135#comment:7>
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