[postgis-tickets] [PostGIS] #4731: Garden crash ST_WrapX with new GEOS 3.9 Overlay logic

[PostGIS]

#4731: Garden crash ST_WrapX with new GEOS 3.9 Overlay logic
----------------------+--------------------------
  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  blocker  |  Milestone:  PostGIS GEOS
 Component:  postgis  |    Version:  master
Resolution:           |   Keywords:
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Comment (by pramsey):

 The core of this is a change in behavior. This result comes from
 overlayng:
 {{{
 50
 select st_astext(st_difference('LINESTRING(-11.1111111 70,70
 -11.1111111)'::geometry, 'LINESTRING (20.1 90, 20.1 -90)'::geometry));
                          st_astext
 -----------------------------------------------------------
  LINESTRING(-11.1111111 70,20.1 38.7888889,70 -11.1111111)
 (1 row)
 }}}
 The lwgeom_split_wrapx function expects a split (which under the covers is
 a difference of a line away from an input) to return a collection, which
 it then iterates on. Instead we hand it a unitary object... which it then
 goes and tries to split again. Hence the infinite recursion. We need
 probably the old behaviour back, so that a GEOS 3.9 install doesn't break
 older software.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4731#comment:9>
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