[postgis-tickets] [PostGIS] #3569: ST_CollectionHomogenize sometimes returns reference to argument

[PostGIS]

#3569: ST_CollectionHomogenize sometimes returns reference to argument
----------------------+---------------------------
  Reporter:  dbaston  |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  high     |  Milestone:  PostGIS 2.2.3
 Component:  postgis  |    Version:  2.2.x
Resolution:           |   Keywords:
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Comment (by mwtoews):

 Here's a simplified version of the issue:
 {{{
 WITH cluster AS (
   SELECT ST_Polygonize(ST_MakeEnvelope(1, 2, 3, 4)) AS geom
 )
 SELECT ST_GeometryType(geom),
   ST_CollectionHomogenize(geom)::box2d,
   ST_CollectionHomogenize(geom::text)::box2d
 FROM cluster;

 -[ RECORD 1 ]-----------+----------------------
 st_geometrytype         | ST_GeometryCollection
 st_collectionhomogenize | BOX(0 0,3 4)
 st_collectionhomogenize | BOX(1 2,3 4)
 }}}
 The error is shown from the second field, where the X and Y coords are 0.
 A workaround is shown in the last example, where the geometry is
 recreated.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3569#comment:1>
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