[PostGIS] #5835: The variants of ST_Union gives results that are inconsistent with each other

[PostGIS]

#5835: The variants of ST_Union gives results that are inconsistent with each
other
----------------------+---------------------------
  Reporter:  nbvfgh   |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  high     |  Milestone:  PostGIS 3.6.0
 Component:  postgis  |    Version:  3.5.x
Resolution:           |   Keywords:
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Comment (by nbvfgh):

 Replying to [comment:1 mdavis]:
 > Are you sure about the result of the two-input variant?  I get:
 > {{{
 > SELECT ST_AsText(ST_Union(
 >      'GEOMETRYCOLLECTION(POLYGON EMPTY, POINT EMPTY, LINESTRING(10 10,
 10 10))'::geometry,
 >      'POINT(1 1)'::geometry));
 >                                     st_astext
 >
 ----------------------------------------------------------------------------------
 >  GEOMETRYCOLLECTION(POLYGON EMPTY,POINT EMPTY,LINESTRING(10 10,10
 10),POINT(1 1))
 > }}}
 >
 > Still inconsistent, of course.

 Yes, I have double-checked it, and I am sure about the result of the two-
 input variant is
 {{{GEOMETRYCOLLECTION(POLYGON EMPTY,POINT EMPTY,LINESTRING(0 0,0
 0),POINT(1 1))}}}
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5835#comment:3>
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