[postgis-tickets] [PostGIS] #3720: geobuf regress error on debbie and winnie

[PostGIS]

#3720: geobuf regress error on debbie and winnie
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  Reporter:  robe     |      Owner:  Björn Harrtell
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.4.0
 Component:  postgis  |    Version:  2.3.x
Resolution:           |   Keywords:
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Comment (by strk):

 lwgeom_from_gserialized keeps references to the memory allocated
 by PG_DETOAST_DATUM, which *might* or might *not* allocate new
 memory depending on the size of the geometry (thus multi-ring vs.
 single-ring might make a difference). If you want to be sure
 to get a copy (assuming you switched the context before calling
 the macro) you can use PG_DETOAST_DATUM_COPY instead.

 That said, I dunno if the whole context switching is done correctly
 as I see the transition function switching to the aggregate context
 and never switching back.
 See for comparison pgis_geometry_accum_transfn

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3720#comment:28>
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