[postgis-tickets] [PostGIS] #4919: SQL reliably crashes Server

[PostGIS]

#4919: SQL reliably crashes Server
----------------------+---------------------------
  Reporter:  Robins   |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.1.2
 Component:  postgis  |    Version:  3.0.x
Resolution:           |   Keywords:
----------------------+---------------------------

Comment (by Robins):

 Looking at `slicelength=slicelength at entry=40`, it seems that PostGIS
 defaults to fetching 40 bytes from detoast_attr_slice() which is probably
 unnecessary in this case.


 {{{
         /*
         ** The most info we need is the 8 bytes of serialized header plus
 the 32 bytes
         ** of floats necessary to hold the 8 floats of the largest XYZM
 index
         ** bounding box, so 40 bytes.
         */
         gpart = (GSERIALIZED*)PG_DETOAST_DATUM_SLICE(gsdatum, 0, 40);
 }}}

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4919#comment:1>
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