[PostGIS] #5793: Crash on Buffer of Empty array on PG17

[PostGIS]

#5793: Crash on Buffer of Empty array on PG17
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  Reporter:  pramsey  |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.5.1
 Component:  postgis  |    Version:  3.4.x
Resolution:           |   Keywords:  pg17
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Comment (by pramsey):

 Ladles and jelly spoons, I give you a pure PgSQL reproduction:
 {{{
 CREATE TABLE n (i integer);

 CREATE OR REPLACE FUNCTION add(integer)
     RETURNS integer
     AS 'SELECT 2 * $1 + 4 * $1'
     LANGUAGE 'sql' IMMUTABLE STRICT PARALLEL SAFE;

 SELECT add(array_length(array_agg(i)::numeric[],1)::integer) FROM n;
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5793#comment:8>
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