[PostGIS] #5701: topology crashing under PG17

[PostGIS]

#5701: topology crashing under PG17
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  Reporter:  robe      |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  blocker   |  Milestone:  PostGIS 3.5.0
 Component:  topology  |    Version:  master
Resolution:            |   Keywords:
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Comment (by robe):

 As far as I can tell, the first failure for PG17 was after these commits

 https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=66c0185a3d14bbbf51d0fc9d267093ffec735231

 {{{
     reindexdb: Add the index-level REINDEX with multiple jobs (details)
     Allow planner to use Merge Append to efficiently implement UNION
 (details)
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5701#comment:1>
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