[postgis-tickets] [PostGIS] #5385: Postgres malloc assertion fail when using pg_cancel_backend with ST_AsMVT

PostGIS trac at osgeo.org
Wed Jun 21 12:29:46 PDT 2023


#5385: Postgres malloc assertion fail when using pg_cancel_backend with ST_AsMVT
-----------------------------+----------------------------
  Reporter:  gbartonowenstl  |      Owner:  pramsey
      Type:  defect          |     Status:  new
  Priority:  high            |  Milestone:  PostGIS 3.1.10
 Component:  postgis         |    Version:  3.3.x
Resolution:                  |   Keywords:  malloc, crash
-----------------------------+----------------------------
Comment (by robe):

 Replying to [comment:4 pramsey]:
 > Can you get it to go boom with just the
 > {{{
 > select st_buffer(centroids, 100) as geom from (values
 >             (ST_Point(-10680061.06558879665, 5050512.8441793214945,
 3857)),
 > }}}
 > subquery?
 >
 > In general,
 > * does just the buffer do it?
 > * if not, can you materialize the buffers into a table and call just the
 asmvtgeom and make it happen?
 > * if not, can you materialize the result of asmvtgeom and make it happen
 in asmvt?

 After 7000 tmux runs, probably about 10 minutes at this point, it has not
 crashed.
 I'll rerun the original to confirm it still crashes and then run it
 without the wagyu interrupt.
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5385#comment:6>
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