Possibly I have just added "ulimit -c unlimited" in the script, we should see the effect on next round.
for def5b065 it ended on on the contrib ltree test: 2021-05-12 20:12:52.528 CEST [3042602:410] pg_regress/ltree LOG: disconnection: session time: 0:00:13.426 user=buildfarm database=contrib_regression_ltree host=[local] /home/fabien/pg/build-farm-12/buildroot/HEAD/pgsql.build/contrib/ltree/results/ltree.out 2021-05-12 20:12:52.523330311 +0200 @@ -7931,11 +7931,8 @@ (1 row) SELECT count(*) FROM _ltreetest WHERE t ~ '1.1.1.*' ; - count -------- - 19 -(1 row) - +ERROR: stack depth limit exceeded +HINT: Increase the configuration parameter "max_stack_depth" (currently 2048kB), after ensuring the platform's stack depth limit is adequate. SELECT count(*) FROM _ltreetest WHERE t ~ '*.1' ; count ------- Not a core dump, though. -- Fabien.