Обсуждение: pgsql: Add missed bms_copy() in perform_pruning_combine_step

Add missed bms_copy() in perform_pruning_combine_step

We were initializing a BMS to merely reference an existing one, which
would cause a double-free (and a crash) when the recursive algorithm
tried to intersect it with an empty one.  Fix it by creating a copy at
initialization time.

Reported-by: sqlsmith (by way of Andreas Seltenreich)
Author: Amit Langote
Discussion: https://postgr.es/m/87in923lyw.fsf@ansel.ydns.eu

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7ba6ee815dc90d4fab7226d343bf72aa28c9aa5c

Modified Files
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src/backend/partitioning/partprune.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)