On Fri, Dec 28, 2018 at 7:36 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> It would be worth updating to current (9.6.11) just on general principles.
> I'm too lazy to check the release notes to see whether we fixed any
> memory-stomp bugs since 9.6.8, but we've certainly fixed many bugs since
> then.
My guess is the same as it was back in April: tuplestore and/or one of
its callers gets confused about some aspect of resource management,
leading to a double-free.
Last time it was also a view that expands to a function call
(pg_buffercache, rather than pg_stat_statements).
I have a question for 梁博: Does pgpool happen to be involved here? That
was a factor in the bug report back in April. It's not impossible that
it's part of the problem here, too.
--
Peter Geoghegan