Tomas Vondra <tomas.von...@2ndquadrant.com> writes: > On Fri, Oct 04, 2019 at 12:36:01AM -0400, Tom Lane wrote: >> What I think is happening is that c477f3e449 allowed this bit in >> AllocSetRealloc: >> context->mem_allocated += blksize - oldblksize; >> to be executed in situations where blksize < oldblksize, where before >> that was not possible. >> ... >> (I'm not quite sure why we're not seeing this failure on *all* the >> 32-bit machines; maybe there's some other factor involved?)
> Interesting failure mode (especially that it does *not* fail on some > 32-bit machines). Just to make things even more mysterious, prairiedog finally showed the Assert failure on its fourth run with c477f3e449 included: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=prairiedog&dt=2019-10-04%2012%3A35%3A41 It's also now apparent that lapwing and locust were failing only sometimes, as well. I totally don't understand why that failure would've been only partially reproducible. Maybe we should dig a bit harder, rather than just deciding that we fixed it. regards, tom lane
