=?utf-8?q?PG_Bug_reporting_form?= <noreply(at)postgresql(dot)org> writes:
> I get :
> Program received signal SIGSEGV, Segmentation fault.
> int8_avg_combine (fcinfo=0x55bec3fdbc28) at
> ./build/../src/backend/utils/adt/numeric.c:4285
Judging by the location of the failure, what you're running into is
the int128 alignment problem fixed here:
https://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=619a8c47da7279c186bb57cc16b26ad011366b73
That will be in next month's update releases. In the mean time,
you could avoid the problem by disabling parallel queries.
Or build from REL_10_STABLE branch tip if you'd like to test
the fix.
regards, tom lane