PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> We are launching a ne service and decided to test the new 12rc1
> It happens that from time to time the postgresql crashes with segmentation
> fault.
We're unlikely to be able to do anything about this without more
information. A self-contained test case would be ideal, otherwise
maybe you could get a stack trace from the crash?
https://wiki.postgresql.org/wiki/Generating_a_stack_trace_of_a_PostgreSQL_backend
regards, tom lane