postgres=# create incremental materialized view immv as values ((select 1));
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: 2020-09-28 17:08:21.533 JST [25227] LOG: server process (PID 25374) was terminated by signal 11: Segmentation fault