Thread: signal 11: Segmentation fault ; query constraint list; pg16.3

when connect to database postgres this query is OK, but run on user database, got segmentation fault.

2024-05-20 17:16:54.942 WIB,,,134291,,6648420a.20c93,165,,2024-05-18 12:52:10 WIB,,0,LOG,00000,"server process (PID 487952) was terminated by signal 11: Segmentation fault","Failed process was running: select
    ct.conname as constraint_name,
    a.attname as column_name,
    fc.relname as foreign_table_name,
    fns.nspname as foreign_table_schema,
    fa.attname as foreign_column_name
from
    (SELECT ct.conname, ct.conrelid, ct.confrelid, ct.conkey, ct.contype, ct.confkey, generate_subscripts(ct.conkey, 1) AS s
       FROM pg_constraint ct
    ) AS ct
    inner join pg_class c on c.oid=ct.conrelid
    inner join pg_namespace ns on c.relnamespace=ns.oid
    inner join pg_attribute a on a.attrelid=ct.conrelid and a.attnum = ct.conkey[ct.s]
    left join pg_class fc on fc.oid=ct.confrelid
    left join pg_namespace fns on fc.relnamespace=fns.oid
    left join pg_attribute fa on fa.attrelid=ct.confrelid and fa.attnum = ct.confkey[ct.s]
where
    ct.contype='f'
    and c.relname='table1'
    and ns.nspname='schemauser'
order by
    fns.nspname, fc.relname, a.attnum
;",,,,,,,,"","postmaster",,0

2024-05-20 17:16:54.942 WIB,,,134291,,6648420a.20c93,166,,2024-05-18 12:52:10 WIB,,0,LOG,00000,"terminating any other active server processes",,,,,,,,,"","postmaster",,0
--

scenario was:

- a few months ago install + deployed user data pg 16.2.

- 2 days ago, updated to 16.3

now I can reproduce the issue, the segment fault comes from 

postgres[495645]: segfault at 0 ip 00007f318b17e1f4 sp 00007ffc7f1b15d8 error 4 in citus.so[7f318b0a4000+ee000] likely on CPU 93 (core 1, socket 1)

after dropping the citus extension, now it's OK.

Thanks for the reply.