LDAP authenticated session terminated by signal 11: Segmentation fault, PostgresSQL server terminates other active server processes

Hi all, I have encountered a problem related to LDAP authenticated session
with Postgres foreign data wrapper (postgres_fdw).

The server crashed with following errors and other active server processes
are terminated as well:
2019-02-20 14:53:30.496 SGT [PID=1353 application="" user_name= database=
host(port)=] LOG: server process (PID 26306) was terminated by signal 11:
Segmentation fault

2019-02-20 14:53:30.496 SGT [PID=1353 application="" user_name= database=
host(port)=] LOG: terminating any other active server processes

I can reproduce it in a test server with many other sessions connected:

1. login using non-LDAP-authenticated user, query local & foreign tables -
OK
2. login using LDAP-authenticated user, query local table - OK
3. login using LDAP-authenticated user, query foreign table - ERROR, server
crashes with signal 11: Segmentation fault error when I quit the psql
session

It seems like the problem only when the LDAP-authenticated session (which
queried foreign table) is terminated. In dmesg log, I can see following:

[16385512.182231] traps: postmaster[26306] general protection
ip:7f1e758b638c sp:7ffef7ed8858 error:0 in libc-2.17.so[7f1e75836000+1b6000]

Has anyone encountered similar issue?

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PostgreSQL version: 10.6
Platform: CentOS Linux
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Thank you.

Regards,
Mike Yeap