Error on regression test using "make check" on postgresql 11.0 in GridDB (FDW)

Question

It cannot complete regression test using make check command. The issue occurs below:

SELECT * 
FROM department d, employee e 
WHERE d.department_id = e.emp_dept_id 
LIMIT 10;                                                                   

server closed the connection unexpectedly
This probably means the server terminated abnormally before or while processing the request.
connection to server was lost

This SQL query causes the error:

SELECT * 
FROM department d, employee e 
WHERE d.department_id = e.emp_dept_id 
LIMIT 10;

Following the log of the PostgreSQL server, I found out the error in griddb_fdw.c, line 857:

TRAP: FailedAssertion("!(fsstate->cursor == fsstate->num_tuples)", File: "griddb_fdw.c", Line: 857)
2018-12-26 15:45:56.052 +07 [5763] LOG:  server process (PID 5781) was terminated by signal 6: Aborted
2018-12-26 15:45:56.052 +07 [5763] DETAIL:  Failed process was running: 
SELECT * FROM department d, employee e WHERE d.department_id = e.emp_dept_id LIMIT 10;

The log of PostgreSQL server is attached: postmaster.log