pipelinedb and pg_pathman clash

[darrkz]

pipelinedb and pg_pathman clash

pipelinedb version: complie from github master version code
pg_pathman version: 1.5
postgresql version: 11.3

stream table:

CREATE FOREIGN TABLE ad_click ( ad_id int8, iuin int8, ts timestamp ) SERVER pipelinedb; 

view:

CREATE VIEW ad_click_result WITH (action=materialize ) AS   
select ad_id, min(ts) first_view, max(ts) last_view, count(distinct iuin) as uv, count(*) as pv
from ad_click  
group by ad_id; 

psql commandline return:

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: Succeeded.

postgresql server log content:

Segmentation fault (PID 30695)
PostgreSQL version: 11.3
PipelineDB version: unknown at revision unknown
query: CREATE VIEW ad_click_result WITH (action=materialize ) AS   
select ad_id, min(ts) first_view, max(ts) last_view, count(distinct iuin) as uv, count(*) as pv
from ad_click  
group by ad_id;
backtrace:
/data/app/postgresql/lib/pipelinedb.so(debug_segfault+0x18)[0x7fe209542308]
/lib64/libc.so.6(+0x32570)[0x7fe20f9ab570]
/data/app/postgresql/lib/pipelinedb.so(+0xb81fd)[0x7fe2095611fd]
postgres: mysql dh [local] CREATE VIEW[0x690728]
postgres: mysql dh [local] CREATE VIEW[0x68f68b]
postgres: mysql dh [local] CREATE VIEW[0x692571]
postgres: mysql dh [local] CREATE VIEW[0x68f19f]
postgres: mysql dh [local] CREATE VIEW(create_plan+0x29)[0x6904f9]
postgres: mysql dh [local] CREATE VIEW(standard_planner+0x155)[0x69dcc5]
/data/app/postgresql/lib/pipelinedb.so(PipelinePlanner+0x18e)[0x7fe2095448de]
/data/app/postgresql/lib/pg_pathman.so(pathman_planner_hook+0xa1)[0x7fe20871c0a1]
postgres: mysql dh [local] CREATE VIEW(pg_plan_query+0x1a)[0x743caa]
/data/app/postgresql/lib/pipelinedb.so(+0x9bbec)[0x7fe209544bec]
/data/app/postgresql/lib/pipelinedb.so(GetContPlan+0x9a)[0x7fe209544d8a]
/data/app/postgresql/lib/pipelinedb.so(ExecCreateContViewStmt+0x1377)[0x7fe20953eb87]
/data/app/postgresql/lib/pipelinedb.so(PipelineProcessUtility+0xb05)[0x7fe20956ecc5]
/data/app/postgresql/lib/pg_pathman.so(pathman_process_utility_hook+0x83)[0x7fe20871b953]
/data/app/postgresql/lib/pg_stat_statements.so(+0x4a18)[0x7fe207d16a18]
/data/app/postgresql/lib/cstore_fdw.so(+0x7d90)[0x7fe2078ced90]
postgres: mysql dh [local] CREATE VIEW[0x746739]
postgres: mysql dh [local] CREATE VIEW[0x74760d]
postgres: mysql dh [local] CREATE VIEW(PortalRun+0x230)[0x747d70]
postgres: mysql dh [local] CREATE VIEW[0x74431d]
postgres: mysql dh [local] CREATE VIEW(PostgresMain+0x581)[0x7452f1]
postgres: mysql dh [local] CREATE VIEW(PostmasterMain+0x1ac3)[0x6d5c63]
postgres: mysql dh [local] CREATE VIEW(main+0x3f0)[0x64ad60]
/lib64/libc.so.6(__libc_start_main+0x100)[0x7fe20f997d20]
postgres: mysql dh [local] CREATE VIEW[0x4771d9]

after I drop the pg_pathman, every thing go ok...