[XDCR] crash detected in unidirectional test case

./testrunner -i INI_FILE.ini get-cbcollect-info=True,get-coredumps=True,get-logs=False,stop-on-failure=False,fail_on_errors=1,GROUP=CHAIN -t xdcr.uniXDCR.unidirectional.load_with_async_ops_with_warmup,items=100000,rdirection=unidirection,ctopology=chain,standard_buckets=1,update=C1,delete=C1,warm=C2,GROUP=CHAIN;P1

test case passed but core dump found - attaching logs