Segmentation fault during rebalancing

live cluster : http://172.23.106.191:8091/index.html#sec=log

test run : http://qa.sc.couchbase.com/job/centos_x64--00_01--qe-sanity-P0/436/console

Test to repro:
./testrunner -i yourini.ini -t view.viewquerytests.ViewQueryTests.test_employee_dataset_startkey_endkey_queries_rebalance_in,num_nodes_to_add=1,skip_rebalance=true,docs-per-day=1

Output
Port server memcached on node 'babysitter_of_ns_1@127.0.0.1' exited with status 137. Restarting. Messages: Tue May 27 13:39:50.615453 PDT 3: (default) UPR (Producer) eq_uprq:replication:ns_1@172.23.106.191->ns_1@172.23.106.192:default - (vb 900) Stream closing, 0 items sent from disk, 0 items sent from memory, 0 was last seqno sent
Tue May 27 13:39:50.617167 PDT 3: (default) UPR (Producer) eq_uprq:replication:ns_1@172.23.106.191->ns_1@172.23.106.192:default - (vb 900) takeover stream created with start seqno 0 and end seqno 18446744073709551615
Tue May 27 13:39:50.621586 PDT 3: (default) UPR (Producer) eq_uprq:replication:ns_1@172.23.106.191->ns_1@172.23.106.192:default - (vb 900) Stream closing, 0 items sent from disk, 0 items sent from memory, 0 was last seqno sent
Tue May 27 13:39:50.697764 PDT 3: (default) UPR (Consumer) eq_uprq:replication:ns_1@172.23.106.192->ns_1@172.23.106.191:default - (vb 902) Attempting to add stream with start seqno 0, end seqno 18446744073709551615, vbucket uuid 46931227679300, snap start seqno 0, and snap end seqno 0
Tue May 27 13:39:50.942360 PDT 3: (default) UPR (Consumer) eq_uprq:replication:ns_1@172.23.106.192->ns_1@172.23.106.191:default - (vb 900) Attempting to add stream with start seqno 0, end seqno 18446744073709551615, vbucket uuid 10357963175886, snap start seqno 0, and snap end seqno 0

Attaching logs.