[system test] cbq-engine crashes on /couchbase/query/execution/sequence.go:77 +0x42a

Load the tpcc workload with no-execute for 100 warehouses

Start tpcc workload with no-load for 1 client, 1 warehouse
Seeing a number of cbq-engine crashes

Port server query on node 'babysitter_of_ns_1@127.0.0.1' exited with status 1. Restarting. Messages: github.com/couchbase/query/server/http.func·012()
/home/couchbase/jenkins/workspace/sherlock-unix/goproj/src/github.com/couchbase/query/server/http/service_request.go:225 +0xf7
created by github.com/couchbase/query/server/http.newHttpRequest
/home/couchbase/jenkins/workspace/sherlock-unix/goproj/src/github.com/couchbase/query/server/http/service_request.go:233 +0x1268
[goport] 2015/05/26 09:56:01 /opt/couchbase/bin/cbq-engine terminated: exit status 2

Port server query on node 'babysitter_of_ns_1@127.0.0.1' exited with status 1. Restarting. Messages: github.com/couchbase/query/execution.(*IndexScan).RunOnce(0xc21ed203f0, 0xc21e7d7140, 0x0, 0x0)
/home/couchbase/jenkins/workspace/sherlock-unix/goproj/src/github.com/couchbase/query/execution/scan_index.go:83 +0x66
created by github.com/couchbase/query/execution.func·003
/home/couchbase/jenkins/workspace/sherlock-unix/goproj/src/github.com/couchbase/query/execution/base.go:135 +0x221
[goport] 2015/05/26 09:56:06 /opt/couchbase/bin/cbq-engine terminated: exit status 2

logs

https://s3.amazonaws.com/cb-customers/query/1/collectinfo-2015-05-26T170518-ns_1%4010.6.2.164.zip
https://s3.amazonaws.com/cb-customers/query/1/collectinfo-2015-05-26T170518-ns_1%4010.6.2.168.zip
https://s3.amazonaws.com/cb-customers/query/1/collectinfo-2015-05-26T170518-ns_1%4010.6.2.194.zip
https://s3.amazonaws.com/cb-customers/query/1/collectinfo-2015-05-26T170518-ns_1%4010.6.2.195.zip