[system test] Create index gsi:panic: runtime error: invalid memory address or nil pointer dereference

1. Load the Buckets with the above data.
2. Wait for Primary index builds to be complete. Note: No active load now on the system.
3. Create index city on default(city) using gsi
cbq> select * from system:indexes where state="pending";
{
"requestID": "c3bde8ce-6e78-44b2-b186-907e30004519",
"signature":

{ "*": "*" }

,
"results": [
{
"indexes":

{ "datastore_id": "http://127.0.0.1:8091", "id": "7b70783f93346a3a", "index_key": [ "`city`" ], "keyspace_id": "default", "name": "city", "namespace_id": "default", "state": "pending", "using": "gsi" }

}
],
"status": "success",
"metrics":

{ "elapsedTime": "4.760238562s", "executionTime": "4.760086915s", "resultCount": 1, "resultSize": 412 }

}

The above index creation appears to be in Pending state for over 10 minutes.

Also the logs show a number of panics in the projector.
2015-04-08T08:28:28.026Z-07:00 [Info] VBRT<-0<-default<-127.0.0.1:8091 #MAINT_STREAM_TOPIC_4e:8a:b4:ff:77:5b:d:2d ##2 StreamEnd
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x40 pc=0x4ab640]

Attaching detailed stack and logs.