windows goxdcr panic during UprCloseStream

Process crashed during bidirectional test.
http://qa.sc.couchbase.com/job/w012R2-p0-xxdcr-vset02-01-goxdcr-bixdcr-ssl/65/

Port server goxdcr on node 'babysitter_of_ns_1@127.0.0.1' exited with status 1. Restarting. Messages: github.com/couchbase/goxdcr/gen_server.(*GenServer).run(0xc084c99b00)
C:/Jenkins/workspace/sherlock-windows/couchbase/goproj/src/github.com/couchbase/goxdcr/gen_server/gen_server.go:78 +0x840
created by github.com/couchbase/goxdcr/gen_server.(*GenServer).Start_server
C:/Jenkins/workspace/sherlock-windows/couchbase/goproj/src/github.com/couchbase/goxdcr/gen_server/gen_server.go:68 +0x77
[goport] 2015/04/22 14:28:36 c:/Program Files/Couchbase/Server/bin/goxdcr.exe terminated: exit status 2

panic: runtime error: invalid memory address or nil pointer dereference [recovered]
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x8 pc=0x63f309]

goroutine 263263 [running]:
runtime.panic(0x8d4e40, 0xbfe6a2)
c:/go/src/pkg/runtime/panic.c:279 +0x11f
github.com/couchbase/go-couchbase.func·023()
C:/Jenkins/workspace/sherlock-windows/couchbase/godeps/src/github.com/couchbase/go-couchbase/upr.go:171 +0x109
runtime.panic(0x8d4e40, 0xbfe6a2)
c:/go/src/pkg/runtime/panic.c:248 +0x1d3
github.com/couchbase/go-couchbase.(*UprFeed).UprCloseStream(0x0, 0xc0566f0200, 0x0, 0x0)
C:/Jenkins/workspace/sherlock-windows/couchbase/godeps/src/github.com/couchbase/go-couchbase/upr.go:175 +0x92
github.com/couchbase/goxdcr/parts.(*DcpNozzle).closeUprStreams(0xc0884c1200, 0x0, 0x0)
C:/Jenkins/workspace/sherlock-windows/couchbase/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:214 +0x287
github.com/couchbase/goxdcr/parts.(*DcpNozzle).Stop(0xc0884c1200, 0x0, 0x0)
C:/Jenkins/workspace/sherlock-windows/couchbase/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:192 +0x1b2
github.com/couchbase/goxdcr/common.Part.Stop·fm(0x0, 0x0)
C:/Jenkins/workspace/sherlock-windows/couchbase/goproj/src/github.com/couchbase/goxdcr/pipeline/generic_pipeline.go:255 +0x51
github.com/couchbase/goxdcr/pipeline_utils.func·001(0xc0840bc700)
C:/Jenkins/workspace/sherlock-windows/couchbase/goproj/src/github.com/couchbase/goxdcr/pipeline_utils/pipeline_utils.go:23 +0x60
created by github.com/couchbase/goxdcr/pipeline_utils.ExecWithTimeout
C:/Jenkins/workspace/sherlock-windows/couchbase/goproj/src/github.com/couchbase/goxdcr/pipeline_utils/pipeline_utils.go:25 +0x106