panic_rebalance

2020-06-28T23:09:28.413Z [INF] SGCluster: Replication definitions changed - refreshing...
2020-06-28T23:09:28.413Z [INF] DCP: c:db-local-cfgSG cfg_sg: Get, key: sgrCluster, cas: 0
2020-06-28T23:09:28.413Z [INF] DCP: c:db-local-cfgSG cfg_sg: Get, key: sgrCluster, cas: 0
2020-06-28T23:09:28.414Z [INF] SGCluster: Stopping reassigned replication pushandpull-with-target-continuous
2020-06-28T23:09:28.416Z [ERR] Unexpected panic: runtime error: invalid memory address or nil pointer dereference - stopping process
goroutine 435 [running]:
runtime/debug.Stack(0xc000f75bf8, 0xdcee00, 0x18cb9a0)
	/home/couchbase/jenkins/workspace/sgw-unix-build/go1.13.4/src/runtime/debug/stack.go:24 +0x9d
github.com/couchbase/sync_gateway/base.FatalPanicHandler()
	/home/couchbase/jenkins/workspace/sgw-unix-build/2.8.0/enterprise/godeps/src/github.com/couchbase/sync_gateway/base/util.go:1293 +0x57
panic(0xdcee00, 0x18cb9a0)
	/home/couchbase/jenkins/workspace/sgw-unix-build/go1.13.4/src/runtime/panic.go:679 +0x1b2
github.com/couchbase/sync_gateway/db.(*ActiveReplicator).Close(0x0, 0xc000038088, 0x800000003)
	/home/couchbase/jenkins/workspace/sgw-unix-build/2.8.0/enterprise/godeps/src/github.com/couchbase/sync_gateway/db/active_replicator.go:65 +0x26
github.com/couchbase/sync_gateway/db.(*sgReplicateManager).RefreshReplicationCfg(0xc0001be3f0, 0x0, 0x0)
	/home/couchbase/jenkins/workspace/sgw-unix-build/2.8.0/enterprise/godeps/src/github.com/couchbase/sync_gateway/db/sg_replicate_cfg.go:403 +0x2d5
github.com/couchbase/sync_gateway/db.(*sgReplicateManager).SubscribeCfgChanges.func1(0xc000894ba0, 0xc0001be3f0)
	/home/couchbase/jenkins/workspace/sgw-unix-build/2.8.0/enterprise/godeps/src/github.com/couchbase/sync_gateway/db/sg_replicate_cfg.go:440 +0xff
created by github.com/couchbase/sync_gateway/db.(*sgReplicateManager).SubscribeCfgChanges
	/home/couchbase/jenkins/workspace/sgw-unix-build/2.8.0/enterprise/godeps/src/github.com/couchbase/sync_gateway/db/sg_replicate_cfg.go:435 +0x182
 -- base.FatalPanicHandler() at util.go:1293