Rebalancing fails when adding node to cluster with one node and empty bucket

This is for a clean setup.

1) Create one node with default bucket or other bucket
2) Create a second node and join the previous to form a cluster
3) Hit rebalance.

==> Fails.

Have been able to reproduce.

"Workaround" (well not really applicable to have to delete buckets)

1) Delete buckets
2) Re-create bucket

Attached the diagnostics file.

//Daniel