Nothing -> (n : bn, gn, em)
(bnodes, gnodes, emap) = foldr step ([], [], []) nodes
rpcres <- executeRpcCall gnodes (RpcCallNodeInfo vgs hvs (Map.fromList emap))
- logRpcErrors rpcres
-- FIXME: The order of nodes in the result could be different from the input
return $ zip bnodes (repeat $ Left (RpcResultError "Broken configuration"))
++ rpcres