Recv

In mpi-base.jl Recv has the following declaration:

function Recv{T<:MPIDatatype}(::Type{T}, src::Integer, tag::Integer, comm::Comm)

However:

MPI.Recv(Int64, Int(rank + txOffst), Int(i), comm)
and
MPI.Recv(typeof(rxVal), Int(rank + txOffst), Int(i), comm)

Both throw the error

ERROR: LoadError: MethodError: `Recv!` has no method matching Recv!(::Type{Ref{Int64}}, ::Int64, ::Int64, ::MPI.Comm)

It appears that Recv calls Recv! which then expects an array type, am I missing something or is this a bug? I notice that there are no tests or examples for sending single objects.