Error with Distributed since #323

[pablosanjose]

MWE:

using Distributed
addprocs(1)

@everywhere using Quantica

function get_g()
    g = LP.linear() |> hopping(1) |> attach(nothing, cells = 0) |> greenfunction
    return g[1]
end

g = get_g()
remotecall_fetch(g, 2, 0)

After #323 this errors with

ERROR: On worker 2:
TypeError: in typeassert, expected Symbol, got a value of type String

Note that before #323, g gets properly serialized and sent to remote workers