hpc/Q 2.0 does not find arguments

[Michael Schubert]

MWE:

fouter = function(arg1, arg2) {
    finner = function(a1) arg2
    finner(arg1)
}

# this works fine
mapply(fouter, arg1=letters[1:2], arg2=1:2)

# this throws an error saying "arg2 not found"
hpc = import('hpc')
hpc$Q(fouter,                                                              
      iter = list(arg1 = letters[1:2], arg2 = 1:2),                         
      memory=100, n_jobs=1)