Copying a list of linked objects in a predicate

Users
5

One more example:

  curl -H "Content-Type: application/json" -X POST localhost:8080/mutate?commitNow=true -d '
{
  "query": "{ v as var(func:type(Company) ) {p as projects {uid} n as name}}",
  "set": {
    "uid": "uid(v)",
    "new_projects": "val(p)",
    "new_name": "val(n)"
  }
}

new_name gets set correctly, new_projects - does not. Is this unsupported for preditates of type [uid] ?