Erroneous introspection schema resulting from one-to-many schema

[orpheuslummis]

We obtain a erroneous introspection schema when using a one-to-relation relationship.

Using the booksmany.gql example:

type Book {
    name: String
    rating: Float
    author: Author
}

type Author {
    name: String
    age: Int
    verified: Boolean
    published: [Book]
}

We obtain in GraphiQL:

Error: Introspection result missing inputFields: 
{"description":"","enumValues":null,"fields":null,"inputFields":null,"interfaces":null,"kind":"INPUT_OBJECT","name":"AuthorOrderArg","possibleTypes":null}