Cannot decode when fragment contains a Node id

[chungwong]

Given an query

query HomeQuery {
  viewer {
    ...home_viewer
    id
  }
}

fragment home_viewer on Customer {
  id
}

and a response

{
  "data": {
    "viewer": {
      "id": "Q3VzdG9tZXI6MA=="
    }
  }
}

An error is is encountered.

response_body = Err(
    reqwest::Error {
        kind: Decode,
        source: Error("missing field `id`", line: 1, column: 43),
    },
)

If id is added along side with the the fragment, i.e.

    ...home_viewer
    id

somehow it cannot decode it. If id is removed then everything is okay.

I can reproduce the same problem in the github example by adding a fragment to the query

query RepoView($owner: String!, $name: String!) {
  repository(owner: $owner, name: $name) {
    ...home_viewer             
    id
    ...
  }
}

fragment home_viewer on Repository {
  id
}