Router returns INTERNAL_SERVER_ERROR with “empty query plan” when all planned fields are excluded via @include(false) and only __typename remains.

[DimaPF]

Describe the bug

Router returns INTERNAL_SERVER_ERROR with “empty query plan” when all planned fields are excluded via @include(false) and only __typename remains.

To Reproduce

Steps to reproduce the behavior:

1. Submit a request like (an operation where):

mutation UpdateRoom($input: RoomUpdateDto!) { updateRoom(input: $input) @include(if: false){ id name } __typename }

2. See error response:

{    "errors": [
        {
            "message": "value retrieval failed: empty query plan. This behavior is unexpected and we suggest opening an issue to apollographql/router with a reproduction.",
            "extensions": {
                "code": "INTERNAL_SERVER_ERROR"
            }
        }
    ]
}

Expected behavior

A valid data response without internal error, with __typename resolved. e.g. {"data": {"__typename": "Mutation"}}

Environment:

Router version: v1.59.1
Federation/supergraph

Additional context

I also reproduced it with the query GraphQL requests, not only the mutation. e.g.

query GetRoomsForUser {
  Room @include(if: false) {
    getRoomsForUser {
      edges {
        node { id }
      }
    }
  }
  __typename
}

If I change @include(if: false) to true, the request works as expected.
Tried Apollo-Expose-Query-Plan: true, but the environment doesn’t return extensions.queryPlan even for successful requests (which suggests the plugin might be disabled).
Can be related to #6154

[abernix]

What happens on a recent version of the Router? At least https://github.com/apollographql/router/releases/tag/v1.61.12, but ideally https://github.com/apollographql/router/releases/tag/v2.11.0?

[DimaPF]

@abernix same issue with https://github.com/apollographql/router/releases/tag/v2.11.0