Anonymous fragments directly inside named fragments aren't handled properly

[rmosolgo]

In this case, the fields aren't resolved and @defer doesn't set aside any work for later:

{
  things {
    ... ThingFields
  }
}

fragment ThingFields on Thing {
  ... @defer {
    name
  }
}

As a result, context[:deferrals] is nil and the fields are never resolved. I think it must be a bug in gather_selections.rb:

graphql-ruby/lib/graphql/execution/interpreter/runtime.rb

Line 139 in 52ec07b

def gather_selections(owner_object, owner_type, selections, selections_to_run = nil, selections_by_name = {})

For reference, this query does work fine:

{
  ...QueryFields
}

fragment QueryFields on Query {
  things {
    ... @defer {
      name
    }
  }
}