warning: field is never read: `enum_path`
   --> $DIR/mod.rs:282:5
    |
282 |     pub enum_path: Option<TokenStream>,
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `#[warn(dead_code)]` on by default

warning: field is never read: `span`
   --> $DIR/mod.rs:296:5
    |
296 |     pub span: Span,
    |     ^^^^^^^^^^^^^^

warning: 2 warnings emitted

error: GraphQL interface must have at least one field
  --> $DIR/no_fields.rs:13:1
   |
13 | trait Character {}
   | ^^^^^^^^^^^^^^^^^^
   |
   = note: https://spec.graphql.org/June2018/#sec-Interfaces

error[E0412]: cannot find type `CharacterValue` in this scope
 --> $DIR/no_fields.rs:4:18
  |
4 | #[graphql(impl = CharacterValue)]
  |                  ^^^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `Character` in this scope
  --> $DIR/no_fields.rs:10:6
   |
10 | impl Character for ObjA {}
   |      ^^^^^^^^^ not found in this scope