{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"//"}]}
                    // - `#[foo = include_str!("nonexistent-file.rs")]`:
                    // - `#[foo = 1+1]`: results in `ast::ExprKind::Binary`.
                    //   results in `ast::ExprKind::Err`. In that case we delay