| error: the start function cannot have arguments | 
 |  --> $DIR/start-function.rs:7:13 | 
 |   | | 
 | 7 | pub fn foo2(x: u32) {} | 
 |   |             ^^^^^^ | 
 |  | 
 | error: the start function cannot have generics | 
 |   --> $DIR/start-function.rs:10:12 | 
 |    | | 
 | 10 | pub fn foo3<T>() {} | 
 |    |            ^^^ | 
 |  | 
 | error[E0277]: the trait bound `std::result::Result<wasm_bindgen::JsValue, ()>: wasm_bindgen::__rt::Start` is not satisfied | 
 |   --> $DIR/start-function.rs:27:1 | 
 |    | | 
 | 27 | #[wasm_bindgen(start)] | 
 |    | ^^^^^^^^^^^^^^^^^^^^^^ the trait `wasm_bindgen::__rt::Start` is not implemented for `std::result::Result<wasm_bindgen::JsValue, ()>` | 
 |    | | 
 |    = help: the following implementations were found: | 
 |              <std::result::Result<(), E> as wasm_bindgen::__rt::Start> | 
 |    = note: required by `wasm_bindgen::__rt::Start::start` | 
 |  | 
 | error[E0277]: the trait bound `std::result::Result<wasm_bindgen::JsValue, wasm_bindgen::JsValue>: wasm_bindgen::__rt::Start` is not satisfied | 
 |   --> $DIR/start-function.rs:30:1 | 
 |    | | 
 | 30 | #[wasm_bindgen(start)] | 
 |    | ^^^^^^^^^^^^^^^^^^^^^^ the trait `wasm_bindgen::__rt::Start` is not implemented for `std::result::Result<wasm_bindgen::JsValue, wasm_bindgen::JsValue>` | 
 |    | | 
 |    = help: the following implementations were found: | 
 |              <std::result::Result<(), E> as wasm_bindgen::__rt::Start> | 
 |    = note: required by `wasm_bindgen::__rt::Start::start` |