wasm-bindgen-macro 0.2.70

Definition of the `#[wasm_bindgen]` attribute, an internal dependency
Documentation 
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error[E0277]: the trait bound `std::result::Result<(), ()>: IntoJsResult` is not satisfied
  --> $DIR/async-errors.rs:30:1
   |
30 | #[wasm_bindgen]
   | ^^^^^^^^^^^^^^^ the trait `IntoJsResult` is not implemented for `std::result::Result<(), ()>`
   |
   = help: the following implementations were found:
             <std::result::Result<(), E> as IntoJsResult>
             <std::result::Result<T, E> as IntoJsResult>
   = note: required by `into_js_result`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `std::result::Result<(), BadType>: IntoJsResult` is not satisfied
  --> $DIR/async-errors.rs:32:1
   |
32 | #[wasm_bindgen]
   | ^^^^^^^^^^^^^^^ the trait `IntoJsResult` is not implemented for `std::result::Result<(), BadType>`
   |
   = help: the following implementations were found:
             <std::result::Result<(), E> as IntoJsResult>
             <std::result::Result<T, E> as IntoJsResult>
   = note: required by `into_js_result`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `wasm_bindgen::JsValue: From<BadType>` is not satisfied
  --> $DIR/async-errors.rs:34:1
   |
34 | #[wasm_bindgen]
   | ^^^^^^^^^^^^^^^ the trait `From<BadType>` is not implemented for `wasm_bindgen::JsValue`
   |
   = help: the following implementations were found:
             <wasm_bindgen::JsValue as From<&'a String>>
             <wasm_bindgen::JsValue as From<&'a T>>
             <wasm_bindgen::JsValue as From<&'a str>>
             <wasm_bindgen::JsValue as From<MyType>>
           and 62 others
   = note: required because of the requirements on the impl of `Into<wasm_bindgen::JsValue>` for `BadType`
   = note: required because of the requirements on the impl of `IntoJsResult` for `BadType`
   = note: required by `into_js_result`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `std::result::Result<BadType, wasm_bindgen::JsValue>: IntoJsResult` is not satisfied
  --> $DIR/async-errors.rs:36:1
   |
36 | #[wasm_bindgen]
   | ^^^^^^^^^^^^^^^ the trait `IntoJsResult` is not implemented for `std::result::Result<BadType, wasm_bindgen::JsValue>`
   |
   = help: the following implementations were found:
             <std::result::Result<(), E> as IntoJsResult>
             <std::result::Result<T, E> as IntoJsResult>
   = note: required by `into_js_result`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)