Method onRejected

web/src/runtime.ts:1822–1825

(reason: any)

        callback.dispose();
      };
      const onRejected = (reason: any) => {
        callback(this.scalar(AsyncCallbackCode.kException, "int32"), reason.toString());
        callback.dispose();
      };
      promise.then(onFulfilled, onRejected);
    };
    this.registerFunc("__async." + name, asyncVariant, override);