geolocation.getCurrentPosition() fails with dart2js

[a14n]

With last stable Dart version (2.10.4) the following code throws an error when compile to js with dart2js:

import 'dart:html';

void main() async {
  print(await window.navigator.geolocation.getCurrentPosition());
}

The error in the js console:

js_helper.dart:1129 Uncaught TypeError: Instance of 'GeolocationPosition': type 'UnknownJavaScriptObject' is not a subtype of type 'Geoposition'
    at Object.wrapException (js_helper.dart:1129)
    at Object._failedAsCheck (rti.dart:1016)
    at Rti._generalNullableAsCheckImplementation [as _as] (rti.dart:1009)
    at Rti._installSpecializedAsCheck (rti.dart:933)
    at Geolocation_getCurrentPosition_closure.call$1 (html_dart2js.dart:16887)
    at invokeClosure (js_helper.dart:1825)
    at js_helper.dart:1857

EDIT : it works with webdev serve

[a14n]

/cc @sigmundch

[sigmundch]

@fishythefish @srujzs

[arxarinze]

you can write an interop library to get ahead with your coding or you can use mine Geolocation PolyFill till the good peeps at dart solve this