Flutter 2.5 and Firestore (what is native code?)

[jerryhamby]

Building a web based app using Firestore as the backend.
This use to work in Flutter 2.2.3, but Flutter 2.5 is causing a problem.
What the heck is native code???

Problem:
Closure: () => Map<String, dynamic> from: function () { [native code] }

Lands on utils, dart ???
/// Handles the [PromiseJsImpl] object.
Future handleThenable(PromiseJsImpl thenable) async {
return util.promiseToFuture(thenable);
}

My Plugins:
firebase_core: ^1.6.0
cloud_firestore: ^2.5.

My Search:
QuerySnapshot querySnapshot = await FirebaseFirestore.instance
.collection('users')
.where("userid", isEqualTo: theid)
.where('password', isEqualTo: thepass)
.where("status", isEqualTo: "admin")
.get();