NormalizedCollection constructor error

I am getting the following error:

Error Error: Each argument to the NormalizedCollection constructor must be a valid Firebase reference or an Array containing a Firebase ref as the first argument i@http://192.168.0.100:8100/lib/firebase-util.min.js:9:6773 n@http://192.168.0.100:8100/lib/firebase-util.min.js:9:6478 http://192.168.0.100:8100/js/controllers.js:558:54 invoke@http://192.168.0.100:8100/lib/ionic/js/ionic.bundle.js:17762:22

Here is my data structure:

{
"login": {
"user1": "kato"
},

"profile": {
"user1": {
"first": "Kato",
"last": "Richardson"
}
}
}

And my code:

var fb = new Firebase("https://xxxxxx.firebaseio.com");
var norm = new Firebase.util.NormalizedCollection(
fb.child('login'),
fb.child('profile')
);

Any idea what am I doing wrong?

[katowulf]

Hrm. That doesn't sound right. Can you create a minimal repro including steps and version info?

[iclems]

Getting exact same error using React:

import React, {
Component,
} from 'react';
import {
Linking,
Platform,
ActionSheetIOS,
Dimensions,
View,
Text,
Navigator,
} from 'react-native';
import ReactFireMixin from 'reactfire';
import Firebase from 'firebase';
import FirebaseUtil from 'firebase-util';