Different behavior when debugging / not debugging

[MujtabaFR]

Hello,
I noticed that Realm is behaving very differently according to wither debugging or not

This is just a summary of the idea :
I'm printing object.constructor.name to find the type of the object

When debugging (Remotely using Chrome or Safari) :

let realm = new Realm(config);
realm.constructor.name --> will print (Realm)

let dogs = realm2.objects('Dog');
dogs.constructor.name --> will print (Results)

(inserting few dogs)

for (let oneDog of dogs) {
    oneDog.constructor.name --> will print (RealmObject)
} --> works perfectly

When not debugging:

let realm = new Realm(config);
realm.constructor.name --> will print (Object)

let dogs = realm2.objects('Dog');
dogs.constructor.name --> will print nothing

(inserting few dogs)

for (let oneDog of dogs) {
    oneDog.constructor.name --> not compiled
} --> will give the error below

TypeError: undefined is not a function (evaluating ‘_iteratortypeof Symbol === “function” ? Symbol.iterator : “@@iterator”’)

I noticed the problem because I can't get the results of query from Realm when not debugging,
I'm not sure if it's a bug or a problem with my codes

Version of Realm and Tooling

• Realm JS SDK Version: 2.10.0
• React Native: 0.55.4
• Client OS & Version: Running on Android device 8.0
• Which debugger for React Native: Chrome

Full code :

import React, { Component } from 'react';
import { View, Text } from 'react-native';

const Realm = require('realm');

export default class Page3Screen extends Component {
  state = { messege : 'no messege' }

  componentWillMount() {
    const config = {
      schema: [{ name: 'Dog', properties: { name: 'string' } }],
    };
    let realm = new Realm(config);
    console.log(realm.constructor.name);
    this.setState({ messege: realm.constructor.name });

    realm.write(() => {
      realm.create('Dog', { name: 'Zozo' });
    });

    let dogs = realm.objects('Dog');
    // console.log(dogs.constructor.name);
    // this.setState({ messege: dogs.constructor.name });

    // for (let oneDog of dogs) {
    //    console.log(oneDog.constructor.name);
    //    this.setState({ messege: oneDog.constructor.name });
    // }
  }

  render() {
    return (
      <View style={{ alignSelf: 'stretch', flex: 1, alignItems: 'center', justifyContent: 'center' }}>
        <Text>{this.state.messege}</Text>
      </View>
    );
  }
}

[kneth]

The error message is related to facebook/react-native#15902.

[MujtabaFR]

Thanks .. the suggested updating the JSC version that ships with android solved the issue

[kneth]

@MujtabaFR Great to hear!

[FibreFoX]

@MujtabaFR I might have found a comment reflecting the different behaviour:
facebook/react-native#18426 (comment)

Meanwhile using the newer JSC-version on android helps a lot, especially when using newer versions of RN like 0.57.2 and above.