crash in iOS build, not in simulator.

Hey all,

I’m really perplexed by an issue with my app. I’m loading some data from async-storage at the sign-in screen of my app. When I run it in the iOS simulator, I don’t have any problems. However, on my iOS build I am getting a white screen.

The first storage call seems to work fine. If I comment out the two other calls afterward, then the white screen never happens on the build (but I obviously don’t get the stored data). I’ve listed some code below.

componentDidMount() {

	// get the correct background image
	AsyncStorage.getItem('APPbackground').then(result => {
		if (result !== null) {
			this.props.setBackground(result);
		}
	});

	// check to see if there is an existing userID
	if (this.props.makeNewUser === false) {
		AsyncStorage.getItem('APPuserID')
			.then(userIDResult => {
				if (userIDResult !== null) {
					this.props.storeUserID(userIDResult);

					// stored password?
					AsyncStorage.getItem('APPuserPass')
					.then(passwordResult => {
						if (passwordResult !== null) {
							// code here to handle the sign in
						} else {
							// console.warn('no password info');
						}
					})
					.catch(error => {
						// error trying to locate login information
						// I show an Alert here
					});
				} else {
					// should we create a new user account?
					// I show an Alert here
				}
			})
			.catch(error => {
				// error trying to locate login information
				// I show an Alert here
			});
	} else {
		// change the settings to reflect a new user rather than a sign-in
		this.props.setLoginText('Create');
		// I show an Alert here
	}

}

I’ve also changed the code to use something like the following as well, but I’m having the same issue.

async _myFunc() {
	try {
		const userIDResult = await AsyncStorage.getItem('WMMuserID');
        } catch (error) {
            // Alert here
        }
}

Expected behavior

• No crash on iOS build.
• Error thrown on simulator.

Repro steps

??? Not sure if it can be reproduced.

Environment

• Async Storage version: 1.6.1
• React-Native version: 0.60.4
• Platform tested: iOS 12.4, 12.3.1

[infiniteline]

I pulled out all the subsequent code just to test the asyncStorage gets. It works, so there must be something else later in the pipeline that is causing the problem. If it turns out to be related to asyncStorage, I’ll post it, but I’ll close the issue for now. Thank you for all your help @Krizzu!

[codeoholic]

I faced the same issue but realised integers and boolean caused it. Used JSON.stringify and it works like a charm.