Expo go instantly crashes without error message (React Native)

user_16273638 0
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Problem:

Hey Stackoverflow. Because of internet issues, I was testing my react native app last week only in the web emulator. Now I wanted to try it in the Expo go, mobile emulator. But as soon as I connect to the project and the js is fully built, the whole app crashes without an error message.

What I have tried to fix it:

I now connected my phone to my windows pc and ran this logcat command: adb logcat *:S ReactNative:V ReactNativeJS:V to get the error message this way. But I can't figure out what the problem is.

The logcat command logs this when I run the app:

10-19 13:54:39.731  9429 11453 I ReactNativeJS: Running "main" with {"initialProps":{"exp":{}},"rootTag":1}
10-19 13:54:39.801  9429 11453 W ReactNativeJS: Constants.installationId has been deprecated in favor of generating and storing your own ID. Implement it using expo-application's androidId on Android and a storage API such as expo-secure-store on iOS and localStorage on the web. This API will be removed in SDK 44.
10-19 13:54:46.209  9429 11682 I ReactNativeJS: Running "main" with {"initialProps":{"exp":{"initialUri":"exp://192.168.1.111:19000","shell":false,"manifestString":"{\"name\":\"productivity\",\"slug\":\"productivity\",\"version\":\"1.0.0\",\"orientation\":\"portrait\",\"icon\":\".\\/assets\\/icon.png\",\"splash\":{\"image\":\".\\/assets\\/splash.png\",\"resizeMode\":\"contain\",\"backgroundColor\":\"#ffffff\",\"imageUrl\":\"http:\\/\\/192.168.1.111:19000\\/assets\\/.\\/assets\\/splash.png\"},\"updates\":{\"fallbackToCacheTimeout\":0},\"assetBundlePatterns\":[\"**\\/*\"],\"ios\":{\"supportsTablet\":true},\"android\":{\"adaptiveIcon\":{\"foregroundImage\":\".\\/assets\\/adaptive-icon.png\",\"backgroundColor\":\"#FFFFFF\",\"foregroundImageUrl\":\"http:\\/\\/192.168.1.111:19000\\/assets\\/.\\/assets\\/adaptive-icon.png\"}},\"web\":{\"favicon\":\".\\/assets\\/favicon.png\"},\"_internal\":{\"isDebug\":false,\"projectRoot\":\"D:\\\\coding\\\\apps\\\\productivity\",\"dynamicConfigPath\":null,\"staticConfigPath\":\"D:\\\\coding\\\\apps\\\\productivity\\\\app.json\",\"packageJsonPath\":\"D:\\\\coding\\\\apps\\\\productivity\\\\package.json\"},\"sdkVersion\":\"42.0.0\",\"platforms\":[\"ios\",\"android\",\"web\"],\"developer\":{\"tool\":\"expo-cli\",\"projectRoot\":\"D:\\\\coding\\\\apps\\\\productivity\"},\"packagerOpts\":{\"scheme\":null,\"hostType\":\"lan\",\"lanType\":\"ip\",\"devClient\":false,\"dev\":true,\"minify\":false,\"urlRandomness\":\"2s-g42\",\"https\":false},\"mainModuleName\":\"node_modules\\\\expo\\\\AppEntry\",\"__flipperHack\":\"React Native packager is running\",\"debuggerHost\":\"192.168.1.111:19000\",\"logUrl\":\"http:\\/\\/192.168.1.111:19000\\/logs\",\"hostUri\":\"192.168.1.111:19000\",\"bundleUrl\":\"http:\\/\\/192.168.1.111:19000\\/node_modules%5Cexpo%5CAppEntry.bundle?platform=android&dev=true&hot=false&minify=false\",\"iconUrl\":\"http:\\/\\/192.168.1.111:19000\\/assets\\/.\\/assets\\/icon.png\",\"id\":\"UNVERIFIED-192.168.1.111-productivity\",\"isVerified\":true,\"primaryColor\":\"#023C69\"}"}},"rootTag":1}

these are my versions if that is important:

  "dependencies": {
    "@babel/preset-env": "^7.15.8",
    "@react-native-async-storage/async-storage": "^1.15.9",
    "@react-native-community/datetimepicker": "^3.5.2",
    "@react-native-community/masked-view": "^0.1.11",
    "async-storage": "^0.1.0",
    "date-fns": "^2.25.0",
    "expo": "^42.0.4",
    "expo-status-bar": "~1.0.4",
    "react": "16.13.1",
    "react-dom": "16.13.1",
    "react-native": "https://github.com/expo/react-native/archive/sdk-42.0.0.tar.gz",
    "react-native-color-palette": "^2.2.0",
    "react-native-gesture-handler": "^1.10.3",
    "react-native-reanimated": "^1.13.1",
    "react-native-screens": "^3.8.0",
    "react-native-svg": "^12.1.1",
    "react-native-vector-icons": "^8.1.0",
    "react-native-web": "~0.13.12",
    "react-navigation": "^4.4.4",
    "react-navigation-drawer": "^2.7.1",
    "react-navigation-stack": "^2.10.4"
  },

I hope you can help me. Feel free to leave a comment with another logcat command that I can run too.

react-native android-studio android
4 Answers

In my case. I mistakenly typed "fontStyle" instead of "fontSize". It's fine in ios but in an android continuous crashes without showing any errors.

user_161056330

I am not sure if this helps, but I too have been having stability problems with Expo Go. They range from suddenly crashing when I try to run a React Native project from Snack to not getting past the splash screen. I earlier looked at comments of Expo Go on Google Play and found that several people have reported multiple stability issues. While convenient to run RN through Snack online preview, I think I might need to test it via the CLI for my device. I hope that these issues are sorted soon.

user_136472650

In my case, I had a component used a useState hook after first, conditional return:

function Component() {

    // code

    if (condition) {
        return <LoadingScreen />
    }

    ... //code

    const [value, setValue] = useState() // this was causing an error

    return <View>
        ... // code
    </View>

}

When I moved the useState to the top of the function, before the first return, the app stopped crashing

user_107873710

It has been a while, but in my case, I was using flex:'33%' as a style. From experience, if you are using CSS properties that are only supported by the web expo go seems to crash without an error message.

user_86167240
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