App doesn't start after Realm installation, error: com.facebook.react.JavaScript (12): EXC_BAD_ACCESS IOS

[ThunbergOlle]

Expected Results

Being able to render and start my app while Realm is installed

Actual Results

Error when running on device: com.facebook.react.JavaScript (12): EXC_BAD_ACCESS (code=2, address=0x100f0ea4c)

It also highlights this part of RealmReact.mm

void _initializeOnJSThread(JSContextRefExtractor jsContextExtractor) {
    // Make sure the previous JS thread is completely finished before continuing.
    static __weak NSThread *s_currentJSThread;
    while (s_currentJSThread && !s_currentJSThread.finished) {
        [NSThread sleepForTimeInterval:0.1];
    }
    s_currentJSThread = [NSThread currentThread];

    RJSInitializeInContext(jsContextExtractor()); // <----------------------
}

Code Sample

I have not written any Realm Code yet.

Version of Realm and Tooling

• Realm JS SDK Version: ^10.6.1
• Node or React Native: React Native
• Client OS & Version: iOS 14.6

[takameyer]

@ThunbergOlle Thanks for reporting. We will look into this, but I want to clarify a few things.

• Does this happen to you with a clean React Native project?
• Have you activated Hermes for your project? We are currently working on Hermes support.
• Could you possibly share what packages you are using for your project? Perhaps we have a conflict with one of them.

[nguyenthanhtruongntt85]

@takameyer takeme

the same bug, my package.json

"dependencies": {
"@expo/react-native-action-sheet": "3.9.0",
"@nartc/react-native-barcode-mask": "1.2.0",
"@react-native-community/async-storage": "1.12.1",
"@react-native-community/datetimepicker": "3.5.2",
"@react-native-community/netinfo": "6.0.0",
"@react-navigation/bottom-tabs": "5.11.11",
"@react-navigation/core": "5.15.3",
"@react-navigation/devtools": "5.1.22",
"@react-navigation/drawer": "5.12.5",
"@react-navigation/material-top-tabs": "5.3.15",
"@react-navigation/native": "5.9.4",
"@react-navigation/routers": "5.7.2",
"@react-navigation/stack": "5.14.5",
"@sentry/react-native": "2.6.0",
"i18next": "20.3.4",
"lodash": "4.17.21",
"moment": "2.29.1",
"moment-timezone": "0.5.33",
"react": "17.0.1",
"react-i18next": "11.11.3",
"react-native": "0.64.2",
"react-native-a-beep": "1.1.0",
"react-native-actions-sheet": "0.4.9",
"react-native-camera": "4.0.0",
"react-native-code-push": "7.0.1",
"react-native-config": "1.4.2",
"react-native-device-info": "8.1.3",
"react-native-easy-icon": "1.0.7",
"react-native-fast-image": "8.3.6",
"react-native-gesture-handler": "1.10.3",
"react-native-image-crop-picker": "0.36.2",
"react-native-keyboard-aware-scroll-view": "0.9.4",
"react-native-linear-gradient": "2.5.6",
"react-native-modal": "12.0.2",
"react-native-modal-datetime-picker": "10.2.0",
"react-native-reanimated": "2.2.0",
"react-native-root-siblings": "4.1.1",
"react-native-root-toast": "3.2.1",
"react-native-safe-area-context": "3.2.0",
"react-native-safe-area-view": "1.1.1",
"react-native-screens": "3.4.0",
"react-native-splash-screen": "3.2.0",
"react-native-static-safe-area-insets": "2.1.1",
"react-native-status-bar-height": "2.6.0",
"react-native-system-setting": "1.7.6",
"react-native-vector-icons": "8.1.0",
"realm": "10.6.1",
"rn-fetch-blob": "0.12.0"
}

[nguyenthanhtruongntt85]

@takameyer takeme

I already know the reason because enabling Hermes on IOS, Android.
How to fix?

[kneth]

@nguyenthanhtruongntt85 We are working on Hermes support - see #3792. You will have to use JavaScriptCore, and you might have to downgrade Reanimated and other dependencies.

[ThunbergOlle]

Okay! The issue was related to Hermes as @kneth pointed out.