Fatal Exception: com.facebook.jni.UnknownCppException: Unknown

[spacepluk]

I'm getting this crash on a production app but I can't reproduce it on any of my devices. Any pointers about what I should be looking at?

Fatal Exception: com.facebook.jni.UnknownCppException: Unknown at com.facebook.react.bridge.NativeMap.toString(NativeMap.java) at com.swmansion.reanimated.NativeProxy$EventHandler.receiveEvent(NativeProxy.java) at com.swmansion.reanimated.NativeProxy$EventHandler.receiveEvent(NativeProxy.java:60) at com.swmansion.gesturehandler.react.RNGestureHandlerStateChangeEvent.dispatch(RNGestureHandlerStateChangeEvent.java:80) at com.swmansion.reanimated.NodesManager.handleEvent(NodesManager.java:485) at com.swmansion.reanimated.NodesManager.onEventDispatch(NodesManager.java:462) at com.facebook.react.uimanager.events.EventDispatcherImpl.dispatchEvent(EventDispatcherImpl.java:116) at com.swmansion.gesturehandler.react.RNGestureHandlerModule.onStateChange(RNGestureHandlerModule.java:691) at com.swmansion.gesturehandler.react.RNGestureHandlerModule.access$300(RNGestureHandlerModule.java:42) at com.swmansion.gesturehandler.react.RNGestureHandlerModule$1.onStateChange(RNGestureHandlerModule.java:436) at com.swmansion.gesturehandler.GestureHandler.dispatchStateChange(GestureHandler.java:81) at com.swmansion.gesturehandler.GestureHandlerOrchestrator.onHandlerStateChange(GestureHandlerOrchestrator.java:200) at com.swmansion.gesturehandler.GestureHandler.moveToState(GestureHandler.java:350) at com.swmansion.gesturehandler.GestureHandler.cancel(GestureHandler.java:444) at com.swmansion.gesturehandler.GestureHandler$1.run(GestureHandler.java:112) at android.os.Handler.handleCallback(Handler.java:836) at android.os.Handler.dispatchMessage(Handler.java:103) at android.os.Looper.loop(Looper.java:203) at android.app.ActivityThread.main(ActivityThread.java:6251) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1063) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:924)

... "react-native": "0.64.0", "react-native-reanimated": "^2.0.1", "react-native-gesture-handler": "^1.10.3", ...

Thanks

[jgonet]

This may be related to #2018. Try checking if you may throw exceptions inside worklets.