Unhandled JS Exception: Unexpected token '

I started facing an issue with running my react native application in iOS device

   Unhandled JS Exception: Unexpected Token '<' no stack

This started happening after i generated the main.jsbundle in react native application using the below curl command

   curl http://localhost:8081/index.ios.bundle -o main.jsbundle 

and added this file in xcode project. This seems to like an issue with parsing of the main.jsbundle file which i added in react-native.
Prior to the above process i tried running the application with localhost:8081 for finding the jsbundle but doesn't help me for ios devices. Code in my develop branch is working fine, but same develop code in my feature branch doesn't work with main.jsbundle.

Did anyone faced similar issue with running react native code in iOS devices.