Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 5.2.0

Describe the bug
When you delete a file, you will see exception in terminal but nothing happens with app on device. It continue to work.

To Reproduce

1. tns create app
2. tns run ios/android --bundle
3. detele a file
4. app works

Expected behavior
error on device