+1

I am getting this on 0.46

Alright seems like I've managed to fix this on RN 0.45.1
Just clean everything:

watchman watch-del-all
rm -rf $TMPDIR/react-*
rm -rf yarn.lock
rm -rf ./node_modules
yarn install

Worked for me, also unlinking and linking might help.

Face same problem when creating new project with Ignite.

• react-native -V 0.45.1
• node -v v7.10.0
• npm -v 4.2.0
• yarn --version 0.27.5
• react-native run-ios

@Amurmurmur suggestion didn't help.

Found the problem what I had (with new project generated with Ignite).

The error were pointing in my project to line import rootSaga from '../Sagas/' which contain export like this:

export default function * root () {
  yield [
    // ... snip ....
  ]
}

After changing it to this started to work:

const root = function * root () {
  yield [
    // .... snip ....
  ]
}
export default root

I'm not yet familiar with the ES6 generator functions and require support for them, but at least now I can continue. And have to say that the error were pointing to the place where the invalid export were. I hope this helps someone.

infinitered/ignite#1098 (comment)

Wasn't this fixed here? e7c1cf5

So this won't roll out till 0.47?

Tried to fix with the suggested Saga solution, its surely something to do with saga because when I comment out saga implementation in my configureStore, the error is gone however trying suggested solution doesnt work for me. :/

@grabbou @GantMan @ernoaapa
Alright guys, figured out the problem
downgraded babel-preset-react-native form 2.1.0 to 2.0.0 all works fine on Android/iOS
Though once upgraded to 0.46 the error comes back.
As for RN 0.47-rc.0, most packages I have linked, wont work due to some changes to the api of the react-native I guess because they will throw errors such as:

:react-native-blur:compileReleaseJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
/Users/amurmurmur/exampleapp/node_modules/react-native-blur/android/src/main/java/com/cmcewen/blurview/BlurViewPackage.java:23: error: method does not override or implement a method from a supertype
    @Override
    ^
Note: /Users/amurmurmur/exampleapp/node_modules/react-native-blur/android/src/main/java/com/cmcewen/blurview/BlurringView.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
1 error
:react-native-blur:compileReleaseJavaWithJavac FAILED

@Amurmurmur I am still seeing the issue on 0.45.1 even after downgrading babel. I wonder how much node and npm versions might be affecting which fixes work and which ones don't.
node: v8.1.0
npm: 5.1.0
OS: macOS Sierra 10.12.5

@kcalmes Make sure you reset react-native packager after you've downgraded babel with:

npm start -- --reset-cache