Watchman keep crashing when I developing react-native

Question

1. OS:macOS 10.12.6
2. node -v 6.9.0 npm -v 3.10.8
3. watchman -v 4.9.0 installed via brew
4. create-react-native-app --version:1.0.

As I found, watchman fails to work after I change several files, although it works perfectly if nothing changed. Then I tried watchman watch-del-all && watchman shutdown-server && npm start --reset-cache. It just crashes.

Anyone can help out of this? Googled for several solutions,but it just cannot work? Tell me if any other information is in need.

Danelledanete