Killing `ember try:each` breaks local copy, all `ember` commands

If I interrupt or kill `ember try:each`, it seems to throw my application into disarray with a number of different errors:

```
Unexpected end of JSON input
at JSON.parse ()
```

```
Error: Cannot find module './core.json'
```

All subsequent uses of `ember` command are also broken...

`rm -rf node_modules && yarn` fixes it but can take several minutes to install depending on project size. Is there a way to safely interrupt ember try?