Do line numbers work correctly?

It seems like line numbers correctly match only for the first file in a bundle.

For example, source files:

```
/src/normalize.css
/src/style.css
```

Output file:

```
/build/style.css
```

DevTools in Google Chrome opens ./src/normalize.css correctly, and ./src/style.css not (in my case, it opens line # 118, when it should be line # 5. etc.)
