Dart fails to parse IPv6 addresses with zone ids on Linux

This:

```dart
main() {
  InternetAddress('fe80::4607:0bff:fea0:7747%enx44070ba07746');
}
```

succeeds on MacOS but fails with:

```
Unhandled exception:
type 'OSError' is not a subtype of type 'List<dynamic>' of 'function result'
```

on Linux.