au run --watch stops when less code doesn't compile

[s5no5t]

I'm submitting a bug report

Library Version:
0.21.0

Please tell us about your environment:

• Operating System:
  Windows 10

• Node Version:
  6.6.0

• NPM Version:
  3.10.3

• Language:
  Less

Current behavior:
When creating a new project using au new and choosing less as the css processor, the task au run --watch stops when there is a less file that doesn't compile (invalid syntax for example).

Expected/desired behavior:

• create a new project with au new, select less as the css processor
• run au run --watch
• create a file temp.less within src/resources, containing only "{"
• the watcher stops

• What is the expected behavior?
  au run --watch should not stop when a less file currently doesn't compile. It should just write an error to the console.
• What is the motivation / use case for changing the behavior?
  This breaks the otherwise extremely nice workflow of having the editor set to autosave and having the watch process run in the background, especially because you only notice it when the browser stops updating.