Version

2.3.3

Reproduction link

http://jsfiddle.net/zna06rq4/1/

Steps to reproduce

Run fiddle, error will be shown in console:

Error in callback for watcher "hello": "TypeError: this.cb.call is not a function"

What is expected?

"child" should be logged to the console via the watch handler in Child.

What is actually happening?

The watch is not being fired

In strats.watch (

The fix for this seems to be updating line 175 to have:
Array.isArray(child) ? child : [child]