This is not a well documented feature, but I am trying to track what happens when this statement is used. Just where does it return? How can you tell what line of code will be executed next? It would seem desirable to have a statement like 'set master', and know that is where you end up if you make the call.
It certainly seems to change its mind about where to go if you set step on, and I can't think of any way to find where it is going in a piece of code I am looking at.

Anyone know?