How would shallow generators compose with lambda?

[Brendan Eich]

On May 14, 2009, at 2:10 PM, Mark S. Miller wrote:

> It seems that either lambda or generators by themselves may be ok, but
> together they make a fatal combination. Whichever we might eventually
> decide to add to Harmony, we probably forever preclude the other. I do
> not yet have an opinion on which.

Just to be extra clear (for my benefit, at least ;-), is the problem  
the finally-may-not-run issue?

If so, did you have a different way of reasoning about the reasons  
today why finally might not run that I mentioned (iloop detection or  
other hard stop)?

/be