On 09/10/2012 05:25 PM, Stefan Monnier wrote:

> Hmm... how can we find those?  I guess we could handle it during GC when
> we mark the BLV.
[...skip...]
> I think here as well the problem is how to find those windows, and again
> I think the easiest is to do it during GC.

Like this?

Dmitry