Hm. Sounds like they added them --- nested functions certainly weren't supported the last time I looked (because, as you say, they're far too useful, and I hated having to give them up).
Have you had any reports about problems on, e.g., OpenBSD, related to needing an executable stack?
Could be, it's moving fast. Once I realized I could use nested functions to provide anonymous functions and deferred actions with decent syntax in a semi-standardized way, I was hooked :)
Nothing, but I seldom hang around in the BSD crowd these days.
Have you had any reports about problems on, e.g., OpenBSD, related to needing an executable stack?