Okay, I finally give. For purposes of liveness tracing and GC, we're
going to unify PMCs and strings/buffers. This means we trace through
strings and buffers if the flags are right, and we need to add a GC
link pointer to strings/buffers. It'll make things a bit larger,
which I don't like, but it lifts some restrictions I see looming,
which I do like.

Anyone care to take a shot at this?
--
                                         Dan

--------------------------------------"it's like this"-------------------
Dan Sugalski                          even samurai
d...@sidhe.org                         have teddy bears and even
                                       teddy bears get drunk