closure vars typeinfo

[Adam D. Ruppe]

I'm catching up on the dconf videos tonight and just watched the 
precise garbage collector one, where he said there's no info for 
closures. Would it work if the closure's void* went to something 
along these lines?

struct Closure {
    // magic a magic number to help identify this block
    size_t number_of_variables_captured;
    TypeInfo[number_of_vars_captured] capturedVarTypes;

    // whatever else is needed

    ubyte[xx] capturedVars;
}

The gc could read this and it might be useful for debugging too.

But I'm mostly just wondering if you guys thought any more about 
how to (or if you want to) tackle this at the conference.