Big time WTF with generators - bug?

[Paul Rubin]

James Stroud <jstroud at mbi.ucla.edu> writes:
> I can see I didn't explain so well. This one must be a bug if my code
> looks good to you.

I didn't spot any obvious errors, but I didn't look closely enough
to say that the code looked good or bad.

> Conclusion: something consumes my generator going from inside the loop
> to outside.

I'm not so sure of this, the thing is you're building these internal
grouper objects that don't expect to be consumed in the wrong order, etc.

Really, I'd try making a test iterator that prints something every
time you advance it, then step through your function with a debugger.