[chuck-users] Why doesn't this work?

Hey guys I'm trying to do a simple chuckle, but something's going wrong when I try to set s.freq... SinOsc s=>dac;Phasor p=>blackhole;p.freq(2);while(1){Math.sqrt(1/p.last())*100=>s.freq;10::ms=>now;}; If I dump "Math.sqrt(1/p.last())*100" I get floating values as expected between 100 and 700, but when I chuck it to s.freq, no sound is output, and s.last() is always 0. Am I missing something or is this a bug?