crashing poly~ and groove~ patch

I made a patch with poly~ and groove~ that plays one of four samples randomly from a buffer and segments of each sample contained in the buffer. Only problem is it's making Max crash.... Anyone know why this would be? I have also tried explicitly targeted specific instances of the poly~ object and it wont work. Help would be appreciated because it's a pretty nifty little weird thing. This is a simplified version of course. Here's the patch:

here's the poly~ patch that goes in the max library duh