[ODE] crash on collision test

[Barak]

Hello. This is my first time writing here, and
unfortunately, it's for a problem :\

after having set up everything, I check for collisions
with dSpaceCollide, and step the world. after 2 steps
the program locks up calling dSpaceCollide; it doesn't
even call my collision function (while in the previous
2 steps, it did). what could be wrong?
note that it does not depend on the step size.

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