.be/efbfbf51-73d2-4ae6-8331-5d0a2fdf1685/bugs/bc85f1a9-d7af-4af9-bbe3-a1d5c25e9d61/comments/0346329e-7fa7-48d1-a2d9-a510d340edb2/body

   1 $ bin/sawsim -s folded,hooke,1 -N1 -s unfolded,null -k 'folded,unfolded,bell,{,1}' -q folded
   2 #Force (N)      Initial state   Final state
   3 sawsim: build/k_model.c:174: bell_k: Assertion `p->knot > 0' failed.
   4 Aborted