sum_comp was using an uninitialized shared pointer as the base zero composition. It was throwing an error that looked like : Assertion failed: (px != 0), function operator*. That problem is now fixed.
sum_comp was using an uninitialized shared pointer as the base zero composition. It was throwing an error that looked like : Assertion failed: (px != 0), function operator*. That problem is now fixed.

katyhuff/cyder,katyhuff/cyder,katyhuff/cyder,katyhuff/cyder