Undefined behavior in termination-memory-linkedlists

[xvitovs1]

I believe there can be signed integer underflow in termination-memory-linkedlists/cll_by_lseg-alloca_false-termination.c.i. In main 0 is passed as n to new_cll, hence -1 is passed to new_lseg as n which is recursively called with n = n - 1. As there is no condition stopping the recursion in this case, there can be integer underflow which leads to undefined behavior. Can somebody please confirm this issue?

[xvitovs1]

@dbeyer I am not sure how to fix this issue. Can somebody have a look at this benchmark, please?