Julia: Poles and Roots of Log(z)

Question

Testing the Julia's package RootsAndPoles.jl v2.0.0 for the (complex) logarithm f(z)=log(z) with standard (default) parameters as described on GitHub by Piotr Kowalczyk I obtain the following result in a moderate domain around the origin

number of roots: 1
number of poles: 1

While the result for the root z=1 is clear I do not understand the meaning/outcome of the pole at z=-1. Even for a non-standard branch cut, the Log 'function' has no pole at z=-1 in contrast to the findings in the figure.

Is there a bug in the Julia package or do I overlook anything?