An exception "cannot dereference end map/set iterator" in polygon_arbitrary_formation.hpp

While using Polygon Set Data Object void get(output_container& output) to get fractures of a complex polygon, line#1754 in polygon_arbitrary_formation.hpp caused the exception. The exception happened since line#1687 in polygon_arbitrary_formation.hpp. In line#1687, it increases value of "iter" to get out "while" loop . After the while loop, value of "iter" is null which is used in line#1754 to cause the exception happened.