I have a sample r_c_shortest_paths use case demonstrated below. However on executing this code, assertion error occurs at 

/usr/include/boost/graph/r_c_shortest_paths.hpp:473: Assertion `p_cur_label->b_is_valid' failed.

I've referred to the prior issue reported at https://svn.boost.org/trac/boost/ticket/11723

However, against his example specified, I can not reproduce the error.