Hi, I would like to participate in GSoC 2017 and I have chosen the Use unsigned integral type for collection of bits , idea from the Micro projects list. I request the help of the community for clarifying a few questions that I have. 1. Is this Microproject already taken ? 2. If it is free , I would like to point out one place where a signed int is used . In bisect.h , the structure struct rev_list_info uses flags of type signed int but , the value of MSB is not checked as a test case for any error checking. Hence it can be of type unsigned int. It is only used in rev-list.c for checking cases (BISECT_SHOW_ALL and REV_LIST_QUIET ). Is this a valid case. Thanks.