std::regex_match of the leading path may run out of stack with long paths in debug build. Using rfind instead to lookup the last '/' in in pathname and skip it if found. Fixes #4464 Signed-off-by: Benny Halevy <bhalevy@scylladb.com> Message-Id: <20190505144133.4333-1-bhalevy@scylladb.com>