def stack_size
      return 0 unless backtrace

      backtrace.drop_while { |l| ignored_file?(l.first.path) }
               .take_while { |l| !ignored_file?(l.first.path) }
               .size
    end
def stack_size
      return 0 unless backtrace

      backtrace.drop_while { |l| ignored_file?(l.first.path) }
               .take_while { |l| !ignored_file?(l.first.path) }
               .size
    end
Context's stack size