extract_file_and_line_number

# File actionpack/lib/action_dispatch/middleware/exception_wrapper.rb, line 168
      def extract_file_and_line_number(trace)
        # Split by the first colon followed by some digits, which works for both
        # Windows and Unix path styles.
        file, line = trace.match(/^(.+?):(\d+).*$/, &:captures) || trace
        [file, line.to_i]
      end