def print_exception(current_location, exception, destination = nil)
      if !exception.is_a?(SystemExit)
        data = exception.backtrace_string(current_location)
        if defined?(DebugLogging) && self.is_a?(DebugLogging)
          error(data)
        else
          destination ||= STDERR
          destination.puts(data)
          destination.flush if destination.respond_to?(:flush)
        end
      end
    end
def print_exception(current_location, exception, destination = nil)
      if !exception.is_a?(SystemExit)
        data = exception.backtrace_string(current_location)
        if defined?(DebugLogging) && self.is_a?(DebugLogging)
          error(data)
        else
          destination ||= STDERR
          destination.puts(data)
          destination.flush if destination.respond_to?(:flush)
        end
      end
    end
Print the given exception, including the stack trace, to STDERR.

 +current_location+ is a string which describes where the code is
 currently at. Usually the current class name will be enough.
 It may be nil.

 This method requires 'ruby_core_enhancements'. If 'debug_logging'
 is loaded and included in the current module, it will use that for
 logging.