display_error_message

# File lib/rake/application.rb, line 148
    def display_error_message(ex)
      $stderr.puts "#{name} aborted!"
      $stderr.puts ex.message
      if options.trace
        $stderr.puts ex.backtrace.join("\n")
      else
        $stderr.puts rakefile_location(ex.backtrace)
      end
      $stderr.puts "Tasks: #{ex.chain}" if has_chain?(ex)
      $stderr.puts "(See full trace by running task with --trace)" unless options.trace
    end