# File lib/buildr/java/jtestr_result.rb, line 101
        def tweak_backtrace(error)
          return if error.backtrace.nil?
          error.backtrace.collect! do |line|
            clean_up_double_slashes(line)
            ignore_patterns.each do |ignore|
              if line =~ ignore
                line = nil
                break
              end
            end
            line
          end
          error.backtrace.compact!
        end