})
	}
	if text := r.FormValue("logtext"); text != "" {
		name = append(name, fmt.Sprintf("log contains %q", text))
		conditions = append(conditions, func(_ *parsedTrace, task *trace.UserTaskSummary) bool {
			return taskMatches(task, text)
		})
	}

	return &taskFilter{name: strings.Join(name, ","), cond: conditions}, nil
}

func taskInterval(t *parsedTrace, s *trace.UserTaskSummary) interval {
	var i interval