for matchn, match := range route.Match {
			dupn, ok := matchesEncountered[asJSON(match)]
			if ok {
				reportIneffective(routeName(route, rulen), requestName(match, matchn), routeName(routes[dupn], dupn))
				duplicateMatches++
				// no need to handle for totally duplicated match rules
				continue
			}
			matchesEncountered[asJSON(match)] = rulen