fix: ignore the duration of out-of-bound rules (#1019)

model/alertrule.go

@@ -109,12 +109,12 @@ func (r *AlertRule) Check(points [][]bool) (int, bool) {
 			continue
 		} else {
 			// 常规报警
-			if duration > durations[ruleIndex] {
-				durations[ruleIndex] = duration
-			}
 			if hasPassedRule = boundCheck(len(points), duration, hasPassedRule); hasPassedRule {
 				continue
 			}
+			if duration > durations[ruleIndex] {
+				durations[ruleIndex] = duration
+			}
 			total, fail := duration, 0
 			for timeTick := len(points) - duration; timeTick < len(points); timeTick++ {
 				if !points[timeTick][ruleIndex] {