Fix new member

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/chat/receive/MessageSvc.kt

@@ -137,11 +137,11 @@ internal class MessageSvc {
 
         object EmptyResponse : GetMsgSuccess(emptyList())
 
-        private suspend fun MsgComm.Msg.getNewGroup(bot: QQAndroidBot): Group {
+        private suspend fun MsgComm.Msg.getNewGroup(bot: QQAndroidBot): Group? {
             val troopNum = bot.network.run {
                 FriendList.GetTroopListSimplify(bot.client)
                     .sendAndExpect<FriendList.GetTroopListSimplify.Response>(retry = 2)
-            }.groups.first { it.groupUin == msgHead.fromUin }
+            }.groups.firstOrNull { it.groupUin == msgHead.fromUin } ?: return null
 
             @Suppress("DuplicatedCode")
             return GroupImpl(
@@ -217,7 +217,7 @@ internal class MessageSvc {
                                 }
                                 // 新群
 
-                                val newGroup = msg.getNewGroup(bot)
+                                val newGroup = msg.getNewGroup(bot) ?: return@mapNotNull null
                                 bot.groups.delegate.addLast(newGroup)
                                 return@mapNotNull BotJoinGroupEvent(newGroup)
                             } else {

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/chat/receive/OnlinePush.kt

@@ -416,17 +416,19 @@ internal class OnlinePush {
                 bot.network.logger.debug { "OnlinePush528 0x44L: " + msg._miraiContentToString() }
                 return@lambda528 emptySequence()
             },
-            // bot 被踢
+            // bot 在其他客户端被踢或主动退出而同步情况
             0xD4L to lambda528 { bot ->
                 @Serializable
                 data class SubD4(
+                    // ok
                     val uin: Long
                 ) : ProtoBuf
 
                 val uin = vProtobuf.loadAs(SubD4.serializer()).uin
                 val group = bot.getGroupByUinOrNull(uin) ?: bot.getGroupOrNull(uin)
-                // 08 E7 C1 AD B8 02
-                return@lambda528 group?.let { sequenceOf(BotKickEvent(group)) } ?: emptySequence()
+                return@lambda528 if (group != null && bot.groups.delegate.remove(group)) {
+                    sequenceOf(BotLeaveEvent(group))
+                } else emptySequence()
             },
             // ModFriendRemark, DelFriend
             0x27L to lambda528 { bot ->