Fix IllegalStateException when losing packet

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt

@@ -531,6 +531,7 @@ internal class QQAndroidBotNetworkHandler(coroutineContext: CoroutineContext, bo
 
         val cache = cachedPacket.value
         if (cache == null) {
+            kotlin.runCatching {
                 // 没有缓存
                 var length: Int = rawInput.readInt() - 4
                 if (rawInput.remaining == length.toLong()) {
@@ -560,6 +561,10 @@ internal class QQAndroidBotNetworkHandler(coroutineContext: CoroutineContext, bo
                     cachedPacketTimeoutJob?.cancel()
                     return
                 }
+            }.getOrElse {
+                cachedPacket.value = null
+                cachedPacketTimeoutJob?.cancel()
+            }
         } else {
             // 有缓存
             val expectingLength = expectingRemainingLength