Throws exception if fail

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt

@@ -60,15 +60,20 @@ abstract class BotImpl<N : BotNetworkHandler> constructor(
     fun tryReinitializeNetworkHandler(
         cause: Throwable?
     ): Job = launch {
+        var lastFailedException: Throwable? = null
         repeat(configuration.reconnectionRetryTimes) {
             try {
                 reinitializeNetworkHandler(cause)
                 logger.info("Reconnected successfully")
                 return@launch
-            } catch (e: LoginFailedException) {
+            } catch (e: Throwable) {
+                lastFailedException = e
                 delay(configuration.reconnectPeriodMillis)
             }
         }
+        if (lastFailedException != null) {
+            throw lastFailedException!!
+        }
     }
 
     private suspend fun reinitializeNetworkHandler(