fix(stream): fix memory leak.

source/libs/stream/src/streamCheckpoint.c

@@ -119,6 +119,7 @@ static int32_t appendCheckpointIntoInputQ(SStreamTask* pTask, int32_t checkpoint
   pChkpoint->blocks = taosArrayInit(4, sizeof(SSDataBlock));//pBlock;
   taosArrayPush(pChkpoint->blocks, pBlock);
 
+  taosMemoryFree(pBlock);
   if (tAppendDataToInputQueue(pTask, (SStreamQueueItem*)pChkpoint) < 0) {
     taosFreeQitem(pChkpoint);
     return TSDB_CODE_OUT_OF_MEMORY;
@@ -163,6 +164,8 @@ int32_t streamProcessCheckpointBlock(SStreamTask* pTask, SStreamDataBlock* pBloc
 
   // set the task status
   pTask->checkpointingId = checkpointId;
+
+  // set task status
   pTask->status.taskStatus = TASK_STATUS__CK;
 
   //todo fix race condition: set the status and append checkpoint block
@@ -211,6 +214,7 @@ int32_t streamProcessCheckpointBlock(SStreamTask* pTask, SStreamDataBlock* pBloc
     code = continueDispatchCheckpointBlock(pBlock, pTask);
   }
 
+  streamFreeQitem((SStreamQueueItem*)pBlock);
   return code;
 }