Merge pull request #8745 from taosdata/fix/TS-676

[TS-676]<fix>: fixed coredump when 'group by' was used

src/query/src/qExecutor.c

@@ -5710,6 +5710,11 @@ static SSDataBlock* doProjectOperation(void* param, bool* newgroup) {
     }
   }
 
+  if (pOperator->status == OP_EXEC_DONE) {
+    *newgroup = false;
+     return NULL;
+  }
+
   while(1) {
     bool prevVal = *newgroup;
 
@@ -5722,7 +5727,7 @@ static SSDataBlock* doProjectOperation(void* param, bool* newgroup) {
       //assert(*newgroup == false);
 
       *newgroup = prevVal;
-      setQueryStatus(pRuntimeEnv, QUERY_COMPLETED);
+      doSetOperatorCompleted(pOperator);
       break;
     }