diff --git a/source/libs/executor/src/timesliceoperator.c b/source/libs/executor/src/timesliceoperator.c
index 8cd547e333..b14f4f0266 100644
--- a/source/libs/executor/src/timesliceoperator.c
+++ b/source/libs/executor/src/timesliceoperator.c
@@ -1249,10 +1249,11 @@ void destroyTimeSliceOperatorInfo(void* param) {
   }
 
   cleanupExprSupp(&pInfo->scalarSup);
-
-  for (int32_t i = 0; i < pInfo->pFillColInfo->numOfFillExpr; ++i) {
-    taosVariantDestroy(&pInfo->pFillColInfo[i].fillVal);
+  if (pInfo->pFillColInfo != NULL) {
+    for (int32_t i = 0; i < pInfo->pFillColInfo->numOfFillExpr; ++i) {
+      taosVariantDestroy(&pInfo->pFillColInfo[i].fillVal);
+    }
+    taosMemoryFree(pInfo->pFillColInfo);
   }
-  taosMemoryFree(pInfo->pFillColInfo);
   taosMemoryFreeClear(param);
 }