diff --git a/src/backend/access/heap/heapam_handler.c b/src/backend/access/heap/heapam_handler.c
index 2168259247..730ef9b5a2 100644
--- a/src/backend/access/heap/heapam_handler.c
+++ b/src/backend/access/heap/heapam_handler.c
@@ -138,6 +138,10 @@ heapam_index_fetch_tuple(struct IndexFetchTableData *scan,
 			heap_page_prune_opt(hscan->xs_base.rel, hscan->xs_cbuf);
 	}
 
+uint64 r = 0;
+for (uint64 i = 0; i < 100000; i++) r += (r ^ i);
+Assert(r != 0);
+
 	/* Obtain share-lock on the buffer so we can examine visibility */
 	LockBuffer(hscan->xs_cbuf, BUFFER_LOCK_SHARE);
 	got_heap_tuple = heap_hot_search_buffer(tid,