[fix](function) A crash caused by nullptr in json_exists_path

be/src/vec/functions/function_jsonb.cpp

@@ -727,7 +727,7 @@ class FunctionJsonbExtractPath : public IFunction {
                 VectorizedUtils::update_null_map(*result_null_map, *path_null_map, path_const);
             }
 
-            if (0 == simd::count_zero_num(reinterpret_cast<const int8_t*>(data_null_map->data()),
+            if (0 == simd::count_zero_num(reinterpret_cast<const int8_t*>(result_null_map->data()),
                                           input_rows_count)) {
                 return create_all_null_result();
             }

regression-test/data/query_p0/sql_functions/json_functions/test_json_exists_path.out

@@ -117,3 +117,8 @@ true
 12	\N	$.k2	\N
 13	\N	$.k3	\N
 
+-- !test_all_null2 --
+2	{"k1":"v31","k2":{"sub_key":1234.56}}	\N	\N
+4	{"k1":"v31","k2":300}	\N	\N
+6	{"k1":"v31","k2":300}	\N	\N
+

regression-test/suites/query_p0/sql_functions/json_functions/test_json_exists_path.groovy

@@ -163,6 +163,38 @@ suite("test_json_exists_path") {
         exception "Invalid Json Path for value: \$."
     }
 
+    sql """
+        drop table if exists json_exists_path_test2;
+    """
+
+    sql """
+        create table json_exists_path_test2 (
+            id int,
+            json_col json not null,
+            json_path string
+        ) distributed by hash(id) buckets 1 properties("replication_num" = "1");
+    """
+
+    sql """
+        insert into json_exists_path_test2 values
+        (1, '{"k1":"v31","k2":300}', '\$.k1'),
+        (2, '{"k1":"v31","k2":{"sub_key": 1234.56}}', null),
+        (3, '{"k1":"v31","k2": null}', '\$.k2'),
+        (4, '{"k1":"v31","k2":300}', null),
+        (5, '{"id": 123, "name": "doris"}', '\$.'),
+        (6, '{"k1":"v31","k2":300}', null),
+        (7, '{"k1":"v31","k2":{"sub_key": 1234.56}}', null);
+    """
+
+    qt_test_all_null2 """
+        select
+            id
+            , json_col
+            , json_path
+            , json_exists_path(json_col, json_path)
+        from json_exists_path_test2 where id % 2 = 0 order by id
+    """
+
     test {
         sql """
             select json_exists_path(json_col_non_null, '\$.') from json_exists_path_test where id = 5;