MDEV-13189: Window functions crash when using INTERVAL

Interval function makes use of Item_row. Item_row did not correctly mark
with_window_func flag according to its arguments. Fix it by making
Item_row aware of this flag.

mysql-test/r/win.result

@@ -3127,3 +3127,17 @@ NULL	1	0
 1	0	1
 2	0	1
 drop table t1;
+#
+# MDEV-13189: Window functions crash when using INTERVAL function
+#
+create table t1(i int);
+insert into t1 values (1),(2),(10),(20),(30);
+select sum(i) over (order by i), interval(sum(i) over (order by i), 10, 20)
+from t1;
+sum(i) over (order by i)	interval(sum(i) over (order by i), 10, 20)
+1	0
+3	0
+13	1
+33	2
+63	2
+drop table t1;

mysql-test/t/win.test

@@ -1914,3 +1914,12 @@ select max(i) over (order by i),
        max(i) over (order by i) is not null
 from t1;
 drop table t1;
+
+--echo #
+--echo # MDEV-13189: Window functions crash when using INTERVAL function
+--echo #
+create table t1(i int);
+insert into t1 values (1),(2),(10),(20),(30);
+select sum(i) over (order by i), interval(sum(i) over (order by i), 10, 20)
+from t1;
+drop table t1;

sql/item_row.cc

@@ -63,6 +63,7 @@ bool Item_row::fix_fields(THD *thd, Item **ref)
     }
     maybe_null|= item->maybe_null;
     with_sum_func= with_sum_func || item->with_sum_func;
+    with_window_func = with_window_func || item->with_window_func;
     with_field= with_field || item->with_field;
     with_subselect|= item->with_subselect;
   }