Item_func_like calls escape_item->fix_fields() twice

this happens if Item_func_like is copied (get_copy()).
after one copy gets fixed, the other tries to fix escape item again.

mysql-test/r/func_like.result

@@ -289,3 +289,8 @@ a	b	c	d
 3 f_	1	0	1
 3 f\_	0	1	0
 drop table t1;
+create table t1 (f int);
+insert t1 values (1),(2);
+select 1 from (select distinct * from t1) as x where f < (select 1 like 2 escape (3=1));
+1
+drop table t1;

mysql-test/t/func_like.test

@@ -187,7 +187,7 @@ DROP TABLE t1;
 --echo #
 
 #
-# Item_func_line::print()
+# Item_func_like::print()
 #
 create view v1 as select 'foo!' like 'foo!!', 'foo!' like 'foo!!' escape '!';
 show create view v1;
@@ -207,3 +207,11 @@ insert t1 (a) values ('3 f_'), ('3 f\_');
 set sql_mode=default;
 select * from t1;
 drop table t1;
+
+#
+# Item_func_like::fix_fields()
+#
+create table t1 (f int);
+insert t1 values (1),(2);
+select 1 from (select distinct * from t1) as x where f < (select 1 like 2 escape (3=1));
+drop table t1;

sql/item_cmpfunc.cc

@@ -5413,7 +5413,7 @@ bool Item_func_like::fix_fields(THD *thd, Item **ref)
 {
   DBUG_ASSERT(fixed == 0);
   if (Item_bool_func2::fix_fields(thd, ref) ||
-      escape_item->fix_fields(thd, &escape_item) ||
+      (!escape_item->fixed && escape_item->fix_fields(thd, &escape_item)) ||
       fix_escape_item(thd, escape_item, &cmp_value1, escape_used_in_parsing,
                       cmp_collation.collation, &escape))
     return TRUE;