MDEV-14743: Server crashes in Item_func_match::init_search

Remove non prepared (and so belonging to removed clauses FT functions) from the list.

in later version it will be fixed by building the list during preparation.

mysql-test/r/fulltext.result

@@ -742,5 +742,25 @@ txt1	txt2
 nnn2 x2 y2 ööö2	mmm2 ùùù2
 DROP TABLE t1;
 #
+# MDEV-14743: Server crashes in Item_func_match::init_search
+#
+CREATE TABLE t1 (f VARCHAR(8));
+INSERT INTO t1 VALUES ('foo'),('bar');
+SELECT 'foo' IN (  SELECT f FROM t1 GROUP BY MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE ) );
+'foo' IN (  SELECT f FROM t1 GROUP BY MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE ) )
+1
+SELECT 'foo' IN (  SELECT f FROM t1 GROUP BY MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE )) as f1, MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE ) as f2 from t1 ;
+f1	f2
+1	0
+1	0
+explain extended
+SELECT 'foo' IN (  SELECT f FROM t1 GROUP BY MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE )) as f1, MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE ) as f2 from t1 ;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+Warnings:
+Note	1003	select <expr_cache><'foo'>(<in_optimizer>('foo',<exists>(select `test`.`t1`.`f` from `test`.`t1` where ((<cache>(convert('foo' using latin1)) = `test`.`t1`.`f`) or isnull(`test`.`t1`.`f`)) having <is_not_null_test>(`test`.`t1`.`f`)))) AS `f1`,(match `test`.`t1`.`f` against ('qux' in boolean mode)) AS `f2` from `test`.`t1`
+drop table t1;
+#
 # End of 5.5 tests
 #

mysql-test/t/fulltext.test

@@ -682,6 +682,21 @@ SELECT * FROM t1 WHERE MATCH (txt1,txt2) AGAINST ('ööö1' IN BOOLEAN MODE);
 SELECT * FROM t1 WHERE MATCH (txt1,txt2) AGAINST ('ùùù2' IN BOOLEAN MODE);
 DROP TABLE t1;
 
+
+--echo #
+--echo # MDEV-14743: Server crashes in Item_func_match::init_search
+--echo #
+
+CREATE TABLE t1 (f VARCHAR(8));
+INSERT INTO t1 VALUES ('foo'),('bar');
+
+SELECT 'foo' IN (  SELECT f FROM t1 GROUP BY MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE ) );
+SELECT 'foo' IN (  SELECT f FROM t1 GROUP BY MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE )) as f1, MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE ) as f2 from t1 ;
+explain extended
+SELECT 'foo' IN (  SELECT f FROM t1 GROUP BY MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE )) as f1, MATCH(f) AGAINST ( 'qux' IN BOOLEAN MODE ) as f2 from t1 ;
+
+drop table t1;
+
 --echo #
 --echo # End of 5.5 tests
 --echo #

sql/sql_base.cc

@@ -9550,7 +9550,17 @@ int init_ftfuncs(THD *thd, SELECT_LEX *select_lex, bool no_order)
     DBUG_PRINT("info",("Performing FULLTEXT search"));
 
     while ((ifm=li++))
-      ifm->init_search(no_order);
+#if MYSQL_VERSION_ID < 100213
+      if (unlikely(!ifm->fixed))
+        /*
+          it mean that clause where was FT function was removed, so we have
+          to remove the function from the list.
+        */
+        li.remove();
+      else
+#endif
+        ifm->init_search(no_order);
+
   }
   return 0;
 }