BUG#22562 - REPAIR TABLE .. USE_FRM causes server crash on Windows and server

            hangs on Linux

If REPAIR TABLE ... USE_FRM is issued for table that is located in different
than default database server crash could happen.

In reopen_name_locked_table take database name from table_list (user specified
or default database) instead of from thd (default database).

Affects 4.1 only.

mysql-test/r/repair.result

@@ -48,3 +48,10 @@ Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_par
 t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE	
 SET myisam_repair_threads=@@global.myisam_repair_threads;
 DROP TABLE t1;
+CREATE TABLE t1(a INT);
+USE mysql;
+REPAIR TABLE test.t1 USE_FRM;
+Table	Op	Msg_type	Msg_text
+test.t1	repair	status	OK
+USE test;
+DROP TABLE t1;

mysql-test/t/repair.test

@@ -45,4 +45,14 @@ SHOW INDEX FROM t1;
 SET myisam_repair_threads=@@global.myisam_repair_threads;
 DROP TABLE t1;
 
+#
+# BUG#22562 - REPAIR TABLE .. USE_FRM causes server crash on Windows and
+#             server hangs on Linux
+#
+CREATE TABLE t1(a INT);
+USE mysql;
+REPAIR TABLE test.t1 USE_FRM;
+USE test;
+DROP TABLE t1;
+
 # End of 4.1 tests

sql/sql_base.cc

@@ -821,7 +821,7 @@ TABLE *reopen_name_locked_table(THD* thd, TABLE_LIST* table_list)
   if (!(table = table_list->table))
     DBUG_RETURN(0);
 
-  char* db = thd->db ? thd->db : table_list->db;
+  char *db= table_list->db;
   char* table_name = table_list->real_name;
   char	key[MAX_DBKEY_LENGTH];
   uint	key_length;