MDEV-17432 Assertion `lock_trx_has_sys_table_locks(trx) == 0' failed …

…upon ALTER TABLE .. ADD FOREIGN KEY

- This is a regression of commit b26e603. While dropping
the incompletely created table, InnoDB shouldn't consider that operation as non-atomic one.

mysql-test/suite/innodb/t/table_flags.test

@@ -207,3 +207,9 @@ DROP TABLE tr,tc,td,tz,tp;
 --list_files $bugdir
 --remove_files_wildcard $bugdir
 --rmdir $bugdir
+
+call mtr.add_suppression("ERROR HY000: Can't create table `test`.`t1`");
+--error ER_CANT_CREATE_TABLE
+CREATE TABLE t1(f1 INT, f2 VARCHAR(1), KEY k1(f2),
+		FULLTEXT KEY(f2),
+		FOREIGN KEY (f2) REFERENCES t1(f3))ENGINE=InnoDB;

storage/innobase/handler/ha_innodb.cc

@@ -12865,7 +12865,8 @@ ha_innobase::create(
 		if (info.drop_before_rollback()) {
 			trx->error_state = DB_SUCCESS;
 			row_drop_table_for_mysql(info.table_name(),
-						 trx, SQLCOM_TRUNCATE, true);
+						 trx, SQLCOM_TRUNCATE, true,
+						 false);
 		}
 		trx_rollback_for_mysql(trx);
 		row_mysql_unlock_data_dictionary(trx);