Bug #56947 InnoDB leaks memory when failing to create a table

row_create_table_for_mysql(): When the table creation fails,
free the dict_table_t object.

mysql-test/suite/innodb_plugin/r/innodb_bug56947.result

+create table bug56947(a int not null) engine = innodb;
+CREATE TABLE `bug56947#1`(a int) ENGINE=InnoDB;
+alter table bug56947 add unique index (a);
+ERROR HY000: Table 'test.bug56947#1' already exists
+drop table `bug56947#1`;
+drop table bug56947;

mysql-test/suite/innodb_plugin/t/innodb_bug56947.test

+#
+# Bug #56947 valgrind reports a memory leak in innodb-plugin.innodb-index
+#
+-- source include/have_innodb_plugin.inc
+
+create table bug56947(a int not null) engine = innodb;
+CREATE TABLE `bug56947#1`(a int) ENGINE=InnoDB;
+--error 156
+alter table bug56947 add unique index (a);
+drop table `bug56947#1`;
+drop table bug56947;

storage/innodb_plugin/ChangeLog

+2010-10-11	The InnoDB Team
+
+	* row/row0mysql.c, innodb_bug56947.result, innodb_bug56947.test:
+	Fix Bug #56947 InnoDB leaks memory when failing to create a table
+
 2010-10-06	The InnoDB Team
+
 	* row/row0mysql.c, innodb_bug57255.result, innodb_bug57255.test
-	Fix Bug #Cascade Delete results in "Got error -1 from storage engine"
- 
+	Fix Bug #57255 Cascade Delete results in "Got error -1 from
+	storage engine"
+
 2010-09-27	The InnoDB Team
 
 	* row/row0sel.c, innodb_bug56716.result, innodb_bug56716.test:
 	Fix Bug #56716 InnoDB locks a record gap without locking the table
 
 2010-09-06	The InnoDB Team
+
 	* dict/dict0load.c, innodb_bug53756.test innodb_bug53756.result
 	Fix Bug #53756 	ALTER TABLE ADD PRIMARY KEY affects crash recovery
 
@@ -40,7 +48,6 @@
 	* handler/ha_innodb.cc
 	Fix Bug #55382 Assignment with SELECT expressions takes unexpected
 	S locks in READ COMMITTED
->>>>>>> MERGE-SOURCE
 
 2010-07-27	The InnoDB Team
 

storage/innodb_plugin/row/row0mysql.c

@@ -1879,15 +1879,13 @@ err_exit:
 
 	err = trx->error_state;
 
-	if (UNIV_UNLIKELY(err != DB_SUCCESS)) {
+	switch (err) {
+	case DB_SUCCESS:
+		break;
+	case DB_OUT_OF_FILE_SPACE:
 		trx->error_state = DB_SUCCESS;
 		trx_general_rollback_for_mysql(trx, NULL);
-		/* TO DO: free table?  The code below will dereference
-		table->name, though. */
-	}
 
-	switch (err) {
-	case DB_OUT_OF_FILE_SPACE:
 		ut_print_timestamp(stderr);
 		fputs("  InnoDB: Warning: cannot create table ",
 		      stderr);
@@ -1902,9 +1900,13 @@ err_exit:
 		break;
 
 	case DB_DUPLICATE_KEY:
+	default:
 		/* We may also get err == DB_ERROR if the .ibd file for the
 		table already exists */
 
+		trx->error_state = DB_SUCCESS;
+		trx_general_rollback_for_mysql(trx, NULL);
+		dict_mem_table_free(table);
 		break;
 	}