MDEV-21690 LeakSanitizer: detected memory leaks in mem_heap_create_block_func

mysql-test/suite/innodb/r/foreign_key.result

@@ -565,4 +565,11 @@ t2	CREATE TABLE `t2` (
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1
 drop tables t2, t1;
 set default_storage_engine= default;
+#
+# MDEV-21690 LeakSanitizer: detected memory leaks in mem_heap_create_block_func
+#
+CREATE TABLE t1 (a TEXT, b TEXT) ENGINE=InnoDB;
+ALTER TABLE t1 ADD FOREIGN KEY (a) REFERENCES t1 (b);
+ERROR HY000: Can't create table `test`.`t1` (errno: 150 "Foreign key constraint is incorrectly formed")
+DROP TABLE t1;
 # End of 10.5 tests

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

@@ -519,6 +519,16 @@ drop tables t2, t1;
 
 set default_storage_engine= default;
 
+--echo #
+--echo # MDEV-21690 LeakSanitizer: detected memory leaks in mem_heap_create_block_func
+--echo #
+CREATE TABLE t1 (a TEXT, b TEXT) ENGINE=InnoDB;
+--error ER_CANT_CREATE_TABLE
+ALTER TABLE t1 ADD FOREIGN KEY (a) REFERENCES t1 (b);
+
+# Cleanup
+DROP TABLE t1;
+
 --echo # End of 10.5 tests
 
 --source include/wait_until_count_sessions.inc

storage/innobase/handler/ha_innodb.cc

@@ -12339,7 +12339,7 @@ create_table_info_t::create_foreign_keys()
 					" failed. Column %s was not found.",
 					operation, create_name, k.str(),
 					column_names[i]);
-
+				dict_foreign_free(foreign);
 				return (DB_CANNOT_ADD_CONSTRAINT);
 			}
 			++i;
@@ -12353,6 +12353,7 @@ create_table_info_t::create_foreign_keys()
 					"allowed).",
 					operation, create_name, k.str(), i,
 					MAX_COLS_PER_FK);
+				dict_foreign_free(foreign);
 				return (DB_CANNOT_ADD_CONSTRAINT);
 			}
 		}
@@ -12367,6 +12368,7 @@ create_table_info_t::create_foreign_keys()
 						 k.str(), column_names,
 						 index_error, err_col,
 						 err_index, table);
+			dict_foreign_free(foreign);
 			return (DB_CANNOT_ADD_CONSTRAINT);
 		}