MDEV-22283 Server crashes in key_copy or unexpected error 156

(The table already existed in the storage engine)

Wrong algorithm of closing partitions on error doesn't close last
partition.

mysql-test/suite/versioning/r/partition.result

@@ -658,6 +658,23 @@ pk	f
 update t1 set f=pk;
 delete from t1;
 drop table t1;
-# Test cleanup
-drop database test;
-create database test;
+#
+# MDEV-22283 Server crashes in key_copy or unexpected error 156: The table already existed in the storage engine
+#
+create table t1 (a int primary key) engine=aria page_checksum=0
+with system versioning
+partition by system_time (partition p1 history, partition pn current);
+alter table t1 add partition (partition p2 history);
+Warnings:
+Warning	4115	Maybe missing parameters: no rotation condition for multiple HISTORY partitions.
+show table status;
+Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment	Max_index_length	Temporary
+t1	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Got error 174 "Fatal error during initialization of handler" from storage engine Aria	NULL	NULL
+Warnings:
+Warning	1030	Got error 174 "Fatal error during initialization of handler" from storage engine Aria
+drop table t1;
+create table t1 (b int) engine=aria row_format=dynamic with system versioning
+partition by system_time (partition p1 history, partition pn current);
+insert into t1 values (1);
+replace into t1 values (1);
+drop table t1;

mysql-test/suite/versioning/t/partition.test

@@ -574,7 +574,6 @@ update t1 left join t2 on a > b set b= 2 order by b;
 # cleanup
 drop table t1, t2;
 
---source suite/versioning/common_finish.inc
 --echo #
 --echo # MDEV-17091 Assertion `old_part_id == m_last_part' failed in
 --echo # ha_partition::update_row or `part_id == m_last_part' in
@@ -596,6 +595,23 @@ update t1 set f=pk;
 delete from t1;
 drop table t1;
 
---echo # Test cleanup
-drop database test;
-create database test;
+--echo #
+--echo # MDEV-22283 Server crashes in key_copy or unexpected error 156: The table already existed in the storage engine
+--echo #
+create table t1 (a int primary key) engine=aria page_checksum=0
+with system versioning
+partition by system_time (partition p1 history, partition pn current);
+
+alter table t1 add partition (partition p2 history);
+show table status;
+drop table t1;
+
+create table t1 (b int) engine=aria row_format=dynamic with system versioning
+partition by system_time (partition p1 history, partition pn current);
+insert into t1 values (1);
+replace into t1 values (1);
+
+# cleanup
+drop table t1;
+
+--source suite/versioning/common_finish.inc

sql/ha_partition.cc

@@ -3657,11 +3657,13 @@ int ha_partition::open(const char *name, int mode, uint test_if_locked)
 
 err_handler:
   DEBUG_SYNC(ha_thd(), "partition_open_error");
-  file= &m_file[m_tot_parts - 1];
-  while (file-- != m_file)
+  DBUG_ASSERT(m_tot_parts > 0);
+  for (uint i= m_tot_parts - 1; ; --i)
   {
-    if (bitmap_is_set(&m_opened_partitions, (uint)(file - m_file)))
-      (*file)->ha_close();
+    if (bitmap_is_set(&m_opened_partitions, i))
+      m_file[i]->ha_close();
+    if (!i)
+      break;
   }
 err_alloc:
   free_partition_bitmaps();