LSAN: Memory leak after XA transaction with shutdown / rollback to savepoint

--source include/have_innodb.inc

CREATE TABLE t (a TEXT) ENGINE = InnoDB;

XA BEGIN 'a';

  INSERT INTO t VALUES (REPEAT('a', 20000));

  SAVEPOINT sp;

  INSERT INTO t VALUES (REPEAT('a', 20000));

  ROLLBACK TO sp;

XA END 'a';

XA PREPARE 'a';

=================================================================

==30164==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 64 byte(s) in 1 object(s) allocated from:

    #0 0x7fe00701ab40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)

    #1 0x55ea93a57cb2 in ut_allocator<unsigned char, true>::allocate(unsigned long, unsigned char const*, unsigned int, bool, bool) /10.5/storage/innobase/include/ut0new.h:374

    #2 0x55ea93f097b6 in trx_savepoint_for_mysql(trx_t*, char const*, long) /10.5/storage/innobase/trx/trx0roll.cc:532

    #3 0x55ea939f05e2 in innobase_savepoint /10.5/storage/innobase/handler/ha_innodb.cc:4776

    #4 0x55ea92f0917f in ha_savepoint(THD*, st_savepoint*) /10.5/sql/handler.cc:2558

    #5 0x55ea92b8f31f in trans_savepoint(THD*, st_mysql_const_lex_string) /10.5/sql/transaction.cc:617

    #6 0x55ea9273bf9b in mysql_execute_command(THD*) /10.5/sql/sql_parse.cc:5653

    #7 0x55ea9274b87a in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /10.5/sql/sql_parse.cc:7987

    #8 0x55ea9272236b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /10.5/sql/sql_parse.cc:1866

    #9 0x55ea9271ebe9 in do_command(THD*) /10.5/sql/sql_parse.cc:1347

    #10 0x55ea92b4cfc2 in do_handle_one_connection(CONNECT*, bool) /10.5/sql/sql_connect.cc:1411

    #11 0x55ea92b4c91b in handle_one_connection /10.5/sql/sql_connect.cc:1313

    #12 0x55ea938110e4 in pfs_spawn_thread /10.5/storage/perfschema/pfs.cc:2201

    #13 0x7fe0054406da in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x76da)

Indirect leak of 35 byte(s) in 1 object(s) allocated from:

    #0 0x7fe00701ab40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)

    #1 0x55ea93a57cb2 in ut_allocator<unsigned char, true>::allocate(unsigned long, unsigned char const*, unsigned int, bool, bool) /10.5/storage/innobase/include/ut0new.h:374

    #2 0x55ea93f05d3e in mem_strdup /10.5/storage/innobase/include/mem0mem.ic:450

    #3 0x55ea93f097f1 in trx_savepoint_for_mysql(trx_t*, char const*, long) /10.5/storage/innobase/trx/trx0roll.cc:535

    #4 0x55ea939f05e2 in innobase_savepoint /10.5/storage/innobase/handler/ha_innodb.cc:4776

    #5 0x55ea92f0917f in ha_savepoint(THD*, st_savepoint*) /10.5/sql/handler.cc:2558

    #6 0x55ea92b8f31f in trans_savepoint(THD*, st_mysql_const_lex_string) /10.5/sql/transaction.cc:617

    #7 0x55ea9273bf9b in mysql_execute_command(THD*) /10.5/sql/sql_parse.cc:5653

    #8 0x55ea9274b87a in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /10.5/sql/sql_parse.cc:7987

    #9 0x55ea9272236b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /10.5/sql/sql_parse.cc:1866

    #10 0x55ea9271ebe9 in do_command(THD*) /10.5/sql/sql_parse.cc:1347

    #11 0x55ea92b4cfc2 in do_handle_one_connection(CONNECT*, bool) /10.5/sql/sql_connect.cc:1411

    #12 0x55ea92b4c91b in handle_one_connection /10.5/sql/sql_connect.cc:1313

    #13 0x55ea938110e4 in pfs_spawn_thread /10.5/storage/perfschema/pfs.cc:2201

    #14 0x7fe0054406da in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x76da)

SUMMARY: AddressSanitizer: 99 byte(s) leaked in 2 allocation(s).