CURRENT_TEST: rpl.rpl_gtid_index
mysqltest: In included file "./suite/rpl/include/rpl_gtid_index.inc": 
included from /home/buildbot/amd64-msan-clang-20/build/mysql-test/suite/rpl/t/rpl_gtid_index.test at line 47:
At line 124: query 'let $_slave_check_configured= query_get_value("SHOW SLAVE STATUS", Slave_IO_Running, 1)' failed: <Unknown> (2013): Lost connection to server during query

The result from queries just before the failure was:
< snip >
include/stop_slave.inc
connection master;
SET @orig_domain_id= @@gtid_domain_id;
SET @orig_server_id= @@server_id;
SET gtid_domain_id= @orig_domain_id;
SET server_id= @orig_server_id;
SELECT COUNT(*) FROM gtid_data;
COUNT(*)
200
*** The result should be empty, otherwise some result is wrong:
SELECT idx, gtid_pos, BINLOG_GTID_POS(file, pos)
FROM gtid_data
WHERE NOT gtid_eq(CONVERT(gtid_pos USING utf8),BINLOG_GTID_POS(file, pos)) 
ORDER BY idx;
idx	gtid_pos	BINLOG_GTID_POS(file, pos)
connection slave;
SET @orig_pos= @@GLOBAL.gtid_slave_pos;
SET @orig_t1_limit= (SELECT MAX(a) FROM t1);
*** Now connect the slave to each position in turn, and test that
*** the right amount of data is replicated at each point.

More results from queries before failure can be found in /home/buildbot/amd64-msan-clang-20/build/mysql-test/var/14/log/rpl_gtid_index.log


Server [mysqld.2 - pid: 46085, winpid: 46085, exit: 256] failed during test run
Server log from this test:
==46103==WARNING: MemorySanitizer: use-of-uninitialized-value
  Uninitialized value was created by a heap deallocation
    #0 0x55ff27d34450 in free (/home/buildbot/amd64-msan-clang-20/build/sql/mariadbd+0x920450) (BuildId: d88a2c32f69404e3ab1ae047c3f12232696b7ede)
    #1 0x55ff28001f05 in ilink::operator delete(void*, unsigned long) /home/buildbot/amd64-msan-clang-20/build/sql/sql_list.h:681:6
    #2 0x55ff28001f05 in THD::~THD() /home/buildbot/amd64-msan-clang-20/build/sql/sql_class.cc:1867:1
    #3 0x55ff27ec5a59 in handle_slave_sql /home/buildbot/amd64-msan-clang-20/build/sql/slave.cc:5735:3
    #4 0x55ff29261de4 in pfs_spawn_thread /home/buildbot/amd64-msan-clang-20/build/storage/perfschema/pfs.cc:2198:3
    #5 0x7f798bcab1f4  (/lib/x86_64-linux-gnu/libc.so.6+0x891f4) (BuildId: 93ac61ec5a8eb1396f9fbd350e3169a558528a40)


 - found 'core' (0/5)
Core generated by '/home/buildbot/amd64-msan-clang-20/build/sql/mariadbd'
Output from gdb follows. The first stack trace is from the failing thread.
The following stack traces are from all threads (so the failing one is
duplicated).
--------------------------

#8  0x000055ff27d1642e in __sanitizer::Die() ()
#9  0x000055ff27d2d713 in __msan_warning_with_origin_noreturn ()
#10 0x000055ff27eccf91 in store_string_or_null (field=<optimized out>, str=0x55ff29f140e9 "Slave SQL thread ending") at /home/buildbot/amd64-msan-clang-20/build/sql/slave.cc:2884
#11 store_master_info (thd=thd@entry=0x72c0001e0020, mi=mi@entry=0x72a00002a000, table=table@entry=0x72700001c040, gtid_pos=gtid_pos@entry=0x7f797b72cf18) at /home/buildbot/amd64-msan-clang-20/build/sql/slave.cc:2949
#12 0x000055ff28380b96 in fill_slave_status (thd=<optimized out>, tables=<optimized out>, cond=<optimized out>) at /home/buildbot/amd64-msan-clang-20/build/sql/sql_show.cc:9198