binlog.binlog_truncate_multi_engine failed in bb with Lost connection to server during query

binlog.binlog_truncate_multi_engine 'innodb,row' w4 [ fail ]

        Test ended at 2022-06-06 16:16:56

CURRENT_TEST: binlog.binlog_truncate_multi_engine

mysqltest: In included file "/usr/share/mysql-test/suite/binlog/t/binlog_truncate_multi_engine.inc": 

included from /usr/share/mysql-test/suite/binlog/t/binlog_truncate_multi_engine.test at line 47:

At line 42: query 'if (`SELECT $case = "B"`)

{' failed: <Unknown> (2013): Lost connection to server during query

The result from queries just before the failure was:

< snip >

#

# Case "B" : "one engine has committed its transaction branch"

#

RESET MASTER;

FLUSH LOGS;

SET GLOBAL max_binlog_size= 4096;

connect con1,localhost,root,,;

List of binary logs before rotation

show binary logs;

Log_name	File_size

master-bin.000001	#

master-bin.000002	#

INSERT INTO t1 VALUES (1, REPEAT("x", 1));

INSERT INTO t2 VALUES (1, REPEAT("x", 1));

SET GLOBAL debug_dbug="d,enable_log_write_upto_crash";

BEGIN;

INSERT INTO t2 VALUES (2, REPEAT("x", 4100));

INSERT INTO t1 VALUES (2, REPEAT("x", 4100));

COMMIT;

connection default;