sys_vars.innodb_fatal_semaphore_wait_threshold failed in buildbot with "Server failed to dissapear"

sys_vars.innodb_fatal_semaphore_wait_threshold 'innodb' w3 [ fail ]

        Test ended at 2020-06-18 10:30:35

CURRENT_TEST: sys_vars.innodb_fatal_semaphore_wait_threshold

mysqltest: At line 95: Server failed to dissapear

The result from queries just before the failure was:

< snip >

create table t1 (id integer, x integer) engine = InnoDB;

insert into t1 values(0, 0);

set DEBUG_DBUG='+d,fatal-semaphore-timeout';

set autocommit=0;

# Sending query on con1,

# the session will hold lock table mutex and sleep

SELECT * from t1 where id = 0 FOR UPDATE;

connection con2;

set autocommit=0;

# Sending query on con2,

# the session will be blocked on the lock table mutex and

# thus be put into sync arry

SELECT * from t1 where id = 0 FOR UPDATE;

connection default;

# Waitting for mysqld to crash