Logging: ./mtr  MDEV-26520
vardir: /data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var
Checking leftover processes...
Removing old var directory...
Creating var directory '/data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var'...
Checking supported features...
MariaDB Version 10.7.0-MariaDB-debug
 - SSL connections supported
 - binaries are debug compiled
 - binaries built with wsrep patch
Collecting tests...
Installing system database...

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

TEST                                      RESULT   TIME (ms) or COMMENT
--------------------------------------------------------------------------

worker[1] Using MTR_BUILD_THREAD 300, with reserved ports 16000..16019
main.MDEV-26520 'innodb'                 [ fail ]
        Test ended at 2021-09-14 13:59:55

CURRENT_TEST: main.MDEV-26520
mysqltest: At line 13: query 'SET GLOBAL innodb_purge_threads = $val' failed: <Unknown> (2013): Lost connection to server during query

The result from queries just before the failure was:
< snip >
SELECT @@innodb_purge_threads = 1 AS expect_1;
expect_1
1
# Trying value 2
SET GLOBAL innodb_purge_threads = 2;
SELECT @@innodb_purge_threads = 2 AS expect_1;
expect_1
1
# Trying value 3
SET GLOBAL innodb_purge_threads = 3;
SELECT @@innodb_purge_threads = 3 AS expect_1;
expect_1
1
# Trying value 4
SET GLOBAL innodb_purge_threads = 4;
SELECT @@innodb_purge_threads = 4 AS expect_1;
expect_1
1
# Trying value 5
SET GLOBAL innodb_purge_threads = 5;

More results from queries before failure can be found in /data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/log/MDEV-26520.log


Server [mysqld.1 - pid: 1378186, winpid: 1378186, exit: 256] failed during test run
Server log from this test:
----------SERVER LOG START-----------
$ /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd --defaults-group-suffix=.1 --defaults-file=/data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/my.cnf --log-output=file --innodb --innodb-cmpmem --innodb-cmp-per-index --innodb-trx --innodb-locks --innodb-lock-waits --innodb-metrics --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --innodb-sys-columns --innodb-sys-fields --innodb-sys-foreign --innodb-sys-foreign-cols --innodb-sys-indexes --innodb-sys-tables --innodb-sys-virtual --core-file --loose-debug-sync-timeout=300
2021-09-14 13:59:54 0 [Note] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd (server 10.7.0-MariaDB-debug-log) starting as process 1378187 ...
2021-09-14 13:59:54 0 [Warning] Could not increase number of max_open_files to more than 1024 (request: 32286)
2021-09-14 13:59:54 0 [Warning] Changed limits: max_open_files: 1024  max_connections: 151 (was 151)  table_cache: 421 (was 2000)
2021-09-14 13:59:54 0 [Note] InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!!
2021-09-14 13:59:54 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-09-14 13:59:54 0 [Note] InnoDB: Number of pools: 1
2021-09-14 13:59:54 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
2021-09-14 13:59:54 0 [Note] mariadbd: O_TMPFILE is not supported on /data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/tmp/mysqld.1 (disabling future attempts)
2021-09-14 13:59:54 0 [Note] InnoDB: Using liburing
2021-09-14 13:59:54 0 [Note] InnoDB: Initializing buffer pool, total size = 8388608, chunk size = 8388608
2021-09-14 13:59:54 0 [Note] InnoDB: Completed initialization of buffer pool
2021-09-14 13:59:54 0 [Note] InnoDB: 128 rollback segments are active.
2021-09-14 13:59:54 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2021-09-14 13:59:54 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2021-09-14 13:59:54 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2021-09-14 13:59:54 0 [Note] InnoDB: 10.7.0 started; log sequence number 44288; transaction id 17
2021-09-14 13:59:54 0 [Note] InnoDB: Loading buffer pool(s) from /data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/mysqld.1/data/ib_buffer_pool
2021-09-14 13:59:54 0 [Note] Plugin 'partition' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'SEQUENCE' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_FT_CONFIG' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_SYS_TABLESTATS' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_FT_DELETED' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_CMP' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'THREAD_POOL_WAITS' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_CMP_RESET' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'THREAD_POOL_QUEUES' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'FEEDBACK' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_FT_INDEX_TABLE' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'THREAD_POOL_GROUPS' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_CMP_PER_INDEX_RESET' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_FT_INDEX_CACHE' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_FT_BEING_DELETED' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_CMPMEM_RESET' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_FT_DEFAULT_STOPWORD' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_SYS_TABLESPACES' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'user_variables' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'INNODB_TABLESPACES_ENCRYPTION' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'THREAD_POOL_STATS' is disabled.
2021-09-14 13:59:54 0 [Note] Plugin 'unix_socket' is disabled.
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown option '--loose-pam-debug'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown option '--loose-enable-performance-schema'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-accounts-size=100'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-digests-size=200'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-hosts-size=100'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-users-size=100'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-mutex-instances=5000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-rwlock-instances=5000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-cond-instances=1000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-file-instances=10000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-socket-instances=1000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-table-instances=500'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-table-lock-stat=500'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-index-stat=5000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-table-handles=1000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-prepared-statements-instances=100'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-program-instances=5000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-setup-actors-size=100'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-setup-objects-size=100'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-waits-history-size=10'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-waits-history-long-size=10000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-stages-history-size=10'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-stages-history-long-size=1000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-statements-history-size=10'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-statements-history-long-size=1000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-transactions-history-size=10'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-events-transactions-history-long-size=1000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-thread-instances=200'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-session-connect-attrs-size=2048'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-max-metadata-locks=10000'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-instrument=%=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-stages-current=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-stages-history=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-stages-history-long=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-statements-current=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-statements-history=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-statements-history-long=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-transactions-current=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-transactions-history=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-transactions-history-long=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-waits-current=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-waits-history=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-events-waits-history-long=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-global-instrumentation=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown variable 'loose-performance-schema-consumer-thread-instrumentation=ON'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown option '--loose-aria'
2021-09-14 13:59:54 0 [Warning] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: unknown option '--loose-enable-performance-schema'
2021-09-14 13:59:54 0 [Note] InnoDB: Buffer pool(s) load completed at 210914 13:59:54
2021-09-14 13:59:54 0 [Note] Server socket created on IP: '127.0.0.1'.
2021-09-14 13:59:54 0 [Note] /data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd: ready for connections.
Version: '10.7.0-MariaDB-debug-log'  socket: '/data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/tmp/mysqld.1.sock'  port: 16000  Source distribution
safe_mutex: Trying to lock mutex at /data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc, line 1245, when the mutex was already locked at /data/Server/bb-10.7-MDEV-26520/sql/sys_vars_shared.h, line 56 in thread T@29
210914 13:59:54 [ERROR] mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed, 
something is definitely wrong and this may fail.

Server version: 10.7.0-MariaDB-debug-log
key_buffer_size=1048576
read_buffer_size=131072
max_used_connections=1
max_threads=153
thread_count=2
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 63781 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x62b0000a8218
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x0 thread_stack 0x100000
??:0(__interceptor_tcgetattr)[0x7faec1d82d30]
mysys/stacktrace.c:212(my_print_stacktrace)[0x55de8fe574f9]
sql/signal_handler.cc:226(handle_fatal_signal)[0x55de8ec718a3]
sigaction.c:0(__restore_rt)[0x7faec1bca3c0]
??:0(gsignal)[0x7faec16b618b]
??:0(abort)[0x7faec1695859]
mysys/thr_mutex.c:265(safe_mutex_lock)[0x55de8fe616fa]
psi/mysql_thread.h:754(inline_mysql_mutex_lock)[0x55de8e34f142]
sql/sql_class.cc:1246(THD::init())[0x55de8e358add]
sql/sql_class.cc:850(THD::THD(unsigned long long, bool))[0x55de8e356018]
sql/sql_class.cc:4915(create_background_thd())[0x55de8e37336e]
handler/ha_innodb.cc:1794(innobase_create_background_thd(char const*))[0x55de8f4a0791]
srv/srv0srv.cc:1810(purge_create_background_thds(int))[0x55de8f909488]
srv/srv0srv.cc:1708(srv_update_purge_thread_count(unsigned int))[0x55de8f908d9d]
handler/ha_innodb.cc:18751(innodb_purge_threads_update(THD*, st_mysql_sys_var*, void*, void const*))[0x55de8f4f47bb]
sql/sql_plugin.cc:3623(sys_var_pluginvar::global_update(THD*, set_var*))[0x55de8e4f7942]
sql/set_var.cc:207(sys_var::update(THD*, set_var*))[0x55de8e20aad8]
sql/set_var.cc:863(set_var::update(THD*))[0x55de8e20f494]
sql/set_var.cc:745(sql_set_variables(THD*, List<set_var_base>*, bool))[0x55de8e20e900]
sql/sql_parse.cc:5036(mysql_execute_command(THD*, bool))[0x55de8e48c94e]
sql/sql_parse.cc:8036(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x55de8e49f8de]
sql/sql_parse.cc:1898(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool))[0x55de8e477ac5]
sql/sql_parse.cc:1404(do_command(THD*, bool))[0x55de8e474e9d]
sql/sql_connect.cc:1418(do_handle_one_connection(CONNECT*, bool))[0x55de8e89fd4d]
sql/sql_connect.cc:1314(handle_one_connection)[0x55de8e89f5de]
nptl/pthread_create.c:478(start_thread)[0x7faec1bbe609]
??:0(clone)[0x7faec1792293]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x0): (null)
Connection ID (thread ID): 0
Status: NOT_KILLED

Optimizer switch: index_merge=off,index_merge_union=off,index_merge_sort_union=off,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=off,join_cache_hashed=off,join_cache_bka=off,optimize_join_buffer_size=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off,condition_pushdown_for_subquery=off,rowid_filter=off,condition_pushdown_from_having=off,not_null_range_scan=off

The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
information that should help you find out what is causing the crash.

We think the query pointer is invalid, but we will try to print it anyway. 
Query: 

Writing a core file...
Working directory at /data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/mysqld.1/data
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        unlimited            unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             1546116              1546116              processes 
Max open files            1024                 1024                 files     
Max locked memory         67108864             67108864             bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       1546116              1546116              signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us        
Core pattern: |/usr/share/apport/apport %p %s %c %d %P %E

----------SERVER LOG END-------------


 - found 'core' (0/5)

Trying 'dbx' to get a backtrace

Trying 'gdb' to get a backtrace from coredump /data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/log/main.MDEV-26520-innodb/mysqld.1/data/core
Core generated by '/data/Server_bin/bb-10.7-MDEV-26520_asan/bin/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).
--------------------------
[New LWP 1378212]
[New LWP 1378194]
[New LWP 1378195]
[New LWP 1378191]
[New LWP 1378190]
[New LWP 1378193]
[New LWP 1378189]
[New LWP 1378196]
[New LWP 1378197]
[New LWP 1378188]
[New LWP 1378192]
[New LWP 1378187]
[New LWP 1378198]
[New LWP 1378202]
[New LWP 1378199]
[New LWP 1378201]
[New LWP 1378206]
[New LWP 1378204]
[New LWP 1378205]
[New LWP 1378200]
[New LWP 1378203]
[New LWP 1378207]
[New LWP 1378208]
[New LWP 1378209]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/data/Server_bin/bb-10.7-MDEV-26520_asan/bin/mariadbd --defaults-group-suffix=.'.
Program terminated with signal SIGABRT, Aborted.
#0  __pthread_kill (threadid=<optimized out>, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56
56	../sysdeps/unix/sysv/linux/pthread_kill.c: No such file or directory.
[Current thread is 1 (Thread 0x7faeb10cb700 (LWP 1378212))]
#0  __pthread_kill (threadid=<optimized out>, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56
#1  0x000055de8fe5767b in my_write_core (sig=6) at /data/Server/bb-10.7-MDEV-26520/mysys/stacktrace.c:424
#2  0x000055de8ec71de3 in handle_fatal_signal (sig=6) at /data/Server/bb-10.7-MDEV-26520/sql/signal_handler.cc:345
#3  <signal handler called>
#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#5  0x00007faec1695859 in __GI_abort () at abort.c:79
#6  0x000055de8fe616fa in safe_mutex_lock (mp=0x55de9209c900 <LOCK_global_system_variables>, my_flags=0, file=0x55de903392a0 "/data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc", line=1245) at /data/Server/bb-10.7-MDEV-26520/mysys/thr_mutex.c:262
#7  0x000055de8e34f142 in inline_mysql_mutex_lock (that=0x55de9209c900 <LOCK_global_system_variables>, src_file=0x55de903392a0 "/data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc", src_line=1245) at /data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h:750
#8  0x000055de8e358add in THD::init (this=0x62b0000a8218) at /data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc:1245
#9  0x000055de8e356018 in THD::THD (this=0x62b0000a8218, id=0, is_wsrep_applier=false) at /data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc:849
#10 0x000055de8e37336e in create_background_thd () at /data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc:4915
#11 0x000055de8f4a0791 in innobase_create_background_thd (name=0x55de90cfa300 "InnoDB purge worker") at /data/Server/bb-10.7-MDEV-26520/storage/innobase/handler/ha_innodb.cc:1794
#12 0x000055de8f909488 in purge_create_background_thds (n=5) at /data/Server/bb-10.7-MDEV-26520/storage/innobase/srv/srv0srv.cc:1810
#13 0x000055de8f908d9d in srv_update_purge_thread_count (n=5) at /data/Server/bb-10.7-MDEV-26520/storage/innobase/srv/srv0srv.cc:1707
#14 0x000055de8f4f47bb in innodb_purge_threads_update (save=0x62900004b3d8) at /data/Server/bb-10.7-MDEV-26520/storage/innobase/handler/ha_innodb.cc:18750
#15 0x000055de8e4f7942 in sys_var_pluginvar::global_update (this=0x625000009698, thd=0x62b0000af218, var=0x62900004b3b8) at /data/Server/bb-10.7-MDEV-26520/sql/sql_plugin.cc:3622
#16 0x000055de8e20aad8 in sys_var::update (this=0x625000009698, thd=0x62b0000af218, var=0x62900004b3b8) at /data/Server/bb-10.7-MDEV-26520/sql/set_var.cc:207
#17 0x000055de8e20f494 in set_var::update (this=0x62900004b3b8, thd=0x62b0000af218) at /data/Server/bb-10.7-MDEV-26520/sql/set_var.cc:863
#18 0x000055de8e20e900 in sql_set_variables (thd=0x62b0000af218, var_list=0x62b0000b4288, free=true) at /data/Server/bb-10.7-MDEV-26520/sql/set_var.cc:745
#19 0x000055de8e48c94e in mysql_execute_command (thd=0x62b0000af218, is_called_from_prepared_stmt=false) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:5036
#20 0x000055de8e49f8de in mysql_parse (thd=0x62b0000af218, rawbuf=0x62900004b238 "SET GLOBAL innodb_purge_threads = 5", length=35, parser_state=0x7faeb10c9b20) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:8036
#21 0x000055de8e477ac5 in dispatch_command (command=COM_QUERY, thd=0x62b0000af218, packet=0x62900025d219 "SET GLOBAL innodb_purge_threads = 5", packet_length=35, blocking=true) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:1896
#22 0x000055de8e474e9d in do_command (thd=0x62b0000af218, blocking=true) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:1404
#23 0x000055de8e89fd4d in do_handle_one_connection (connect=0x608000003cb8, put_in_cache=true) at /data/Server/bb-10.7-MDEV-26520/sql/sql_connect.cc:1418
#24 0x000055de8e89f5de in handle_one_connection (arg=0x608000003c38) at /data/Server/bb-10.7-MDEV-26520/sql/sql_connect.cc:1312
#25 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#26 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7faeb11f3700 (LWP 1378209)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55de920aa988 <COND_manager+40>) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55de920aa8a8 <LOCK_manager+40>, cond=0x55de920aa960 <COND_manager>) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55de920aa960 <COND_manager>, mutex=0x55de920aa8a8 <LOCK_manager+40>) at pthread_cond_wait.c:638
#3  0x000055de8fe62dab in safe_cond_wait (cond=0x55de920aa960 <COND_manager>, mp=0x55de920aa880 <LOCK_manager>, file=0x55de90394f80 "/data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h", line=1072) at /data/Server/bb-10.7-MDEV-26520/mysys/thr_mutex.c:492
#4  0x000055de8e46d139 in inline_mysql_cond_wait (that=0x55de920aa960 <COND_manager>, mutex=0x55de920aa880 <LOCK_manager>, src_file=0x55de90397e80 "/data/Server/bb-10.7-MDEV-26520/sql/sql_manager.cc", src_line=103) at /data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h:1072
#5  0x000055de8e46d68a in handle_manager (arg=0x0) at /data/Server/bb-10.7-MDEV-26520/sql/sql_manager.cc:103
#6  0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7faeb133b700 (LWP 1378208)):
#0  0x00007faec16b7322 in __GI___sigtimedwait (set=0x7faeb133ad40, info=0x7faeb133abb0, timeout=0x0) at ../sysdeps/unix/sysv/linux/sigtimedwait.c:29
#1  0x00007faec1d9d111 in ?? () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x000055de8e126239 in my_sigwait (set=0x7faeb133ad40, sig=0x7faeb133acf0, code=0x7faeb133ad00) at /data/Server/bb-10.7-MDEV-26520/include/my_pthread.h:195
#3  0x000055de8e1304f9 in signal_hand (arg=0x0) at /data/Server/bb-10.7-MDEV-26520/sql/mysqld.cc:3134
#4  0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#5  0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7faeb1b52700 (LWP 1378207)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb1b51810, clockid=<optimized out>, expected=0, futex_word=0x63000001f62c) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb1b51810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f600) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f600, mutex=0x618000000590, abstime=0x7faeb1b51810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f600, __mutex=0x618000000590, __abs_timeout=0x7faeb1b51810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f600, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f600, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f600, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f600) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f600, t=0x7faeb1b51bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f600) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000022a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000022a0: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000022a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002298) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002298) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002290) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7faeb3bae700 (LWP 1378203)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb3bad810, clockid=<optimized out>, expected=0, futex_word=0x63000001f828) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb3bad810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f800) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f800, mutex=0x618000000590, abstime=0x7faeb3bad810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f800, __mutex=0x618000000590, __abs_timeout=0x7faeb3bad810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f800, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f800, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f800, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f800) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f800, t=0x7faeb3badbc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f800) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000021a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000021a0: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000021a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002198) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002198) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002190) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7faeb5403700 (LWP 1378200)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb5402810, clockid=<optimized out>, expected=0, futex_word=0x63000001f9a8) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb5402810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f980) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f980, mutex=0x618000000590, abstime=0x7faeb5402810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f980, __mutex=0x618000000590, __abs_timeout=0x7faeb5402810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f980, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f980, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f980, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f980) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f980, t=0x7faeb5402bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f980) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000020e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000020e0: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000020e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x6040000020d8) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x6040000020d8) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x6040000020d0) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7faeb2b80700 (LWP 1378205)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb2b7f810, clockid=<optimized out>, expected=0, futex_word=0x63000001f728) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb2b7f810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f700) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f700, mutex=0x618000000590, abstime=0x7faeb2b7f810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f700, __mutex=0x618000000590, __abs_timeout=0x7faeb2b7f810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f700, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f700, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f700, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f700) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f700, t=0x7faeb2b7fbc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f700) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002228: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002220: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002228: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002218) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002218) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002210) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7faeb3397700 (LWP 1378204)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb3396810, clockid=<optimized out>, expected=0, futex_word=0x63000001f7a8) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb3396810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f780) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f780, mutex=0x618000000590, abstime=0x7faeb3396810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f780, __mutex=0x618000000590, __abs_timeout=0x7faeb3396810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f780, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f780, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f780, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f780) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f780, t=0x7faeb3396bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f780) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000021e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000021e0: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000021e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x6040000021d8) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x6040000021d8) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x6040000021d0) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7faeb2369700 (LWP 1378206)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb2368810, clockid=<optimized out>, expected=0, futex_word=0x63000001f6a8) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb2368810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f680) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f680, mutex=0x618000000590, abstime=0x7faeb2368810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f680, __mutex=0x618000000590, __abs_timeout=0x7faeb2368810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f680, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f680, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f680, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f680) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f680, t=0x7faeb2368bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f680) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002268: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002260: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002268: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002258) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002258) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002250) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7faeb4bdc700 (LWP 1378201)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb4bdb810, clockid=<optimized out>, expected=0, futex_word=0x63000001f928) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb4bdb810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f900) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f900, mutex=0x618000000590, abstime=0x7faeb4bdb810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f900, __mutex=0x618000000590, __abs_timeout=0x7faeb4bdb810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f900, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f900, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f900, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f900) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f900, t=0x7faeb4bdbbc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f900) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002128: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002120: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002128: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002118) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002118) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002110) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7faeb5c1a700 (LWP 1378199)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb5c19810, clockid=<optimized out>, expected=0, futex_word=0x63000001fa28) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb5c19810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fa00) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fa00, mutex=0x618000000590, abstime=0x7faeb5c19810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fa00, __mutex=0x618000000590, __abs_timeout=0x7faeb5c19810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fa00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fa00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fa00, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fa00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fa00, t=0x7faeb5c19bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fa00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000040a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000040a0: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000040a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000004098) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000004098) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000004090) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7faeb43c5700 (LWP 1378202)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb43c4810, clockid=<optimized out>, expected=0, futex_word=0x63000001f8a8) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb43c4810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001f880) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001f880, mutex=0x618000000590, abstime=0x7faeb43c4810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001f880, __mutex=0x618000000590, __abs_timeout=0x7faeb43c4810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f880, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001f880, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001f880, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001f880) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001f880, t=0x7faeb43c4bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001f880) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002168: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002160: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002168: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002158) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002158) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002150) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7faeb6431700 (LWP 1378198)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb6430810, clockid=<optimized out>, expected=0, futex_word=0x63000001faa8) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb6430810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fa80) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fa80, mutex=0x618000000590, abstime=0x7faeb6430810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fa80, __mutex=0x618000000590, __abs_timeout=0x7faeb6430810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fa80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fa80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fa80, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fa80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fa80, t=0x7faeb6430bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fa80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000004068: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000004060: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000004068: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000004058) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000004058) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000004050) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7faec16621c0 (LWP 1378187)):
#0  0x00007faec1785aff in __GI___poll (fds=0x60e000002eb8, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007faec1d525ba in poll () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x000055de8e1395c7 in handle_connections_sockets () at /data/Server/bb-10.7-MDEV-26520/sql/mysqld.cc:6143
#3  0x000055de8e1383c3 in mysqld_main (argc=155, argv=0x61b0000015f8) at /data/Server/bb-10.7-MDEV-26520/sql/mysqld.cc:5848
#4  0x000055de8e12613d in main (argc=23, argv=0x7ffda4ee1f98) at /data/Server/bb-10.7-MDEV-26520/sql/main.cc:34

Thread 11 (Thread 0x7faebb3fb700 (LWP 1378192)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faebb3fa810, clockid=<optimized out>, expected=0, futex_word=0x63000001fd2c) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faebb3fa810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fd00) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fd00, mutex=0x618000000590, abstime=0x7faebb3fa810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fd00, __mutex=0x618000000590, __abs_timeout=0x7faebb3fa810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fd00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fd00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fd00, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fd00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fd00, t=0x7faebb3fabc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fd00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000000a28: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000000a20: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000000a28: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000000a18) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000000a18) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000000a10) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7faebe632700 (LWP 1378188)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faebe631de0, clockid=<optimized out>, expected=0, futex_word=0x55de92980ae8 <COND_timer+40>) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faebe631de0, clockid=<optimized out>, mutex=0x55de92980a08 <LOCK_timer+40>, cond=0x55de92980ac0 <COND_timer>) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x55de92980ac0 <COND_timer>, mutex=0x55de92980a08 <LOCK_timer+40>, abstime=0x7faebe631de0) at pthread_cond_wait.c:656
#3  0x000055de8fe636e4 in safe_cond_timedwait (cond=0x55de92980ac0 <COND_timer>, mp=0x55de929809e0 <LOCK_timer>, abstime=0x7faebe631de0, file=0x55de90f495a0 "/data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h", line=1088) at /data/Server/bb-10.7-MDEV-26520/mysys/thr_mutex.c:546
#4  0x000055de8fe654ec in inline_mysql_cond_timedwait (that=0x55de92980ac0 <COND_timer>, mutex=0x55de929809e0 <LOCK_timer>, abstime=0x7faebe631de0, src_file=0x55de90f49640 "/data/Server/bb-10.7-MDEV-26520/mysys/thr_timer.c", src_line=321) at /data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h:1088
#5  0x000055de8fe669d9 in timer_handler (arg=0x0) at /data/Server/bb-10.7-MDEV-26520/mysys/thr_timer.c:321
#6  0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7faeb6c48700 (LWP 1378197)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb6c47810, clockid=<optimized out>, expected=0, futex_word=0x63000001fb28) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb6c47810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fb00) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fb00, mutex=0x618000000590, abstime=0x7faeb6c47810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fb00, __mutex=0x618000000590, __abs_timeout=0x7faeb6c47810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fb00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fb00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fb00, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fb00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fb00, t=0x7faeb6c47bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fb00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000004028: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000004020: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000004028: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000004018) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000004018) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000004010) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7faeb745f700 (LWP 1378196)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb745e810, clockid=<optimized out>, expected=0, futex_word=0x63000001fba8) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb745e810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fb80) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fb80, mutex=0x618000000590, abstime=0x7faeb745e810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fb80, __mutex=0x618000000590, __abs_timeout=0x7faeb745e810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fb80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fb80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fb80, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fb80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fb80, t=0x7faeb745ebc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fb80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000020a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000020a0: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000020a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002098) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002098) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002090) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7faebdcbc700 (LWP 1378189)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007faec1cd6ee4 in __sys_io_uring_enter2 (fd=<optimized out>, to_submit=<optimized out>, min_complete=<optimized out>, flags=<optimized out>, sig=<optimized out>, sz=<optimized out>) at syscall.c:54
#2  0x00007faec1cd6a25 in _io_uring_get_cqe (ring=0x613000000908, cqe_ptr=0x7faebdcbbbf0, data=data@entry=0x7faebdcbbb30) at queue.c:122
#3  0x00007faec1cd6aeb in __io_uring_get_cqe (ring=<optimized out>, cqe_ptr=<optimized out>, submit=<optimized out>, wait_nr=<optimized out>, sigmask=<optimized out>) at queue.c:150
#4  0x000055de8fccbed5 in io_uring_wait_cqe_nr (ring=0x613000000908, cqe_ptr=0x7faebdcbbbf0, wait_nr=1) at /usr/include/liburing.h:635
#5  0x000055de8fccbeff in io_uring_wait_cqe (ring=0x613000000908, cqe_ptr=0x7faebdcbbbf0) at /usr/include/liburing.h:655
#6  0x000055de8fccd1bf in (anonymous namespace)::aio_uring::thread_routine (aio=0x613000000900) at /data/Server/bb-10.7-MDEV-26520/tpool/aio_liburing.cc:137
#7  0x000055de8fcce305 in std::__invoke_impl<void, void (*)((anonymous namespace)::aio_uring*), (anonymous namespace)::aio_uring*> (__f=@0x603000000530: 0x55de8fccd103 <(anonymous namespace)::aio_uring::thread_routine((anonymous namespace)::aio_uring*)>) at /usr/include/c++/9/bits/invoke.h:60
#8  0x000055de8fcce1ec in std::__invoke<void (*)((anonymous namespace)::aio_uring*), (anonymous namespace)::aio_uring*> (__fn=@0x603000000530: 0x55de8fccd103 <(anonymous namespace)::aio_uring::thread_routine((anonymous namespace)::aio_uring*)>) at /usr/include/c++/9/bits/invoke.h:95
#9  0x000055de8fcce0d9 in std::thread::_Invoker<std::tuple<void (*)((anonymous namespace)::aio_uring*), (anonymous namespace)::aio_uring*> >::_M_invoke<0, 1> (this=0x603000000528) at /usr/include/c++/9/thread:244
#10 0x000055de8fcce043 in std::thread::_Invoker<std::tuple<void (*)((anonymous namespace)::aio_uring*), (anonymous namespace)::aio_uring*> >::operator() (this=0x603000000528) at /usr/include/c++/9/thread:251
#11 0x000055de8fccdfac in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)((anonymous namespace)::aio_uring*), (anonymous namespace)::aio_uring*> > >::_M_run (this=0x603000000520) at /usr/include/c++/9/thread:195
#12 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#13 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#14 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7faeb9f6d700 (LWP 1378193)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb9f6cce0, clockid=<optimized out>, expected=0, futex_word=0x55de929094c8 <COND_checkpoint+40>) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb9f6cce0, clockid=<optimized out>, mutex=0x55de929093e8 <LOCK_checkpoint+40>, cond=0x55de929094a0 <COND_checkpoint>) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x55de929094a0 <COND_checkpoint>, mutex=0x55de929093e8 <LOCK_checkpoint+40>, abstime=0x7faeb9f6cce0) at pthread_cond_wait.c:656
#3  0x000055de8fe636e4 in safe_cond_timedwait (cond=0x55de929094a0 <COND_checkpoint>, mp=0x55de929093c0 <LOCK_checkpoint>, abstime=0x7faeb9f6cce0, file=0x55de90a74000 "/data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h", line=1088) at /data/Server/bb-10.7-MDEV-26520/mysys/thr_mutex.c:546
#4  0x000055de8f23c08a in inline_mysql_cond_timedwait (that=0x55de929094a0 <COND_checkpoint>, mutex=0x55de929093c0 <LOCK_checkpoint>, abstime=0x7faeb9f6cce0, src_file=0x55de90a74100 "/data/Server/bb-10.7-MDEV-26520/storage/maria/ma_servicethread.c", src_line=115) at /data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h:1088
#5  0x000055de8f23c93d in my_service_thread_sleep (control=0x55de91aa9900 <checkpoint_control>, sleep_time=29000000000) at /data/Server/bb-10.7-MDEV-26520/storage/maria/ma_servicethread.c:115
#6  0x000055de8f222a8c in ma_checkpoint_background (arg=0x1e) at /data/Server/bb-10.7-MDEV-26520/storage/maria/ma_checkpoint.c:707
#7  0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7faebc83f700 (LWP 1378190)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55de91d0d628 <buf_pool+17576>) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55de91d0d528 <buf_pool+17320>, cond=0x55de91d0d600 <buf_pool+17536>) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55de91d0d600 <buf_pool+17536>, mutex=0x55de91d0d528 <buf_pool+17320>) at pthread_cond_wait.c:638
#3  0x000055de8fe62dab in safe_cond_wait (cond=0x55de91d0d600 <buf_pool+17536>, mp=0x55de91d0d500 <buf_pool+17280>, file=0x55de90ddca20 "/data/Server/bb-10.7-MDEV-26520/storage/innobase/buf/buf0flu.cc", line=2201) at /data/Server/bb-10.7-MDEV-26520/mysys/thr_mutex.c:492
#4  0x000055de8fab60af in buf_flush_page_cleaner () at /data/Server/bb-10.7-MDEV-26520/storage/innobase/buf/buf0flu.cc:2201
#5  0x000055de8fabc484 in std::__invoke_impl<void, void (*)()> (__f=@0x6020000002b8: 0x55de8fab5b25 <buf_flush_page_cleaner()>) at /usr/include/c++/9/bits/invoke.h:60
#6  0x000055de8fabc3c0 in std::__invoke<void (*)()> (__fn=@0x6020000002b8: 0x55de8fab5b25 <buf_flush_page_cleaner()>) at /usr/include/c++/9/bits/invoke.h:95
#7  0x000055de8fabc2e6 in std::thread::_Invoker<std::tuple<void (*)()> >::_M_invoke<0ul> (this=0x6020000002b8) at /usr/include/c++/9/thread:244
#8  0x000055de8fabc267 in std::thread::_Invoker<std::tuple<void (*)()> >::operator() (this=0x6020000002b8) at /usr/include/c++/9/thread:251
#9  0x000055de8fabc1cc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)()> > >::_M_run (this=0x6020000002b0) at /usr/include/c++/9/thread:195
#10 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#12 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7faebbbfc700 (LWP 1378191)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faebbbfb810, clockid=<optimized out>, expected=0, futex_word=0x63000001fdac) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faebbbfb810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fd80) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fd80, mutex=0x618000000590, abstime=0x7faebbbfb810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fd80, __mutex=0x618000000590, __abs_timeout=0x7faebbbfb810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fd80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fd80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fd80, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fd80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fd80, t=0x7faebbbfbbc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fd80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000000968: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000000960: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000000968: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000000958) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000000958) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000000950) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7faeb7c68700 (LWP 1378195)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb7c67810, clockid=<optimized out>, expected=0, futex_word=0x63000001fc28) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb7c67810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fc00) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fc00, mutex=0x618000000590, abstime=0x7faeb7c67810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fc00, __mutex=0x618000000590, __abs_timeout=0x7faeb7c67810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fc00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fc00, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fc00, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fc00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fc00, t=0x7faeb7c67bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fc00) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002068: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002060: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002068: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002058) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002058) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002050) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7faeb8469700 (LWP 1378194)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7faeb8468810, clockid=<optimized out>, expected=0, futex_word=0x63000001fcac) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7faeb8468810, clockid=<optimized out>, mutex=0x618000000590, cond=0x63000001fc80) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000001fc80, mutex=0x618000000590, abstime=0x7faeb8468810) at pthread_cond_wait.c:656
#3  0x000055de8fcba3d3 in __gthread_cond_timedwait (__cond=0x63000001fc80, __mutex=0x618000000590, __abs_timeout=0x7faeb8468810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055de8fcc222f in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fc80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055de8fcbfc1f in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000001fc80, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055de8fcbd04b in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000001fc80, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055de8fcb674e in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000480, lk=..., thread_data=0x63000001fc80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:450
#8  0x000055de8fcb6bac in tpool::thread_pool_generic::get_task (this=0x618000000480, thread_var=0x63000001fc80, t=0x7faeb8468bc0) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:503
#9  0x000055de8fcb71ec in tpool::thread_pool_generic::worker_main (this=0x618000000480, thread_var=0x63000001fc80) at /data/Server/bb-10.7-MDEV-26520/tpool/tpool_generic.cc:548
#10 0x000055de8fcc9c9b in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002028: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002020: 0x618000000480) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055de8fcc9a46 in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002028: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55de8fcb70ca <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055de8fcc98d7 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002018) at /usr/include/c++/9/thread:244
#13 0x000055de8fcc9821 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002018) at /usr/include/c++/9/thread:251
#14 0x000055de8fcc9786 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002010) at /usr/include/c++/9/thread:195
#15 0x00007faec1aa2d84 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7faeb10cb700 (LWP 1378212)):
#0  __pthread_kill (threadid=<optimized out>, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56
#1  0x000055de8fe5767b in my_write_core (sig=6) at /data/Server/bb-10.7-MDEV-26520/mysys/stacktrace.c:424
#2  0x000055de8ec71de3 in handle_fatal_signal (sig=6) at /data/Server/bb-10.7-MDEV-26520/sql/signal_handler.cc:345
#3  <signal handler called>
#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#5  0x00007faec1695859 in __GI_abort () at abort.c:79
#6  0x000055de8fe616fa in safe_mutex_lock (mp=0x55de9209c900 <LOCK_global_system_variables>, my_flags=0, file=0x55de903392a0 "/data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc", line=1245) at /data/Server/bb-10.7-MDEV-26520/mysys/thr_mutex.c:262
#7  0x000055de8e34f142 in inline_mysql_mutex_lock (that=0x55de9209c900 <LOCK_global_system_variables>, src_file=0x55de903392a0 "/data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc", src_line=1245) at /data/Server/bb-10.7-MDEV-26520/include/mysql/psi/mysql_thread.h:750
#8  0x000055de8e358add in THD::init (this=0x62b0000a8218) at /data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc:1245
#9  0x000055de8e356018 in THD::THD (this=0x62b0000a8218, id=0, is_wsrep_applier=false) at /data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc:849
#10 0x000055de8e37336e in create_background_thd () at /data/Server/bb-10.7-MDEV-26520/sql/sql_class.cc:4915
#11 0x000055de8f4a0791 in innobase_create_background_thd (name=0x55de90cfa300 "InnoDB purge worker") at /data/Server/bb-10.7-MDEV-26520/storage/innobase/handler/ha_innodb.cc:1794
#12 0x000055de8f909488 in purge_create_background_thds (n=5) at /data/Server/bb-10.7-MDEV-26520/storage/innobase/srv/srv0srv.cc:1810
#13 0x000055de8f908d9d in srv_update_purge_thread_count (n=5) at /data/Server/bb-10.7-MDEV-26520/storage/innobase/srv/srv0srv.cc:1707
#14 0x000055de8f4f47bb in innodb_purge_threads_update (save=0x62900004b3d8) at /data/Server/bb-10.7-MDEV-26520/storage/innobase/handler/ha_innodb.cc:18750
#15 0x000055de8e4f7942 in sys_var_pluginvar::global_update (this=0x625000009698, thd=0x62b0000af218, var=0x62900004b3b8) at /data/Server/bb-10.7-MDEV-26520/sql/sql_plugin.cc:3622
#16 0x000055de8e20aad8 in sys_var::update (this=0x625000009698, thd=0x62b0000af218, var=0x62900004b3b8) at /data/Server/bb-10.7-MDEV-26520/sql/set_var.cc:207
#17 0x000055de8e20f494 in set_var::update (this=0x62900004b3b8, thd=0x62b0000af218) at /data/Server/bb-10.7-MDEV-26520/sql/set_var.cc:863
#18 0x000055de8e20e900 in sql_set_variables (thd=0x62b0000af218, var_list=0x62b0000b4288, free=true) at /data/Server/bb-10.7-MDEV-26520/sql/set_var.cc:745
#19 0x000055de8e48c94e in mysql_execute_command (thd=0x62b0000af218, is_called_from_prepared_stmt=false) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:5036
#20 0x000055de8e49f8de in mysql_parse (thd=0x62b0000af218, rawbuf=0x62900004b238 "SET GLOBAL innodb_purge_threads = 5", length=35, parser_state=0x7faeb10c9b20) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:8036
#21 0x000055de8e477ac5 in dispatch_command (command=COM_QUERY, thd=0x62b0000af218, packet=0x62900025d219 "SET GLOBAL innodb_purge_threads = 5", packet_length=35, blocking=true) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:1896
#22 0x000055de8e474e9d in do_command (thd=0x62b0000af218, blocking=true) at /data/Server/bb-10.7-MDEV-26520/sql/sql_parse.cc:1404
#23 0x000055de8e89fd4d in do_handle_one_connection (connect=0x608000003cb8, put_in_cache=true) at /data/Server/bb-10.7-MDEV-26520/sql/sql_connect.cc:1418
#24 0x000055de8e89f5de in handle_one_connection (arg=0x608000003c38) at /data/Server/bb-10.7-MDEV-26520/sql/sql_connect.cc:1312
#25 0x00007faec1bbe609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#26 0x00007faec1792293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

 - saving '/data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/log/main.MDEV-26520-innodb/' to '/data/Server_bin/bb-10.7-MDEV-26520_asan/mysql-test/var/log/main.MDEV-26520-innodb/'
--------------------------------------------------------------------------
The servers were restarted 0 times
Spent 0.000 of 14 seconds executing testcases

Failure: Failed 1/1 tests, 0.00% were successful.

Failing test(s): main.MDEV-26520

The log files in var/log may give you some hint of what went wrong.

If you want to report this error, please read first the documentation
at http://dev.mysql.com/doc/mysql/en/mysql-test-suite.html