Server hangs on purge or failing assertions `!rw_lock_own_flagged(lock, RW_LOCK_FLAG_X | RW_LOCK_FLAG_S)' / `!rw_lock_own(lock, RW_LOCK_S)'

--source include/have_innodb.inc

SET GLOBAL innodb_stats_persistent= OFF;

CREATE TABLE t1 (

    pk int,

    a blob,

    b blob as (left (a, 20)),

    primary key (pk),

    key (b(20))

) ENGINE=InnoDB;

INSERT INTO t1 (pk,a) VALUES (1,'foo'),(2,'bar');

DELETE FROM t1;

INSERT INTO t1 (pk,a) VALUES (1,'foo'),(2,'bar');

--source include/restart_mysqld.inc

--sleep 5

# Cleanup

DROP TABLE t1;

--source include/have_innodb.inc

SET GLOBAL innodb_stats_persistent= ON;

CREATE TABLE t1 (

    pk int auto_increment,

    a int,

    b blob,

    primary key (pk),

    unique (b),

    unique (a)

) ENGINE=InnoDB;

INSERT INTO t1 VALUES (1,0,'foo'),(2,1,NULL);

DELETE FROM t1;

INSERT INTO t1 VALUES (1,0,'foo'),(2,1,NULL);

--let $restart_parameters= --innodb_stats_persistent=on

--source include/restart_mysqld.inc

--sleep 5

# Cleanup

DROP TABLE t1;

Thread 9 (Thread 0x7f25111f6700 (LWP 16832)):

#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185

#1  0x0000557549b0e176 in os_event::wait (this=0x55754cdf30f8) at /data/src/10.5/storage/innobase/os/os0event.cc:158

#2  os_event::wait_low (reset_sig_count=1, this=0x55754cdf30f8) at /data/src/10.5/storage/innobase/os/os0event.cc:325

#3  os_event_wait_low (event=0x55754cdf30f8, reset_sig_count=<optimized out>) at /data/src/10.5/storage/innobase/os/os0event.cc:502

#4  0x0000557549bac7eb in sync_array_wait_event (arr=arr@entry=0x55754cccdff8, cell=@0x7f25111f1e58: 0x55754ccce098) at /data/src/10.5/storage/innobase/sync/sync0arr.cc:456

#5  0x0000557549bae7e2 in rw_lock_s_lock_spin (lock=lock@entry=0x7f2513815388, pass=pass@entry=0, file_name=file_name@entry=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", line=line@entry=6671) at /data/src/10.5/storage/innobase/sync/sync0rw.cc:367

#6  0x0000557549c38bdb in rw_lock_s_lock_func (pass=0, line=6671, file_name=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", lock=0x7f2513815388) at /data/src/10.5/storage/innobase/include/sync0rw.ic:294

#7  pfs_rw_lock_s_lock_func (pass=0, line=6671, file_name=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", lock=0x7f2513815388) at /data/src/10.5/storage/innobase/include/sync0rw.ic:644

#8  buf_page_mtr_lock (line=6671, file=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", mtr=0x7f25111f2c30, rw_latch=1, block=<optimized out>) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:2985

#9  buf_page_get_low (page_id=..., zip_size=zip_size@entry=0, rw_latch=rw_latch@entry=1, guess=<optimized out>, mode=<optimized out>, file=<optimized out>, line=<optimized out>, mtr=<optimized out>, err=<optimized out>, allow_ibuf_merge=<optimized out>) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3571

#10 0x0000557549c38c7d in buf_page_get_gen (page_id=..., zip_size=zip_size@entry=0, rw_latch=rw_latch@entry=1, guess=guess@entry=0x0, mode=mode@entry=10, file=file@entry=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", line=6671, mtr=0x7f25111f2c30, err=0x7f25111f22dc, allow_ibuf_merge=false) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3640

#11 0x0000557549c16fd5 in btr_cur_open_at_rnd_pos_func (latch_mode=1, file=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", line=6671, mtr=0x7f25111f2c30, cursor=0x7f25111f22f0, index=<optimized out>) at /data/src/10.5/storage/innobase/btr/btr0cur.cc:2969

#12 btr_estimate_number_of_different_key_vals (index=index@entry=0x7f24f4015890) at /data/src/10.5/storage/innobase/btr/btr0cur.cc:6671

#13 0x0000557549c90a17 in dict_stats_update_transient_for_index (index=index@entry=0x7f24f4015890) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:887

#14 0x0000557549c97b59 in dict_stats_update_transient (table=0x7f24f4013630) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:945

#15 dict_stats_update (table=table@entry=0x7f24f4013630, stats_upd_option=<optimized out>) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:3329

#16 0x0000557549aa3d01 in dict_stats_init (table=<optimized out>) at /data/src/10.5/storage/innobase/include/dict0stats.ic:165

#17 ha_innobase::open (this=0x7f24f400eae0, name=0x7f24f400c678 "./test/t1") at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:5830

#18 0x000055754978c89a in handler::ha_open (this=0x7f24f400eae0, table_arg=table_arg@entry=0x7f24f400dce8, name=0x7f24f400c678 "./test/t1", mode=2, test_if_locked=test_if_locked@entry=18, mem_root=mem_root@entry=0x0, partitions_to_open=0x0) at /data/src/10.5/sql/handler.cc:2954

#19 0x000055754964a25c in open_table_from_share (thd=thd@entry=0x7f24f4000a98, share=share@entry=0x7f24f400c1e0, alias=alias@entry=0x7f24f400b828, db_stat=db_stat@entry=33, prgflag=prgflag@entry=8, ha_open_flags=18, outparam=<optimized out>, is_create_table=<optimized out>, partitions_to_open=<optimized out>) at /data/src/10.5/sql/table.cc:4186

#20 0x0000557549523769 in open_table (thd=thd@entry=0x7f24f4000a98, table_list=table_list@entry=0x7f24f400b7e0, ot_ctx=ot_ctx@entry=0x7f25111f4520) at /data/src/10.5/sql/sql_base.cc:1988

#21 0x000055754953b701 in open_purge_table (thd=thd@entry=0x7f24f4000a98, db=db@entry=0x7f25111f45b0 "test", dblen=<optimized out>, tb=tb@entry=0x7f25111f4680 "t1", tblen=<optimized out>) at /data/src/10.5/sql/sql_class.cc:4730

#22 0x0000557549a8dd4a in innodb_find_table_for_vc (thd=0x7f24f4000a98, table=0x7f24f4013630) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20642

#23 0x0000557549a9b0c1 in innobase_allocate_row_for_vcol (thd=thd@entry=0x7f24f4000a98, index=index@entry=0x7f24f4015890, heap=heap@entry=0x7f25111f47d0, table=table@entry=0x7f25111f47e0, record=record@entry=0x7f25111f47e8, storage=storage@entry=0x7f25111f47d8) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20785

#24 0x0000557549b98835 in row_vers_build_clust_v_col (row=row@entry=0x7f24f400b3b0, clust_index=clust_index@entry=0x7f24f4014cf0, index=index@entry=0x7f24f4015890, heap=0x7f24f400b338) at /data/src/10.5/storage/innobase/row/row0vers.cc:465

#25 0x0000557549b9b424 in row_vers_old_has_index_entry (also_curr=also_curr@entry=true, rec=0x7f2513cf807f "\200", mtr=mtr@entry=0x7f25111f4930, index=index@entry=0x7f24f4015890, ientry=ientry@entry=0x7f24f40145d0, roll_ptr=1125899927290647, trx_id=0) at /data/src/10.5/storage/innobase/row/row0vers.cc:929

#26 0x0000557549b7f8e1 in row_purge_poss_sec (node=node@entry=0x55754ce5fae8, index=index@entry=0x7f24f4015890, entry=entry@entry=0x7f24f40145d0, sec_pcur=sec_pcur@entry=0x7f25111f4e80, sec_mtr=sec_mtr@entry=0x7f25111f5100, is_tree=is_tree@entry=false) at /data/src/10.5/storage/innobase/row/row0purge.cc:245

#27 0x0000557549b7fdab in row_purge_remove_sec_if_poss_leaf (node=node@entry=0x55754ce5fae8, index=index@entry=0x7f24f4015890, entry=entry@entry=0x7f24f40145d0) at /data/src/10.5/storage/innobase/row/row0purge.cc:466

#28 0x0000557549b80cad in row_purge_remove_sec_if_poss (entry=0x7f24f40145d0, index=<optimized out>, node=0x55754ce5fae8) at /data/src/10.5/storage/innobase/row/row0purge.cc:568

#29 row_purge_del_mark (node=0x55754ce5fae8) at /data/src/10.5/storage/innobase/row/row0purge.cc:638

#30 row_purge_record_func (node=node@entry=0x55754ce5fae8, undo_rec=undo_rec@entry=0x55754ce6edd8 "", thr=thr@entry=0x55754ce5fa40, updated_extern=<optimized out>) at /data/src/10.5/storage/innobase/row/row0purge.cc:1048

#31 0x0000557549b81c54 in row_purge (thr=0x55754ce5fa40, undo_rec=0x55754ce6edd8 "", node=0x55754ce5fae8) at /data/src/10.5/storage/innobase/row/row0purge.cc:1109

#32 row_purge_step (thr=thr@entry=0x55754ce5fa40) at /data/src/10.5/storage/innobase/row/row0purge.cc:1158

#33 0x0000557549b36d1c in que_thr_step (thr=0x1e) at /data/src/10.5/storage/innobase/que/que0que.cc:947

#34 que_run_threads_low (thr=0x1e) at /data/src/10.5/storage/innobase/que/que0que.cc:1009

#35 que_run_threads (thr=thr@entry=0x55754ce5fa40) at /data/src/10.5/storage/innobase/que/que0que.cc:1049

#36 0x0000557549ba49b0 in srv_task_execute () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2030

#37 purge_worker_callback () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2195

#38 0x0000557549d285c2 in tpool::task_group::execute (this=0x55754b1db0c0 <purge_task_group>, t=0x55754b1bc860 <purge_worker_task>) at /data/src/10.5/tpool/task_group.cc:55

#39 0x0000557549d2747f in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd079b0) at /data/src/10.5/tpool/tpool_generic.cc:518

#40 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

#41 0x00007f251f2bf4a4 in start_thread (arg=0x7f25111f6700) at pthread_create.c:456

#42 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Version: '10.5.5-MariaDB-debug-log'  socket: '/data/bld/10.5-debug-nightly/mysql-test/var/tmp/mysqld.1.sock'  port: 16000  Source distribution

mariadbd: /data/src/10.5/storage/innobase/sync/sync0rw.cc:760: void rw_lock_sx_lock_func(rw_lock_t*, ulint, const char*, unsigned int): Assertion `!rw_lock_own(lock, RW_LOCK_S)' failed.

200626 16:13:56 [ERROR] mysqld got signal 6 ;

#7  0x00007f04727bcf12 in __GI___assert_fail (assertion=0x5638cd724d15 "!rw_lock_own(lock, RW_LOCK_S)", file=0x5638cd724b80 "/data/src/10.5/storage/innobase/sync/sync0rw.cc", line=760, function=0x5638cd725820 <rw_lock_sx_lock_func(rw_lock_t*, unsigned long, char const*, unsigned int)::__PRETTY_FUNCTION__> "void rw_lock_sx_lock_func(rw_lock_t*, ulint, const char*, unsigned int)") at assert.c:101

#8  0x00005638ccfb6abc in rw_lock_sx_lock_func (lock=0x7f046781c7d0, pass=0, file_name=0x5638cd7487c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=227) at /data/src/10.5/storage/innobase/sync/sync0rw.cc:760

#9  0x00005638cd08304d in pfs_rw_lock_sx_lock_func (lock=0x7f046781c7d0, pass=0, file_name=0x5638cd7487c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=227) at /data/src/10.5/storage/innobase/include/sync0rw.ic:678

#10 0x00005638cd08a666 in buf_page_mtr_lock (block=0x7f046781c750, rw_latch=4, mtr=0x7f0465ff92d0, file=0x5638cd7487c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=227) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:2989

#11 0x00005638cd08c279 in buf_page_get_low (page_id=..., zip_size=0, rw_latch=4, guess=0x0, mode=10, file=0x5638cd7487c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=227, mtr=0x7f0465ff92d0, err=0x7f0465ff91cc, allow_ibuf_merge=false) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3571

#12 0x00005638cd08c5f2 in buf_page_get_gen (page_id=..., zip_size=0, rw_latch=4, guess=0x0, mode=10, file=0x5638cd7487c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=227, mtr=0x7f0465ff92d0, err=0x7f0465ff91cc, allow_ibuf_merge=false) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3640

#13 0x00005638ccdda754 in btr_block_get_func (index=..., page=3, mode=4, merge=false, file=0x5638cd7487c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=227, mtr=0x7f0465ff92d0) at /data/src/10.5/storage/innobase/include/btr0btr.h:240

#14 0x00005638cd01fbf1 in btr_root_block_get (index=0x7f04580165a8, mode=RW_SX_LATCH, mtr=0x7f0465ff92d0) at /data/src/10.5/storage/innobase/btr/btr0btr.cc:226

#15 0x00005638cd020a60 in btr_get_size (index=0x7f04580165a8, flag=2, mtr=0x7f0465ff92d0) at /data/src/10.5/storage/innobase/btr/btr0btr.cc:603

#16 0x00005638cd102ffb in dict_stats_update_transient_for_index (index=0x7f04580165a8) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:858

#17 0x00005638cd103329 in dict_stats_update_transient (table=0x7f04580148c8) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:945

#18 0x00005638cd109161 in dict_stats_update (table=0x7f04580148c8, stats_upd_option=DICT_STATS_RECALC_TRANSIENT) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:3329

#19 0x00005638ccd70daa in dict_stats_init (table=0x7f04580148c8) at /data/src/10.5/storage/innobase/include/dict0stats.ic:165

#20 0x00005638ccd7ac54 in ha_innobase::open (this=0x7f0458011980, name=0x7f045800dae8 "./test/t1") at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:5830

#21 0x00005638cc9224de in handler::ha_open (this=0x7f0458011980, table_arg=0x7f0458010698, name=0x7f045800dae8 "./test/t1", mode=2, test_if_locked=18, mem_root=0x0, partitions_to_open=0x0) at /data/src/10.5/sql/handler.cc:2954

#22 0x00005638cc706c81 in open_table_from_share (thd=0x7f0458000ce8, share=0x7f045800d550, alias=0x7f045800ca28, db_stat=33, prgflag=8, ha_open_flags=18, outparam=0x7f0458010698, is_create_table=false, partitions_to_open=0x0) at /data/src/10.5/sql/table.cc:4186

#23 0x00005638cc51be4a in open_table (thd=0x7f0458000ce8, table_list=0x7f045800c9e0, ot_ctx=0x7f0465ffa4d0) at /data/src/10.5/sql/sql_base.cc:1988

#24 0x00005638cc552854 in open_purge_table (thd=0x7f0458000ce8, db=0x7f0465ffa560 "test", dblen=4, tb=0x7f0465ffa630 "t1", tblen=2) at /data/src/10.5/sql/sql_class.cc:4730

#25 0x00005638ccd983ba in innodb_find_table_for_vc (thd=0x7f0458000ce8, table=0x7f04580148c8) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20642

#26 0x00005638ccd98989 in innobase_allocate_row_for_vcol (thd=0x7f0458000ce8, index=0x7f04580173c8, heap=0x7f0465ffa7a0, table=0x7f0465ffa7b0, record=0x7f0465ffa7b8, storage=0x7f0465ffa7a8) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20785

#27 0x00005638ccf9a6cb in row_vers_build_clust_v_col (row=0x7f045800c558, clust_index=0x7f04580165a8, index=0x7f04580173c8, heap=0x7f045800c4b8) at /data/src/10.5/storage/innobase/row/row0vers.cc:465

#28 0x00005638ccf9b92c in row_vers_old_has_index_entry (also_curr=true, rec=0x7f0467d0807f "\200", mtr=0x7f0465ffa900, index=0x7f04580173c8, ientry=0x7f0458015c08, roll_ptr=1125899927290647, trx_id=0) at /data/src/10.5/storage/innobase/row/row0vers.cc:929

#29 0x00005638ccf5ab20 in row_purge_poss_sec (node=0x5638d00ec6d8, index=0x7f04580173c8, entry=0x7f0458015c08, sec_pcur=0x7f0465ffae30, sec_mtr=0x7f0465ffb0d0, is_tree=false) at /data/src/10.5/storage/innobase/row/row0purge.cc:245

#30 0x00005638ccf5b4c0 in row_purge_remove_sec_if_poss_leaf (node=0x5638d00ec6d8, index=0x7f04580173c8, entry=0x7f0458015c08) at /data/src/10.5/storage/innobase/row/row0purge.cc:466

#31 0x00005638ccf5b9ac in row_purge_remove_sec_if_poss (node=0x5638d00ec6d8, index=0x7f04580173c8, entry=0x7f0458015c08) at /data/src/10.5/storage/innobase/row/row0purge.cc:568

#32 0x00005638ccf5bbbd in row_purge_del_mark (node=0x5638d00ec6d8) at /data/src/10.5/storage/innobase/row/row0purge.cc:638

#33 0x00005638ccf5d5e0 in row_purge_record_func (node=0x5638d00ec6d8, undo_rec=0x5638d00fbd60 "", thr=0x5638d00ec630, updated_extern=false) at /data/src/10.5/storage/innobase/row/row0purge.cc:1048

#34 0x00005638ccf5d8a2 in row_purge (node=0x5638d00ec6d8, undo_rec=0x5638d00fbd60 "", thr=0x5638d00ec630) at /data/src/10.5/storage/innobase/row/row0purge.cc:1109

#35 0x00005638ccf5da21 in row_purge_step (thr=0x5638d00ec630) at /data/src/10.5/storage/innobase/row/row0purge.cc:1158

#36 0x00005638ccec873e in que_thr_step (thr=0x5638d00ec630) at /data/src/10.5/storage/innobase/que/que0que.cc:947

#37 0x00005638ccec89d5 in que_run_threads_low (thr=0x5638d00ec630) at /data/src/10.5/storage/innobase/que/que0que.cc:1009

#38 0x00005638ccec8c25 in que_run_threads (thr=0x5638d00ec630) at /data/src/10.5/storage/innobase/que/que0que.cc:1049

#39 0x00005638ccfa462b in srv_task_execute () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2030

#40 0x00005638ccfa4e29 in purge_worker_callback () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2195

#41 0x00005638cd1c01d4 in tpool::task_group::execute (this=0x5638cea0d0e0 <purge_task_group>, t=0x5638cea0ce60 <purge_worker_task>) at /data/src/10.5/tpool/task_group.cc:55

#42 0x00005638cd1c058a in tpool::task::execute (this=0x5638cea0ce60 <purge_worker_task>) at /data/src/10.5/tpool/task.cc:47

#43 0x00005638cd1b9d72 in tpool::thread_pool_generic::worker_main (this=0x5638cff480b0, thread_var=0x5638cff57bc0) at /data/src/10.5/tpool/tpool_generic.cc:518

#44 0x00005638cd1bffe5 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f0468001ee8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x5638cd1b9cda <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x82096fb>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x8209707>) at /usr/include/c++/6/functional:227

#45 0x00005638cd1bff57 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f0468001ee8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x5638cd1b9cda <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x82096fb>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x8209707>) at /usr/include/c++/6/functional:251

#46 0x00005638cd1bfeeb in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f0468001ee8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x82096fb>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x8209707>) at /usr/include/c++/6/functional:604

#47 0x00005638cd1bfe9d in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f0468001ed8) at /usr/include/c++/6/functional:1391

#48 0x00005638cd1bfd9b in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f0468001ed8) at /usr/include/c++/6/functional:1380

#49 0x00005638cd1bfd7a in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f0468001ed0) at /usr/include/c++/6/thread:197

#50 0x00007f0473104e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

#51 0x00007f04747454a4 in start_thread (arg=0x7f0465ffc700) at pthread_create.c:456

#52 0x00007f0472879d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

mariadbd: /data/src/10.5/storage/innobase/include/sync0rw.ic:288: void rw_lock_s_lock_func(rw_lock_t*, ulint, const char*, unsigned int): Assertion `!rw_lock_own_flagged(lock, RW_LOCK_FLAG_X | RW_LOCK_FLAG_S)' failed.

200626 16:16:30 [ERROR] mysqld got signal 6 ;

#7  0x00007fdcc2a47f12 in __GI___assert_fail (assertion=0x55591f1343e0 "!rw_lock_own_flagged(lock, RW_LOCK_FLAG_X | RW_LOCK_FLAG_S)", file=0x55591f1343a8 "/data/src/10.5/storage/innobase/include/sync0rw.ic", line=288, function=0x55591f138de0 <_ZZL19rw_lock_s_lock_funcP9rw_lock_tmPKcjE19__PRETTY_FUNCTION__> "void rw_lock_s_lock_func(rw_lock_t*, ulint, const char*, unsigned int)") at assert.c:101

#8  0x000055591ea4b332 in rw_lock_s_lock_func (lock=0x7fdcbc2807d0, pass=0, file_name=0x55591f1117c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=1288) at /data/src/10.5/storage/innobase/include/sync0rw.ic:288

#9  0x000055591ea4bf9b in pfs_rw_lock_s_lock_func (lock=0x7fdcbc2807d0, pass=0, file_name=0x55591f1117c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=1288) at /data/src/10.5/storage/innobase/include/sync0rw.ic:644

#10 0x000055591ea53639 in buf_page_mtr_lock (block=0x7fdcbc280750, rw_latch=1, mtr=0x7fdcb63f4650, file=0x55591f1117c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=1288) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:2985

#11 0x000055591ea55279 in buf_page_get_low (page_id=..., zip_size=0, rw_latch=1, guess=0x0, mode=10, file=0x55591f1117c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=1288, mtr=0x7fdcb63f4650, err=0x0, allow_ibuf_merge=false) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3571

#12 0x000055591ea555f2 in buf_page_get_gen (page_id=..., zip_size=0, rw_latch=1, guess=0x0, mode=10, file=0x55591f1117c8 "/data/src/10.5/storage/innobase/btr/btr0btr.cc", line=1288, mtr=0x7fdcb63f4650, err=0x0, allow_ibuf_merge=false) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3640

#13 0x000055591e9ec4aa in btr_read_autoinc_with_fallback (table=0x7fdc9c0148d8, col_no=0) at /data/src/10.5/storage/innobase/btr/btr0btr.cc:1285

#14 0x000055591e743865 in initialize_auto_increment (table=0x7fdc9c0148d8, field=0x7fdc9c00e0b0) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:5755

#15 0x000055591e744532 in ha_innobase::open (this=0x7fdc9c011f60, name=0x7fdc9c00daf8 "./test/t1") at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:6008

#16 0x000055591e2eb4de in handler::ha_open (this=0x7fdc9c011f60, table_arg=0x7fdc9c0110e8, name=0x7fdc9c00daf8 "./test/t1", mode=2, test_if_locked=18, mem_root=0x0, partitions_to_open=0x0) at /data/src/10.5/sql/handler.cc:2954

#17 0x000055591e0cfc81 in open_table_from_share (thd=0x7fdc9c000cf8, share=0x7fdc9c00d560, alias=0x7fdc9c00ca38, db_stat=33, prgflag=8, ha_open_flags=18, outparam=0x7fdc9c0110e8, is_create_table=false, partitions_to_open=0x0) at /data/src/10.5/sql/table.cc:4186

#18 0x000055591dee4e4a in open_table (thd=0x7fdc9c000cf8, table_list=0x7fdc9c00c9f0, ot_ctx=0x7fdcb63f54d0) at /data/src/10.5/sql/sql_base.cc:1988

#19 0x000055591df1b854 in open_purge_table (thd=0x7fdc9c000cf8, db=0x7fdcb63f5560 "test", dblen=4, tb=0x7fdcb63f5630 "t1", tblen=2) at /data/src/10.5/sql/sql_class.cc:4730

#20 0x000055591e7613ba in innodb_find_table_for_vc (thd=0x7fdc9c000cf8, table=0x7fdc9c0148d8) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20642

#21 0x000055591e761989 in innobase_allocate_row_for_vcol (thd=0x7fdc9c000cf8, index=0x7fdc9c0180e8, heap=0x7fdcb63f57a0, table=0x7fdcb63f57b0, record=0x7fdcb63f57b8, storage=0x7fdcb63f57a8) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20785

#22 0x000055591e9636cb in row_vers_build_clust_v_col (row=0x7fdc9c00c568, clust_index=0x7fdc9c0165b8, index=0x7fdc9c0180e8, heap=0x7fdc9c00c4c8) at /data/src/10.5/storage/innobase/row/row0vers.cc:465

#23 0x000055591e96492c in row_vers_old_has_index_entry (also_curr=true, rec=0x7fdcbc76c07f "\200", mtr=0x7fdcb63f5900, index=0x7fdc9c0180e8, ientry=0x7fdc9c015c18, roll_ptr=1970324857618918, trx_id=0) at /data/src/10.5/storage/innobase/row/row0vers.cc:929

#24 0x000055591e923b20 in row_purge_poss_sec (node=0x55592129c6f8, index=0x7fdc9c0180e8, entry=0x7fdc9c015c18, sec_pcur=0x7fdcb63f5e30, sec_mtr=0x7fdcb63f60d0, is_tree=false) at /data/src/10.5/storage/innobase/row/row0purge.cc:245

#25 0x000055591e9244c0 in row_purge_remove_sec_if_poss_leaf (node=0x55592129c6f8, index=0x7fdc9c0180e8, entry=0x7fdc9c015c18) at /data/src/10.5/storage/innobase/row/row0purge.cc:466

#26 0x000055591e9249ac in row_purge_remove_sec_if_poss (node=0x55592129c6f8, index=0x7fdc9c0180e8, entry=0x7fdc9c015c18) at /data/src/10.5/storage/innobase/row/row0purge.cc:568

#27 0x000055591e924bbd in row_purge_del_mark (node=0x55592129c6f8) at /data/src/10.5/storage/innobase/row/row0purge.cc:638

#28 0x000055591e9265e0 in row_purge_record_func (node=0x55592129c6f8, undo_rec=0x7fdca4009330 "", thr=0x55592129c650, updated_extern=false) at /data/src/10.5/storage/innobase/row/row0purge.cc:1048

#29 0x000055591e9268a2 in row_purge (node=0x55592129c6f8, undo_rec=0x7fdca4009330 "", thr=0x55592129c650) at /data/src/10.5/storage/innobase/row/row0purge.cc:1109

#30 0x000055591e926a21 in row_purge_step (thr=0x55592129c650) at /data/src/10.5/storage/innobase/row/row0purge.cc:1158

#31 0x000055591e89173e in que_thr_step (thr=0x55592129c650) at /data/src/10.5/storage/innobase/que/que0que.cc:947

#32 0x000055591e8919d5 in que_run_threads_low (thr=0x55592129c650) at /data/src/10.5/storage/innobase/que/que0que.cc:1009

#33 0x000055591e891c25 in que_run_threads (thr=0x55592129c650) at /data/src/10.5/storage/innobase/que/que0que.cc:1049

#34 0x000055591e96d62b in srv_task_execute () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2030

#35 0x000055591e96de29 in purge_worker_callback () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2195

#36 0x000055591eb891d4 in tpool::task_group::execute (this=0x5559203d60e0 <purge_task_group>, t=0x5559203d5e60 <purge_worker_task>) at /data/src/10.5/tpool/task_group.cc:55

#37 0x000055591eb8958a in tpool::task::execute (this=0x5559203d5e60 <purge_worker_task>) at /data/src/10.5/tpool/task.cc:47

#38 0x000055591eb82d72 in tpool::thread_pool_generic::worker_main (this=0x5559210f8150, thread_var=0x555921107be0) at /data/src/10.5/tpool/tpool_generic.cc:518

#39 0x000055591eb88fe5 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x5559212cd458: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55591eb82cda <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x82096fb>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x8209707>) at /usr/include/c++/6/functional:227

#40 0x000055591eb88f57 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x5559212cd458: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55591eb82cda <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x82096fb>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x8209707>) at /usr/include/c++/6/functional:251

#41 0x000055591eb88eeb in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x5559212cd458, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x82096fb>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x81f7f83, DIE 0x8209707>) at /usr/include/c++/6/functional:604

#42 0x000055591eb88e9d in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x5559212cd448) at /usr/include/c++/6/functional:1391

#43 0x000055591eb88d9b in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x5559212cd448) at /usr/include/c++/6/functional:1380

#44 0x000055591eb88d7a in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x5559212cd440) at /usr/include/c++/6/thread:197

#45 0x00007fdcc338fe6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

#46 0x00007fdcc49d04a4 in start_thread (arg=0x7fdcb63f7700) at pthread_create.c:456

#47 0x00007fdcc2b04d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97