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  1. MariaDB Server
  2. MDEV-24505

innodb.innodb-ucs2 test failed, assertion: list.count > 0, in file storage/innobase/include/ut0lst.h line 334

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      http://buildbot.askmonty.org/buildbot/builders/kvm-fulltest2/builds/26083/steps/mtr_ps/logs/stdio

      innodb.innodb-ucs2 'innodb'              w3 [ fail ]
              Test ended at 2020-12-15 21:24:35
       
      CURRENT_TEST: innodb.innodb-ucs2
      mysqltest: At line 91: query 'insert into t1 values (4,_utf8 0xD0B1,_utf8 0xD0B1,'eight')' failed: 2013: Lost connection to MySQL server during query
       
      The result from queries just before the failure was:
      < snip >
      4	0000563001FC0563	0000563001FC0563	email
      1	0061006200630064006500660067	0061006200630064006500660067	one
      3	0071007200730074007500760077	0071007200730074007500760077	three
      2	0069006A006B0069006C006D006E	0069006A006B0069006C006D006E	two
      drop table t1;
      drop table t2;
      create table t1 (
      a int, b text(10), c text(10), filler text(10), primary key(a, b(2)), unique key (a, c(2))
      ) character set utf8 engine = innodb;
      create table t2 (
      a int, b text(10), c text(10), filler text(10), primary key(a, b(2)), unique key (a, c(2))
      ) character set ucs2 engine = innodb;
      insert into t1 values (1,'abcdefg','abcdefg','one');
      insert into t1 values (2,'ijkilmn','ijkilmn','two');
      insert into t1 values (3,'qrstuvw','qrstuvw','three');
      insert into t1 values (4,_utf8 0xe880bd,_utf8 0xe880bd,'four');
      insert into t1 values (4,_utf8 0x5b,_utf8 0x5b,'five');
      insert into t1 values (4,_utf8 0xe880bde880bd,_utf8 0xe880bde880bd,'six');
      insert into t1 values (4,_utf8 0xe880bdD0B1e880bd,_utf8 0xe880bdD0B1e880bd,'seven');
      insert into t1 values (4,_utf8 0xD0B1,_utf8 0xD0B1,'eight');
       
      More results from queries before failure can be found in /mnt/buildbot/build/mariadb-10.2.37/mysql-test/var/3/log/innodb-ucs2.log
       
       
      Server [mysqld.1 - pid: 9391, winpid: 9391, exit: 256] failed during test run
      Server log from this test:
      ----------SERVER LOG START-----------
      2020-12-15 21:24:33 0xa93f4b40  InnoDB: Assertion failure in file /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ut0lst.h line 334
      InnoDB: Failing assertion: list.count > 0
      InnoDB: We intentionally generate a memory trap.
      InnoDB: Submit a detailed bug report to https://jira.mariadb.org/
      InnoDB: If you get repeated assertion failures or crashes, even
      InnoDB: immediately after the mysqld startup, there may be
      InnoDB: corruption in the InnoDB tablespace. Please refer to
      InnoDB: https://mariadb.com/kb/en/library/innodb-recovery-modes/
      InnoDB: about forcing recovery.
      201215 21:24:33 [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: 10.2.37-MariaDB-debug-log
      key_buffer_size=1048576
      read_buffer_size=131072
      max_used_connections=4
      max_threads=153
      thread_count=10
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 61891 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0xa7101328
      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 = 0xa93f422c thread_stack 0x49000
      mysys/stacktrace.c:172(my_print_stacktrace)[0x80d32421]
      sql/signal_handler.cc:207(handle_fatal_signal)[0x80627a38]
      addr2line: '': No such file
      [0xb774ac14]
      [0xb774ac31]
      /lib/i386-linux-gnu/libc.so.6(gsignal+0x39)[0xb7028e89]
      /lib/i386-linux-gnu/libc.so.6(abort+0x157)[0xb702a3e7]
      ut/ut0new.cc:97(ut_new_boot())[0x80b17a22]
      include/ut0lst.h:335(void ut_list_remove<ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*>, GenericGetNode<mem_block_info_t> >(ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*>&, ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*>::node_type&, GenericGetNode<mem_block_info_t>))[0x809c00ed]
      include/ut0lst.h:386(void ut_list_remove<ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*> >(ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*>&, ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*>::elem_type*))[0x809c008f]
      mem/mem0mem.cc:418(mem_heap_block_free(mem_block_info_t*, mem_block_info_t*))[0x809bfe39]
      include/mem0mem.ic:416(mem_heap_free(mem_block_info_t*))[0x80bd83aa]
      dict/dict0mem.cc:233(dict_mem_table_free(dict_table_t*))[0x80bd926c]
      btr/btr0sea.cc:265(btr_search_lazy_free(dict_index_t*))[0x80b5c5f0]
      btr/btr0sea.cc:1252(btr_search_drop_page_hash_index(buf_block_t*))[0x80b5e97d]
      buf/buf0lru.cc:1615(buf_LRU_free_page(buf_page_t*, bool))[0x80b9d060]
      buf/buf0lru.cc:698(buf_LRU_free_from_common_LRU_list(buf_pool_t*, bool))[0x80b9a96f]
      buf/buf0lru.cc:740(buf_LRU_scan_and_free_block(buf_pool_t*, bool))[0x80b9ac02]
      buf/buf0lru.cc:970(buf_LRU_get_free_block(buf_pool_t*))[0x80b9b6f0]
      buf/buf0buf.cc:5289(buf_page_init_for_read(dberr_t*, unsigned int, page_id_t, page_size_t const&, bool))[0x80b7ab6c]
      buf/buf0rea.cc:153(buf_read_page_low(dberr_t*, bool, unsigned int, unsigned int, page_id_t, page_size_t const&, bool, bool))[0x80ba0fec]
      buf/buf0rea.cc:414(buf_read_page(page_id_t, page_size_t const&))[0x80ba1bac]
      buf/buf0buf.cc:4315(buf_page_get_low(page_id_t, page_size_t const&, unsigned int, buf_block_t*, unsigned int, char const*, unsigned int, mtr_t*, dberr_t*))[0x80b780d5]
      buf/buf0buf.cc:4836(buf_page_get_gen(page_id_t, page_size_t const&, unsigned int, buf_block_t*, unsigned int, char const*, unsigned int, mtr_t*, dberr_t*))[0x80b79707]
      include/trx0rseg.ic:52(trx_rsegf_get(unsigned int, unsigned int, mtr_t*))[0x80adfc8a]
      trx/trx0purge.cc:454(trx_purge_truncate_rseg_history(trx_rseg_t*, purge_iter_t const*))[0x80ae0d59]
      trx/trx0purge.cc:1143(trx_purge_truncate_history(purge_iter_t*, ReadView const*))[0x80ae315a]
      trx/trx0purge.cc:1765(trx_purge(unsigned int, unsigned int, bool, srv_slot_t*))[0x80ae49ef]
      srv/srv0srv.cc:2737(srv_do_purge(unsigned int*, srv_slot_t*))[0x80ab5e67]
      srv/srv0srv.cc:2883(srv_purge_coordinator_thread)[0x80ab6397]
      /lib/i386-linux-gnu/libpthread.so.0(+0x62b5)[0xb73a32b5]
      /lib/i386-linux-gnu/libc.so.6(clone+0x6e)[0xb70e416e]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x0): (null)
      Connection ID (thread ID): 1
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on
       
      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 /dev/shm/var_auto_0rA4/3/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             48287                48287                processes 
      Max open files            1024                 1024                 files     
      Max locked memory         65536                65536                bytes     
      Max address space         unlimited            unlimited            bytes     
      Max file locks            unlimited            unlimited            locks     
      Max pending signals       48287                48287                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 %P
       
      ----------SERVER LOG END-------------
       
       
       - found 'core' (0/0)
       
      Trying 'dbx' to get a backtrace
       
      Trying 'gdb' to get a backtrace from coredump /mnt/buildbot/build/mariadb-10.2.37/mysql-test/var/3/log/innodb.innodb-ucs2-innodb/mysqld.1/data/core
      Core generated by '/mnt/buildbot/build/mariadb-10.2.37/sql/mysqld'
      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 9421]
      [New LWP 9401]
      [New LWP 9412]
      [New LWP 9392]
      [New LWP 9422]
      [New LWP 9428]
      [New LWP 9399]
      [New LWP 9424]
      [New LWP 9427]
      [New LWP 9400]
      [New LWP 9426]
      [New LWP 9432]
      [New LWP 9398]
      [New LWP 9905]
      [New LWP 9402]
      [New LWP 9524]
      [New LWP 9523]
      [New LWP 9435]
      [New LWP 9413]
      [New LWP 9411]
      [New LWP 9406]
      [New LWP 9405]
      [New LWP 9429]
      [New LWP 9425]
      [New LWP 9423]
      [New LWP 9420]
      [New LWP 9419]
      [New LWP 9418]
      [New LWP 9404]
      [New LWP 9403]
      [Thread debugging using libthread_db enabled]
      Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
      Core was generated by `/mnt/buildbot/build/mariadb-10.2.37/sql/mysqld --defaults-group-suffix=.1 --def'.
      Program terminated with signal SIGABRT, Aborted.
      #0  0xb774ac31 in __kernel_vsyscall ()
      [Current thread is 1 (Thread 0xa93f4b40 (LWP 9421))]
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a9ce1 in pthread_kill () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d3251b in my_write_core (sig=6) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/stacktrace.c:382
      #3  0x80627de8 in handle_fatal_signal (sig=6) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/signal_handler.cc:343
      #4  <signal handler called>
      #5  0xb774ac31 in __kernel_vsyscall ()
      #6  0xb7028e89 in raise () from /lib/i386-linux-gnu/libc.so.6
      #7  0xb702a3e7 in abort () from /lib/i386-linux-gnu/libc.so.6
      #8  0x80b17a22 in ut_dbg_assertion_failed (expr=0x80f7d111 "list.count > 0", file=0x80f7d08c "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ut0lst.h", line=334) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/ut/ut0dbg.cc:60
      #9  0x809c00ed in ut_list_remove<ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*>, GenericGetNode<mem_block_info_t> > (list=..., node=..., get_node=...) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ut0lst.h:334
      #10 0x809c008f in ut_list_remove<ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*> > (list=..., elem=0xb1036148) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ut0lst.h:386
      #11 0x809bfe39 in mem_heap_block_free (heap=0xb1036148, block=0xb1036148) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/mem/mem0mem.cc:418
      #12 0x80bd83aa in mem_heap_free (heap=0xb1036148) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/mem0mem.ic:416
      #13 0x80bd926c in dict_mem_table_free (table=0xb103e878) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/dict/dict0mem.cc:233
      #14 0x80b5c5f0 in btr_search_lazy_free (index=0xb1078c30) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/btr/btr0sea.cc:265
      #15 0x80b5e97d in btr_search_drop_page_hash_index (block=0xb03fc0d0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/btr/btr0sea.cc:1252
      #16 0x80b9d060 in buf_LRU_free_page (bpage=0xb03fc0d0, zip=true) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:1615
      #17 0x80b9a96f in buf_LRU_free_from_common_LRU_list (buf_pool=0x83ede1e8, scan_all=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:698
      #18 0x80b9ac02 in buf_LRU_scan_and_free_block (buf_pool=0x83ede1e8, scan_all=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:740
      #19 0x80b9b6f0 in buf_LRU_get_free_block (buf_pool=0x83ede1e8) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:970
      #20 0x80b7ab6c in buf_page_init_for_read (err=0xa93f39bc, mode=132, page_id=..., page_size=..., unzip=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0buf.cc:5289
      #21 0x80ba0fec in buf_read_page_low (err=0xa93f39bc, sync=true, type=0, mode=132, page_id=..., page_size=..., unzip=false, ignore_missing_space=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0rea.cc:153
      #22 0x80ba1bac in buf_read_page (page_id=..., page_size=...) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0rea.cc:414
      #23 0x80b780d5 in buf_page_get_low (page_id=..., page_size=..., rw_latch=2, guess=0x0, mode=10, file=0x81000424 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/trx0rseg.ic", line=52, mtr=0xa93f3d18, err=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0buf.cc:4315
      #24 0x80b79707 in buf_page_get_gen (page_id=..., page_size=..., rw_latch=2, guess=0x0, mode=10, file=0x81000424 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/trx0rseg.ic", line=52, mtr=0xa93f3d18, err=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0buf.cc:4836
      #25 0x80adfc8a in trx_rsegf_get (space=0, page_no=277, mtr=0xa93f3d18) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/trx0rseg.ic:52
      #26 0x80ae0d59 in trx_purge_truncate_rseg_history (rseg=0x83fe9628, limit=0x83fd4c68) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0purge.cc:454
      #27 0x80ae315a in trx_purge_truncate_history (limit=0x83fd4c68, view=0x83fd4bdc) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0purge.cc:1143
      #28 0x80ae49ef in trx_purge (n_purge_threads=4, batch_size=300, truncate=true, slot=0x814db43c <srv_sys+188>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0purge.cc:1765
      #29 0x80ab5e67 in srv_do_purge (n_total_purged=0xa93f4280, slot=0x814db43c <srv_sys+188>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2737
      #30 0x80ab6397 in srv_purge_coordinator_thread (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2883
      #31 0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #32 0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 30 (Thread 0xae7c1b40 (LWP 9403)):
      #0  0xb7716570 in ?? () from /lib/i386-linux-gnu/libaio.so.1
      #1  0xb77165e6 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1
      #2  0x809c8e7d in LinuxAIOHandler::collect (this=0xae7c10f0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:1936
      #3  0x809c948f in LinuxAIOHandler::poll (this=0xae7c10f0, m1=0xae7c1154, m2=0xae7c1158, request=0xae7c1178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2097
      #4  0x809c95f3 in os_aio_linux_handler (global_segment=3, m1=0xae7c1154, m2=0xae7c1158, request=0xae7c1178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2151
      #5  0x809ce63b in os_aio_handler (segment=3, m1=0xae7c1154, m2=0xae7c1158, request=0xae7c1178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:5784
      #6  0x80c01e05 in fil_aio_wait (segment=3) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/fil/fil0fil.cc:5116
      #7  0x80ab88ec in io_handler_thread (arg=0x81eddc6c <n+12>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0start.cc:332
      #8  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #9  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 29 (Thread 0xadfc0b40 (LWP 9404)):
      #0  0xb7716570 in ?? () from /lib/i386-linux-gnu/libaio.so.1
      #1  0xb77165e6 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1
      #2  0x809c8e7d in LinuxAIOHandler::collect (this=0xadfc00f0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:1936
      #3  0x809c948f in LinuxAIOHandler::poll (this=0xadfc00f0, m1=0xadfc0154, m2=0xadfc0158, request=0xadfc0178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2097
      #4  0x809c95f3 in os_aio_linux_handler (global_segment=4, m1=0xadfc0154, m2=0xadfc0158, request=0xadfc0178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2151
      #5  0x809ce63b in os_aio_handler (segment=4, m1=0xadfc0154, m2=0xadfc0158, request=0xadfc0178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:5784
      #6  0x80c01e05 in fil_aio_wait (segment=4) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/fil/fil0fil.cc:5116
      #7  0x80ab88ec in io_handler_thread (arg=0x81eddc70 <n+16>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0start.cc:332
      #8  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #9  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 28 (Thread 0xac3fab40 (LWP 9418)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73ac8aa in nanosleep () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d73a2 in os_thread_sleep (tm=1000000) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0thread.cc:231
      #3  0x80ab53fe in srv_master_sleep () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2422
      #4  0x80ab552e in srv_master_thread (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2462
      #5  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #6  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 27 (Thread 0xaa3f6b40 (LWP 9419)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d6882 in os_event::timed_wait (this=0x83fa7af0, abstime=0xaa3f6238) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:275
      #3  0x809d6b93 in os_event::wait_time_low (this=0x83fa7af0, time_in_usec=10000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:385
      #4  0x809d6d91 in os_event_wait_time_low (event=0x83fa7af0, time_in_usec=10000000, reset_sig_count=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:490
      #5  0x80beb36c in dict_stats_thread () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/dict/dict0stats_bg.cc:475
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 26 (Thread 0xa9bf5b40 (LWP 9420)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d6882 in os_event::timed_wait (this=0x83ff2b18, abstime=0xa9bf50f8) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:275
      #3  0x809d6b93 in os_event::wait_time_low (this=0x83ff2b18, time_in_usec=5000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:385
      #4  0x809d6d91 in os_event_wait_time_low (event=0x83ff2b18, time_in_usec=5000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:490
      #5  0x80b1abdf in ib_wqueue_timedwait (wq=0x83ff2a30, wait_in_usecs=5000000) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/ut/ut0wqueue.cc:156
      #6  0x80c410bc in fts_optimize_thread (arg=0x83ff2a30) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/fts/fts0opt.cc:2829
      #7  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #8  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 25 (Thread 0xa83f2b40 (LWP 9423)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d701c in os_event::wait (this=0x83e24730) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:158
      #3  0x809d6a55 in os_event::wait_low (this=0x83e24730, reset_sig_count=298) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:325
      #4  0x809d6dc3 in os_event_wait_low (event=0x83e24730, reset_sig_count=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:507
      #5  0x80ab1c3b in srv_resume_thread (slot=0x814db474 <srv_sys+244>, sig_count=0, wait=true, timeout_usec=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:940
      #6  0x80ab5b4d in srv_worker_thread (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2620
      #7  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #8  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 24 (Thread 0xa6fffb40 (LWP 9425)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d701c in os_event::wait (this=0x83e248b0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:158
      #3  0x809d6a55 in os_event::wait_low (this=0x83e248b0, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:325
      #4  0x809d6dc3 in os_event_wait_low (event=0x83e248b0, reset_sig_count=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:507
      #5  0x80b8a6b4 in buf_dump_thread () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0dump.cc:806
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 23 (Thread 0xb01c5b40 (LWP 9429)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73ad1cd in do_sigwait () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0xb73ad25e in sigwait () from /lib/i386-linux-gnu/libpthread.so.0
      #3  0x802d8a27 in signal_hand (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:3559
      #4  0x80829aee in pfs_spawn_thread (arg=0x84013d50) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #5  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #6  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 22 (Thread 0xad7bfb40 (LWP 9405)):
      #0  0xb7716570 in ?? () from /lib/i386-linux-gnu/libaio.so.1
      #1  0xb77165e6 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1
      #2  0x809c8e7d in LinuxAIOHandler::collect (this=0xad7bf0f0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:1936
      #3  0x809c948f in LinuxAIOHandler::poll (this=0xad7bf0f0, m1=0xad7bf154, m2=0xad7bf158, request=0xad7bf178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2097
      #4  0x809c95f3 in os_aio_linux_handler (global_segment=5, m1=0xad7bf154, m2=0xad7bf158, request=0xad7bf178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2151
      #5  0x809ce63b in os_aio_handler (segment=5, m1=0xad7bf154, m2=0xad7bf158, request=0xad7bf178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:5784
      #6  0x80c01e05 in fil_aio_wait (segment=5) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/fil/fil0fil.cc:5116
      #7  0x80ab88ec in io_handler_thread (arg=0x81eddc74 <n+20>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0start.cc:332
      #8  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #9  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 21 (Thread 0xacfbeb40 (LWP 9406)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d6882 in os_event::timed_wait (this=0x83e24910, abstime=0xacfbe078) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:275
      #3  0x809d6b93 in os_event::wait_time_low (this=0x83e24910, time_in_usec=974000, reset_sig_count=128) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:385
      #4  0x809d6d91 in os_event_wait_time_low (event=0x83e24910, time_in_usec=974000, reset_sig_count=128) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:490
      #5  0x80b94482 in pc_sleep_if_needed (next_loop_time=3222740, sig_count=128, cur_time=3221766) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0flu.cc:2683
      #6  0x80b9530a in buf_flush_page_cleaner_coordinator () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0flu.cc:3149
      #7  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #8  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 20 (Thread 0xabbf9b40 (LWP 9411)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d6882 in os_event::timed_wait (this=0x83f7e8f0, abstime=0xabbf9218) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:275
      #3  0x809d6b93 in os_event::wait_time_low (this=0x83f7e8f0, time_in_usec=1000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:385
      #4  0x809d6d91 in os_event_wait_time_low (event=0x83f7e8f0, time_in_usec=1000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:490
      #5  0x809a140b in lock_wait_timeout_thread () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/lock/lock0wait.cc:525
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 19 (Thread 0xaabf7b40 (LWP 9413)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d6882 in os_event::timed_wait (this=0x83e24850, abstime=0xaabf7208) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:275
      #3  0x809d6b93 in os_event::wait_time_low (this=0x83e24850, time_in_usec=5000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:385
      #4  0x809d6d91 in os_event_wait_time_low (event=0x83e24850, time_in_usec=5000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:490
      #5  0x80ab39a5 in srv_monitor_thread () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:1751
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 18 (Thread 0xac7bdb40 (LWP 9435)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d3734d in safe_cond_timedwait (cond=0x8167f000 <COND_thread_cache>, mp=0x81680f40 <LOCK_thread_cache>, abstime=0xac7bd17c, file=0x80db9da0 "/home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h", line=1182) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_mutex.c:545
      #3  0x802d2df0 in inline_mysql_cond_timedwait (that=0x8167f000 <COND_thread_cache>, mutex=0x81680f40 <LOCK_thread_cache>, abstime=0xac7bd17c, src_file=0x80dbbbdc "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc", src_line=3023) at /home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h:1182
      #4  0x802d7c3a in cache_thread (thd=0x840abc70) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:3022
      #5  0x802d7ec5 in one_thread_per_connection_end (thd=0x840abc70, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:3111
      #6  0x80503b85 in do_handle_one_connection (connect=0x840725c8) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1355
      #7  0x805037f8 in handle_one_connection (arg=0x840725c8) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1241
      #8  0x80829aee in pfs_spawn_thread (arg=0x840abc70) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #9  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #10 0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 17 (Thread 0xac773b40 (LWP 9523)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d701c in os_event::wait (this=0x83fe96f0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:158
      #3  0x809d6a55 in os_event::wait_low (this=0x83fe96f0, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:325
      #4  0x809d6dc3 in os_event_wait_low (event=0x83fe96f0, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:507
      #5  0x80ac28d2 in sync_array_wait_event (arr=0x83e0a8c8, cell=@0xac771768: 0x83e0a988) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/sync/sync0arr.cc:471
      #6  0x8093d5b8 in TTASEventMutex<GenericPolicy>::enter (this=0x83fe962c, max_spins=60, max_delay=4, filename=0x8100d26c "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0trx.cc", line=1142) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ib0mutex.h:516
      #7  0x8093b91e in PolicyMutex<TTASEventMutex<GenericPolicy> >::enter (this=0x83fe962c, n_spins=30, n_delay=4, name=0x8100d26c "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0trx.cc", line=1142) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ib0mutex.h:637
      #8  0x80b048d4 in trx_assign_rseg_low () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0trx.cc:1142
      #9  0x80b04fd5 in trx_start_low (trx=0xb0bffcf8, read_write=true) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0trx.cc:1268
      #10 0x80b096f0 in trx_start_if_not_started_xa_low (trx=0xb0bffcf8, read_write=true) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0trx.cc:2882
      #11 0x80a4ff57 in row_insert_for_mysql (mysql_rec=0xac678c30 "\374\004", prebuilt=0xac672fa0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/row/row0mysql.cc:1386
      #12 0x8091daf9 in ha_innobase::write_row (this=0xac680088, record=0xac678c30 "\374\004") at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/handler/ha_innodb.cc:8179
      #13 0x806366f7 in handler::ha_write_row (this=0xac680088, buf=0xac678c30 "\374\004") at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/handler.cc:6116
      #14 0x803a439c in write_record (thd=0xac6016f8, table=0xac672618, info=0xac771dac) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_insert.cc:1939
      #15 0x803a2146 in mysql_insert (thd=0xac6016f8, table_list=0xac61c230, fields=..., values_list=..., update_fields=..., update_values=..., duplic=DUP_ERROR, ignore=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_insert.cc:1066
      #16 0x803c7e9a in mysql_execute_command (thd=0xac6016f8) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_parse.cc:4193
      #17 0x803eee0f in Prepared_statement::execute (this=0xac60dd58, expanded_query=0xac7729bc, open_cursor=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_prepare.cc:5027
      #18 0x803ed60e in Prepared_statement::execute_loop (this=0xac60dd58, expanded_query=0xac7729bc, open_cursor=false, packet=0xac605c62 "", packet_end=0xac605c62 "") at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_prepare.cc:4456
      #19 0x803eb344 in mysql_stmt_execute_common (thd=0xac6016f8, stmt_id=120, packet=0xac605c62 "", packet_end=0xac605c62 "", cursor_flags=0, bulk_op=false, read_types=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_prepare.cc:3458
      #20 0x803ead9f in mysqld_stmt_execute (thd=0xac6016f8, packet_arg=0xac605c59 "x", packet_length=9) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_prepare.cc:3249
      #21 0x803c0c2b in dispatch_command (command=COM_STMT_EXECUTE, thd=0xac6016f8, packet=0xac605c59 "x", packet_length=9, is_com_multi=false, is_next_command=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_parse.cc:1770
      #22 0x803bf976 in do_command (thd=0xac6016f8) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_parse.cc:1382
      #23 0x80503a98 in do_handle_one_connection (connect=0x8410f6c0) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1336
      #24 0x805037f8 in handle_one_connection (arg=0x8410f6c0) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1241
      #25 0x80829aee in pfs_spawn_thread (arg=0x840cb288) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #26 0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #27 0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 16 (Thread 0xa73f0b40 (LWP 9524)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d3734d in safe_cond_timedwait (cond=0x8167f000 <COND_thread_cache>, mp=0x81680f40 <LOCK_thread_cache>, abstime=0xa73f017c, file=0x80db9da0 "/home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h", line=1182) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_mutex.c:545
      #3  0x802d2df0 in inline_mysql_cond_timedwait (that=0x8167f000 <COND_thread_cache>, mutex=0x81680f40 <LOCK_thread_cache>, abstime=0xa73f017c, src_file=0x80dbbbdc "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc", src_line=3023) at /home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h:1182
      #4  0x802d7c3a in cache_thread (thd=0xb1001958) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:3022
      #5  0x802d7ec5 in one_thread_per_connection_end (thd=0xb1001958, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:3111
      #6  0x80503b85 in do_handle_one_connection (connect=0x8410f6c0) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1355
      #7  0x805037f8 in handle_one_connection (arg=0x8410f6c0) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1241
      #8  0x80829aee in pfs_spawn_thread (arg=0x840c8440) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #9  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #10 0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 15 (Thread 0xaefc2b40 (LWP 9402)):
      #0  0xb7716570 in ?? () from /lib/i386-linux-gnu/libaio.so.1
      #1  0xb77165e6 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1
      #2  0x809c8e7d in LinuxAIOHandler::collect (this=0xaefc20f0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:1936
      #3  0x809c948f in LinuxAIOHandler::poll (this=0xaefc20f0, m1=0xaefc2154, m2=0xaefc2158, request=0xaefc2178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2097
      #4  0x809c95f3 in os_aio_linux_handler (global_segment=2, m1=0xaefc2154, m2=0xaefc2158, request=0xaefc2178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2151
      #5  0x809ce63b in os_aio_handler (segment=2, m1=0xaefc2154, m2=0xaefc2158, request=0xaefc2178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:5784
      #6  0x80c01e05 in fil_aio_wait (segment=2) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/fil/fil0fil.cc:5116
      #7  0x80ab88ec in io_handler_thread (arg=0x81eddc68 <n+8>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0start.cc:332
      #8  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #9  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 14 (Thread 0xa73a6b40 (LWP 9905)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d3734d in safe_cond_timedwait (cond=0x8167f000 <COND_thread_cache>, mp=0x81680f40 <LOCK_thread_cache>, abstime=0xa73a617c, file=0x80db9da0 "/home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h", line=1182) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_mutex.c:545
      #3  0x802d2df0 in inline_mysql_cond_timedwait (that=0x8167f000 <COND_thread_cache>, mutex=0x81680f40 <LOCK_thread_cache>, abstime=0xa73a617c, src_file=0x80dbbbdc "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc", src_line=3023) at /home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h:1182
      #4  0x802d7c3a in cache_thread (thd=0xb240f888) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:3022
      #5  0x802d7ec5 in one_thread_per_connection_end (thd=0xb240f888, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:3111
      #6  0x80503b85 in do_handle_one_connection (connect=0x840c8658) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1355
      #7  0x805037f8 in handle_one_connection (arg=0x840c8658) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_connect.cc:1241
      #8  0x80829aee in pfs_spawn_thread (arg=0x841391b8) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #9  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #10 0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 13 (Thread 0xb2d59b40 (LWP 9398)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d3734d in safe_cond_timedwait (cond=0x81ef2060 <COND_timer>, mp=0x81ef1fe0 <LOCK_timer>, abstime=0xb2d59250, file=0x810b9df8 "/home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h", line=1182) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_mutex.c:545
      #3  0x80d3820a in inline_mysql_cond_timedwait (that=0x81ef2060 <COND_timer>, mutex=0x81ef1fe0 <LOCK_timer>, abstime=0xb2d59250, src_file=0x810b9e48 "/home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_timer.c", src_line=292) at /home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h:1182
      #4  0x80d38d2e in timer_handler (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_timer.c:292
      #5  0x80829aee in pfs_spawn_thread (arg=0x83d48ad8) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 12 (Thread 0xb017bb40 (LWP 9432)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d370a2 in safe_cond_wait (cond=0x8167f040 <COND_slave_background>, mp=0x81681640 <LOCK_slave_background>, file=0x80dc7c20 "/home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h", line=1145) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_mutex.c:491
      #3  0x803012dc in inline_mysql_cond_wait (that=0x8167f040 <COND_slave_background>, mutex=0x81681640 <LOCK_slave_background>, src_file=0x80dc85c8 "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/slave.cc", src_line=337) at /home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h:1145
      #4  0x80301f0b in handle_slave_background (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/slave.cc:337
      #5  0x80829aee in pfs_spawn_thread (arg=0x8405a368) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 11 (Thread 0xa67feb40 (LWP 9426)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73ac8aa in nanosleep () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d73a2 in os_thread_sleep (tm=1000000) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0thread.cc:231
      #3  0x80b66ffb in btr_defragment_thread () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/btr/btr0defragment.cc:710
      #4  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #5  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 10 (Thread 0xaffc4b40 (LWP 9400)):
      #0  0xb7716570 in ?? () from /lib/i386-linux-gnu/libaio.so.1
      #1  0xb77165e6 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1
      #2  0x809c8e7d in LinuxAIOHandler::collect (this=0xaffc40f0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:1936
      #3  0x809c948f in LinuxAIOHandler::poll (this=0xaffc40f0, m1=0xaffc4154, m2=0xaffc4158, request=0xaffc4178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2097
      #4  0x809c95f3 in os_aio_linux_handler (global_segment=0, m1=0xaffc4154, m2=0xaffc4158, request=0xaffc4178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2151
      #5  0x809ce63b in os_aio_handler (segment=0, m1=0xaffc4154, m2=0xaffc4158, request=0xaffc4178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:5784
      #6  0x80c01e05 in fil_aio_wait (segment=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/fil/fil0fil.cc:5116
      #7  0x80ab88ec in io_handler_thread (arg=0x81eddc60 <n>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0start.cc:332
      #8  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #9  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 9 (Thread 0xa5ffdb40 (LWP 9427)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d701c in os_event::wait (this=0x83e24970) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:158
      #3  0x809d6a55 in os_event::wait_low (this=0x83e24970, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:325
      #4  0x809d6dc3 in os_event_wait_low (event=0x83e24970, reset_sig_count=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:507
      #5  0x80b74c49 in buf_resize_thread () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0buf.cc:3109
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 8 (Thread 0xa7bf1b40 (LWP 9424)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d701c in os_event::wait (this=0x83e24790) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:158
      #3  0x809d6a55 in os_event::wait_low (this=0x83e24790, reset_sig_count=301) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:325
      #4  0x809d6dc3 in os_event_wait_low (event=0x83e24790, reset_sig_count=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:507
      #5  0x80ab1c3b in srv_resume_thread (slot=0x814db490 <srv_sys+272>, sig_count=0, wait=true, timeout_usec=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:940
      #6  0x80ab5b4d in srv_worker_thread (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2620
      #7  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #8  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 7 (Thread 0xb1920b40 (LWP 9399)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d3734d in safe_cond_timedwait (cond=0x81ea8cc0 <COND_checkpoint>, mp=0x81ea8c40 <LOCK_checkpoint>, abstime=0xb192019c, file=0x80f34d84 "/home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h", line=1182) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_mutex.c:545
      #3  0x80884dd1 in inline_mysql_cond_timedwait (that=0x81ea8cc0 <COND_checkpoint>, mutex=0x81ea8c40 <LOCK_checkpoint>, abstime=0xb192019c, src_file=0x80f34dd4 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/maria/ma_servicethread.c", src_line=116) at /home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h:1182
      #4  0x808852f4 in my_service_thread_sleep (control=0x814d2878 <checkpoint_control>, sleep_time=29000000000) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/maria/ma_servicethread.c:115
      #5  0x80879818 in ma_checkpoint_background (arg=0x1e) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/maria/ma_checkpoint.c:709
      #6  0x80829aee in pfs_spawn_thread (arg=0x83d82778) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #7  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #8  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 6 (Thread 0xa57fcb40 (LWP 9428)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d370a2 in safe_cond_wait (cond=0xa57fc1c4, mp=0xa57fc1f8, file=0x80f41d20 "/home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h", line=1156) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_mutex.c:491
      #3  0x8090c79f in inline_mysql_cond_wait (that=0xa57fc1c4, mutex=0xa57fc1f8, src_file=0x80f439a8 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/handler/ha_innodb.cc", src_line=350) at /home/buildbot/buildbot/build/mariadb-10.2.37/include/mysql/psi/mysql_thread.h:1156
      #4  0x809109d6 in thd_destructor_proxy () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/handler/ha_innodb.cc:350
      #5  0x80829aee in pfs_spawn_thread (arg=0x83ff8978) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/perfschema/pfs.cc:1869
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 5 (Thread 0xa8bf3b40 (LWP 9422)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d701c in os_event::wait (this=0x83e246d0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:158
      #3  0x809d6a55 in os_event::wait_low (this=0x83e246d0, reset_sig_count=410) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:325
      #4  0x809d6dc3 in os_event_wait_low (event=0x83e246d0, reset_sig_count=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:507
      #5  0x80ab1c3b in srv_resume_thread (slot=0x814db458 <srv_sys+216>, sig_count=0, wait=true, timeout_usec=0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:940
      #6  0x80ab5b4d in srv_worker_thread (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2620
      #7  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #8  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 4 (Thread 0xb6e6a7c0 (LWP 9392)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb70d9f8f in poll () from /lib/i386-linux-gnu/libc.so.6
      #2  0x802deff3 in handle_connections_sockets () at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:6718
      #3  0x802de300 in mysqld_main (argc=144, argv=0x83c28068) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc:6186
      #4  0x802d261b in main (argc=22, argv=0xbfe9f574) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/main.cc:25
       
      Thread 3 (Thread 0xab3f8b40 (LWP 9412)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a8e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x809d6882 in os_event::timed_wait (this=0x83e247f0, abstime=0xab3f8118) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:275
      #3  0x809d6b93 in os_event::wait_time_low (this=0x83e247f0, time_in_usec=1000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:385
      #4  0x809d6d91 in os_event_wait_time_low (event=0x83e247f0, time_in_usec=1000000, reset_sig_count=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0event.cc:490
      #5  0x80ab3ef1 in srv_error_monitor_thread () at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:1915
      #6  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 2 (Thread 0xaf7c3b40 (LWP 9401)):
      #0  0xb7716570 in ?? () from /lib/i386-linux-gnu/libaio.so.1
      #1  0xb77165e6 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1
      #2  0x809c8e7d in LinuxAIOHandler::collect (this=0xaf7c30f0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:1936
      #3  0x809c948f in LinuxAIOHandler::poll (this=0xaf7c30f0, m1=0xaf7c3154, m2=0xaf7c3158, request=0xaf7c3178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2097
      #4  0x809c95f3 in os_aio_linux_handler (global_segment=1, m1=0xaf7c3154, m2=0xaf7c3158, request=0xaf7c3178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:2151
      #5  0x809ce63b in os_aio_handler (segment=1, m1=0xaf7c3154, m2=0xaf7c3158, request=0xaf7c3178) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/os/os0file.cc:5784
      #6  0x80c01e05 in fil_aio_wait (segment=1) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/fil/fil0fil.cc:5116
      #7  0x80ab88ec in io_handler_thread (arg=0x81eddc64 <n+4>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0start.cc:332
      #8  0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #9  0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 1 (Thread 0xa93f4b40 (LWP 9421)):
      #0  0xb774ac31 in __kernel_vsyscall ()
      #1  0xb73a9ce1 in pthread_kill () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x80d3251b in my_write_core (sig=6) at /home/buildbot/buildbot/build/mariadb-10.2.37/mysys/stacktrace.c:382
      #3  0x80627de8 in handle_fatal_signal (sig=6) at /home/buildbot/buildbot/build/mariadb-10.2.37/sql/signal_handler.cc:343
      #4  <signal handler called>
      #5  0xb774ac31 in __kernel_vsyscall ()
      #6  0xb7028e89 in raise () from /lib/i386-linux-gnu/libc.so.6
      #7  0xb702a3e7 in abort () from /lib/i386-linux-gnu/libc.so.6
      #8  0x80b17a22 in ut_dbg_assertion_failed (expr=0x80f7d111 "list.count > 0", file=0x80f7d08c "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ut0lst.h", line=334) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/ut/ut0dbg.cc:60
      #9  0x809c00ed in ut_list_remove<ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*>, GenericGetNode<mem_block_info_t> > (list=..., node=..., get_node=...) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ut0lst.h:334
      #10 0x809c008f in ut_list_remove<ut_list_base<mem_block_info_t, ut_list_node<mem_block_info_t> mem_block_info_t::*> > (list=..., elem=0xb1036148) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/ut0lst.h:386
      #11 0x809bfe39 in mem_heap_block_free (heap=0xb1036148, block=0xb1036148) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/mem/mem0mem.cc:418
      #12 0x80bd83aa in mem_heap_free (heap=0xb1036148) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/mem0mem.ic:416
      #13 0x80bd926c in dict_mem_table_free (table=0xb103e878) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/dict/dict0mem.cc:233
      #14 0x80b5c5f0 in btr_search_lazy_free (index=0xb1078c30) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/btr/btr0sea.cc:265
      #15 0x80b5e97d in btr_search_drop_page_hash_index (block=0xb03fc0d0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/btr/btr0sea.cc:1252
      #16 0x80b9d060 in buf_LRU_free_page (bpage=0xb03fc0d0, zip=true) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:1615
      #17 0x80b9a96f in buf_LRU_free_from_common_LRU_list (buf_pool=0x83ede1e8, scan_all=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:698
      #18 0x80b9ac02 in buf_LRU_scan_and_free_block (buf_pool=0x83ede1e8, scan_all=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:740
      #19 0x80b9b6f0 in buf_LRU_get_free_block (buf_pool=0x83ede1e8) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0lru.cc:970
      #20 0x80b7ab6c in buf_page_init_for_read (err=0xa93f39bc, mode=132, page_id=..., page_size=..., unzip=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0buf.cc:5289
      #21 0x80ba0fec in buf_read_page_low (err=0xa93f39bc, sync=true, type=0, mode=132, page_id=..., page_size=..., unzip=false, ignore_missing_space=false) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0rea.cc:153
      #22 0x80ba1bac in buf_read_page (page_id=..., page_size=...) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0rea.cc:414
      #23 0x80b780d5 in buf_page_get_low (page_id=..., page_size=..., rw_latch=2, guess=0x0, mode=10, file=0x81000424 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/trx0rseg.ic", line=52, mtr=0xa93f3d18, err=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0buf.cc:4315
      #24 0x80b79707 in buf_page_get_gen (page_id=..., page_size=..., rw_latch=2, guess=0x0, mode=10, file=0x81000424 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/trx0rseg.ic", line=52, mtr=0xa93f3d18, err=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/buf/buf0buf.cc:4836
      #25 0x80adfc8a in trx_rsegf_get (space=0, page_no=277, mtr=0xa93f3d18) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/include/trx0rseg.ic:52
      #26 0x80ae0d59 in trx_purge_truncate_rseg_history (rseg=0x83fe9628, limit=0x83fd4c68) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0purge.cc:454
      #27 0x80ae315a in trx_purge_truncate_history (limit=0x83fd4c68, view=0x83fd4bdc) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0purge.cc:1143
      #28 0x80ae49ef in trx_purge (n_purge_threads=4, batch_size=300, truncate=true, slot=0x814db43c <srv_sys+188>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/trx/trx0purge.cc:1765
      #29 0x80ab5e67 in srv_do_purge (n_total_purged=0xa93f4280, slot=0x814db43c <srv_sys+188>) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2737
      #30 0x80ab6397 in srv_purge_coordinator_thread (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/srv/srv0srv.cc:2883
      #31 0xb73a32b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #32 0xb70e416e in clone () from /lib/i386-linux-gnu/libc.so.6
       
       - deleting it, already saved 0
       - saving '/mnt/buildbot/build/mariadb-10.2.37/mysql-test/var/3/log/innodb.innodb-ucs2-innodb/' to '/mnt/buildbot/build/mariadb-10.2.37/mysql-test/var/log/innodb.innodb-ucs2-innodb/'
       
      Retrying test innodb.innodb-ucs2, attempt(2/3)...
      

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              Assignee:
              marko Marko Mäkelä
              Reporter:
              alice Alice Sherepa
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                Created:
                Updated: