#3  <signal handler called>

#4  0x0000000000aea2fc in fetch_data_into_cache_low (cache=0x1d78e00, only_ac_nl=1, trx_list=0x7f45248c53e0) at 10.0/storage/innobase/trx/trx0i_s.cc:1298

#5  0x0000000000aea7fb in fetch_data_into_cache (cache=0x1d78e00) at 10.0/storage/innobase/trx/trx0i_s.cc:1359

#6  0x0000000000aea8b8 in trx_i_s_possibly_fetch_data_into_cache (cache=0x1d78e00) at 10.0/storage/innobase/trx/trx0i_s.cc:1391

#7  0x0000000000a4b2fd in trx_i_s_common_fill_table (thd=0x7f4524b85710, tables=0x33c62a8) at 10.0/storage/innobase/handler/i_s.cc:1252

#8  0x0000000000698fba in do_fill_table (thd=0x7f4524b85710, table_list=0x33c62a8, join_table=0x7f450c28bdc0) at 10.0/sql/sql_show.cc:7579

#9  0x00000000006993cc in get_schema_tables_result (join=0x33c7570, executed_place=PROCESSED_BY_JOIN_EXEC) at 10.0/sql/sql_show.cc:7686

#10 0x0000000000644005 in JOIN::exec_inner (this=0x33c7570) at 10.0/sql/sql_select.cc:2408

#11 0x0000000000643669 in JOIN::exec (this=0x33c7570) at 10.0/sql/sql_select.cc:2251

#12 0x0000000000646baa in mysql_select (thd=0x7f4524b85710, rref_pointer_array=0x7f4524b88a68, tables=0x33c62a8, wild_num=1, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2684619520, result=0x33c7550, unit=0x7f4524b88130, select_lex=0x7f4524b88808) at 10.0/sql/sql_select.cc:3188

#13 0x000000000063d4a0 in handle_select (thd=0x7f4524b85710, lex=0x7f4524b88080, result=0x33c7550, setup_tables_done_option=0) at 10.0/sql/sql_select.cc:362

#14 0x0000000000615c64 in execute_sqlcom_select (thd=0x7f4524b85710, all_tables=0x33c62a8) at 10.0/sql/sql_parse.cc:4937

#15 0x000000000060e2da in mysql_execute_command (thd=0x7f4524b85710) at 10.0/sql/sql_parse.cc:2421

#16 0x0000000000618520 in mysql_parse (thd=0x7f4524b85710, rawbuf=0x33c6038 "SELECT * FROM INFORMATION_SCHEMA . `INNODB_LOCKS`", length=49, parser_state=0x7f452814d540) at 10.0/sql/sql_parse.cc:6056

#17 0x000000000060b4cc in dispatch_command (command=COM_QUERY, thd=0x7f4524b85710, packet=0x7f4524b8ace1 "SELECT * FROM INFORMATION_SCHEMA . `INNODB_LOCKS`", packet_length=49) at 10.0/sql/sql_parse.cc:1216

#18 0x000000000060a6c5 in do_command (thd=0x7f4524b85710) at 10.0/sql/sql_parse.cc:945

#19 0x000000000070efc0 in do_handle_one_connection (thd_arg=0x7f4524b85710) at 10.0/sql/sql_connect.cc:1254

#20 0x000000000070e990 in handle_one_connection (arg=0x7f4524b85710) at 10.0/sql/sql_connect.cc:1168

#21 0x00007f45329daefc in start_thread (arg=0x7f452814e700) at pthread_create.c:304

#22 0x00007f453218a59d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x33c6038): SELECT * FROM INFORMATION_SCHEMA . `INNODB_LOCKS`

Connection ID (thread ID): 9

Status: NOT_KILLED

revision-id: sergii@pisem.net-20121030171542-xbhcun8kfqykdy9l

date: 2012-10-30 18:15:42 +0100

revno: 3466

query:

        SELECT * FROM database . _table ;

thread1:

        ALTER TABLE A ADD COLUMN _letter INTEGER |

        ALTER TABLE A DROP COLUMN _letter ;

database:

        { $last_database = $prng->arrayElement(['INFORMATION_SCHEMA']); return $last_database };

perl ./gentest.pl --grammar=is.yy --queries=100M --duration=600 --threads=8 --dsn=dbi:mysql:host=127.0.0.1:port=3306:user=root:database=test --gendata