** Startup
/sda/Percona-Server-5.6.22-rel71.0-729.Linux.x86_64-debug/bin/mysqld --no-defaults --event-scheduler=ON --maximum-bulk_insert_buffer_size=1M --maximum-join_buffer_size=1M --maximum-max_heap_table_size=1M --maximum-max_join_size=1M --maximum-myisam_max_sort_file_size=1M --maximum-myisam_mmap_size=1M --maximum-myisam_sort_buffer_size=1M --maximum-optimizer_trace_max_mem_size=1M --maximum-preload_buffer_size=1M --maximum-query_alloc_block_size=1M --maximum-query_prealloc_size=1M --maximum-range_alloc_block_size=1M --maximum-read_buffer_size=1M --maximum-read_rnd_buffer_size=1M --maximum-sort_buffer_size=1M --maximum-tmp_table_size=1M --maximum-transaction_alloc_block_size=1M --maximum-transaction_prealloc_size=1M --log-output=none --sql_mode=ONLY_FULL_GROUP_BY --enforce_storage_engine=INNODB --basedir=/sda/Percona-Server-5.6.22-rel71.0-729.Linux.x86_64-debug --datadir=/dev/shm/012728/11247/data --tmpdir=/dev/shm/012728/11247/tmp
** GDB info
#0 0x00007f0f0e2d3771 in pthread_kill () from /lib64/libpthread.so.0
#1 0x0000000000ab978e in my_write_core (sig=6) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-7
1.0/mysys/stacktrace.c:422
#2 0x00000000007301a3 in handle_fatal_signal (sig=6) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.
6.22-71.0/sql/signal_handler.cc:236
#3 <signal handler called>
#4 0x00007f0f0ced75c9 in raise () from /lib64/libc.so.6
#5 0x00007f0f0ced8cd8 in abort () from /lib64/libc.so.6
#6 0x0000000000c52006 in trx_undo_report_row_operation (flags=0, op_type=1, thr=0x7f0eee95a998, index=0x7f0eee082678, clust_entry=0x7f0eea1b5a78, upd
ate=0x0, cmpl_info=0, rec=0x0, offsets=0x0, roll_ptr=0x7f0f0e8885b0) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/pe
rcona-server-5.6.22-71.0/storage/innobase/trx/trx0rec.cc:1242
#7 0x0000000000c9ac84 in btr_cur_ins_lock_and_undo (flags=0, cursor=0x7f0f0e888710, entry=0x7f0eea1b5a78, thr=0x7f0eee95a998, mtr=0x7f0f0e888790, inh
erit=0x7f0f0e888620) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/btr/bt
r0cur.cc:1274
#8 0x0000000000c9b3e7 in btr_cur_optimistic_insert (flags=0, cursor=0x7f0f0e888710, offsets=0x7f0f0e888c80, heap=0x7f0f0e888c70, entry=0x7f0eea1b5a78
, rec=0x7f0f0e888c68, big_rec=0x7f0f0e888c78, n_ext=0, thr=0x7f0eee95a998, mtr=0x7f0f0e888790) at /mnt/workspace/percona-server-5.6-binaries-debug-yas
sl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/btr/btr0cur.cc:1501
#9 0x0000000000bc23a3 in row_ins_clust_index_entry_low (flags=0, mode=2, index=0x7f0eee082678, n_uniq=0, entry=0x7f0eea1b5a78, n_ext=0, thr=0x7f0eee9
5a998) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/row/row0ins.cc:2493
#10 0x0000000000bc32e7 in row_ins_clust_index_entry (index=0x7f0eee082678, entry=0x7f0eea1b5a78, thr=0x7f0eee95a998, n_ext=0) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/row/row0ins.cc:2897
#11 0x0000000000bc35e7 in row_ins_index_entry (index=0x7f0eee082678, entry=0x7f0eea1b5a78, thr=0x7f0eee95a998) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/row/row0ins.cc:2995
#12 0x0000000000bc38c8 in row_ins_index_entry_step (node=0x7f0eee95a620, thr=0x7f0eee95a998) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/row/row0ins.cc:3072
#13 0x0000000000bc3bcc in row_ins (node=0x7f0eee95a620, thr=0x7f0eee95a998) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/row/row0ins.cc:3212
#14 0x0000000000bc3f51 in row_ins_step (thr=0x7f0eee95a998) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/row/row0ins.cc:3337
#15 0x0000000000bdc2ba in row_insert_for_mysql (mysql_rec=0x7f0eeea68410 "Tì>\031", prebuilt=0x7f0eee95a078) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/row/row0mysql.cc:1367
#16 0x0000000000ad8c6d in ha_innobase::write_row (this=0x7f0eee3c1110, record=0x7f0eeea68410 "Tì>\031") at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/innobase/handler/ha_innodb.cc:7296
#17 0x000000000064cfba in handler::ha_write_row (this=0x7f0eee3c1110, buf=0x7f0eeea68410 "Tì>\031") at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/handler.cc:7659
#18 0x0000000000712559 in Log_to_csv_event_handler::log_general (this=0x7f0f0c7ff178, thd=0x7f0ef5ac9000, event_time=1422109758, user_host=0x7f0f0e889890 "root[root] @ localhost []", user_host_len=25, thread_id=5, command_type=0xf4e8cc "Query", command_type_len=5, sql_text=0x7f0eeea7f010 "ALTER TABLE t1 CHANGE c1 c1 INTEGER UNSIGNED NOT NULL", sql_text_len=53, client_cs=0x1769d40 <my_charset_tis620_thai_ci>) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/log.cc:512
#19 0x0000000000713fa4 in LOGGER::general_log_write (this=0x187c0c0 <logger>, thd=0x7f0ef5ac9000, command=COM_QUERY, query=0x7f0eeea7f010 "ALTER TABLE t1 CHANGE c1 c1 INTEGER UNSIGNED NOT NULL", query_length=53) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/log.cc:1160
#20 0x0000000000717ade in general_log_write (thd=0x7f0ef5ac9000, command=COM_QUERY, query=0x7f0eeea7f010 "ALTER TABLE t1 CHANGE c1 c1 INTEGER UNSIGNED NOT NULL", query_length=53) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/log.cc:2403
#21 0x00000000007edce7 in mysql_parse (thd=0x7f0ef5ac9000, rawbuf=0x7f0eeea7f010 "ALTER TABLE t1 CHANGE c1 c1 INTEGER UNSIGNED NOT NULL", length=53, parser_state=0x7f0f0e889df0) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/sql_parse.cc:6863
#22 0x00000000007dfdb7 in dispatch_command (command=COM_QUERY, thd=0x7f0ef5ac9000, packet=0x7f0ef5acd001 "ALTER TABLE t1 CHANGE c1 c1 INTEGER UNSIGNED NOT NULL;", packet_length=54) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/sql_parse.cc:1434
#23 0x00000000007decd5 in do_command (thd=0x7f0ef5ac9000) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/sql_parse.cc:1051
#24 0x00000000007a6c4d in do_handle_one_connection (thd_arg=0x7f0efc771000) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/sql_connect.cc:1532
#25 0x00000000007a6755 in handle_one_connection (arg=0x7f0efc771000) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/sql/sql_connect.cc:1443
#26 0x0000000000dc9e60 in pfs_spawn_thread (arg=0x7f0f07b46240) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.22-71.0/storage/perfschema/pfs.cc:1860
#27 0x00007f0f0e2cedf3 in start_thread () from /lib64/libpthread.so.0
#28 0x00007f0f0cf981ad in clone () from /lib64/libc.so.6
Core, GDB, error log etc
Single threaded run, single mysqld involved