Pasting the full bt from ubuntu pastebin here (in case 


#0  0x00007f937a5abf0c in __pthread_kill (threadid=<optimized out>, 
    signo=signo@entry=6) at ../nptl/sysdeps/unix/sysv/linux/pthread_kill.c:62
#1  0x0000000000804b08 in my_write_core (sig=6)
    at /home/teemu/work/bzr/codership-mysql/5.5/mysys/stacktrace.c:433
#2  0x00000000006c388e in handle_fatal_signal (sig=6)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/signal_handler.cc:247
#3  <signal handler called>
#4  0x00007f93795cbf77 in __GI_raise (sig=sig@entry=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#5  0x00007f93795cf5e8 in __GI_abort () at abort.c:90
#6  0x00000000008dfdce in trx_sys_update_wsrep_checkpoint (
    xid=xid@entry=0x7f932800f5e8, 
    sys_header=sys_header@entry=0x7f9354a98026 "", 
    mtr=mtr@entry=0x7f9368556a60)
    at /home/teemu/work/bzr/codership-mysql/5.5/storage/innobase/trx/trx0sys.c:837
#7  0x00000000008e3510 in trx_write_serialisation_history (
    trx=trx@entry=0x7f932800f538)
    at /home/teemu/work/bzr/codership-mysql/5.5/storage/innobase/trx/trx0trx.c:886
#8  0x00000000008e4dc0 in trx_commit_off_kernel (trx=trx@entry=0x7f932800f538)
    at /home/teemu/work/bzr/codership-mysql/5.5/storage/innobase/trx/trx0trx.c:953
#9  0x00000000008e692b in trx_commit_for_mysql (trx=0x7f932800f538)
    at /home/teemu/work/bzr/codership-mysql/5.5/storage/innobase/trx/trx0trx.c:1716
#10 0x000000000085910b in innobase_commit_low (trx=trx@entry=0x7f932800f538)
    at /home/teemu/work/bzr/codership-mysql/5.5/storage/innobase/handler/ha_innodb.cc:2763
#11 0x0000000000862658 in innobase_commit (hton=<optimized out>, thd=
    0x1e17bb0, all=<optimized out>)
    at /home/teemu/work/bzr/codership-mysql/5.5/storage/innobase/handler/ha_innodb.cc:2914
#12 0x00000000006c6746 in ha_commit_one_phase (thd=thd@entry=0x1e17bb0, 
    all=all@entry=true)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/handler.cc:1436
#13 0x00000000006c72c1 in ha_commit_trans (thd=thd@entry=0x1e17bb0, 
    all=all@entry=true)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/handler.cc:1359
#14 0x00000000006587c9 in trans_commit (thd=thd@entry=0x1e17bb0)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/transaction.cc:199
#15 0x000000000065a7e6 in fix_autocommit (self=<optimized out>, thd=0x1e17bb0, 
    type=<optimized out>)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sys_vars.cc:2375
#16 0x00000000005201d8 in sys_var::update (this=0x114b880 <Sys_autocommit>, 
    thd=0x1e17bb0, var=0x7f9328000dd8)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/set_var.cc:205
#17 0x00000000005204e1 in set_var::update (this=<optimized out>, 
    thd=<optimized out>)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/set_var.cc:668
#18 0x0000000000520d6a in sql_set_variables (thd=thd@entry=0x1e17bb0, 
    var_list=var_list@entry=0x1e1a330)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/set_var.cc:571
#19 0x0000000000597549 in mysql_execute_command (thd=thd@entry=0x1e17bb0)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sql_parse.cc:3547
#20 0x000000000059c737 in mysql_parse (thd=thd@entry=0x1e17bb0, 
    rawbuf=rawbuf@entry=0x7f9328000ca0 "SET autocommit=1", 
    length=length@entry=16, parser_state=parser_state@entry=0x7f9368559210)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sql_parse.cc:6215
#21 0x000000000059d251 in wsrep_mysql_parse (thd=thd@entry=0x1e17bb0, 
    rawbuf=0x7f9328000ca0 "SET autocommit=1", length=16, 
    parser_state=parser_state@entry=0x7f9368559210)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sql_parse.cc:6047
#22 0x000000000059e826 in dispatch_command (command=command@entry=COM_QUERY, 
    thd=thd@entry=0x1e17bb0, packet=packet@entry=0x1e60fd1 "SET autocommit=1", 
    packet_length=packet_length@entry=16)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sql_parse.cc:1200
#23 0x00000000005a0c5b in do_command (thd=0x1e17bb0)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sql_parse.cc:854
#24 0x0000000000649e8a in do_handle_one_connection (
    thd_arg=thd_arg@entry=0x1e17bb0)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sql_connect.cc:879
#25 0x000000000064a06e in handle_one_connection (arg=0x1e17bb0)
    at /home/teemu/work/bzr/codership-mysql/5.5/sql/sql_connect.cc:795
---Type <return> to continue, or q <return> to quit---
#26 0x00007f937a5a6f6e in start_thread (arg=0x7f936855a700)
    at pthread_create.c:311
#27 0x00007f937968f9cd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113