Observed in both 5.5. and 5.6 branches under default sqlgen load (with in-memory data dirs)
5.5 stack trace:
#5 0x00007f7a2dceb5e8 in __GI_abort () at abort.c:90
#6 0x00000000008b8e65 in row_sel_store_mysql_rec (mysql_rec=mysql_rec@entry=0x7f79bc02a8b0 "a\002", prebuilt=prebuilt@entry=0x7f79bc0317d8, rec=rec@entry=0x7f7a0824c0ad "\200",
rec_clust=rec_clust@entry=0, offsets=0x7f7a0270f3e0) at /home/ayurchen/codership/mysql/5.5/storage/innobase/row/row0sel.c:2725
#7 0x00000000008bed55 in row_search_for_mysql (buf=0x7f79bc02a8b0 "a\002", mode=2, prebuilt=0x7f79bc0317d8, match_mode=1, direction=0)
at /home/ayurchen/codership/mysql/5.5/storage/innobase/row/row0sel.c:3732
#8 0x0000000000877a92 in ha_innobase::index_read (this=0x7f79bc02fd20, buf=0x7f79bc02a8b0 "a\002", key_ptr=0x7f79c8006578 "\001", key_len=<optimized out>, find_flag=<optimized out>)
at /home/ayurchen/codership/mysql/5.5/storage/innobase/handler/ha_innodb.cc:6576
#9 0x00000000006cd0fc in handler::index_read_map (this=0x7f79bc02fd20, buf=0x7f79bc02a8b0 "a\002", key=0x7f79c8006578 "\001", keypart_map=<optimized out>, find_flag=HA_READ_KEY_EXACT)
at /home/ayurchen/codership/mysql/5.5/sql/handler.h:1585
#10 0x00000000006c3d5e in handler::index_read_idx_map (this=0x7f79bc02fd20, buf=0x7f79bc02a8b0 "a\002", index=<optimized out>, key=0x7f79c8006578 "\001", keypart_map=1,
find_flag=HA_READ_KEY_EXACT) at /home/ayurchen/codership/mysql/5.5/sql/handler.cc:4861
#11 0x00000000005cc9b0 in join_read_const (tab=tab@entry=0x7f79c80060a0) at /home/ayurchen/codership/mysql/5.5/sql/sql_select.cc:12303
#12 0x00000000005ccbd9 in join_read_const_table (tab=tab@entry=0x7f79c80060a0, pos=pos@entry=0x7f79c80a1600) at /home/ayurchen/codership/mysql/5.5/sql/sql_select.cc:12206
#13 0x00000000005d13d9 in make_join_statistics (join=join@entry=0x7f79c80a1570, tables_arg=0x7f79c8004df0, conds=0x7f79c8005e90, keyuse_array=keyuse_array@entry=0x7f79c80a2b28)
at /home/ayurchen/codership/mysql/5.5/sql/sql_select.cc:3002
#14 0x00000000005d483d in JOIN::optimize (this=this@entry=0x7f79c80a1570) at /home/ayurchen/codership/mysql/5.5/sql/sql_select.cc:1057
#15 0x00000000005d9145 in mysql_select (thd=thd@entry=0x24deca0, rref_pointer_array=rref_pointer_array@entry=0x24e10a8, tables=0x7f79c8004df0, wild_num=1, fields=..., conds=<optimized out>,
og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=select_options@entry=2148797184, result=result@entry=0x7f79c80056a8, unit=unit@entry=0x24e08a0,
select_lex=select_lex@entry=0x24e0ec0) at /home/ayurchen/codership/mysql/5.5/sql/sql_select.cc:2590
#16 0x00000000005d9394 in handle_select (thd=thd@entry=0x24deca0, lex=lex@entry=0x24e07f0, result=result@entry=0x7f79c80056a8, setup_tables_done_option=setup_tables_done_option@entry=0)
at /home/ayurchen/codership/mysql/5.5/sql/sql_select.cc:297
#17 0x000000000058de29 in execute_sqlcom_select (thd=thd@entry=0x24deca0, all_tables=<optimized out>) at /home/ayurchen/codership/mysql/5.5/sql/sql_parse.cc:5066
#18 0x00000000005941ad in mysql_execute_command (thd=thd@entry=0x24deca0) at /home/ayurchen/codership/mysql/5.5/sql/sql_parse.cc:2473
#19 0x000000000059c787 in mysql_parse (thd=thd@entry=0x24deca0, rawbuf=rawbuf@entry=0x7f79c8004c00 "SELECT * FROM comm00 WHERE p = 1", length=length@entry=32,
parser_state=parser_state@entry=0x7f7a02712210) at /home/ayurchen/codership/mysql/5.5/sql/sql_parse.cc:6215
#20 0x000000000059d2a1 in wsrep_mysql_parse (thd=thd@entry=0x24deca0, rawbuf=0x7f79c8004c00 "SELECT * FROM comm00 WHERE p = 1", length=32, parser_state=parser_state@entry=0x7f7a02712210)
at /home/ayurchen/codership/mysql/5.5/sql/sql_parse.cc:6047
#21 0x000000000059e876 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x24deca0, packet=packet@entry=0x24b29d1 "SELECT * FROM comm00 WHERE p = 1",
packet_length=packet_length@entry=32) at /home/ayurchen/codership/mysql/5.5/sql/sql_parse.cc:1200
#22 0x00000000005a0cab in do_command (thd=0x24deca0) at /home/ayurchen/codership/mysql/5.5/sql/sql_parse.cc:854
#23 0x0000000000649eda in do_handle_one_connection (thd_arg=thd_arg@entry=0x2486520) at /home/ayurchen/codership/mysql/5.5/sql/sql_connect.cc:879
#24 0x000000000064a0be in handle_one_connection (arg=0x2486520) at /home/ayurchen/codership/mysql/5.5/sql/sql_connect.cc:795
#25 0x00007f7a2ecc2f6e in start_thread (arg=0x7f7a02713700) at pthread_create.c:311
#26 0x00007f7a2ddab9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
Setting impoertance to High as it pretty much blocks testing of debug builds.