Comment 0 for bug 1384658

** GDB info

#0 0x00007fcd9e7cd771 in pthread_kill () from /lib64/libpthread.so.0
#1 0x0000000000ab7586 in my_write_core (sig=11) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.
0/mysys/stacktrace.c:422
#2 0x000000000072f9ff in handle_fatal_signal (sig=11) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.
21-69.0/sql/signal_handler.cc:236
#3 <signal handler called>
#4 0x0000000000e96713 in decimal_add (from1=0x0, from2=0x7fcd803f5db0, to=0x7fcd803f5f30) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/labe
l_exp/centos6-64/percona-server-5.6.21-69.0/strings/decimal.c:2036
#5 0x000000000067121a in my_decimal_add (mask=28, res=0x7fcd803f5f30, a=0x0, b=0x7fcd803f5db0) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl
/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/my_decimal.h:457
#6 0x00000000006b13aa in Item_func_plus::decimal_op (this=0x7fcd440067c8, decimal_value=0x7fcd803f5f30) at /mnt/workspace/percona-server-5.6-binaries-de
bug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/item_func.cc:1397
#7 0x00000000006b00a7 in Item_func_numhybrid::val_decimal (this=0x7fcd440067c8, decimal_value=0x7fcd803f5f30) at /mnt/workspace/percona-server-5.6-binar
ies-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/item_func.cc:1022
#8 0x000000000064f57e in Item::val_decimal_result (this=0x7fcd440067c8, val=0x7fcd803f5f30) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/la
bel_exp/centos6-64/percona-server-5.6.21-69.0/sql/item.h:1190
#9 0x0000000000939433 in make_sortkey (param=0x7fcd803f62f0, to=0x7fcd44936528 '\217' <repeats 3304 times>, ref_pos=0x7fcd44886418 "") at /mnt/workspace
/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/filesort.cc:1094
#10 0x0000000000938738 in find_all_keys (param=0x7fcd803f62f0, select=0x7fcd4489e598, fs_info=0x7fcd803f6280, buffpek_pointers=0x7fcd803f6490, tempfile=0
x7fcd803f6370, pq=0x0, found_rows=0x7fcd803f6710) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/filesort.cc:817
#11 0x0000000000936ef1 in filesort (thd=0x2d48530, table=0x7fcd448d5250, filesort=0x7fcd4489ed70, sort_positions=false, examined_rows=0x7fcd803f6718, found_rows=0x7fcd803f6710) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/filesort.cc:339
#12 0x00000000007b8257 in create_sort_index (thd=0x2d48530, join=0x7fcd440069a8, tab=0x7fcd4489df98) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_executor.cc:3346
#13 0x00000000007b5d09 in st_join_table::sort_table (this=0x7fcd4489df98) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_executor.cc:2511
#14 0x00000000007b57d9 in join_init_read_record (tab=0x7fcd4489df98) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_executor.cc:2385
#15 0x00000000007b3083 in sub_select (join=0x7fcd440069a8, join_tab=0x7fcd4489df98, end_of_records=false) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_executor.cc:1256
#16 0x00000000007b2a6d in do_select (join=0x7fcd440069a8) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_executor.cc:933
#17 0x00000000007b09c9 in JOIN::exec (this=0x7fcd440069a8) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_executor.cc:194
#18 0x000000000081401b in mysql_execute_select (thd=0x2d48530, select_lex=0x2d4b190, free_join=true) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_select.cc:1100
#19 0x0000000000814317 in mysql_select (thd=0x2d48530, tables=0x7fcd44006098, wild_num=0, fields=..., conds=0x0, order=0x2d4b358, group=0x2d4b290, having=0x0, select_options=2349075200, result=0x7fcd44006980, unit=0x2d4ab48, select_lex=0x2d4b190) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_select.cc:1221
#20 0x00000000008123a6 in handle_select (thd=0x2d48530, result=0x7fcd44006980, setup_tables_done_option=0) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_select.cc:110
#21 0x00000000007ea892 in execute_sqlcom_select (thd=0x2d48530, all_tables=0x7fcd44006098) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:5597
#22 0x00000000007e2de9 in mysql_execute_command (thd=0x2d48530) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:2958
#23 0x00000000007ed193 in mysql_parse (thd=0x2d48530, rawbuf=0x7fcd440050a0 "SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY aa+0", length=64, parser_state=0x7fcd803f7e30) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:6773
#24 0x00000000007df5fc in dispatch_command (command=COM_QUERY, thd=0x2d48530, packet=0x3545e51 "", packet_length=65) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:1432
#25 0x00000000007de528 in do_command (thd=0x2d48530) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:1049
#26 0x00000000007a64e5 in do_handle_one_connection (thd_arg=0x2d48530) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_connect.cc:1532
#27 0x00000000007a5fed in handle_one_connection (arg=0x2d48530) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_connect.cc:1443
#28 0x0000000000dc5bac in pfs_spawn_thread (arg=0x34b9070) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/storage/perfschema/pfs.cc:1860
#29 0x00007fcd9e7c8df3 in start_thread () from /lib64/libpthread.so.0
#30 0x00007fcd9d49201d in clone () from /lib64/libc.so.6

** SQL info

 SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY aa+0