0000000000587b10 <Item_func_group_concat::fix_fields(THD*, Item**)>:
...
...
  587c52:       74 1c                   je     587c70 <Item_func_group_concat::fix_fields(THD*, Item**)+0x160>
  587c54:       b8 01 00 00 00          mov    $0x1,%eax
  587c59:       48 83 c4 38             add    $0x38,%rsp
  587c5d:       5b                      pop    %rbx
  587c5e:       41 5c                   pop    %r12
  587c60:       41 5d                   pop    %r13
  587c62:       41 5e                   pop    %r14
  587c64:       41 5f                   pop    %r15
  587c66:       c9                      leaveq
  587c67:       c3                      retq
  587c68:       0f 1f 84 00 00 00 00    nopl   0x0(%rax,%rax,1)
  587c6f:       00
  587c70:       48 8b 83 e0 00 00 00    mov    0xe0(%rbx),%rax
  587c77:       4a 8b 3c f8             mov    (%rax,%r15,8),%rdi
  587c7b:       48 8b 07                mov    (%rdi),%rax
  587c7e:       be 01 00 00 00          mov    $0x1,%esi
  587c83:       ff 90 90 03 00 00       callq  *0x390(%rax)
  587c89:       84 c0                   test   %al,%al
  587c8b:       75 c7                   jne    587c54 <Item_func_group_concat::fix_fields(THD*, Item**)+0x144>
  587c8d:       4c 8b b3 e0 00 00 00    mov    0xe0(%rbx),%r14
  587c94:       4b 8b 04 fe             mov    (%r14,%r15,8),%rax
  587c98:       0f b6 40 65             movzbl 0x65(%rax),%eax
  587c9c:       08 43 65                or     %al,0x65(%rbx)
  587c9f:       83 45 bc 01             addl   $0x1,-0x44(%rbp)
  587ca3:       44 8b bb d8 00 00 00    mov    0xd8(%rbx),%r15d
  587caa:       44 3b 7d bc             cmp    -0x44(%rbp),%r15d
  587cae:       0f 87 77 ff ff ff       ja     587c2b <Item_func_group_concat::fix_fields(THD*, Item**)+0x11b>
  587cb4:       44 2b bb 18 04 00 00    sub    0x418(%rbx),%r15d
  587cbb:       48 8b 03                mov    (%rbx),%rax
  587cbe:       48 89 df                mov    %rbx,%rdi
  587cc1:       ff 90 48 04 00 00       callq  *0x448(%rax)
  587cc7:       48 8d 7b 68             lea    0x68(%rbx),%rdi
  587ccb:       41 b9 01 00 00 00       mov    $0x1,%r9d
  587cd1:       41 b8 0b 00 00 00       mov    $0xb,%r8d
  587cd7:       44 89 f9                mov    %r15d,%ecx
  587cda:       4c 89 f2                mov    %r14,%rdx
  587cdd:       48 89 c6                mov    %rax,%rsi
  587ce0:       e8 bb ad f7 ff          callq  502aa0 <agg_item_charsets(DTCollation&, char const*, Item**, unsigned int, unsigned int, int)>

bool
Item_func_group_concat::fix_fields(THD *thd, Item **ref)
{
  uint i;                       /* for loop variable */
  DBUG_ASSERT(fixed == 0);

  if (init_sum_func_check(thd))
    return TRUE;

  maybe_null= 1;

  /*
    Fix fields for select list and ORDER clause
  */

  for (i=0 ; i < arg_count ; i++)
  {
    if ((!args[i]->fixed &&
         args[i]->fix_fields(thd, args + i)) ||
        args[i]->check_cols(1))
      return TRUE;
      with_subselect|= args[i]->with_subselect;
  }

  /* skip charset aggregation for order columns */
  if (agg_item_charsets_for_string_result(collation, func_name(),
                                          args, arg_count - arg_count_order))

Item_func_group_concat::Item_func_group_concat(THD *thd,
                                               Item_func_group_concat *item)
  :Item_sum(thd, item),

Item_sum::Item_sum(THD *thd, Item_sum *item):
  Item_result_field(thd, item),
  aggr_sel(item->aggr_sel),
  nest_level(item->nest_level), aggr_level(item->aggr_level),
  quick_group(item->quick_group),
  arg_count(item->arg_count), orig_args(NULL),
  used_tables_cache(item->used_tables_cache),
  forced_const(item->forced_const)
{
  if (arg_count <= 2)
  {
    args=tmp_args;
    orig_args=tmp_orig_args;
  }
  else
  {
    if (!(args= (Item**) thd->alloc(sizeof(Item*)*arg_count)))
      return;
    if (!(orig_args= (Item**) thd->alloc(sizeof(Item*)*arg_count)))
      return;
  }
  memcpy(args, item->args, sizeof(Item*)*arg_count);
  memcpy(orig_args, item->orig_args, sizeof(Item*)*arg_count);
  init_aggregator();
  with_distinct= item->with_distinct;
  if (item->aggr)
    set_aggregator(item->aggr->Aggrtype());
}

diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 7c2eea6..60b019b 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -443,6 +443,8 @@ Item_sum::Item_sum(THD *thd, Item_sum *item):
     if (!(orig_args= (Item**) thd->alloc(sizeof(Item*)*arg_count)))
       return;
   }
+  DBUG_EXECUTE_IF("imitate_alloc_failure",
+                      { orig_args = NULL; return;}  );
   memcpy(args, item->args, sizeof(Item*)*arg_count);
   memcpy(orig_args, item->orig_args, sizeof(Item*)*arg_count);
   init_aggregator();

#3  <signal handler called>
#4  0x0000000000694706 in count_field_types (select_lex=0x7fda12c80a50, param=0x7fda12c7b630, fields=..., reset_with_sum_func=false) at sql/sql_select.cc:20672
#5  0x00000000006692a5 in JOIN::exec (this=0x7fda12c7b440) at sql/sql_select.cc:2667
#6  0x000000000066a7b1 in mysql_select (thd=0x7fda12c7d060, rref_pointer_array=0x7fda12c80cb8, tables=0x7fda2d6e77d0, wild_num=0, fields=..., conds=0x7fda12c7af70, og_num=2, order=0x0, group=0x7fda12c7b1b0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7fda12c7b420, unit=0x7fda12c80378, select_lex=0x7fda12c80a50) at sql/sql_select.cc:3079
#7  0x0000000000661391 in handle_select (thd=0x7fda12c7d060, lex=0x7fda12c802c8, result=0x7fda12c7b420, setup_tables_done_option=0) at sql/sql_select.cc:318
#8  0x000000000063ab53 in execute_sqlcom_select (thd=0x7fda12c7d060, all_tables=0x7fda2d6e77d0) at sql/sql_parse.cc:4687
#9  0x0000000000633d0b in mysql_execute_command (thd=0x7fda12c7d060) at sql/sql_parse.cc:2231
#10 0x000000000063d262 in mysql_parse (thd=0x7fda12c7d060, rawbuf=0x7fda2d559078 "SELECT pbw.date AS 'date',    s.name AS 'Website',    b.name AS 'Brand',    pat.name AS 'Pattern',    group_concat(DISTINCT oe.name ORDER BY oe.name SEPARATOR '/' ) AS 'OE Marking',    d.width AS 'Wid"..., length=1171, parser_state=0x7fda05fb4680) at sql/sql_parse.cc:5798
#11 0x0000000000631283 in dispatch_command (command=COM_QUERY, thd=0x7fda12c7d060, packet=0x7fda12c82061 "SELECT pbw.date AS 'date',    s.name AS 'Website',    b.name AS 'Brand',    pat.name AS 'Pattern',    group_concat(DISTINCT oe.name ORDER BY oe.name SEPARATOR '/' ) AS 'OE Marking',    d.width AS 'Wid"..., packet_length=1171) at sql/sql_parse.cc:1078
#12 0x0000000000630426 in do_command (thd=0x7fda12c7d060) at sql/sql_parse.cc:793
#13 0x0000000000730b2e in do_handle_one_connection (thd_arg=0x7fda1391b060) at sql/sql_connect.cc:1266
#14 0x00000000007305ed in handle_one_connection (arg=0x7fda1391b060) at sql/sql_connect.cc:1181
#15 0x00007fdaec790b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
#16 0x00007fdaeaa4695d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

  if (arg_count <= 2)
  {
    args=tmp_args;
    orig_args=tmp_orig_args;
  }
  else
  {
    if (!(args= (Item**) thd->alloc(sizeof(Item*)*arg_count)))
      return;
    if (!(orig_args= (Item**) thd->alloc(sizeof(Item*)*arg_count)))
      return;
  }

150606  1:18:26 [ERROR] mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed, 
something is definitely wrong and this may fail.

Server version: 5.5.34-MariaDB
key_buffer_size=1073741824
read_buffer_size=262144
max_used_connections=1
max_threads=102
thread_count=1
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 2747656 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x7f5dcaebf000
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x7f5d97fb4e68 thread_stack 0x48000
mysys/stacktrace.c:247(my_print_stacktrace)[0x9d4f96]
sql/signal_handler.cc:153(handle_fatal_signal)[0x6b35c8]
??:0(??)[0x7f5e753250a0]
sql/item_sum.cc:3389(Item_func_group_concat::fix_fields(THD*, Item**))[0x72c96a]
sql/sql_base.cc:8128(setup_fields(THD*, Item**, List<Item>&, enum_mark_columns, List<Item>*, bool))[0x56ccf3]
sql/sql_select.cc:708(JOIN::prepare(Item***, TABLE_LIST*, unsigned int, Item*, unsigned int, st_order*, bool, st_order*, Item*, st_order*, st_select_lex*, st_select_lex_unit*))[0x5daf54]
sql/sql_select.cc:3057(mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x5e20cc]
sql/sql_select.cc:318(handle_select(THD*, LEX*, select_result*, unsigned long))[0x5e7eec]
sql/sql_parse.cc:4688(execute_sqlcom_select)[0x59d8ab]
sql/sql_parse.cc:2231(mysql_execute_command(THD*))[0x5a616b]
sql/sql_parse.cc:5798(mysql_parse)[0x5a9ae9]
sql/sql_parse.cc:1080(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x5aafb6]
sql/sql_connect.cc:1266(do_handle_one_connection(THD*))[0x645a33]
sql/sql_connect.cc:1183(handle_one_connection)[0x645b0a]
??:0(??)[0x7f5e7531cb50]
??:0(??)[0x7f5e73c2a95d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f5d9681e018): SELECT pbw.date AS 'date',    s.name AS 'Website',    b.name AS 'Brand',    pat.name AS 'Pattern',    group_concat(DISTINCT oe.name ORDER BY oe.name SEPARATOR '/' ) AS 'OE Marking',    d.width AS 'Width',    d.ratio AS 'Ratio',    d.diameter AS 'Diameter',    d.load_index AS 'Load Index',    d.speed_index AS 'Speed Index',    IF (pat.run_flat =1 ,'Yes','no') AS 'Runflat',    pbw.wprice_min AS 'Min Price',    pbw.wprice_sum / pbw.wprice_count AS 'AVG Price',    pbw.wprice_max AS 'Max Price'  FROM t_price_by_week pbw  STRAIGHT_JOIN t_site s   ON pbw.website_id = s.id  STRAIGHT_JOIN t_tyre t   ON pbw.tyre_id = t.id  STRAIGHT_JOIN t_pattern pat   ON t.pattern_id = pat.id  STRAIGHT_JOIN t_product prod   ON pat.product_id = prod.id  STRAIGHT_JOIN t_range r   ON prod.range_id = r.id  STRAIGHT_JOIN t_brand b   ON r.brand_id = b.id  STRAIGHT_JOIN t_tyre_dimension d   ON t.tyre_dimension_id = d.id  STRAIGHT_JOIN t_pattern_oe_marking poe   ON poe.pattern_id = pat.id  STRAIGHT_JOIN t_oe_marking oe   ON poe.oe_marking_id = oe.id  WHERE pbw.date = '2014-01-20'  AND s.code IN ('360cn','amacn','tmabr','carcn','maicn','suncn','tmacn','tuhcn','tyrcn')  GROUP BY s.id,t.id
Connection ID (thread ID): 2
Status: NOT_KILLED

#2  <signal handler called>
#3  0x000000000072c96a in Item_func_group_concat::fix_fields (this=0x7f5d9681f128, thd=0x7f5dcaebf000, ref=0x7f5d9681f5b8) at sql/item_sum.cc:3389
#4  0x000000000056ccf3 in setup_fields (thd=0x7f5dcaebf000, ref_pointer_array=0x7f5d9698b018, fields=..., mark_used_columns=<optimized out>, sum_func_list=0x7f5d9684f710, allow_sum_func=<optimized out>) at sql/sql_base.cc:8128
#5  0x00000000005daf54 in prepare (unit_arg=0x7f5dcaec2178, select_lex_arg=0x7f5dcaec2850, proc_param_init=0x0, having_init=0x0, group_init=0x7f5d9684f150, skip_order_by=false, order_init=0x0, og_num=2, conds_init=<optimized out>, wild_num=0, tables_init=<optimized out>, rref_pointer_array=0x7f5dcaec2ab8, this=0x7f5d9684f3e0) at sql/sql_select.cc:712
#6  JOIN::prepare (this=0x7f5d9684f3e0, rref_pointer_array=0x7f5dcaec2ab8, tables_init=<optimized out>, wild_num=0, conds_init=<optimized out>, og_num=2, order_init=0x0, skip_order_by=false, group_init=0x7f5d9684f150, having_init=0x0, proc_param_init=0x0, select_lex_arg=0x7f5dcaec2850, unit_arg=0x7f5dcaec2178) at sql/sql_select.cc:602
#7  0x00000000005e20cc in mysql_select (thd=thd@entry=0x7f5dcaebf000, rref_pointer_array=rref_pointer_array@entry=0x7f5dcaec2ab8, tables=0x7f5d96844780, wild_num=<optimized out>, fields=..., conds=<optimized out>, og_num=2, order=0x0, group=0x7f5d9684f150, having=0x0, proc_param=0x0, select_options=2147748608, result=result@entry=0x7f5d9684f3c0, unit=unit@entry=0x7f5dcaec2178, select_lex=select_lex@entry=0x7f5dcaec2850) at sql/sql_select.cc:3059
#8  0x00000000005e7eec in handle_select (thd=0x7f5dcaebf000, lex=0x7f5dcaec20c8, result=0x7f5d9684f3c0, setup_tables_done_option=0) at sql/sql_select.cc:318
#9  0x000000000059d8ab in execute_sqlcom_select (thd=thd@entry=0x7f5dcaebf000, all_tables=0x7f5d96844780) at sql/sql_parse.cc:4687
#10 0x00000000005a616b in mysql_execute_command (thd=thd@entry=0x7f5dcaebf000) at sql/sql_parse.cc:2231
#11 0x00000000005a9ae9 in mysql_parse (parser_state=0x7f5d97fb4340, thd=0x7f5dcaebf000, rawbuf=<optimized out>, length=<optimized out>) at sql/sql_parse.cc:5798
#12 mysql_parse (thd=0x7f5dcaebf000, rawbuf=<optimized out>, length=1171, parser_state=0x7f5d97fb4340) at sql/sql_parse.cc:5723
#13 0x00000000005aafb6 in dispatch_command (command=COM_QUERY, thd=0x7f5dcaebf000, packet=<optimized out>, packet_length=<optimized out>) at sql/sql_parse.cc:1078
#14 0x0000000000645a33 in do_handle_one_connection (thd_arg=thd_arg@entry=0x7f5da5808000) at sql/sql_connect.cc:1266
#15 0x0000000000645b0a in handle_one_connection (arg=0x7f5da5808000) at sql/sql_connect.cc:1181
#16 0x00007f5e7531cb50 in start_thread (arg=<optimized out>) at pthread_create.c:304
#17 0x00007f5e73c2a95d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#18 0x0000000000000000 in ?? ()

SELECT group_concat(DISTINCT oe.name ORDER BY oe.name SEPARATOR NULL ) AS 'OE Marking'
FROM t_oe_marking oe;


SELECT pbw.date AS 'date',
   s.name AS 'Website',
   b.name AS 'Brand',
   pat.name AS 'Pattern',
   group_concat(DISTINCT oe.name ORDER BY oe.name SEPARATOR '/' ) AS 'OE Marking',
   d.width AS 'Width',
   d.ratio AS 'Ratio',
   d.diameter AS 'Diameter',
   d.load_index AS 'Load Index',
   d.speed_index AS 'Speed Index',
   IF (pat.run_flat =1 ,'Yes','no') AS 'Runflat',
   pbw.wprice_min AS 'Min Price',
   pbw.wprice_sum / pbw.wprice_count AS 'AVG Price',
   pbw.wprice_max AS 'Max Price'
 FROM t_price_by_week pbw
 STRAIGHT_JOIN t_site s
  ON pbw.website_id = s.id
 STRAIGHT_JOIN t_tyre t
  ON pbw.tyre_id = t.id
 STRAIGHT_JOIN t_pattern pat
  ON t.pattern_id = pat.id
 STRAIGHT_JOIN t_product prod
  ON pat.product_id = prod.id
 STRAIGHT_JOIN t_range r
  ON prod.range_id = r.id
 STRAIGHT_JOIN t_brand b
  ON r.brand_id = b.id
 STRAIGHT_JOIN t_tyre_dimension d
  ON t.tyre_dimension_id = d.id
 STRAIGHT_JOIN t_pattern_oe_marking poe
  ON poe.pattern_id = pat.id
 STRAIGHT_JOIN t_oe_marking oe
  ON poe.oe_marking_id = oe.id
 WHERE pbw.date = '2014-01-20'
 AND s.code IN ('360cn','amacn','tmabr','carcn','maicn','suncn','tmacn','tuhcn','tyrcn')
 GROUP BY s.id,t.id
;

commit 90ecf4eba33692e76a83a57be2bc061199a72912
Author: Tor Didriksen <tor.didriksen@oracle.com>
Date:   Mon Sep 9 12:43:08 2013 +0200

    Bug#16870783 RECENT REGRESSION: CRASH WITH GROUP_CONCAT AND INVALID SEPARATOR
    
    Add missing initialization in lex_start()

diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc
index bc313ed..9113f31 100644
--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -411,6 +411,7 @@ void lex_start(THD *thd)
   lex->select_lex.ftfunc_list= &lex->select_lex.ftfunc_list_alloc;
   lex->select_lex.group_list.empty();
   lex->select_lex.order_list.empty();
+  lex->select_lex.gorder_list.empty();
   lex->duplicates= DUP_ERROR;
   lex->ignore= 0;
   lex->spname= NULL;

#3  <signal handler called>
#4  0x0000000000891643 in Item_func_group_concat::Item_func_group_concat (this=0x7f495f825660, context_arg=0x7f4960e0eaa0, distinct_arg=false, select_list=0x7f495f824b28, order_list=..., separator_arg=0x7f495f825640) at sql/item_sum.cc:3188
#5  0x00000000007957c0 in MYSQLparse (thd=0x7f4960e0b060) at sql/sql_yacc.yy:9341
#6  0x00000000006410af in parse_sql (thd=0x7f4960e0b060, parser_state=0x7f49674e9630, creation_ctx=0x0) at sql/sql_parse.cc:7675
#7  0x000000000063d117 in mysql_parse (thd=0x7f4960e0b060, rawbuf=0x7f495f824078 "/* GenTest::Transform::ConvertTablesToDerived */  SELECT GROUP_CONCAT( alias1.`col_int_nokey`, alias1.`col_int_key`, IF( alias1.`col_varchar_nokey`, alias1.`col_int_nokey`, alias1.`col_time_nokey` ), "..., length=1151, parser_state=0x7f49674e9630) at sql/sql_parse.cc:5753
#8  0x0000000000631283 in dispatch_command (command=COM_QUERY, thd=0x7f4960e0b060, packet=0x7f4960e10061 "/* GenTest::Transform::ConvertTablesToDerived */  SELECT GROUP_CONCAT( alias1.`col_int_nokey`, alias1.`col_int_key`, IF( alias1.`col_varchar_nokey`, alias1.`col_int_nokey`, alias1.`col_time_nokey` ), "..., packet_length=1151) at sql/sql_parse.cc:1078
#9  0x0000000000630426 in do_command (thd=0x7f4960e0b060) at sql/sql_parse.cc:793
#10 0x0000000000730b2e in do_handle_one_connection (thd_arg=0x7f4960e0b060) at sql/sql_connect.cc:1266
#11 0x00000000007305ed in handle_one_connection (arg=0x7f4960e0b060) at sql/sql_connect.cc:1181
#12 0x0000000000b632fd in pfs_spawn_thread (arg=0x7f4960db0620) at storage/perfschema/pfs.cc:1015
#13 0x00007f49670dab50 in start_thread (arg=<optimized out>) at pthread_create.c:304
#14 0x00007f496539095d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()