CREATE TABLE t1 (i1 int);

insert into t1 values (1),(2),(3); #not important

CREATE VIEW v1 AS

	SELECT t1.i1 FROM (t1 a JOIN t1 ON (t1.i1 = (SELECT t1.i1 FROM t1 b)));

SELECT 1 FROM (SELECT count(((SELECT i1 FROM v1))) FROM v1) dt ;

#3  <signal handler called>

#4  st_select_lex::mark_as_dependent (this=0x7f32f0012888, thd=0x7f32f0000d90, last=0x0, dependency=0x0) at /10.2/src/sql/sql_lex.cc:2502

#5  0x0000560812c7cfe2 in Item_sum::register_sum_func (this=0x7f32f0014838, thd=0x7f32f0000d90, ref=0x7f32f0014970) at /10.2/src/sql/item_sum.cc:403

#6  0x0000560812c7c9b0 in Item_sum::check_sum_func (this=0x7f32f0014838, thd=0x7f32f0000d90, ref=0x7f32f0014970) at /10.2/src/sql/item_sum.cc:198

#7  0x0000560812c7f2a9 in Item_sum_num::fix_fields (this=0x7f32f0014838, thd=0x7f32f0000d90, ref=0x7f32f0014970) at /10.2/src/sql/item_sum.cc:1137

#8  0x00005608128b2a31 in setup_fields (thd=0x7f32f0000d90, ref_pointer_array=..., fields=..., mark_used_columns=MARK_COLUMNS_READ, sum_func_list=0x7f32f0177628, pre_fix=0x7f32f00129c8, allow_sum_func=true) at /10.2/src/sql/sql_base.cc:7288

#9  0x000056081295b5a5 in JOIN::prepare (this=0x7f32f0177308, tables_init=0x7f32f0014a08, wild_num=0, conds_init=0x0, og_num=0, order_init=0x0, skip_order_by=false, group_init=0x0, having_init=0x0, proc_param_init=0x0, select_lex_arg=0x7f32f0012888, unit_arg=0x7f32f0012c80) at /10.2/src/sql/sql_select.cc:807

#10 0x0000560812a0a268 in st_select_lex_unit::prepare (this=0x7f32f0012c80, thd_arg=0x7f32f0000d90, sel_result=0x7f32f0177238, additional_options=0) at /10.2/src/sql/sql_union.cc:596

#11 0x00005608128eb16a in mysql_derived_prepare (thd=0x7f32f0000d90, lex=0x7f32f00048c8, derived=0x7f32f0015078) at /10.2/src/sql/sql_derived.cc:764

#12 0x00005608128e9f35 in mysql_handle_single_derived (lex=0x7f32f00048c8, derived=0x7f32f0015078, phases=2) at /10.2/src/sql/sql_derived.cc:192

#13 0x0000560812a348dc in TABLE_LIST::handle_derived (this=0x7f32f0015078, lex=0x7f32f00048c8, phases=2) at /10.2/src/sql/table.cc:8124

#14 0x0000560812900e42 in LEX::handle_list_of_derived (this=0x7f32f00048c8, table_list=0x7f32f0015078, phases=2) at /10.2/src/sql/sql_lex.h:3205

#15 0x000056081290b7e8 in st_select_lex::handle_derived (this=0x7f32f00050c8, lex=0x7f32f00048c8, phases=2) at /10.2/src/sql/sql_lex.cc:3924

#16 0x000056081295b0b7 in JOIN::prepare (this=0x7f32f009d208, tables_init=0x7f32f0015078, wild_num=0, conds_init=0x0, og_num=0, order_init=0x0, skip_order_by=false, group_init=0x0, having_init=0x0, proc_param_init=0x0, select_lex_arg=0x7f32f00050c8, unit_arg=0x7f32f0004988) at /10.2/src/sql/sql_select.cc:725

#17 0x0000560812966056 in mysql_select (thd=0x7f32f0000d90, tables=0x7f32f0015078, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f32f009d1e8, unit=0x7f32f0004988, select_lex=0x7f32f00050c8) at /10.2/src/sql/sql_select.cc:3827

#18 0x000056081295a25c in handle_select (thd=0x7f32f0000d90, lex=0x7f32f00048c8, result=0x7f32f009d1e8, setup_tables_done_option=0) at /10.2/src/sql/sql_select.cc:361

#19 0x0000560812924771 in execute_sqlcom_select (thd=0x7f32f0000d90, all_tables=0x7f32f0015078) at /10.2/src/sql/sql_parse.cc:6274

#20 0x000056081291b2e5 in mysql_execute_command (thd=0x7f32f0000d90) at /10.2/src/sql/sql_parse.cc:3585

#21 0x000056081292852c in mysql_parse (thd=0x7f32f0000d90, rawbuf=0x7f32f00126f8 "SELECT 1 FROM (SELECT count(((SELECT i1 FROM v1))) FROM v1) dt", length=62, parser_state=0x7f33466a4570, is_com_multi=false, is_next_command=false) at /10.2/src/sql/sql_parse.cc:7796

#22 0x0000560812916756 in dispatch_command (command=COM_QUERY, thd=0x7f32f0000d90, packet=0x7f32f0008b51 "SELECT 1 FROM (SELECT count(((SELECT i1 FROM v1))) FROM v1) dt ", packet_length=63, is_com_multi=false, is_next_command=false) at /10.2/src/sql/sql_parse.cc:1827

#23 0x0000560812915251 in do_command (thd=0x7f32f0000d90) at /10.2/src/sql/sql_parse.cc:1381

#24 0x0000560812a7088e in do_handle_one_connection (connect=0x560816b917c0) at /10.2/src/sql/sql_connect.cc:1336

#25 0x0000560812a705f3 in handle_one_connection (arg=0x560816b917c0) at /10.2/src/sql/sql_connect.cc:1241

#26 0x000056081329c1a8 in pfs_spawn_thread (arg=0x560816b74bc0) at /10.2/src/storage/perfschema/pfs.cc:1869

#27 0x00007f334c8a9609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#28 0x00007f334c483293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

count(((SELECT i1 FROM v1)))

    else if (max_arg_level >= 0 ||

             !(allow_sum_func.is_set(nest_level)))

    {

      /*

        The set function can be aggregated only in outer subqueries.

        Try to find a subquery where it can be aggregated;

        If we fail to find such a subquery report an error.

      */

=>    if (register_sum_func(thd, ref))

(gdb) print max_arg_level

  $33 = 0 '\000'

(gdb) print nest_level

  $35 = 1 '\001'

(gdb) print allow_sum_func

  $38 = {..., buffer = {2}}

  Old value = -1 '\377'

  New value = 0 '\000'

            /*

              A reference is resolved to a nest level that's outer or the same as

              the nest level of the enclosing set function : adjust the value of

              max_arg_level for the function if it's needed.

            */

            if (thd->lex->in_sum_func &&

                thd->lex->in_sum_func->nest_level >= select->nest_level)

            {

              Item::Type ref_type= (*reference)->type();

              set_if_bigger(thd->lex->in_sum_func->max_arg_level,

                            select->nest_level);

=>            set_field(*from_field); 

CREATE VIEW v1 AS

	SELECT t1.i1 FROM (t1 a JOIN t1 ON (t1.i1 = (SELECT t1.i1 FROM t1 b)));

SELECT 1 FROM (SELECT count(((SELECT i1 FROM v1))) FROM v1) dt ;

(gdb) p select->select_number

  $46 = 4

(gdb) p select->nest_level

  $47 = 0

(gdb) p thd->lex->in_sum_func

  $48 = (Item_sum_count *) 0x7fff98018b28

diff --git a/sql/item.cc b/sql/item.cc

index 6e45c6a8086..305f4f2c0ec 100644

--- a/sql/item.cc

+++ b/sql/item.cc

@@ -5494,9 +5494,10 @@ Item_field::fix_outer_field(THD *thd, Field **from_field, Item **reference)

     subselects may contain columns with the same names. The subselects

     are searched starting from the innermost.

   */

+  LEX *lex= context->select_lex->parent_lex;

   Name_resolution_context *last_checked_context= context;

   Item **ref= (Item **) not_found_item;

-  SELECT_LEX *current_sel= thd->lex->current_select;

+  SELECT_LEX *current_sel=  context->select_lex;

   Name_resolution_context *outer_context= 0;

   SELECT_LEX *select= 0;

   /* Currently derived tables cannot be correlated */

@@ -5598,18 +5599,18 @@ Item_field::fix_outer_field(THD *thd, Field **from_field, Item **reference)

               return -1;

             thd->change_item_tree(reference, rf);

             select->inner_refs_list.push_back(rf, thd->mem_root);

-            rf->in_sum_func= thd->lex->in_sum_func;

+            rf->in_sum_func= lex->in_sum_func;

           }

           /*

             A reference is resolved to a nest level that's outer or the same as

             the nest level of the enclosing set function : adjust the value of

             max_arg_level for the function if it's needed.

           */

-          if (thd->lex->in_sum_func &&

-              thd->lex->in_sum_func->nest_level >= select->nest_level)

+          if (lex->in_sum_func &&

+              lex->in_sum_func->nest_level >= select->nest_level)

           {

             Item::Type ref_type= (*reference)->type();

-            set_if_bigger(thd->lex->in_sum_func->max_arg_level,

+            set_if_bigger(lex->in_sum_func->max_arg_level,

                           select->nest_level);

             set_field(*from_field);

             fixed= 1;

@@ -5630,10 +5631,10 @@ Item_field::fix_outer_field(THD *thd, Field **from_field, Item **reference)

                             ((ref_type == REF_ITEM || ref_type == FIELD_ITEM) ?

                              (Item_ident*) (*reference) :

                              0), false);

-          if (thd->lex->in_sum_func &&

-              thd->lex->in_sum_func->nest_level >= select->nest_level)

+          if (lex->in_sum_func &&

+              lex->in_sum_func->nest_level >= select->nest_level)

           {

-            set_if_bigger(thd->lex->in_sum_func->max_arg_level,

+            set_if_bigger(lex->in_sum_func->max_arg_level,

                           select->nest_level);

           }

           /*

@@ -5725,7 +5726,7 @@ Item_field::fix_outer_field(THD *thd, Field **from_field, Item **reference)

     {

       outer_context->select_lex->inner_refs_list.push_back((Item_outer_ref*)rf,

                                                            thd->mem_root);

-      ((Item_outer_ref*)rf)->in_sum_func= thd->lex->in_sum_func;

+      ((Item_outer_ref*)rf)->in_sum_func= lex->in_sum_func;

     }

     thd->change_item_tree(reference, rf);

     /*