create table t1 ( pk int) ;

insert into t1 values (10);

--disable_warnings

delimiter $$;

create function f1() returns varchar(16000) 

begin 

declare ret varchar(16000);  

analyze format=json select t1.`pk` from t1 into ret;

return ret;

end$$

delimiter ;$$

select f1();

--error 0

select 1;

 10.4/src/sql/protocol.cc:1164: virtual bool Protocol_text::store(const char*, size_t, CHARSET_INFO*): Assertion `field_handlers == 0 || field_pos < field_count' failed.

190705 17:36:09 [ERROR] mysqld got signal 6 ;

/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f3276bb6390]

linux/raise.c:54(__GI_raise)[0x7f3275d6b428]

stdlib/abort.c:91(__GI_abort)[0x7f3275d6d02a]

assert/assert.c:92(__assert_fail_base)[0x7f3275d63bd7]

sql/protocol.cc:1165(Protocol_text::store(char const*, unsigned long, charset_info_st const*))[0x5607801089cb]

sql/sql_type.cc:6745(Type_handler::Item_send_str(Item*, Protocol*, st_value*) const)[0x560780435299]

sql/sql_type.h:4659(Type_handler_string_result::Item_send(Item*, Protocol*, st_value*) const)[0x560780440d76]

sql/item.h:1036(Item::send(Protocol*, st_value*))[0x5607801083f1]

sql/protocol.cc:1035(Protocol::send_result_set_row(List<Item>*))[0x5607801b68f0]

sql/sql_class.cc:3005(select_send::send_data(List<Item>&))[0x560780275083]

sql/sql_select.cc:4257(JOIN::exec_inner())[0x56078027499e]

sql/sql_select.cc:4174(JOIN::exec())[0x560780276043]

sql/sql_select.cc:4607(mysql_select(THD*, 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*))[0x56078026660c]

sql/sql_select.cc:425(handle_select(THD*, LEX*, select_result*, unsigned long))[0x56078022ff48]

sql/sql_parse.cc:6340(execute_sqlcom_select(THD*, TABLE_LIST*))[0x560780225d96]

sql/sql_parse.cc:3882(mysql_execute_command(THD*))[0x560780233d20]

sql/sql_parse.cc:7892(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x56078021ff8f]

sql/sql_parse.cc:1829(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x56078021e721]

sql/sql_parse.cc:1360(do_command(THD*))[0x56078039889e]

sql/sql_connect.cc:1404(do_handle_one_connection(CONNECT*))[0x5607803985c7]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f3276bac6ba]

x86_64/clone.S:111(clone)[0x7f3275e3d41d]