Assertion `field_pos < field_count' failed in Protocol_text::store, Assertion `field_handlers == 0 || field_pos < field_count'

CREATE TABLE t1 (ct time);

INSERT INTO t1 VALUES ('16:11:28');

DELIMITER @@@;

CREATE FUNCTION f1 () RETURNS varchar(100) 

BEGIN 

DECLARE xxx varchar(100); 

ANALYZE SELECT sum(ct) FROM t1 INTO xxx ; 

RETURN xxx; 

END@@@

DELIMITER ;@@@

--error 2000

SELECT f1();

--error 0

SELECT f1();

mysqld: /10.2/src/sql/protocol.cc:1119: virtual bool Protocol_text::store(const char*, size_t, CHARSET_INFO*): Assertion `field_pos < field_count' failed.

stdlib/abort.c:91(__GI_abort)[0x7fb4930ff02a]

assert/assert.c:92(__assert_fail_base)[0x7fb4930f5bd7]

/lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7fb4930f5c82]

sql/protocol.cc:1120(Protocol_text::store(char const*, unsigned long, charset_info_st const*))[0x55d546f3a851]

sql/item.cc:6864(Item::send(Protocol*, String*))[0x55d547719f29]

sql/protocol.cc:979(Protocol::send_result_set_row(List<Item>*))[0x55d546f39adc]

sql/sql_class.cc:2708(select_send::send_data(List<Item>&))[0x55d5470536f0]

sql/sql_select.cc:3495(JOIN::exec_inner())[0x55d5471a59f7]

sql/sql_select.cc:3417(JOIN::exec())[0x55d5471a4874]

sql/sql_select.cc:3818(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*))[0x55d5471a7bc1]

sql/sql_select.cc:376(handle_select(THD*, LEX*, select_result*, unsigned long))[0x55d5471873dd]

sql/sql_parse.cc:6479(execute_sqlcom_select(THD*, TABLE_LIST*))[0x55d54710df28]

sql/sql_parse.cc:3485(mysql_execute_command(THD*))[0x55d5470faf21]

sql/sql_parse.cc:8013(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x55d54711668d]

sql/sql_parse.cc:1826(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x55d5470f1b74]

sql/sql_parse.cc:1378(do_command(THD*))[0x55d5470eed28]

sql/sql_connect.cc:1335(do_handle_one_connection(CONNECT*))[0x55d547414be4]

sql/sql_connect.cc:1242(handle_one_connection)[0x55d5474145ec]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7fb493d3a6ba]

x86_64/clone.S:111(clone)[0x7fb4931cf41d]