Assertion `fixed == 0' failed in Item_func::fix_fields

--source include/have_innodb.inc

CREATE TABLE `gtfmt` (

  `numgtfmt` char(10) COLLATE utf8_bin NOT NULL 

) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

create or replace view gtfmtl(numgtfmt)

as

select 'x' from gtfmt

union

select 'x' from gtfmt ;

SELECT * FROM gtfmtl WHERE numgtfmt =  NAME_CONST('wnumgtfmt',_utf8'QEDITIONS' COLLATE 'utf8_bin');

# Cleanup

DROP VIEW gtfmtl;

DROP TABLE gtfmt;

mysqld: /data/src/10.2/sql/item_func.cc:179: virtual bool Item_func::fix_fields(THD*, Item**): Assertion `fixed == 0' failed.

171211  0:20:34 [ERROR] mysqld got signal 6 ;

#7  0x00007f8c3568aee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x00005628b02e6a65 in Item_func::fix_fields (this=0x7f8bd8013138, thd=0x7f8bd8000b00, ref=0x7f8bd8034b00) at /data/src/10.2/sql/item_func.cc:179

#9  0x00005628b0318595 in Item_str_func::fix_fields (this=0x7f8bd8013138, thd=0x7f8bd8000b00, ref=0x7f8bd8034b00) at /data/src/10.2/sql/item_strfunc.cc:106

#10 0x00005628b028862e in Item_name_const::fix_fields (this=0x7f8bd8034a80, thd=0x7f8bd8000b00, ref=0x7f8bd80347c8) at /data/src/10.2/sql/item.cc:1817

#11 0x00005628b02e6ba3 in Item_func::fix_fields (this=0x7f8bd8034730, thd=0x7f8bd8000b00, ref=0x7f8bd80174b0) at /data/src/10.2/sql/item_func.cc:210

#12 0x00005628b0040591 in JOIN::optimize_inner (this=0x7f8bd80170a8) at /data/src/10.2/sql/sql_select.cc:1297

#13 0x00005628b003fa89 in JOIN::optimize (this=0x7f8bd80170a8) at /data/src/10.2/sql/sql_select.cc:1085

#14 0x00005628b00e54a2 in st_select_lex_unit::optimize (this=0x7f8bd8013740) at /data/src/10.2/sql/sql_union.cc:919

#15 0x00005628affd07d2 in mysql_derived_optimize (thd=0x7f8bd8000b00, lex=0x7f8bd80045d8, derived=0x7f8bd8012768) at /data/src/10.2/sql/sql_derived.cc:886

#16 0x00005628affcf0c7 in mysql_handle_single_derived (lex=0x7f8bd80045d8, derived=0x7f8bd8012768, phases=4) at /data/src/10.2/sql/sql_derived.cc:197

#17 0x00005628b004083c in JOIN::optimize_inner (this=0x7f8bd80169b0) at /data/src/10.2/sql/sql_select.cc:1337

#18 0x00005628b003fa89 in JOIN::optimize (this=0x7f8bd80169b0) at /data/src/10.2/sql/sql_select.cc:1085

#19 0x00005628b0048ab4 in mysql_select (thd=0x7f8bd8000b00, tables=0x7f8bd8012768, wild_num=1, fields=..., conds=0x7f8bd8013310, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f8bd8016990, unit=0x7f8bd80046a0, select_lex=0x7f8bd8004dd8) at /data/src/10.2/sql/sql_select.cc:3695

#20 0x00005628b003d3a8 in handle_select (thd=0x7f8bd8000b00, lex=0x7f8bd80045d8, result=0x7f8bd8016990, setup_tables_done_option=0) at /data/src/10.2/sql/sql_select.cc:373

#21 0x00005628b00094a0 in execute_sqlcom_select (thd=0x7f8bd8000b00, all_tables=0x7f8bd8012768) at /data/src/10.2/sql/sql_parse.cc:6455

#22 0x00005628affff4a3 in mysql_execute_command (thd=0x7f8bd8000b00) at /data/src/10.2/sql/sql_parse.cc:3462

#23 0x00005628b000ce62 in mysql_parse (thd=0x7f8bd8000b00, rawbuf=0x7f8bd80124e8 "SELECT * FROM gtfmtl WHERE numgtfmt =  NAME_CONST('wnumgtfmt',_utf8'QEDITIONS' COLLATE 'utf8_bin')", length=98, parser_state=0x7f8c30167200, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7896

#24 0x00005628afffad94 in dispatch_command (command=COM_QUERY, thd=0x7f8bd8000b00, packet=0x7f8bd808d211 "SELECT * FROM gtfmtl WHERE numgtfmt =  NAME_CONST('wnumgtfmt',_utf8'QEDITIONS' COLLATE 'utf8_bin')", packet_length=98, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1805

#25 0x00005628afff96f2 in do_command (thd=0x7f8bd8000b00) at /data/src/10.2/sql/sql_parse.cc:1360

#26 0x00005628b0147169 in do_handle_one_connection (connect=0x5628b3969000) at /data/src/10.2/sql/sql_connect.cc:1354

#27 0x00005628b0146ef6 in handle_one_connection (arg=0x5628b3969000) at /data/src/10.2/sql/sql_connect.cc:1260

#28 0x00005628b056588e in pfs_spawn_thread (arg=0x5628b38cc950) at /data/src/10.2/storage/perfschema/pfs.cc:1863

#29 0x00007f8c37361494 in start_thread (arg=0x7f8c30168700) at pthread_create.c:333

#30 0x00007f8c3574793f in clone () from /lib/x86_64-linux-gnu/libc.so.6