Assertion `!table || (!table->read_set || bitmap_is_set(table->read_set, field_index))' failed in Field_long::val_str on EXPLAIN EXTENDED

CREATE TABLE t1 (f1 INT, f2 INT, KEY(f2)) ENGINE=MyISAM;

INSERT INTO t1 VALUES (6,9);

CREATE TABLE t2 (f3 INT) ENGINE=MyISAM;

INSERT INTO t2 VALUES (2),(0);

EXPLAIN EXTENDED 

SELECT f1 FROM ( SELECT * FROM t1 ) AS sq

WHERE f1 IN ( 

  SELECT f3 FROM t2 WHERE f2 IN ( 

    SELECT f3 FROM t2 HAVING f3 >= 8 

  ) 

);

5.5/sql/field.cc:3669: virtual String* Field_long::val_str(String*, String*): Assertion `!table || (!table->read_set || bitmap_is_set(table->read_set, field_index))' failed.

150325  0:00:42 [ERROR] mysqld got signal 6 ;

#6  0x00007f8f648e2311 in *__GI___assert_fail (assertion=0xe01f70 "!table || (!table->read_set || bitmap_is_set(table->read_set, field_index))", file=<optimized out>, line=3669, function=0xe053a0 "virtual String* Field_long::val_str(String*, String*)") at assert.c:81

#7  0x00000000007c5bd2 in Field_long::val_str (this=0x7f8f5f458b48, val_buffer=0x7f8f5ffb4340, val_ptr=0x7f8f5f587e20) at 5.5/sql/field.cc:3669

#8  0x00000000007fc650 in Item_field::val_str (this=0x7f8f5f587e08, str=0x7f8f5ffb4340) at 5.5/sql/item.cc:2566

#9  0x00000000007f72af in Item::print_value (this=0x7f8f5f587e08, str=0x7f8f5ffb48a0) at 5.5/sql/item.cc:634

#10 0x000000000080754a in Item_field::print (this=0x7f8f5f587e08, str=0x7f8f5ffb48a0, query_type=QT_TO_SYSTEM_CHARSET) at 5.5/sql/item.cc:6697

#11 0x0000000000808a5f in Item_ref::print (this=0x7f8f5f58aa18, str=0x7f8f5ffb48a0, query_type=QT_TO_SYSTEM_CHARSET) at 5.5/sql/item.cc:7204

#12 0x000000000084351c in Item_func::print_op (this=0x7f8f5f542ab8, str=0x7f8f5ffb48a0, query_type=QT_TO_SYSTEM_CHARSET) at 5.5/sql/item_func.cc:491

#13 0x000000000082ae63 in Item_bool_func2::print (this=0x7f8f5f542ab8, str=0x7f8f5ffb48a0, query_type=QT_TO_SYSTEM_CHARSET) at 5.5/sql/item_cmpfunc.h:385

#14 0x0000000000826070 in Item_cond::print (this=0x7f8f5f5437a8, str=0x7f8f5ffb48a0, query_type=QT_TO_SYSTEM_CHARSET) at 5.5/sql/item_cmpfunc.cc:4633

#15 0x000000000069e315 in st_select_lex::print (this=0x7f8f60553a60, thd=0x7f8f60550060, str=0x7f8f5ffb48a0, query_type=QT_TO_SYSTEM_CHARSET) at 5.5/sql/sql_select.cc:23366

#16 0x00000000006298f8 in st_select_lex_unit::print (this=0x7f8f60553380, str=0x7f8f5ffb48a0, query_type=QT_TO_SYSTEM_CHARSET) at 5.5/sql/sql_lex.cc:2361

#17 0x000000000063c0d8 in execute_sqlcom_select (thd=0x7f8f60550060, all_tables=0x7f8f5f5696b0) at 5.5/sql/sql_parse.cc:4674

#18 0x00000000006353de in mysql_execute_command (thd=0x7f8f60550060) at 5.5/sql/sql_parse.cc:2234

#19 0x000000000063ece2 in mysql_parse (thd=0x7f8f60550060, rawbuf=0x7f8f5f687078 "EXPLAIN EXTENDED \nSELECT f1 FROM ( SELECT * FROM t1 ) AS sq\nWHERE f1 IN ( \nSELECT f3 FROM t2 WHERE f2 IN ( \nSELECT f3 FROM t2 HAVING f3 >= 8 \n) \n)", length=146, parser_state=0x7f8f5ffb5620) at 5.5/sql/sql_parse.cc:5909

#20 0x0000000000632925 in dispatch_command (command=COM_QUERY, thd=0x7f8f60550060, packet=0x7f8f60609061 "", packet_length=146) at 5.5/sql/sql_parse.cc:1079

#21 0x0000000000631ab1 in do_command (thd=0x7f8f60550060) at 5.5/sql/sql_parse.cc:793

#22 0x0000000000734122 in do_handle_one_connection (thd_arg=0x7f8f60550060) at 5.5/sql/sql_connect.cc:1266

#23 0x0000000000733be1 in handle_one_connection (arg=0x7f8f60550060) at 5.5/sql/sql_connect.cc:1181

#24 0x0000000000b6c629 in pfs_spawn_thread (arg=0x7f8f60571fc0) at 5.5/storage/perfschema/pfs.cc:1015

#25 0x00007f8f666ddb50 in start_thread (arg=<optimized out>) at pthread_create.c:304

#26 0x00007f8f6499370d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112