==14230== Invalid read of size 4
==14230==    at 0x8158F11: Item_field::print(String*, enum_query_type) (item.cc:5454)
==14230==    by 0x813947B: st_select_lex::print_order(String*, st_order*, enum_query_type) (sql_lex.cc:2033)
==14230==    by 0x826EA36: st_select_lex::print(THD*, String*, enum_query_type) (sql_select.cc:16687)
==14230==    by 0x81395B8: st_select_lex_unit::print(String*, enum_query_type) (sql_lex.cc:2001)
==14230==    by 0x8204EC9: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:4993)
==14230==    by 0x820EB04: mysql_execute_command(THD*) (sql_parse.cc:2211)
==14230==    by 0x820FE04: mysql_parse(THD*, char const*, unsigned, char const**) (sql_parse.cc:5929)
==14230==    by 0x8211123: dispatch_command(enum_server_command, THD*, char*, unsigned) (sql_parse.cc:1216)
==14230==    by 0x82121F0: do_command(THD*) (sql_parse.cc:857)
==14230==    by 0x8200889: handle_one_connection (sql_connect.cc:1115)
==14230==    by 0x4893DA: start_thread (in /lib/libpthread-2.5.so)
==14230==    by 0x3D606D: clone (in /lib/libc-2.5.so)
==14230==  Address 0x65BDA54 is 28 bytes inside a block of size 996 free'd
==14230==    at 0x400501A: free (vg_replace_malloc.c:233)
==14230==    by 0x84F4ED1: my_no_flags_free (my_malloc.c:59)
==14230==    by 0x84F57A0: free_root (my_alloc.c:355)
==14230==    by 0x825F2F8: free_tmp_table(THD*, st_table*) (sql_select.cc:10614)
==14230==    by 0x836A976: st_select_lex_unit::cleanup() (sql_union.cc:640)
==14230==    by 0x828186F: mysql_explain_union(THD*, st_select_lex_unit*, select_result*) (sql_select.cc:16364)
==14230==    by 0x8204E6E: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:4987)
==14230==    by 0x820EB04: mysql_execute_command(THD*) (sql_parse.cc:2211)
==14230==    by 0x820FE04: mysql_parse(THD*, char const*, unsigned, char const**) (sql_parse.cc:5929)
==14230==    by 0x8211123: dispatch_command(enum_server_command, THD*, char*, unsigned) (sql_parse.cc:1216)
==14230==    by 0x82121F0: do_command(THD*) (sql_parse.cc:857)
==14230==    by 0x8200889: handle_one_connection (sql_connect.cc:1115)
==14230== 
==14230== Invalid read of size 1
==14230==    at 0x8158F14: Item_field::print(String*, enum_query_type) (item.cc:5454)
==14230==    by 0x813947B: st_select_lex::print_order(String*, st_order*, enum_query_type) (sql_lex.cc:2033)
==14230==    by 0x826EA36: st_select_lex::print(THD*, String*, enum_query_type) (sql_select.cc:16687)
==14230==    by 0x81395B8: st_select_lex_unit::print(String*, enum_query_type) (sql_lex.cc:2001)
==14230==    by 0x8204EC9: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:4993)
==14230==    by 0x820EB04: mysql_execute_command(THD*) (sql_parse.cc:2211)
==14230==    by 0x820FE04: mysql_parse(THD*, char const*, unsigned, char const**) (sql_parse.cc:5929)
==14230==    by 0x8211123: dispatch_command(enum_server_command, THD*, char*, unsigned) (sql_parse.cc:1216)
==14230==    by 0x82121F0: do_command(THD*) (sql_parse.cc:857)
==14230==    by 0x8200889: handle_one_connection (sql_connect.cc:1115)
==14230==    by 0x4893DA: start_thread (in /lib/libpthread-2.5.so)
==14230==    by 0x3D606D: clone (in /lib/libc-2.5.so)
==14230==  Address 0x65C8627 is 1,583 bytes inside a block of size 3,000 free'd
==14230==    at 0x400501A: free (vg_replace_malloc.c:233)
==14230==    by 0x84F4ED1: my_no_flags_free (my_malloc.c:59)
==14230==    by 0x84F5783: free_root (my_alloc.c:349)
==14230==    by 0x825F2F8: free_tmp_table(THD*, st_table*) (sql_select.cc:10614)
==14230==    by 0x836A976: st_select_lex_unit::cleanup() (sql_union.cc:640)
==14230==    by 0x828186F: mysql_explain_union(THD*, st_select_lex_unit*, select_result*) (sql_select.cc:16364)
==14230==    by 0x8204E6E: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:4987)
==14230==    by 0x820EB04: mysql_execute_command(THD*) (sql_parse.cc:2211)
==14230==    by 0x820FE04: mysql_parse(THD*, char const*, unsigned, char const**) (sql_parse.cc:5929)
==14230==    by 0x8211123: dispatch_command(enum_server_command, THD*, char*, unsigned) (sql_parse.cc:1216)
==14230==    by 0x82121F0: do_command(THD*) (sql_parse.cc:857)
==14230==    by 0x8200889: handle_one_connection (sql_connect.cc:1115)