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  1. MariaDB Server
  2. MDEV-16170

Server crashes in Item_null_result::type_handler on SELECT with ROLLUP

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      CREATE TABLE t1 (d DATE);
      INSERT INTO t1 VALUES ('2032-10-08');
      SELECT d != '2023-03-04' AS f, COUNT(*) FROM t1 GROUP BY d WITH ROLLUP;
       
      # Cleanup
      DROP TABLE t1;
      

      10.3 4a5e23e257e

      #3  <signal handler called>
      #4  0x0000560d4241d4ed in Item_null_result::type_handler (this=0x7f04a0017c78) at /data/src/10.3/sql/item.h:3186
      #5  0x0000560d423143cb in Item_ref::type_handler (this=0x7f04a0016540) at /data/src/10.3/sql/item.h:4725
      #6  0x0000560d422d08c1 in Item::field_type (this=0x7f04a0016540) at /data/src/10.3/sql/item.h:833
      #7  0x0000560d425704a1 in Temporal_with_date::make_from_item (this=0x7f04b1b356a0, thd=0x7f04a0000b00, item=0x7f04a0016540, flags=33554433) at /data/src/10.3/sql/sql_type.cc:147
      #8  0x0000560d4228dc46 in Temporal_with_date::Temporal_with_date (this=0x7f04b1b356a0, thd=0x7f04a0000b00, item=0x7f04a0016540, flags=33554433) at /data/src/10.3/sql/sql_type.h:294
      #9  0x0000560d4228dd0a in Datetime::Datetime (this=0x7f04b1b356a0, thd=0x7f04a0000b00, item=0x7f04a0016540, flags=33554433) at /data/src/10.3/sql/sql_type.h:369
      #10 0x0000560d4228e93c in Item::val_datetime_packed (this=0x7f04a0016540) at /data/src/10.3/sql/item.h:1452
      #11 0x0000560d426bef25 in Arg_comparator::compare_datetime (this=0x7f04a0015078) at /data/src/10.3/sql/item_cmpfunc.cc:736
      #12 0x0000560d426d31e4 in Arg_comparator::compare (this=0x7f04a0015078) at /data/src/10.3/sql/item_cmpfunc.h:102
      #13 0x0000560d426c22cd in Item_func_ne::val_int (this=0x7f04a0014fb8) at /data/src/10.3/sql/item_cmpfunc.cc:1749
      #14 0x0000560d4257b26b in Type_handler::Item_send_long (this=0x560d43b04300 <type_handler_long>, item=0x7f04a0014fb8, protocol=0x7f04a00010e8, buf=0x7f04b1b35860) at /data/src/10.3/sql/sql_type.cc:5304
      #15 0x0000560d4257f7a2 in Type_handler_long::Item_send (this=0x560d43b04300 <type_handler_long>, item=0x7f04a0014fb8, protocol=0x7f04a00010e8, buf=0x7f04b1b35860) at /data/src/10.3/sql/sql_type.h:2408
      #16 0x0000560d4228e220 in Item::send (this=0x7f04a0014fb8, protocol=0x7f04a00010e8, buffer=0x7f04b1b35860) at /data/src/10.3/sql/item.h:828
      #17 0x0000560d4228951e in Protocol::send_result_set_row (this=0x7f04a00010e8, row_items=0x7f04a0016478) at /data/src/10.3/sql/protocol.cc:986
      #18 0x0000560d423306b0 in select_send::send_data (this=0x7f04a0015c10, items=...) at /data/src/10.3/sql/sql_class.cc:3042
      #19 0x0000560d424142a9 in JOIN::rollup_send_data (this=0x7f04a0015c30, idx=0) at /data/src/10.3/sql/sql_select.cc:24671
      #20 0x0000560d42409bc6 in end_send_group (join=0x7f04a0015c30, join_tab=0x0, end_of_records=true) at /data/src/10.3/sql/sql_select.cc:20560
      #21 0x0000560d42405706 in do_select (join=0x7f04a0015c30, procedure=0x0) at /data/src/10.3/sql/sql_select.cc:18716
      #22 0x0000560d423de958 in JOIN::exec_inner (this=0x7f04a0015c30) at /data/src/10.3/sql/sql_select.cc:3972
      #23 0x0000560d423dddc4 in JOIN::exec (this=0x7f04a0015c30) at /data/src/10.3/sql/sql_select.cc:3766
      #24 0x0000560d423df03a in mysql_select (thd=0x7f04a0000b00, tables=0x7f04a0015368, wild_num=0, fields=..., conds=0x0, og_num=1, order=0x0, group=0x7f04a0015ae8, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f04a0015c10, unit=0x7f04a0004980, select_lex=0x7f04a00050f8) at /data/src/10.3/sql/sql_select.cc:4171
      #25 0x0000560d423d1323 in handle_select (thd=0x7f04a0000b00, lex=0x7f04a00048b8, result=0x7f04a0015c10, setup_tables_done_option=0) at /data/src/10.3/sql/sql_select.cc:382
      #26 0x0000560d4239bd23 in execute_sqlcom_select (thd=0x7f04a0000b00, all_tables=0x7f04a0015368) at /data/src/10.3/sql/sql_parse.cc:6545
      #27 0x0000560d423923bc in mysql_execute_command (thd=0x7f04a0000b00) at /data/src/10.3/sql/sql_parse.cc:3768
      #28 0x0000560d4239fa05 in mysql_parse (thd=0x7f04a0000b00, rawbuf=0x7f04a0014ce8 "SELECT d != '2023-03-04' AS f, COUNT(*) FROM t1 GROUP BY d WITH ROLLUP", length=70, parser_state=0x7f04b1b375e0, is_com_multi=false, is_next_command=false) at /data/src/10.3/sql/sql_parse.cc:8019
      #29 0x0000560d4238ce47 in dispatch_command (command=COM_QUERY, thd=0x7f04a0000b00, packet=0x7f04a000b1f1 "", packet_length=70, is_com_multi=false, is_next_command=false) at /data/src/10.3/sql/sql_parse.cc:1846
      #30 0x0000560d4238b86b in do_command (thd=0x7f04a0000b00) at /data/src/10.3/sql/sql_parse.cc:1391
      #31 0x0000560d424f08a7 in do_handle_one_connection (connect=0x560d448f6e50) at /data/src/10.3/sql/sql_connect.cc:1402
      #32 0x0000560d424f062b in handle_one_connection (arg=0x560d448f6e50) at /data/src/10.3/sql/sql_connect.cc:1308
      #33 0x0000560d4297fe09 in pfs_spawn_thread (arg=0x560d4490a6f0) at /data/src/10.3/storage/perfschema/pfs.cc:1862
      #34 0x00007f04b9667494 in start_thread (arg=0x7f04b1b38700) at pthread_create.c:333
      #35 0x00007f04b7a4d93f in clone () from /lib/x86_64-linux-gnu/libc.so.6
      

      The problem appeared in 10.3 tree with this commit:

      commit 2ccd6716fc730b3ff5e1bc2f8dc08ac561db3cb4
      Author: Monty
      Date:   Thu Apr 26 16:33:05 2018 +0300
       
          Fix a lot of compiler warnings found by -Wunused
      

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            monty Michael Widenius
            elenst Elena Stepanova
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