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  1. MariaDB Server
  2. MDEV-17818

Server crashes in parse_vcol_defs upon opening a temporary table

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      CREATE TEMPORARY TABLE t (a INT, b INT, v INT AS (a));
      ALTER TABLE t MODIFY b DATETIME ON UPDATE CURRENT_TIMESTAMP;
      UPDATE t t1, t t2 SET t1.a = NULL;
      

      10.2 b86e18cb44f

      #3  <signal handler called>
      #4  0x0000561cdcc23332 in parse_vcol_defs (thd=0x7f6114000b00, mem_root=0x7f6114009bd8, table=0x7f6114009120, error_reported=0x7f6124c93391) at /data/src/10.2/sql/table.cc:1116
      #5  0x0000561cdcc2a575 in open_table_from_share (thd=0x7f6114000b00, share=0x7f611416f0d0, alias=0x7f6114012b70 "t", db_stat=1, prgflag=8, ha_open_flags=16, outparam=0x7f6114009120, is_create_table=false) at /data/src/10.2/sql/table.cc:3202
      #6  0x0000561cdcd1c5b8 in THD::open_temporary_table (this=0x7f6114000b00, share=0x7f611416f0d0, alias=0x7f6114012b70 "t", open_in_engine=true) at /data/src/10.2/sql/temporary_tables.cc:1105
      #7  0x0000561cdcd1af31 in THD::open_temporary_table (this=0x7f6114000b00, tl=0x7f6114012bb8) at /data/src/10.2/sql/temporary_tables.cc:371
      #8  0x0000561cdcd1b14d in THD::open_temporary_tables (this=0x7f6114000b00, tl=0x7f6114012548) at /data/src/10.2/sql/temporary_tables.cc:439
      #9  0x0000561cdcb247bd in mysql_execute_command (thd=0x7f6114000b00) at /data/src/10.2/sql/sql_parse.cc:3394
      #10 0x0000561cdcb32b45 in mysql_parse (thd=0x7f6114000b00, rawbuf=0x7f6114012448 "UPDATE t t1, t t2 SET t1.a = NULL", length=33, parser_state=0x7f6124c94200, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:8012
      #11 0x0000561cdcb2048f in dispatch_command (command=COM_QUERY, thd=0x7f6114000b00, packet=0x7f611408c171 "UPDATE t t1, t t2 SET t1.a = NULL", packet_length=33, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1824
      #12 0x0000561cdcb1edf2 in do_command (thd=0x7f6114000b00) at /data/src/10.2/sql/sql_parse.cc:1378
      #13 0x0000561cdcc7151f in do_handle_one_connection (connect=0x561cdf47d930) at /data/src/10.2/sql/sql_connect.cc:1335
      #14 0x0000561cdcc712ac in handle_one_connection (arg=0x561cdf47d930) at /data/src/10.2/sql/sql_connect.cc:1241
      #15 0x0000561cdd096e6a in pfs_spawn_thread (arg=0x561cdf3e10b0) at /data/src/10.2/storage/perfschema/pfs.cc:1862
      #16 0x00007f612c474494 in start_thread (arg=0x7f6124c95700) at pthread_create.c:333
      #17 0x00007f612aa7593f in clone () from /lib/x86_64-linux-gnu/libc.so.6
      

      Reproducible with at least MyISAM and InnoDB.

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              serg Sergei Golubchik
              elenst Elena Stepanova
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                Resolved:

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