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  1. MariaDB Server
  2. MDEV-28437

Assertion `!eliminated' failed in Item_subselect::exec

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      --source include/have_innodb.inc
       
      CREATE TABLE t1 (a INT) ENGINE=InnoDB;
      INSERT INTO t1 VALUES (1),(2);
      CREATE TABLE t2 (b INT PRIMARY KEY) ENGINE=InnoDB;
      INSERT INTO t1 VALUES (3),(4);
       
      SELECT 1 IN (SELECT a FROM t1 LEFT JOIN t2 ON (a = b AND EXISTS (SELECT * FROM t1)));
       
      # Cleanup
      DROP TABLE t1, t2;
      

      10.2 c711abd1

      mysqld: /data/src/10.2/sql/item_subselect.cc:755: virtual bool Item_subselect::exec(): Assertion `!eliminated' failed.
      220428 17:03:16 [ERROR] mysqld got signal 6 ;
       
      #7  0x00007f08a1177662 in __GI___assert_fail (assertion=0x55aa3df68974 "!eliminated", file=0x55aa3df686a0 "/data/src/10.2/sql/item_subselect.cc", line=755, function=0x55aa3df68950 "virtual bool Item_subselect::exec()") at assert.c:101
      #8  0x000055aa3d76e169 in Item_subselect::exec (this=0x7f0844015898) at /data/src/10.2/sql/item_subselect.cc:755
      #9  0x000055aa3d7713a1 in Item_exists_subselect::val_int (this=0x7f0844015898) at /data/src/10.2/sql/item_subselect.cc:1722
      #10 0x000055aa3d6ec704 in Item_in_optimizer::val_int (this=0x7f0844017b00) at /data/src/10.2/sql/item_cmpfunc.cc:1598
      #11 0x000055aa3d6bf604 in Item::val_bool (this=0x7f0844017b00) at /data/src/10.2/sql/item.cc:112
      #12 0x000055aa3d4b6cac in Item::eval_const_cond (this=0x7f0844017b00) at /data/src/10.2/sql/item.h:1190
      #13 0x000055aa3d6f699f in Item_cond::eval_not_null_tables (this=0x7f0844015a70, opt_arg=0x0) at /data/src/10.2/sql/item_cmpfunc.cc:4708
      #14 0x000055aa3d3cd0be in Item_func_or_sum::walk (this=0x7f0844015a70, processor=&virtual table offset 952, walk_subquery=false, arg=0x0) at /data/src/10.2/sql/item.h:4422
      #15 0x000055aa3d6f6c92 in Item_cond::walk (this=0x7f0844015a70, processor=&virtual table offset 952, walk_subquery=false, arg=0x0) at /data/src/10.2/sql/item_cmpfunc.cc:4780
      #16 0x000055aa3d41fe1d in st_select_lex::update_used_tables (this=0x7f08440128b8) at /data/src/10.2/sql/sql_lex.cc:4235
      #17 0x000055aa3d41f3af in st_select_lex::optimize_unflattened_subqueries (this=0x7f08440050d8, const_only=true) at /data/src/10.2/sql/sql_lex.cc:3870
      #18 0x000055aa3d5de843 in JOIN::optimize_constant_subqueries (this=0x7f0844016690) at /data/src/10.2/sql/opt_subselect.cc:5360
      #19 0x000055aa3d46ff24 in JOIN::optimize_inner (this=0x7f0844016690) at /data/src/10.2/sql/sql_select.cc:1349
      #20 0x000055aa3d46f412 in JOIN::optimize (this=0x7f0844016690) at /data/src/10.2/sql/sql_select.cc:1127
      #21 0x000055aa3d4788eb in mysql_select (thd=0x7f0844000d90, tables=0x0, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f0844016670, unit=0x7f0844004988, select_lex=0x7f08440050d8) at /data/src/10.2/sql/sql_select.cc:3835
      #22 0x000055aa3d46cb7f in handle_select (thd=0x7f0844000d90, lex=0x7f08440048c8, result=0x7f0844016670, setup_tables_done_option=0) at /data/src/10.2/sql/sql_select.cc:361
      #23 0x000055aa3d4380aa in execute_sqlcom_select (thd=0x7f0844000d90, all_tables=0x7f0844013550) at /data/src/10.2/sql/sql_parse.cc:6271
      #24 0x000055aa3d42ec41 in mysql_execute_command (thd=0x7f0844000d90) at /data/src/10.2/sql/sql_parse.cc:3582
      #25 0x000055aa3d43bdc0 in mysql_parse (thd=0x7f0844000d90, rawbuf=0x7f0844012708 "SELECT 1 IN (SELECT a FROM t1 LEFT JOIN t2 ON (a = b AND EXISTS (SELECT * FROM t1)))", length=84, parser_state=0x7f08975075e0, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7793
      #26 0x000055aa3d42a163 in dispatch_command (command=COM_QUERY, thd=0x7f0844000d90, packet=0x7f0844008b61 "SELECT 1 IN (SELECT a FROM t1 LEFT JOIN t2 ON (a = b AND EXISTS (SELECT * FROM t1)))", packet_length=84, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1827
      #27 0x000055aa3d428c7c in do_command (thd=0x7f0844000d90) at /data/src/10.2/sql/sql_parse.cc:1381
      #28 0x000055aa3d580b26 in do_handle_one_connection (connect=0x55aa40292e10) at /data/src/10.2/sql/sql_connect.cc:1336
      #29 0x000055aa3d58089a in handle_one_connection (arg=0x55aa40292e10) at /data/src/10.2/sql/sql_connect.cc:1241
      #30 0x000055aa3dd88d1f in pfs_spawn_thread (arg=0x55aa4027d280) at /data/src/10.2/storage/perfschema/pfs.cc:1869
      #31 0x00007f08a163bea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #32 0x00007f08a1240def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      The failure started happening on 10.2 after this commit:

      commit 5100b20b15edd93200f34a79d25f1b14e46a677e
      Author: Sergei Petrunia
      Date:   Fri Apr 22 20:26:14 2022 +0300
       
          MDEV-26047: MariaDB server crash at Item_subselect::init_expr_cache_tracker
      

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              Assignee:
              psergei Sergei Petrunia
              Reporter:
              elenst Elena Stepanova
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