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  1. MariaDB Server
  2. MDEV-24664

Assertion `! is_set()' failed in Diagnostics_area::set_eof_status upon EXPLAIN on multi-table DELETE executed via PS

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      CREATE TABLE t1 (a INT);
      INSERT INTO t1 VALUES (1),(2); # Optional
       
      PREPARE stmt FROM 'EXPLAIN DELETE FROM t1.* USING t1';
      EXECUTE stmt;
       
      # Cleanup
      DEALLOCATE PREPARE stmt;
      DROP TABLE t1;
      

      10.2 59e6d14c

      mysqld: /data/src/10.2/sql/sql_error.cc:420: void Diagnostics_area::set_eof_status(THD*): Assertion `! is_set()' failed.
      210124  1:11:33 [ERROR] mysqld got signal 6 ;
       
      #7  0x00007ff96a746f36 in __GI___assert_fail (assertion=0x5607c21c0c8c "! is_set()", file=0x5607c21c0a00 "/data/src/10.2/sql/sql_error.cc", line=420, function=0x5607c21c0c60 "void Diagnostics_area::set_eof_status(THD*)") at assert.c:101
      #8  0x00005607c1728fe6 in Diagnostics_area::set_eof_status (this=0x7ff954005f40, thd=0x7ff954000d90) at /data/src/10.2/sql/sql_error.cc:420
      #9  0x00005607c167d3e1 in my_eof (thd=0x7ff954000d90) at /data/src/10.2/sql/sql_class.h:4578
      #10 0x00005607c170e3ed in select_send::send_eof (this=0x7ff954014b38) at /data/src/10.2/sql/sql_class.cc:2757
      #11 0x00005607c18e28aa in Explain_query::send_explain (this=0x7ff954012ea8, thd=0x7ff954000d90) at /data/src/10.2/sql/sql_explain.cc:174
      #12 0x00005607c1758dc6 in mysql_execute_command (thd=0x7ff954000d90) at /data/src/10.2/sql/sql_parse.cc:4473
      #13 0x00005607c17819f5 in Prepared_statement::execute (this=0x7ff954037ee0, expanded_query=0x7ff96489f9a0, open_cursor=false) at /data/src/10.2/sql/sql_prepare.cc:5037
      #14 0x00005607c177fefe in Prepared_statement::execute_loop (this=0x7ff954037ee0, expanded_query=0x7ff96489f9a0, open_cursor=false, packet=0x0, packet_end=0x0) at /data/src/10.2/sql/sql_prepare.cc:4466
      #15 0x00005607c177dc5e in mysql_sql_stmt_execute (thd=0x7ff954000d90) at /data/src/10.2/sql/sql_prepare.cc:3574
      #16 0x00005607c175600a in mysql_execute_command (thd=0x7ff954000d90) at /data/src/10.2/sql/sql_parse.cc:3575
      #17 0x00005607c17633bf in mysql_parse (thd=0x7ff954000d90, rawbuf=0x7ff9540126f8 "EXECUTE stmt", length=12, parser_state=0x7ff9648a05f0, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7763
      #18 0x00005607c1751698 in dispatch_command (command=COM_QUERY, thd=0x7ff954000d90, packet=0x7ff954008b51 "", packet_length=12, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1827
      #19 0x00005607c1750193 in do_command (thd=0x7ff954000d90) at /data/src/10.2/sql/sql_parse.cc:1381
      #20 0x00005607c18aaaae in do_handle_one_connection (connect=0x5607c3ff59c0) at /data/src/10.2/sql/sql_connect.cc:1336
      #21 0x00005607c18aa813 in handle_one_connection (arg=0x5607c3ff59c0) at /data/src/10.2/sql/sql_connect.cc:1241
      #22 0x00005607c20d2dd2 in pfs_spawn_thread (arg=0x5607c3fd8d80) at /data/src/10.2/storage/perfschema/pfs.cc:1869
      #23 0x00007ff96ac56609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #24 0x00007ff96a832293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      Reproducible on 10.2+.
      No obvious problem on a non-debug build.

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              Assignee:
              sanja Oleksandr Byelkin
              Reporter:
              elenst Elena Stepanova
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