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  1. MariaDB Server
  2. MDEV-7038

Assertion `status_var.memory_used == 0' failed in THD::~THD() on disconnect after executing EXPLAIN for multi-table UPDATE

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      CREATE TABLE t1 (a INT);
      CREATE VIEW v1 AS SELECT * FROM t1;
      INSERT INTO t1 VALUES (1),(2);
      EXPLAIN UPDATE v1, mysql.user SET v1.a = v1.a + 1;
      # If you are running it via the client (as opposed to MTR),
      # disconnect now

      10.0/sql/sql_class.cc:1632: virtual THD::~THD(): Assertion `status_var.memory_used == 0' failed.
      141107  1:43:20 [ERROR] mysqld got signal 6 ;

      #6  0x00007fe03921b6f1 in *__GI___assert_fail (assertion=0xf0fccf "status_var.memory_used == 0", file=<optimized out>, line=1632, function=0xf124b0 "virtual THD::~THD()") at assert.c:81
      #7  0x000000000063f5e8 in THD::~THD (this=0x7fe033f2f070, __in_chrg=<optimized out>) at 10.0/sql/sql_class.cc:1632
      #8  0x000000000063f770 in THD::~THD (this=0x7fe033f2f070, __in_chrg=<optimized out>) at 10.0/sql/sql_class.cc:1637
      #9  0x00000000005bf40c in unlink_thd (thd=0x7fe033f2f070) at 10.0/sql/mysqld.cc:2770
      #10 0x00000000005bf76c in one_thread_per_connection_end (thd=0x7fe033f2f070, put_in_cache=true) at 10.0/sql/mysqld.cc:2881
      #11 0x0000000000794550 in do_handle_one_connection (thd_arg=0x7fe033f2f070) at 10.0/sql/sql_connect.cc:1390
      #12 0x00000000007941fd in handle_one_connection (arg=0x7fe033f2f070) at 10.0/sql/sql_connect.cc:1293
      #13 0x0000000000ccb4a6 in pfs_spawn_thread (arg=0x7fe033367bf0) at 10.0/storage/perfschema/pfs.cc:1860
      #14 0x00007fe03add4b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
      #15 0x00007fe0392cc20d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

      Stack trace from

      revision-id: sergii@pisem.net-20141103164737-457hfby1eg82zol9
      date: 2014-11-03 17:47:37 +0100
      build-date: 2014-11-07 01:51:22 +0400
      revno: 4471
      branch-nick: 10.0

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            • Assignee:
              sanja Oleksandr Byelkin
              Reporter:
              elenst Elena Stepanova
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                Updated:
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