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

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

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