Assertion `! is_set()' failed on FLUSH TABLES with a CONNECT table under lock

MariaDB [test]> install soname 'ha_connect';

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> create table t1 (i int) engine=Connect;

Query OK, 0 rows affected, 2 warnings (0.20 sec)

MariaDB [test]> lock table t1 write;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> flush tables;

ERROR 2013 (HY000): Lost connection to MySQL server during query

sql/sql_error.cc:378: void Diagnostics_area::set_ok_status(ulonglong, ulonglong, const char*): Assertion `! is_set()' failed.

141101  3:16:49 [ERROR] mysqld got signal 6 ;

#6  0x00007f8134d9b6f1 in *__GI___assert_fail (assertion=0xf139a7 "! is_set()", file=<optimized out>, line=378, function=0xf147a0 "void Diagnostics_area::set_ok_status(ulonglong, ulonglong, const char*)") at assert.c:81

#7  0x0000000000656cac in Diagnostics_area::set_ok_status (this=0x7f811c71c0d8, affected_rows=0, last_insert_id=0, message=0x0) at 10.0/sql/sql_error.cc:378

#8  0x00000000006140b6 in my_ok (thd=0x7f811c717070, affected_rows=0, id=0, message=0x0) at 10.0/sql/sql_class.h:3758

#9  0x0000000000680128 in mysql_execute_command (thd=0x7f811c717070) at 10.0/sql/sql_parse.cc:4284

#10 0x000000000068583d in mysql_parse (thd=0x7f811c717070, rawbuf=0x7f810a822088 "flush tables", length=12, parser_state=0x7f8136d1f680) at 10.0/sql/sql_parse.cc:6406

#11 0x0000000000678652 in dispatch_command (command=COM_QUERY, thd=0x7f811c717070, packet=0x7f811c618071 "flush tables", packet_length=12) at 10.0/sql/sql_parse.cc:1299

#12 0x00000000006779f7 in do_command (thd=0x7f811c717070) at 10.0/sql/sql_parse.cc:996

#13 0x0000000000794312 in do_handle_one_connection (thd_arg=0x7f811c717070) at 10.0/sql/sql_connect.cc:1379

#14 0x0000000000794065 in handle_one_connection (arg=0x7f811c717070) at 10.0/sql/sql_connect.cc:1293

#15 0x00007f8136954b50 in start_thread (arg=<optimized out>) at pthread_create.c:304

#16 0x00007f8134e4c20d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

revision-id: svoj@mariadb.org-20141022143349-2lqyg0ao30irpmma

date: 2014-10-22 18:33:49 +0400

build-date: 2014-11-01 03:20:19 +0400

revno: 4451

branch-nick: 10.0