Assertion `mdl_ticket->m_type == MDL_SHARED_UPGRADABLE || mdl_ticket->m_type == MDL_SHARED_NO_WRITE || mdl_ticket->m_type == MDL_SHARED_NO_READ_WRITE || mdl_ticket->m_type == MDL_SHARED_READ' failed in MDL_context::upgrade_shared_lock

--source include/have_innodb.inc

CREATE TABLE t (a INT) ENGINE=InnoDB;

LOCK TABLES t AS t1 WRITE CONCURRENT, t AS t2 READ;

mysqld: /data/src/10.2/sql/mdl.cc:2327: bool MDL_context::upgrade_shared_lock(MDL_ticket*, enum_mdl_type, double): Assertion `mdl_ticket->m_type == MDL_SHARED_UPGRADABLE || mdl_ticket->m_type == MDL_SHARED_NO_WRITE || mdl_ticket->m_type == MDL_SHARED_NO_READ_WRITE || mdl_ticket->m_type == MDL_SHARED_READ' failed.

170523 23:16:49 [ERROR] mysqld got signal 6 ;

#7  0x00007fa10084dee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x00007fa1030be241 in MDL_context::upgrade_shared_lock (this=0x7fa0a8000c00, mdl_ticket=0x7fa0a8079470, new_type=MDL_SHARED_READ_ONLY, lock_wait_timeout=86400) at /data/src/10.2/sql/mdl.cc:2324

#9  0x00007fa102f6a3ee in lock_tables_open_and_lock_tables (thd=0x7fa0a8000b00, tables=0x7fa0a8012470) at /data/src/10.2/sql/sql_parse.cc:2800

#10 0x00007fa102f7020d in mysql_execute_command (thd=0x7fa0a8000b00) at /data/src/10.2/sql/sql_parse.cc:4876

#11 0x00007fa102f798f0 in mysql_parse (thd=0x7fa0a8000b00, rawbuf=0x7fa0a8012348 "LOCK TABLES t AS t1 WRITE CONCURRENT, t AS t2 READ", length=50, parser_state=0x7fa0f4094200, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7874

#12 0x00007fa102f679c8 in dispatch_command (command=COM_QUERY, thd=0x7fa0a8000b00, packet=0x7fa0a81406b1 "LOCK TABLES t AS t1 WRITE CONCURRENT, t AS t2 READ", packet_length=50, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1812

#13 0x00007fa102f66338 in do_command (thd=0x7fa0a8000b00) at /data/src/10.2/sql/sql_parse.cc:1362

#14 0x00007fa1030b10cf in do_handle_one_connection (connect=0x7fa105f36420) at /data/src/10.2/sql/sql_connect.cc:1354

#15 0x00007fa1030b0e5c in handle_one_connection (arg=0x7fa105f36420) at /data/src/10.2/sql/sql_connect.cc:1260

#16 0x00007fa1034cad02 in pfs_spawn_thread (arg=0x7fa105e99d90) at /data/src/10.2/storage/perfschema/pfs.cc:1862

#17 0x00007fa102587494 in start_thread (arg=0x7fa0f4095700) at pthread_create.c:333

#18 0x00007fa10090a93f in clone () from /lib/x86_64-linux-gnu/libc.so.6