USE test;

CREATE TEMPORARY TABLE t (c INT);

LOCK TABLE t WRITE;

DROP SEQUENCE IF EXISTS t;

mysqld: /test/10.5_dbg/sql/sql_table.cc:2396: int mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool, bool, bool): Assertion `thd->mdl_context.is_lock_owner(MDL_key::TABLE, db.str, table_name.str, MDL_SHARED)' failed.

Core was generated by `/test/MD140720-mariadb-10.5.5-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGABRT, Aborted.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6)

    at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

[Current thread is 1 (Thread 0x1515df246700 (LWP 1424019))]

(gdb) bt

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

#1  0x000055676f2f74d7 in my_write_core (sig=sig@entry=6) at /test/10.5_dbg/mysys/stacktrace.c:518

#2  0x000055676eab19ba in handle_fatal_signal (sig=6) at /test/10.5_dbg/sql/signal_handler.cc:330

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51

#5  0x00001515dd4dc8b1 in __GI_abort () at abort.c:79

#6  0x00001515dd4cc42a in __assert_fail_base (fmt=0x1515dd653a38 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x55676f490a20 "thd->mdl_context.is_lock_owner(MDL_key::TABLE, db.str, table_name.str, MDL_SHARED)", file=file@entry=0x55676f490208 "/test/10.5_dbg/sql/sql_table.cc", line=line@entry=2396, function=function@entry=0x55676f493160 <mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool, bool, bool)::__PRETTY_FUNCTION__> "int mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool, bool, bool)") at assert.c:92

#7  0x00001515dd4cc4a2 in __GI___assert_fail (assertion=assertion@entry=0x55676f490a20 "thd->mdl_context.is_lock_owner(MDL_key::TABLE, db.str, table_name.str, MDL_SHARED)", file=file@entry=0x55676f490208 "/test/10.5_dbg/sql/sql_table.cc", line=line@entry=2396, function=function@entry=0x55676f493160 <mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool, bool, bool)::__PRETTY_FUNCTION__> "int mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool, bool, bool)") at assert.c:101

#8  0x000055676e8c881a in mysql_rm_table_no_locks (thd=thd@entry=0x1515bac15088, tables=tables@entry=0x1515bac74170, if_exists=if_exists@entry=true, drop_temporary=drop_temporary@entry=false, drop_view=drop_view@entry=false, drop_sequence=drop_sequence@entry=true, dont_log_query=false, dont_free_locks=false) at /test/10.5_dbg/sql/sql_table.cc:2395

#9  0x000055676e8caa03 in mysql_rm_table (thd=thd@entry=0x1515bac15088, tables=tables@entry=0x1515bac74170, if_exists=<optimized out>, drop_temporary=<optimized out>, drop_sequence=<optimized out>, dont_log_query=dont_log_query@entry=false) at /test/10.5_dbg/sql/sql_table.cc:2143

#10 0x000055676e808307 in mysql_execute_command (thd=thd@entry=0x1515bac15088) at /test/10.5_dbg/sql/sql_parse.cc:4921

#11 0x000055676e812752 in mysql_parse (thd=thd@entry=0x1515bac15088, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x1515df245350, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:7993

#12 0x000055676e7ff204 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x1515bac15088, packet=packet@entry=0x1515bac67089 "DROP SEQUENCE IF EXISTS t", packet_length=packet_length@entry=25, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:1866

#13 0x000055676e7fd9de in do_command (thd=0x1515bac15088) at /test/10.5_dbg/sql/sql_parse.cc:1347

#14 0x000055676e959c3b in do_handle_one_connection (connect=<optimized out>, connect@entry=0x1515be0c7808, put_in_cache=put_in_cache@entry=true) at /test/10.5_dbg/sql/sql_connect.cc:1411

#15 0x000055676e95a357 in handle_one_connection (arg=arg@entry=0x1515be0c7808) at /test/10.5_dbg/sql/sql_connect.cc:1313

#16 0x000055676edbdca8 in pfs_spawn_thread (arg=0x1515dc046508) at /test/10.5_dbg/storage/perfschema/pfs.cc:2201

#17 0x00001515de1bf6db in start_thread (arg=0x1515df246700) at pthread_create.c:463

#18 0x00001515dd5bda3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95