diff --git a/storage/innobase/row/row0quiesce.cc b/storage/innobase/row/row0quiesce.cc

index dd6289c..e75137f 100644

--- a/storage/innobase/row/row0quiesce.cc

+++ b/storage/innobase/row/row0quiesce.cc

@@ -600,6 +600,7 @@ row_quiesce_table_complete(

 		os_file_delete_if_exists(innodb_data_file_key, cfg_name, NULL);

+    my_sleep(2000000);

 		ib::info() << "Deleting the meta-data file '" << cfg_name << "'";

 	}

diff --git a/storage/innobase/trx/trx0purge.cc b/storage/innobase/trx/trx0purge.cc

index 4e51796..45afd72 100644

--- a/storage/innobase/trx/trx0purge.cc

+++ b/storage/innobase/trx/trx0purge.cc

@@ -1783,6 +1783,7 @@ trx_purge_run(void)

 {

 	rw_lock_x_lock(&purge_sys->latch);

+  my_sleep(1000000);

 	switch (purge_sys->state) {

 	case PURGE_STATE_INIT:

 	case PURGE_STATE_EXIT:

--source include/have_innodb.inc

CREATE OR REPLACE TABLE t1 (t TIMESTAMP) ENGINE=InnoDB;

FLUSH TABLE t1 FOR EXPORT;

shutdown;

2017-12-13  3:10:50 139949094012672 [Note] InnoDB: Writing table metadata to './test/t1.cfg'

2017-12-13  3:10:50 139949094012672 [Note] InnoDB: Table `test`.`t1` flushed to disk

2017-12-13  3:10:50 139948960823040 [Note] /data/src/10.2-bug/sql/mysqld (root[root] @ localhost []): Normal shutdown

2017-12-13  3:10:50 139948841735936 [Note] InnoDB: FTS optimize thread exiting.

2017-12-13  3:10:50 139948960823040 [Note] Event Scheduler: Purging the queue. 0 events

2017-12-13  3:10:52 139949094012672 [Note] InnoDB: Deleting the meta-data file './test/t1.cfg'

2017-12-13 03:10:53 0x7f4870090700  InnoDB: Assertion failure in file /data/src/10.2-bug/storage/innobase/trx/trx0purge.cc line 1837

InnoDB: We intentionally generate a memory trap.

#5  0x00007f4875dbc3fa in abort () from /lib/x86_64-linux-gnu/libc.so.6

#6  0x00005594dd7a7b88 in ut_dbg_assertion_failed (expr=0x0, file=0x5594ddc9a748 "/data/src/10.2-bug/storage/innobase/trx/trx0purge.cc", line=1837) at /data/src/10.2-bug/storage/innobase/ut/ut0dbg.cc:61

#7  0x00005594dd772f30 in trx_purge_run () at /data/src/10.2-bug/storage/innobase/trx/trx0purge.cc:1837

#8  0x00005594dd734762 in row_quiesce_table_complete (table=0x7f4818149778, trx=0x7f486bc000d8) at /data/src/10.2-bug/storage/innobase/row/row0quiesce.cc:608

#9  0x00005594dd5a7aa4 in ha_innobase::external_lock (this=0x7f4818131f88, thd=0x7f4818000b00, lock_type=2) at /data/src/10.2-bug/storage/innobase/handler/ha_innodb.cc:16324

#10 0x00005594dd28ecdc in handler::ha_external_lock (this=0x7f4818131f88, thd=0x7f4818000b00, lock_type=2) at /data/src/10.2-bug/sql/handler.cc:5903

#11 0x00005594dd399776 in unlock_external (thd=0x7f4818000b00, table=0x7f481816d628, count=1) at /data/src/10.2-bug/sql/lock.cc:719

#12 0x00005594dd398c4e in mysql_unlock_tables (thd=0x7f4818000b00, sql_lock=0x7f481816d610, free_lock=true) at /data/src/10.2-bug/sql/lock.cc:429

#13 0x00005594dd398bb9 in mysql_unlock_tables (thd=0x7f4818000b00, sql_lock=0x7f481816d610) at /data/src/10.2-bug/sql/lock.cc:418

#14 0x00005594dcf9c46b in close_thread_tables (thd=0x7f4818000b00) at /data/src/10.2-bug/sql/sql_base.cc:840

#15 0x00005594dcf9edf0 in Locked_tables_list::unlock_locked_tables (this=0x7f4818004510, thd=0x7f4818000b00) at /data/src/10.2-bug/sql/sql_base.cc:2154

#16 0x00005594dcfc61cd in THD::cleanup (this=0x7f4818000b00) at /data/src/10.2-bug/sql/sql_class.cc:1453

#17 0x00005594dcf30b25 in unlink_thd (thd=0x7f4818000b00) at /data/src/10.2-bug/sql/mysqld.cc:2904

#18 0x00005594dcf30fc6 in one_thread_per_connection_end (thd=0x7f4818000b00, put_in_cache=true) at /data/src/10.2-bug/sql/mysqld.cc:3049

#19 0x00005594dd15843a in do_handle_one_connection (connect=0x5594e07220c0) at /data/src/10.2-bug/sql/sql_connect.cc:1373

#20 0x00005594dd1580de in handle_one_connection (arg=0x5594e07220c0) at /data/src/10.2-bug/sql/sql_connect.cc:1260

#21 0x00005594dd576a76 in pfs_spawn_thread (arg=0x5594e072c630) at /data/src/10.2-bug/storage/perfschema/pfs.cc:1863

#22 0x00007f4877a8a494 in start_thread (arg=0x7f4870090700) at pthread_create.c:333

#23 0x00007f4875e7093f in clone () from /lib/x86_64-linux-gnu/libc.so.6