diff --git a/sql/item_func.cc b/sql/item_func.cc

index 89ca25b..77bcf22 100644

--- a/sql/item_func.cc

+++ b/sql/item_func.cc

@@ -4584,6 +4584,7 @@ longlong Item_func_sleep::val_int()

   }

   thd_wait_end(thd);

   mysql_mutex_unlock(&LOCK_item_func_sleep);

+  sleep(3);

   mysql_mutex_lock(&thd->mysys_var->mutex);

   thd->mysys_var->current_mutex= 0;

   thd->mysys_var->current_cond=  0;

diff --git a/sql/mysqld.cc b/sql/mysqld.cc

index 7773660..860e4c3 100644

--- a/sql/mysqld.cc

+++ b/sql/mysqld.cc

@@ -1760,7 +1760,7 @@ static void close_connections(void)

   */

   DBUG_PRINT("info", ("thread_count: %d", thread_count));

-  for (int i= 0; *(volatile int32*) &thread_count && i < 1000; i++)

+  for (int i= 0; *(volatile int32*) &thread_count && i < 100; i++)

     my_sleep(20000);

   /*

CREATE PROCEDURE p1() SELECT SLEEP(10);

send CALL p1();

2019-01-27 18:41:59 139629072766720 [Note] /data/src/10.2-bug/sql/mysqld (initiated by: root[root] @ localhost [127.0.0.1]): Normal shutdown

2019-01-27 18:41:59 139629072766720 [Note] Event Scheduler: Purging the queue. 0 events

2019-01-27 18:42:01 139629072766720 [Warning] /data/src/10.2-bug/sql/mysqld: Forcing close of thread 4  user: 'root'

mysqld: /data/src/10.2-bug/sql/protocol.cc:155: bool net_send_error(THD*, uint, const char*, const char*): Assertion `!thd->spcont' failed.

190127 18:42:01 [ERROR] mysqld got signal 6 ;

#7  0x00007efdf323cee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x0000565482973c2d in net_send_error (thd=0x7efddc000b00, sql_errno=1053, err=0x5654868bad39 "Server shutdown in progress", sqlstate=0x0) at /data/src/10.2-bug/sql/protocol.cc:155

#9  0x000056548295c147 in close_connection (thd=0x7efddc000b00, sql_errno=1053) at /data/src/10.2-bug/sql/mysqld.cc:2830

#10 0x0000565482959b70 in close_connections () at /data/src/10.2-bug/sql/mysqld.cc:1794

#11 0x000056548295a330 in kill_server (sig_ptr=0x0) at /data/src/10.2-bug/sql/mysqld.cc:2019

#12 0x000056548295a3ab in kill_server_thread (arg=0x7efded5ace00) at /data/src/10.2-bug/sql/mysqld.cc:2051

#13 0x0000565482fb1f98 in pfs_spawn_thread (arg=0x7efde4001360) at /data/src/10.2-bug/storage/perfschema/pfs.cc:1862

#14 0x00007efdf4f13494 in start_thread (arg=0x7efded485700) at pthread_create.c:333

#15 0x00007efdf32f993f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Some pointers may be invalid and cause the dump to abort.

Query (0x7efddc07be48): SELECT SLEEP(10)

Connection ID (thread ID): 4

Status: KILL_SERVER