Crash in ./mtr --skip-innodb-fast-shutdown innodb.temporary_tables

./mtr --mysqld=--skip-innodb-fast-shutdown innodb.temporary_table

innodb.temporary_table 'innodb'          [ fail ]

        Test ended at 2020-10-09 12:35:53

CURRENT_TEST: innodb.temporary_table

Server [mysqld.1 - pid: 1837431, winpid: 1837431, exit: 256] failed during test run

Server log from this test:

…

2020-10-09 12:35:52 0 [Note] mariadbd: O_TMPFILE is not supported on /dev/null/nonexistent (disabling future attempts)

2020-10-09 12:35:52 0 [ERROR] mariadbd: Can't create/write to file '/dev/null/nonexistent/ibfxyqA9' (Errcode: 20 "Not a directory")

2020-10-09 12:35:52 0 [ERROR] InnoDB: Unable to create temporary file; errno: 20

2020-10-09 12:35:52 0 [ERROR] mariadbd: Can't create/write to file '/dev/null/nonexistent/ibieeQKc' (Errcode: 20 "Not a directory")

2020-10-09 12:35:52 0 [ERROR] InnoDB: Unable to create temporary file; errno: 20

2020-10-09 12:35:52 0 [ERROR] InnoDB: Plugin initialization aborted at srv0start.cc[1279] with error Generic error

mariadbd: /mariadb/10.5/storage/innobase/include/sync0types.h:414: void OSMutex::enter(): Assertion `!m_freed' failed.

diff --git a/mysql-test/suite/innodb/t/temporary_table.test b/mysql-test/suite/innodb/t/temporary_table.test

index 8e3ddf95634..389e106a345 100644

--- a/mysql-test/suite/innodb/t/temporary_table.test

+++ b/mysql-test/suite/innodb/t/temporary_table.test

@@ -131,7 +131,7 @@ AND support IN ('YES', 'DEFAULT', 'ENABLED');

 # We cannot use include/restart_mysqld.inc in this particular test,

 # because SHOW STATUS would fail due to unwritable (nonexistent) tmpdir.

 --source include/shutdown_mysqld.inc

---exec echo "restart: --tmpdir=/dev/null/nonexistent" > $_expect_file_name

+--exec echo "restart: --tmpdir=/dev/null/nonexistent --skip-innodb-fast-shutdown" > $_expect_file_name

 --enable_reconnect

 --disable_result_log

 --disable_query_log

diff --git a/storage/innobase/srv/srv0start.cc b/storage/innobase/srv/srv0start.cc

index 3481df9160b..59ed743b087 100644

--- a/storage/innobase/srv/srv0start.cc

+++ b/storage/innobase/srv/srv0start.cc

@@ -2076,8 +2076,9 @@ void innodb_preshutdown()

     better prevent any further changes from being buffered. */

     innodb_change_buffering= 0;

-    while (trx_sys.any_active_transactions())

-      os_thread_sleep(1000);

+    if (trx_sys.is_initialised())

+      while (trx_sys.any_active_transactions())

+        os_thread_sleep(1000);

   }

   srv_shutdown_bg_undo_sources();

   srv_purge_shutdown();