[Exim] redirection process vanished

After installing 4.12 I noticed a number of strange messages in my
main_log I didn't have before:

2002-12-18 10:31:08 redirection process 25751 vanished unexpectedly
2002-12-18 10:41:30 redirection process 16903 vanished unexpectedly
2002-12-18 10:43:35 redirection process 8418 vanished unexpectedly
2002-12-18 10:44:34 redirection process 26184 vanished unexpectedly
2002-12-18 10:45:54 redirection process 21673 vanished unexpectedly
2002-12-18 10:53:07 redirection process 28401 vanished unexpectedly
2002-12-18 10:58:08 redirection process 2886 vanished unexpectedly
2002-12-18 10:59:01 redirection process 25073 vanished unexpectedly
2002-12-18 11:05:08 redirection process 9548 vanished unexpectedly
2002-12-18 11:07:39 redirection process 16849 vanished unexpectedly
2002-12-18 11:20:04 redirection process 17595 vanished unexpectedly

--
Kirill