/bin/sh (ash) incorrectly parse command lists if
	any (but not first) of list components marked as 'background',
	f.e construction

	{ a; b; c & d; e; }

	parsed as if it was

	{ { a; b; c; } & d; e; }

	All other shells which I can test parse this
	as

	{ a; b; { c& } ; d; e; }

	(including /bin/sh in NetBSD-current which is
	 originated from the same sources as FreeBSD one)

Fix: Applay the patch.
(Here is the result of
How-To-Repeat: 
	Try this one:

#!/bin/sh
while true
do
	date +'1:%H:%M:%S'
	sleep 2
	exit
	ps jx &
	date +'2:%H:%M:%S'
	sleep 3
	exit
done

	(while ... do ... done is here to force using
	command-list )