-- main.mcl --
$x = "i am x"	# i am top-level

class c2() {
	$z = "i am y and " + $x

	#$x = $x		# not allowed
	$tmpx = $x		# this $x is actually from below, not from the parent scope!
	#$x = $x + "wow"	# allowed?
	$x = $tmpx + "wow"	# circular with itself ($x) in this scope!
}

include c2 as f1

test $f1.z {}
test $f1.x {}	# tricky
test $f1.newx {}

-- OUTPUT --
# err: errSetScope: recursive reference while setting scope: not a dag