-- main.mcl --
$x = "top-level"
func f1() {
	$x + "1"
}
$f2 = func() {
	$x + "2"
}
$call_f1 = func($x) {
	f1() + $x
}
$call_f2 = func($x) {
	$f2() + $x
}
$name1 = $call_f1("!")
$name2 = $call_f2("?")
test "${name1}" {}
test "${name2}" {}
-- OUTPUT --
Vertex: test[top-level1!]
Vertex: test[top-level2?]