-- main.mcl --
import "fmt"

$list = ["a", "b", "c"]

$index = 42 # should be out of scope

for $index, $value in $list {
	$index = 42
	$s = fmt.printf("%s is %d", $value, $index)
	test [$s] {}
}
-- OUTPUT --
Vertex: test[a is 42]
Vertex: test[b is 42]
Vertex: test[c is 42]
