-- in.cue --
root: {
	a: {
		$id:    "valToOut"
		$after: c.$id
	}
	b: {
		$id:    "valToOut"
		$after: a.$id
		out:    "foo"
	}
	c: {
		$id: "valToOut"
		in:  b.out
	}
}
-- out/run/errors --
error: cyclic task dependency:
	task root.a refers to
	task root.c refers to
	task root.b refers to
	task root.a:
    ./testdata/in.cue:2:2
    ./testdata/in.cue:6:2
    ./testdata/in.cue:11:2
-- out/run/t0 --
graph TD
  t0("root.a [Waiting]")
  t0-->t2
  t1("root.b [Waiting]")
  t1-->t0
  t2("root.c [Waiting]")
  t2-->t1

-- out/run/stats/totals --
Leaks:  0
Freed:  0
Reused: 0
Allocs: 0
Retain: 0

Unifications: 0
Conjuncts:    0
Disjuncts:    0