src/cmd/compile/internal/ssa/testdata/i22558.go
19:	func test(t *thing, u *thing) {
20:		if t.next != nil {
23:		fmt.Fprintf(os.Stderr, "%s\n", t.name)
24:		u.self = u
25:		t.self = t
26:		t.next = u
27:		for _, p := range t.stuff {
28:			if isFoo(t, p) {
29:				return
44:	}