"test.TestCallbackCallers",
		"testing.tRunner",
		"runtime.goexit",
	}
	nestedCall(func() {
		n = runtime.Callers(4, pc)
	})
	if n != len(name) {
		t.Errorf("expected %d frames, got %d", len(name), n)
	}
	for i := 0; i < n; i++ {
		f := runtime.FuncForPC(pc[i] - 1) // TODO: use runtime.CallersFrames
		if f == nil {
			t.Fatalf("expected non-nil Func for pc %d", pc[i])
		}