}
		if !seen(p, "mutexHog1") && seen(p, "mutexHog2") && p.DurationNanos > 0 {
			break // pass
		}
		if d == 32 {
			t.Errorf("want mutexHog2 but no mutexHog1 in the profile, and non-zero p.DurationNanos, got %v", p)
		}
	}
	p, err = query("/debug/pprof/mutex")
	if err != nil {
		t.Fatalf("failed to query mutex profile: %v", err)
	}
	if !seen(p, "mutexHog1") || !seen(p, "mutexHog2") {