// slower, safer thing by iterating over each bit individually.
	for i := uint(0); i < 64; i++ {
		if c.cache&(1<<i) != 0 {
			p.chunkOf(ci).free1(pi + i)

			// Update density statistics.
			p.scav.index.free(ci, pi+i, 1)
		}
		if c.scav&(1<<i) != 0 {
			p.chunkOf(ci).scavenged.setRange(pi+i, 1)
		}
	}

	// Since this is a lot like a free, we need to make sure