si.AllocRange(PageBase(BaseChunkIdx, 0), PageBase(BaseChunkIdx+64, 0))
		si.NextGen()
		si.FreeRange(PageBase(BaseChunkIdx, 0), PageBase(BaseChunkIdx+64, 0))
		for ci := BaseChunkIdx; ci < BaseChunkIdx+64; ci++ {
			si.SetEmpty(ci)
		}
		si.ResetSearchAddrs()

		// Create and return test functions.
		mark = func(base, limit uintptr) {
			t.Helper()

			si.AllocRange(base, limit)
			si.FreeRange(base, limit)
		}

			a.StoreUnmark(addr, addr)
		}
		a.Clear()
	}
	s.i.freeHWM = minOffAddr
}

func (s *ScavengeIndex) NextGen() {
	s.i.nextGen()
}

func (s *ScavengeIndex) SetEmpty(ci ChunkIdx) {
	s.i.setEmpty(chunkIdx(ci))
}

func CheckPackScavChunkData(gen uint32, inUse, lastInUse uint16, flags uint8) bool {
	sc0 := scavChunkData{
		gen:            gen,
		inUse:          inUse,