Language: Go
Label: safe
CWE: CWE-400 \u2014 Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

Code:
func (s *shard) bitmap() ([]byte, error) {
	bm, err := bitfield.NewBitfield(s.size)
	if err != nil {
		return nil, err
	}
	for i := 0; i < s.size; i++ {
		if _, ok := s.children[i]; ok {
			bm.SetBit(i)
		}
	}
	return bm.Bytes(), nil
}