writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopySource), r.URL)
		return
	}

	if vid != "" && vid != nullVersionID {
		_, err := uuid.Parse(vid)
		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, VersionNotFound{
				Bucket:    srcBucket,
				Object:    srcObject,
				VersionID: vid,
			}), r.URL)
			return
		}
	}

	return !input.unmarshaled
}

// UnmarshalXML - decodes XML data.
func (input *InputSerialization) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	// Make subtype to avoid recursive UnmarshalXML().
	type subInputSerialization InputSerialization
	parsedInput := subInputSerialization{}
	if err := d.DecodeElement(&parsedInput, &start); err != nil {
		return errMalformedXML(err)
	}

	doneCh := make(chan error, 1)
	defer xioutil.SafeClose(doneCh)

	// Save rebalance.bin periodically.
	go func() {
		// Update rebalance.bin periodically once every 5-10s, chosen randomly
		// to avoid multiple pool leaders herding to update around the same
		// time.
		r := rand.New(rand.NewSource(time.Now().UnixNano()))
		randSleepFor := func() time.Duration {

	// dynamic sleeper to avoid thundering herd for trash folder expunge routine
	deleteCleanupSleeper = newDynamicSleeper(5, 25*time.Millisecond, false)

	// dynamic sleeper for multipart expiration routine

			} else {
				return fmt.Errorf("Could not convert %s to a boolean", a.String())
			}

		default:
			return errCmpMismatchedTypes
		}
		return nil

	case !okA && okB:
		// swap arguments to avoid repeating code
		return inferTypesForCmp(b, a)

	default:
		// Does not happen
		return nil
	}
}

// Value arithmetic functions: we do not expose them outside the

	// - missing format.json (unformatted drive)
	// - format.json is valid but invalid 'uuid'
	if err = p.checkDiskStale(); err != nil {
		return ctx, done, err
	}

	// Disallow recursive tracking to avoid deadlocks.
	if ctx.Value(healthDiskCtxKey{}) != nil {
		done = p.updateStorageMetrics(s, paths...)
		return ctx, done, nil
	}

	if contextCanceled(ctx) {
		return ctx, done, ctx.Err()
	}

}

func (ies *IAMEtcdStore) loadPolicyDocs(ctx context.Context, m map[string]PolicyDoc) error {
	ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
	defer cancel()
	//  Retrieve all keys and values to avoid too many calls to etcd in case of
	//  a large number of policies
	r, err := ies.client.Get(ctx, iamConfigPoliciesPrefix, etcd.WithPrefix())
	if err != nil {
		return err
	}

				continue
			}
			if best == nil {
				best = other
				bestIdx = otherIdx
				continue
			}
			// We should make sure to avoid objects and directories
			// of this fashion such as
			//  - foo-1
			//  - foo-1/
			// we should avoid this situation by making sure that
			// we compare the `foo-1/` after path.Clean() to
			// de-dup the entries.

// NewReader then it should be set to -1.
// When size is >=0 it *must* match the amount of data provided by r.
//
// NewReader may try merge the given size, MD5 and SHA256 values
// into src - if src is a Reader - to avoid computing the same
// checksums multiple times.
// NewReader enforces S3 compatibility strictly by ensuring caller
// does not send more content than specified size.

		Status:      fi.TransitionStatus,
		FreeVersion: fi.TierFreeVersion(),
		Tier:        fi.TransitionTier,
	}

	// etag/md5Sum has already been extracted. We need to
	// remove to avoid it from appearing as part of
	// response headers. e.g, X-Minio-* or X-Amz-*.
	// Tags have also been extracted, we remove that as well.
	objInfo.UserDefined = cleanMetadata(fi.Metadata)

	// All the parts per object.