if err != nil {
		apiErr := errorCodes.ToAPIErr(ErrMalformedXML)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return
	}
	// validate the request
	if err := rreq.validate(ctx, objectAPI); err != nil {
		apiErr := errorCodes.ToAPIErr(ErrMalformedXML)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return

		// Should return ErrMalformedXML in the response body.
		{
			bucket:    bucketName,
			object:    objectName,
			uploadID:  uploadIDs[0],
			parts:     []CompletePart{},
			accessKey: credentials.AccessKey,
			secretKey: credentials.SecretKey,

			expectedContent: encodeResponse(getAPIErrorResponse(ctx,
				getAPIError(ErrMalformedXML),