errs = multierror.Append(errs, err)
		}
	}
	filenames = []string{}
	for p := range processedFiles {
		filenames = append(filenames, p)
	}

	if errs != nil {
		// Display warnings we encountered as well
		for _, fname := range filenames {
			if w := warningsByFilename[fname]; w != nil {
				if fname == "-" {
					_, _ = fmt.Fprint(writer, warningToString(w))
					break
				}