// ... off and running now.
	dbgtrace(1, "starting perform")

	indirs := strings.Split(*indirsflag, ",")
	vis := cov.CovDataVisitor(op)
	var flags cov.CovDataReaderFlags
	if *hflag {
		flags |= cov.PanicOnError
	}
	if *hwflag {
		flags |= cov.PanicOnWarning
	}
	reader := cov.MakeCovDataReader(vis, indirs, *verbflag, flags, matchpkg)
	st := 0
	if err := reader.Visit(); err != nil {

	pkgs := make([]string, 0, len(fm.pm))
	for importpath := range fm.pm {
		pkgs = append(pkgs, importpath)
	}

	rep := func(cov, tot uint64) error {
		if tot != 0 {
			if _, err := fmt.Fprintf(w, "coverage: %.1f%% of statements%s\n",
				100.0*float64(cov)/float64(tot), covpkgs); err != nil {
				return err
			}
		} else if noteEmpty {

	strc := string(contents)
	if err != nil {
		t.Fatalf("problems reading text file %s: %v", textfile, err)
	}
	if !strings.Contains(strc, token) {
		t.Logf("content: %s\n", string(contents))
		t.Fatalf("cov profile does not contain aux meta content %q", token)
	}