// the first line of each function begins at column 0, while the rest is
	// indented by a tabulation. These data structures help us index the
	// output by function.
	functionMarkers := make([]int, 1)
	lineFuncMap := make(map[string]int)

	lines := strings.Split(outStr, "\n")
	rxLine := regexp.MustCompile(fmt.Sprintf(`\((%s:\d+)\)\s+(.*)`, regexp.QuoteMeta(fn)))

	for nl, line := range lines {