lines          = strings.Split(crash, "\n")
	)
	for i := 0; i < len(lines); i++ {
		line := lines[i]

		// Read sentinel value.
		if parentSentinel == 0 && strings.HasPrefix(line, "sentinel ") {
			_, err := fmt.Sscanf(line, "sentinel %x", &parentSentinel)
			if err != nil {
				return nil, fmt.Errorf("can't read sentinel line")
			}
			continue
		}

	t.Helper()
	type event map[string]any

	// Parse into events, one per line.
	parseEvents := func(b []byte) ([]event, []string) {
		t.Helper()
		var events []event
		var lines []string
		for _, line := range bytes.SplitAfter(b, []byte("\n")) {
			if len(line) > 0 {
				line = bytes.TrimSpace(line)
				var e event
				err := json.Unmarshal(line, &e)
				if err != nil {
					t.Errorf("unmarshal %s: %v", b, err)

	return jsonTag
}

// A buffer of lines that will be written.
type bufferedLine struct {
	line        string
	indentation int
}

type buffer struct {
	lines []bufferedLine
}

func newBuffer() *buffer {
	return &buffer{
		lines: make([]bufferedLine, 0),
	}
}

func (b *buffer) addLine(line string, indent int) {
	b.lines = append(b.lines, bufferedLine{line, indent})
}

                return false;
            }
        }
        return true;
    }

    /**
     * Finds all the lines in the actual line that match any line in the expected list.
     *
     * @return a map of expected line index to a list of all actual line indices that match the expected line
     */
    private static Map<Integer, List<Integer>> findMatchingLines(List<String> expectedLines, List<String> actualLines) {

		if 0 < b && b < e {
			// list spans multiple lines
			n := 0 // multi-line element count
			line := b
			for _, x := range list {
				xb := p.lineFor(x.Pos())
				xe := p.lineFor(x.End())
				if line < xb {
					// x is not starting on the same
					// line as the previous one ended
					return true
				}
				if xb < xe {
					// x is a multi-line element
					n++
				}
				line = xe

		if err != nil {
			return nil, err
		}

		lines := strings.SplitAfter(string(content), "\n")
		active := false
		for lineno, line := range lines {
			lineno++

			// Ignore comments and commented-out code.
			if i := strings.Index(line, "//"); i >= 0 {
				line = line[:i]
			}
			line = strings.TrimSpace(line)

			// We start checking code at a TEXT line for a frameless function.

		"",
	}

	if len(lines) > len(patterns) {
		t.Errorf("Expecting %d lines of output, but got %d", len(patterns), len(lines))

		for i := len(patterns); i < len(lines); i++ {
			t.Errorf("  Extra line of output: %s", lines[i])
		}
	}

	for i, pat := range patterns {
		t.Run(strconv.Itoa(i), func(t *testing.T) {
			match, _ := regexp.MatchString(pat, lines[i])
			if !match {

	}
	lines := strings.Split(ename, "\n")
	var lastPath string // empty or ends with .
	for i, line := range lines {
		path, rest := cutLastDot(line)
		if len(path) == 0 {
			continue // unchanged
		}
		if len(path) == 1 && path[0] == '"' {
			lines[i] = lastPath + rest
		} else {
			lastPath = path + "."
			// line unchanged
		}
	}
	return strings.Join(lines, "\n") // trailing \n?
}

                buildscript {
                    // line 2
                }""".replaceIndent()
            )
        )
    }

    @Test
    fun `given ranges linePreservingBlankRange should blank lines`() {
        val original = """
            |// line 1
            |// line 2
            |buildscript {
            |    // line 4
            |}
            |// line 6
            |plugins {
            |    // line 8

    /** Calculate an incremental Id for a given string. */
    private Integer getIdByLine(String line) {
        int newId = stringList.size();
        Integer existingId = stringToId.put(line, newId);
        if (existingId == null) {
            stringList.add(line);
            return newId;
        } else {
            stringToId.put(line, existingId);
            return existingId;
        }
    }