<commit_before>var utils = require("./utils.js");

var LessError = module.exports = function LessError(e, importManager, currentFilename) {

    var filename = e.filename || currentFilename;

    if (importManager && filename) {
        var input = importManager.contents[filename],
            loc = utils.getLocation(e.index, input),
            line = loc.line,
            col  = loc.column,
            callLine = e.call && utils.getLocation(e.call, input).line,
            lines = input.split('\n');

        this.type = e.type || 'Syntax';
        this.filename = filename;
        this.index = e.index;
        this.line = typeof(line) === 'number' ? line + 1 : null;
        this.callLine = callLine + 1;
        this.callExtract = lines[callLine];
        this.column = col;
        this.extract = [
            lines[line - 1],
            lines[line],
            lines[line + 1]
        ];
    }
    this.message = e.message;
    this.stack = e.stack;
};

LessError.prototype = new Error();
LessError.prototype.constructor = LessError;
<commit_msg>Fix memory leak in error. Fixes #2025<commit_after>var utils = require("./utils.js");

var LessError = module.exports = function LessError(e, importManager, currentFilename) {

    Error.call(this);

    var filename = e.filename || currentFilename;

    if (importManager && filename) {
        var input = importManager.contents[filename],
            loc = utils.getLocation(e.index, input),
            line = loc.line,
            col  = loc.column,
            callLine = e.call && utils.getLocation(e.call, input).line,
            lines = input.split('\n');

        this.type = e.type || 'Syntax';
        this.filename = filename;
        this.index = e.index;
        this.line = typeof(line) === 'number' ? line + 1 : null;
        this.callLine = callLine + 1;
        this.callExtract = lines[callLine];
        this.column = col;
        this.extract = [
            lines[line - 1],
            lines[line],
            lines[line + 1]
        ];
    }
    this.message = e.message;
    this.stack = e.stack;
};

LessError.prototype = Object.create(Error.prototype);
LessError.prototype.constructor = LessError;

{'fraction_non_alphanumeric': 0.13333333333333333, 'fraction_numerical': 0.005479452054794521, 'mean_word_length': 2.1210826210826212, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5487181', 'n_tokens_mistral': 645, 'n_tokens_neox': 637, 'n_words': 142}