debugger keyword sometimes is not included

DEBUG is always false in production mode. Somehow it doesn’t put the “debugger” keyword in this case.

Function:

    update: function(){
        if(this.__requireSnapshot){
            debugger
            if(!DEBUG){
                location.reload();
            }
        };
        // Script to check if the planets are correct
        // _.sortBy(data.logicPlanetStore.getInBlockId(0), '_id').forEach(function(p){console.log(p._id, p.units, p.owner.username)})
        if(this.__requireUndoUpTo !== void 0){
            this.undo(this.__requireUndoUpTo);
            this.__requireUndoUpTo = void 0;
        }
        this.applyAllChanges();
    },

Minified:

update: function() {
                this.__requireSnapshot && location.reload(), void 0 !== this.__requireUndoUpTo && (this.undo(this.__requireUndoUpTo), this.__requireUndoUpTo = void 0), this.applyAllChanges()
            }

Gulp file:

gulp.task("webpack:build", ['clean-dist'], function(callback) {
    // modify some webpack config options
    var myConfig = Object.create(webpackConfig);
    myConfig.profile = true;
    myConfig.resolve.alias.phaserUnFixed = "nodeModules/phaser/build/custom/phaser-arcade-physics.min.js";
    myConfig.resolve.alias.react = "nodeModules/react/dist/react-with-addons.min.js";
    myConfig.resolve.alias.lodash = "nodeModules/lodash/dist/lodash.compat.min.js";
    myConfig.resolve.alias.moment = "nodeModules/moment/min/moment.min.js";
    myConfig.custom.DEBUG = false;
    // Try min files first (From: https://github.com/webpack/webpack/issues/615)
    myConfig.resolve.extensions.splice(1, 0, ".min.js");
    myConfig.plugins = myConfig.plugins.concat(
        new webpack.DefinePlugin({
            "process.env": {
                // This has effect on the react lib size
                "NODE_ENV": JSON.stringify("production")
            }
        }),
        new webpack.optimize.OccurenceOrderPlugin({
            preferEntry: true
        }),
        new webpack.optimize.DedupePlugin(),
        new webpack.optimize.UglifyJsPlugin({
            sourceMap : false,
            compress  : true,
            exclude   : './src/server'
        }),
        // Renders stats.json in dist
        function() {
            this.plugin("done", function(stats) {
                var jsonStats = stats.toJson({
                    chunkModules: true,
                });
                // Analyze here: http://webpack.github.io/analyse/
                require("fs").writeFileSync(path.join(__dirname, "dist", "stats.json"), JSON.stringify(jsonStats));
            });
        }
    );

    // run webpack
    webpack(myConfig, function(err, stats) {
        if(err) throw new gutil.PluginError("webpack:build", err);
        gutil.log("[webpack:build]", stats.toString({
            colors: true
        }));

        // Copy image in preloader
        var mkpath   = require('mkpath');
        var image = 'Bit_Planets_symbol_white.png';
        var path     = '/assets/images/brand/Logo/'
        var distPath = './dist' + path;
        var srcPath  = './src' + path;
        mkpath.sync(distPath, 0700);
        var fs = require('fs');
        fs.createReadStream(srcPath+image).pipe(fs.createWriteStream(distPath+image));

        // Not used for now. But would delete the .js file related to the .css generated.
        gulp.start('clean-extra-css-js', callback);
    });
});

I think this is the only relevant code for webpack:

module.exports.plugins = [
    new ExtractTextPlugin("[chunkhash].css", {
        allChunks: true
    }),
    new HtmlWebpackPlugin({
        // templateContent: makeIndexHtml()
        template: 'src/assets/index.html',
        custom: module.exports.custom
    })
]