UglifyJS bug report attachment

build.sh

uglifyjs original.js -c -b --comments all -o commented.js
uglifyjs original.js -c -m -o min.js

commented.js

var func = function() {
    this.exec = function(req) {
        // Check method matches
        if (util.type.require(req, T.application.request), opts.methods && !util.obj.array.contains(opts.methods, req.method)) return /**
             * Fired when the route does not match
             *
             * @event mismatch
             */
        this.emit("mismatch"), this;
        // Check url matches
        var match = opts.url.match(req.url);
        return match ? this : (this.emit("mismatch"), this);
    };
};

min.js

var func=function(){this.exec=function(t){if(util.type.require(t,T.application.request),opts.methods&&!util.obj.array.contains(opts.methods,t.method))return this.emit("mismatch"),this;var i=opts.url.match(t.url);return i?this:(this.emit("mismatch"),this)}};

original.js

var func = (function(route) {
    this.exec = function(req) {
        util.type.require(req, T.application.request)
        // Check method matches
        if(opts.methods&&!util.obj.array.contains(opts.methods, req.method)) {
            /**
             * Fired when the route does not match
             *
             * @event mismatch
             */
            this.emit('mismatch')
            return this
        }
        // Check url matches
        var match = opts.url.match(req.url)
        if(!match) {
            this.emit('mismatch')
            return this
        }

        return this
    }
})