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Uncaught TypeError: Cannot set property '6' of undefined


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Was following codevinsky's flappy bird tutorial and this error showed up on the chrome dev tool. Here's the line that shows up when I press the error:

Object.defineProperty(Phaser.Sprite.prototype, "exists", {    get: function () {        return !!this._cache[6];    },    set: function (value) {        if (value)        {            //  exists = true            this._cache[6] = 1;            if (this.body && this.body.type === Phaser.Physics.P2JS)            {                this.body.addToWorld();            }            this.visible = true;        }        else        {            //  exists = false            this._cache[6] = 0;            if (this.body && this.body.type === Phaser.Physics.P2JS)            {                this.body.removeFromWorld();            }            this.visible = false;        }    }});

Here's the relevant part of code in the scoreboard.js prefab and says it has an error in line I highlighted. But the above error shows up first in chrome's dev tool. I don't think I made any typo or:

'use strict';var Scoreboard = function(game) {    var gameover;    Phaser.Group.call(this, game);    gameover = this.create(this.game.width / 2, 100, 'gameover');    gameover.anchor.setTo(0.5, 0.5);        this.scoreboard = this.create(this.game.width / 2, 200, 'scoreboard');    this.scoreboard.anchor.setTo(0.5, 0.5);        this.scoreText = this.game.add.bitmapText(this.scoreboard.width, 180, 'flappyfont', '', 18);    this.add(this.scoreText);        this.bestScoreText = this.game.add.bitmapText(this.scoreboard.width, 230, 'flappyfont', '', 18);    this.add(this.bextScoreText);        this.startButton = this.game.add.button(this.game.width / 2, 300, 'startButton', this.startClick, this);    this.startButton.anchor.setTo(0.5, 0.5);        this.add(this.startButton);        this.y = this.game.height;    this.x = 0;  };

I would appreciate any help. Maybe this code isn't supported in Phaser 2.1.1 anymore?

 

EDIT: So I just noticed that the colors weren't chancing for the highlighted part so I'll just post here what line the error pointed to:

 

this._cache[6] = 1;

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