Swift 2 (Xcode 7) Bad address on accessing chart view

[arinhouck]

error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=2, address=0x1a1f14400).
The process has been returned to the state before expression evaluation.

pieChartView is defined according to debugger

(lldb) po pieChartView
<UIView: 0x15820de90; frame = (0 0; 375 667); autoresize = W+H; tintColor = UIDeviceRGBColorSpace 0 0.65098 0.352941 1; layer = <CALayer: 0x1582037d0>>

Controller

//
//  PieChartViewController.swift
//  gradebuildr
//
//  Created by Arin Houck on 11/21/15.
//  Copyright © 2015 Gradebuildr. All rights reserved.
//

import UIKit
import Charts

class PieChartViewController: UIViewController {

    var weights: [String]!

    @IBOutlet weak var pieChartView: PieChartView!

    override func viewDidLoad() {
        super.viewDidLoad()
        weights = ["Assignments", "Homework", "Exam"]
        let percentages = [25.0, 50.0, 25.0]
        setChart(weights, values: percentages)

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    func setChart(dataPoints: [String], values: [Double]) {
        pieChartView.noDataText = "You need to provide data for the chart."
        pieChartView.centerText = "20%"
        pieChartView.centerTextColor = UIColor.whiteColor()
        pieChartView.descriptionText = ""
        pieChartView.animate(xAxisDuration: 1.5)
        pieChartView.legend.enabled = false
        pieChartView.userInteractionEnabled = false
        pieChartView.backgroundColor = UIColor(red: 51/255.0, green: 51/255.0, blue: 51/255.0, alpha: 1.0)
        pieChartView.holeColor = UIColor(red: 51/255.0, green: 51/255.0, blue: 51/255.0, alpha: 1.0)

        var dataEntries: [ChartDataEntry] = []

        for i in 0..<dataPoints.count {
            let dataEntry = ChartDataEntry(value: values[i], xIndex: i)
            dataEntries.append(dataEntry)
        }

        let pieChartDataSet = PieChartDataSet(yVals: dataEntries, label: "%")
        let pieChartData = PieChartData(xVals: dataPoints, dataSet: pieChartDataSet)
        pieChartView.data = pieChartData
        pieChartView.data?.setValueTextColor(UIColor.clearColor())

        let colors = [UIColor.blackColor(), UIColor(red: 251/255.0, green: 38/255.0, blue: 108/255.0, alpha: 1.0)]
        pieChartDataSet.colors = colors
    }

}

Crashes on this line: pieChartView.noDataText = "You need to provide data for the chart."
However it just crashes on any method or variable accessed through the PieChartView.

[pmairoldi]

Your IBOutlet is probably not set.

[arinhouck]

Still learning the ropes of Swift. Turned out, I was forcing the PieChartView on the outlet however I did not actually change the UIView class to PieChartView and the module to Charts