Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial


oriah knorr
oriah knorr
5,474 Points

Thread 1: breakpoint 3.3 crashs my app when i try to run it

Keep getting a "Thread 1: breakpoint 3.3" outlined in green next to my "let factBook = FactBook()" line. Iv been this vid for and hour and a half and made no progress due to this error. I have looked around on form pages and have found nothing for this specific error.


import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var funFactLabel: UILabel!

    let factBook = FactBook()

    override func viewDidLoad() {
        // Do any additional setup after loading the view, typically from a nib.
        funFactLabel.text = factBook.factsArray[0]    }

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

    @IBAction func showFunFact() {
        funFactLabel.text = factBook.factsArray[1]
import Foundation

struct FactBook {
    let factsArray = [
        "Ants stretch when they wake up in the morning.",
        "Ostriches can run faster than horses.",
        "Olympic gold medals are actually made mostly of silver.",
        "You are born with 300 bones; by the time you are an adult you will have 206.",
        "It takes about 8 minutes for light from the Sun to reach Earth.",
        "Some bamboo plants can grow almost a meter in just one day.",
        "The state of Florida is bigger than England.",
        "Some penguins can leap 2-3 meters out of the water.",
        "On average, it takes 66 days to form a new habit.",
        "Mammoths still walked the earth when the Great Pyramid was being built."

I don't see any direct errors pop up in this code.

1 Answer

Michael Hulet
Michael Hulet
47,911 Points

You can set a breakpoint to have the debugger automatically pause your code's execution when it gets to that line, so that you can do things like inspect variables at that time. In order to have the debugger stop pausing your code, click on the blue arrow on the very left of that line and select either "Delete Breakpoint" or "Disable Breakpoint"