EXC_BREAKPOINT fast access triggers

Here is my code (largeAsteroids.count is never 0):

var largeAsteroids=[[SKTexture]]()
func randomLargeAsteroidTextures()->Array<SKTexture>{
        let i=Int(arc4random())%largeAsteroids.count
        return largeAsteroids[i]// this line triggers EXC_BREAKPOINT
    }

      

        
        
        
      

    

When I execute my code, I don't get any errors, but I get EXC_BREAKPOINT. I ensured there was no breakpoint and at the index I was a valid object.

I first changed SKTexture to AnyObject, it didn't help. Then I tried to use NSMutableArray instead of swift array, the problem still exists:

var largeAsteroids=NSMutableArray()
    func randomLargeAsteroidTextures()->AnyObject{
        let i=Int(arc4random())%largeAsteroids.count
        return largeAsteroids.objectAtIndex(i) // this line triggers EXC_BREAKPOINT
    }

      

        
        
        
      

    

update:

Problem solved, replace:

let i=Int(arc4random())%largeAsteroids.count

      

        
        
        
      

    

by:

let i=Int(arc4random_uniform(UInt32(largeAsteroids.count)))

      

        
        
        
      

    

Thanks for the solution Matt:

You should probably use arc4random_uniform. You will get a modular deviation from the current implementation. - Matt Gibson