getting an error like of malloc_error_break - ios

Question

While reloading a tableView the app crashes and I am getting error
malloc:
error for object 0x7f8c7b99be80: pointer being freed was not allocated
set a breakpoint in malloc_error_break to debug
I have set the Symbolic breakpoint for
malloc_error_break
Also try to find memory leakage with "Instruments" but it just showing same error in console but here is no any memory leakage.
How to solve this issue.
(I am using 8.3 SDK and 6.3.1 Xcode)
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var ResultCellIdentifier = "placementID"
var LoadCellIdentifier = "LoadingCell"
var count = self.arrayOfAllData.count as NSInteger
if count == 0 && indexPath.row == 0 {
let cell = tableView.dequeueReusableCellWithIdentifier("LoadingCell") as! UITableViewCell
return cell
}
else {
let cell = tableView.dequeueReusableCellWithIdentifier("placementID") as! PlacementsTableViewCell
indexPATH = indexPath
var tweet = self.arrayOfAllData.objectAtIndex(indexPath.row) as! NSDictionary
let created_at = tweet.valueForKey("created_at") as? NSString
var dateArray : NSArray = created_at!.componentsSeparatedByString(" ")
if dateArray.count != 0 {
let month = dateArray.objectAtIndex(1) as! String
let date = dateArray.objectAtIndex(2) as! String
cell.timeLabel.text = String(format: "%# %#", date,month)
}
///////////any url present in tweet text
var entities = NSDictionary()
entities = tweet.valueForKey("entities") as! NSDictionary
var urlsArray = entities.valueForKey("urls") as! NSArray
if urlsArray.count == 0 {
}else {
for item in urlsArray as! [NSDictionary] {
let expanded_url = item.valueForKey("expanded_url") as? String
}
}
///////////
var tweet_id_str = NSString()
var user_id_str = NSString()
var data = NSData()
// var name = NSString()
///////////count of retweets
var retweet_count = tweet.valueForKey("retweet_count") as! NSInteger
var retweeted_status = tweet.valueForKey("retweeted_status") as! NSDictionary
var favorite_count = retweeted_status.valueForKey("favorite_count") as! NSInteger
///////////tweet id
tweet_id_str = retweeted_status.valueForKey("id_str") as! NSString
if retweeted_status.isEqual(nil) {
}
else {
var user = retweeted_status.valueForKey("user") as! NSDictionary
///////////last update
let created_at = retweeted_status.valueForKey("created_at") as! NSString
///////////
///////////user name who added this tweet
cell.titleLabel.text = user.valueForKey("name") as? String
///////////user id who added this tweet
user_id_str = user.valueForKey("id_str") as! NSString
///////////screen name
let screen_name = user.valueForKey("screen_name") as! NSString
var followers_count = user.valueForKey("followers_count") as! NSInteger
///////////profile image of the tweet
cell.avatarImageView.image = UIImage(named: "Twitter Avatar.jpg")
let profile_image_url = user.valueForKey("profile_image_url") as! NSString
var imageUrl = NSURL(string: profile_image_url as String)
let request: NSURLRequest = NSURLRequest(URL: imageUrl!)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {(response: NSURLResponse!,data: NSData!,error: NSError!) -> Void in
if error == nil {
if data != nil {
var image = UIImage(data: data)
cell.avatarImageView.image = image
}
}
})
if retweet_count >= 5 || favorite_count >= 15 || followers_count >= 30000 {
cell.featuredImageView.hidden = false
cell.featuredImageView.image = UIImage(named: "new feature star")
}
else {
cell.featuredImageView.hidden = true
}
}
cell.mailLabel.text = ""
let tweetText = tweet.valueForKey("text") as? NSString
cell.beattypeLabel.text = tweetText as? String
if tweetText?.containsString("#gmail") == true{
NSLog("Mail id is present at index : %d", indexPath.row)
var words = NSArray()
words = NSArray(array: tweetText!.componentsSeparatedByString(" "))
var mailAddress = NSString()
for var i = 0; i < words.count; i++ {
var mailAdd = words.objectAtIndex(i) as! NSString
if mailAdd.rangeOfString("#gmail").location != NSNotFound {
NSLog("mail Address : %#", mailAdd)
if mailAdd.rangeOfString(".com").location == NSNotFound {
var lastChar = mailAdd.characterAtIndex(mailAdd.length-1)
var lastCharStr:NSString = NSString(format: "%ch", lastChar)
mailAddress = mailAdd.stringByAppendingString(".com")
}
}
}
}
return cell
}
}
at the same time Thread 1 showing this
http://i.stack.imgur.com/2YoQp.jpg
(please go through this image)

Answer 1

use
var cell = tableView.dequeueReusableCellWithIdentifier("placementID") as! PlacementsTableViewCell
if cell.isEqual(nil) {
cell = PlacementsTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "placementID")
}
instead of
let cell = tableView.dequeueReusableCellWithIdentifier("placementID") as! PlacementsTableViewCell
and change downloading image in other thread like follow
let qualityOfServiceClass = QOS_CLASS_BACKGROUND
let backgroundQueue = dispatch_get_global_queue(qualityOfServiceClass, 0)
dispatch_async(backgroundQueue, {
println("This is run on the background queue")
var imageData = NSData(contentsOfURL: imageUrl!)
var image = UIImage(data: imageData!)
dispatch_async(dispatch_get_main_queue(), { () -> Void in
println("This is run on the main queue, after the previous code in outer block")
cell.avatarImageView.image = image
})
})