RyanTCB RyanTCB - 2 months ago 25
iOS Question

Can not find reason for crash test flight

Just one of my test flight beta testers has reported a crash. I have for 2 months now been scratching my head as to why it crashes for them and no others. I am unable to replicate the crash myself so have to submit a new build through the test flight system with iTunes connect and wait for user to test it before I know if I have made progress or not. This is very slow and tedious process and so I am here to plead you for your knowledge and help me first understand why the app crashes only for this one user (of 12) .

The crash report I get from test flight is

> Incident Identifier: 64F2AB18-E3F4-48A2-A865-CCAB2FF2BF12
Beta Identifier: 5E64ED31-B493-4406-94E5-E4233A84D2A6
Hardware Model: iPhone6,2
Process: anAppName [2491]
Path: /private/var/mobile/Containers/Bundle/Application/0C971485-F0ED-4CA0-96F7-AF9EA7A71A30/anAppName.app/anAppName
Identifier: com.aCleverName.anAppName
Version: 1.0.9.8.1 (1.0)
Beta: YES
Code Type: ARM-64 (Native)
Parent Process: launchd [1]

Date/Time: 2015-10-16 11:39:04.04 +0100
Launch Time: 2015-10-16 11:38:54.54 +0100
OS Version: iOS 9.0.2 (13A452)
Report Version: 105

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000001000d6b24
Triggered by Thread: 0

Global Trace Buffer (reverse chronological seconds):
0.467279 CFNetwork 0x0000000183f919a4 TCP Conn 0x1545fb500 SSL Handshake DONE
0.722080 CFNetwork 0x0000000183f918b4 TCP Conn 0x1545fb500 starting SSL negotiation
0.722520 CFNetwork 0x0000000184033760 TCP Conn 0x1545fb500 complete. fd: 7, err: 0
0.723794 CFNetwork 0x0000000184034c8c TCP Conn 0x1545fb500 event 1. err: 0
0.761090 CFNetwork 0x0000000184034d64 TCP Conn 0x1545fb500 started
0.764039 CFNetwork 0x000000018408a5a4 Creating default cookie storage with default identifier
0.764039 CFNetwork 0x000000018408a570 Faulting in CFHTTPCookieStorage singleton
0.764039 CFNetwork 0x00000001840dc498 Faulting in NSHTTPCookieStorage singleton
6.422985 AppleJPEG 0x000000018bb02348 [0x1550bb000] Created session
6.435154 AppleJPEG 0x000000018bb02348 [0x15487f600] Created session
6.480890 AppleJPEG 0x000000018bb02348 [0x1550c1000] Created session
6.952666 CFNetwork 0x0000000183f919a4 TCP Conn 0x1546a5230 SSL Handshake DONE
7.034320 CFNetwork 0x0000000183f918b4 TCP Conn 0x1546a5230 starting SSL negotiation
7.035121 CFNetwork 0x0000000184033760 TCP Conn 0x1546a5230 complete. fd: 6, err: 0
7.036622 CFNetwork 0x0000000184034c8c TCP Conn 0x1546a5230 event 1. err: 0
7.607332 CFNetwork 0x0000000184034d64 TCP Conn 0x1546a5230 started
7.726344 CFNetwork 0x0000000183f919a4 TCP Conn 0x154670e50 SSL Handshake DONE
7.868298 CFNetwork 0x0000000183f919a4 TCP Conn 0x1546408d0 SSL Handshake DONE
7.877690 CFNetwork 0x0000000183f918b4 TCP Conn 0x154670e50 starting SSL negotiation
7.878310 CFNetwork 0x0000000184033760 TCP Conn 0x154670e50 complete. fd: 7, err: 0
7.879900 CFNetwork 0x0000000184034c8c TCP Conn 0x154670e50 event 1. err: 0
7.979690 CFNetwork 0x0000000183f918b4 TCP Conn 0x1546408d0 starting SSL negotiation
7.981042 CFNetwork 0x0000000184033760 TCP Conn 0x1546408d0 complete. fd: 6, err: 0
7.982874 CFNetwork 0x0000000184034c8c TCP Conn 0x1546408d0 event 1. err: 0
8.939527 CFNetwork 0x0000000184034d64 TCP Conn 0x154670e50 started
9.065458 CFNetwork 0x0000000184034d64 TCP Conn 0x1546408d0 started

Thread 0 name:
Thread 0 Crashed:
0 anAppName 0x00000001000d6b24 specialized MeetUpsListDisplayTableViewController.tableView(UITableView, cellForRowAtIndexPath : NSIndexPath) -> UITableViewCell (MeetUpsListDisplayTableViewController.swift:141)
1 anAppName 0x00000001000d48f0 @objc MeetUpsListDisplayTableViewController.tableView(UITableView, cellForRowAtIndexPath : NSIndexPath) -> UITableViewCell (MeetUpsListDisplayTableViewController.swift:0)
2 UIKit 0x000000018a125660 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 688
3 UIKit 0x000000018a1257b8 -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 80
4 UIKit 0x000000018a1153b8 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2440
5 UIKit 0x000000018a12a348 -[UITableView _performWithCachedTraitCollection:] + 104
6 UIKit 0x0000000189ecba74 -[UITableView layoutSubviews] + 176
7 UIKit 0x0000000189ddeff0 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 644
8 QuartzCore 0x00000001895e5f14 -[CALayer layoutSublayers] + 148
9 QuartzCore 0x00000001895e0b20 CA::Layer::layout_if_needed(CA::Transaction*) + 292
10 QuartzCore 0x00000001895e09e0 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 32
11 QuartzCore 0x00000001895e007c CA::Context::commit_transaction(CA::Transaction*) + 252
12 QuartzCore 0x00000001895dfdd0 CA::Transaction::commit() + 516
13 QuartzCore 0x00000001895d94bc CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 80
14 CoreFoundation 0x0000000184843c30 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
15 CoreFoundation 0x00000001848419d4 __CFRunLoopDoObservers + 372
16 CoreFoundation 0x0000000184841e04 __CFRunLoopRun + 928
17 CoreFoundation 0x0000000184770dc0 CFRunLoopRunSpecific + 384
18 GraphicsServices 0x000000018f8c4088 GSEventRunModal + 180
19 UIKit 0x0000000189e4af44 UIApplicationMain + 204
20 anAppName 0x0000000100118ef4 main (AppDelegate.swift:19)
21 libdyld.dylib 0x0000000199bbe8b8 start + 4

Thread 1:
0 libsystem_kernel.dylib 0x0000000199cdbc0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000199da1538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000199da1028 start_wqthread + 4

Thread 2 name:
Thread 2:
0 libsystem_kernel.dylib 0x0000000199cdc59c kevent_qos + 8
1 libdispatch.dylib 0x0000000199ba0a04 _dispatch_mgr_invoke + 232
2 libdispatch.dylib 0x0000000199b8f93c _dispatch_source_invoke + 0

Thread 3:
0 libsystem_kernel.dylib 0x0000000199cdbc0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000199da1538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000199da1028 start_wqthread + 4

Thread 4:
0 libsystem_kernel.dylib 0x0000000199cdbc0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000199da1538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000199da1028 start_wqthread + 4

Thread 5:
0 libsystem_kernel.dylib 0x0000000199cdbc0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000199da1538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000199da1028 start_wqthread + 4

Thread 6 name:
Thread 6:
0 libsystem_kernel.dylib 0x0000000199cc0c30 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x0000000199cc0aac mach_msg + 72
2 CoreFoundation 0x0000000184844168 __CFRunLoopServiceMachPort + 196
3 CoreFoundation 0x0000000184841e6c __CFRunLoopRun + 1032
4 CoreFoundation 0x0000000184770dc0 CFRunLoopRunSpecific + 384
5 CFNetwork 0x000000018400e074 +[NSURLConnection(Loader) _resourceLoadLoop:] + 412
6 Foundation 0x00000001857cb138 __NSThread__start__ + 1000
7 libsystem_pthread.dylib 0x0000000199da3b3c _pthread_body + 156
8 libsystem_pthread.dylib 0x0000000199da3aa0 _pthread_body + 0
9 libsystem_pthread.dylib 0x0000000199da1030 thread_start + 4

Thread 7 name:
Thread 7:
0 libsystem_kernel.dylib 0x0000000199cdb408 __select + 8
1 CoreFoundation 0x000000018484a6d0 __CFSocketManager + 648
2 libsystem_pthread.dylib 0x0000000199da3b3c _pthread_body + 156
3 libsystem_pthread.dylib 0x0000000199da3aa0 _pthread_body + 0
4 libsystem_pthread.dylib 0x0000000199da1030 thread_start + 4

Thread 8:
0 libsystem_kernel.dylib 0x0000000199cdbc0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000199da1538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000199da1028 start_wqthread + 4

Thread 9:
0 libsystem_kernel.dylib 0x0000000199cdbc0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000199da1538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000199da1028 start_wqthread + 4

Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x0000000101315400 x1: 0x0000000199d9a8f4 x2: 0x0000000000000050 x3: 0x0000000199d08674
x4: 0x0000000000000000 x5: 0x0000000000000033 x6: 0x0000000000000000 x7: 0x0000000000000000
x8: 0x0000000101315408 x9: 0x0000000000000005 x10: 0x0000000000000000 x11: 0x0000000000000a00
x12: 0x0000000000000040 x13: 0x0000000000000009 x14: 0x0000000000904810 x15: 0x0000000155a00000
x16: 0x0000000199d08178 x17: 0x00000001001905e0 x18: 0x0000000000000000 x19: 0x00000001548acc00
x20: 0x0000000000000008 x21: 0x0000000000000010 x22: 0x0000000000000000 x23: 0x0000000000000020
x24: 0x0000000000000040 x25: 0x0000000000000200 x26: 0x0000000100458a40 x27: 0x0000000000000420
x28: 0x0000000000000000 fp: 0x000000016fd813f0 lr: 0x00000001000d5f1c
sp: 0x000000016fd81210 pc: 0x00000001000d6b24 cpsr: 0x80000000

Binary Images: ...


And the code

import UIKit
import CoreLocation

let locationsManager = CLLocationManager()

var usersLocation = CLLocation()

var flag : Bool!

class MeetUpsListDisplayTableViewController : UITableViewController,CLLocationManagerDelegate {

var meetUpsJSON = [NSDictionary]()
var userLocation : CLLocation?

func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
print("failed with error :\(error)")
locationsManager.stopUpdatingLocation()
}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

usersLocation = locations.last!

let usersCoordinates = CLGeocoder()
usersCoordinates.reverseGeocodeLocation(usersLocation) { ( placemark : [CLPlacemark]?, error : NSError?) -> Void in

if error == nil {

self.fetchEventsInUsersCountry((placemark?.last?.ISOcountryCode)!)
locationsManager.stopUpdatingLocation()
}else{
print(error)
}
}

locationsManager.stopUpdatingLocation()
}


func fetchEventsInUsersCountry( countryISO : String ){

let components = NSURLComponents()
components.scheme = "https"
components.host = "www.website.com"
components.path = "/TMVUKApp/findEvents.php"
components.query = "usersISOCountryCode=\(countryISO)"

let fetchEventsURL = components.URL!
print(fetchEventsURL)

let request = NSURLRequest(URL: fetchEventsURL)

let session = NSURLSession.sharedSession()

let task = session.dataTaskWithRequest(request) {

(data, response, error) -> Void in

if error == nil{

self.meetUpsJSON = try! NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableLeaves) as! [NSDictionary]

dispatch_async(dispatch_get_main_queue()) {


if self.meetUpsJSON.count > 0 {

self.tableView.reloadData()

}
}
}

}

task.resume()

}

override func viewDidLoad() {

super.viewDidLoad()


self.tableView.registerNib(UINib(nibName: "MeetUpDisplayTableViewCell", bundle: nil), forCellReuseIdentifier: "meetUp")
navigationController?.hidesBarsOnSwipe = true
tableView.tableFooterView = UIView(frame: CGRectZero)

//************************** GEtting User's latitude/ Longitude ********************

locationsManager.delegate = self
locationsManager.startUpdatingLocation()

//************************** GEtting User's latitude/ Longitude ********************






// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false

// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}

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

// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {


return 1
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

print("noris")

return self.meetUpsJSON.count
}



override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

print("cfraip")

let cell = self.tableView.dequeueReusableCellWithIdentifier("meetUp", forIndexPath: indexPath) as! MeetUpDisplayTableViewCell
//
// ///meetUpsJSON is array of dictionaries.

let JSONDict = meetUpsJSON[indexPath.row]


let dateFormatter = NSDateFormatter()

dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"

dateFormatter.timeZone = NSTimeZone.systemTimeZone()

if let eventDateString = JSONDict["EventDateTime"] as? String {
let eventDate = dateFormatter.dateFromString(eventDateString)
let calendar = NSCalendar.currentCalendar()

let components : NSDateComponents = calendar.components([NSCalendarUnit.Year,NSCalendarUnit.Month,NSCalendarUnit.Day,NSCalendarUnit.Hour,NSCalendarUnit.Minute,NSCalendarUnit.Weekday], fromDate: eventDate!)

cell.lblCalendarDateDisplay.text = "\(components.day)"

var dayOfWeek : String?
var monthOfYear : String?

switch (components.weekday){
case 1:
dayOfWeek = "Sun"

case 2:
dayOfWeek = "Mon"

case 3:
dayOfWeek = "Tue"

case 4:
dayOfWeek = "Wed"

case 5:
dayOfWeek = "Thu"

case 6:
dayOfWeek = "Fri"

case 7:
dayOfWeek = "Sat"


default:
print("hit deafult")
}

switch (components.month){
case 1:
monthOfYear = "Jan"

case 2:
monthOfYear = "Feb"

case 3:
monthOfYear = "Mar"

case 4:
monthOfYear = "Apr"

case 5:
monthOfYear = "May"

case 6:
monthOfYear = "Jun"

case 7:
monthOfYear = "Jul"

case 8:
monthOfYear = "Aug"

case 9:
monthOfYear = "Sep"

case 10:
monthOfYear = "Oct"

case 11:
monthOfYear = "Nov"

case 12:
monthOfYear = "Dec"

default:
print("hit default")
}


cell.lblCalendarDayDisplay.text = dayOfWeek!
cell.lblCalendarMonthYearDisplay.text = "\(monthOfYear!) '\(components.year % 100)"
}

if let eventName = JSONDict["EventName"] as? String{
cell.lblEventNameDisplay.text = eventName
}


cell.vwCalendarDisplay.layer.borderWidth = 1

cell.vwCalendarDisplay.layer.borderColor = UIColor.blackColor().CGColor

if let eventTown = JSONDict["EventTown"] as? String{

cell.lblEventStatusDisplay.text = eventTown //?? ""
}

let userLocation = CLLocation(latitude: usersLocation.coordinate.latitude, longitude: usersLocation.coordinate.longitude)
let eventLocation = CLLocation(latitude: (JSONDict["EventLattitudeCoordinate"] as! NSString).doubleValue, longitude: (JSONDict["EventLongitudeCoordinate"] as! NSString).doubleValue)
let usersDistanceToEventInMeters = userLocation.distanceFromLocation(eventLocation)
let usersDistanceToEventInMiles = usersDistanceToEventInMeters * 0.000621371192
/// let usersDistanceToEventInKiloMeters = usersDistanceToEventInMeters / 1000
cell.lblEventDistanceDisplay.text = Int(usersDistanceToEventInMiles).description



return cell



}


The line indicated by crash report is


let cell = self.tableView.dequeueReusableCellWithIdentifier("meetUp",
forIndexPath: indexPath) as! MeetUpDisplayTableViewCell


Can you see the reason from this crash log?
What does "specialised" mean?

Thanks so much for any help

If you have to vote this question down. Well done you. But please be brave enough to say why

UPDATE:
So I installed fabrics crashlytics and peppered my code my logs to find out where exactly i was crashing. From the logs it appears I am crashing as soon as I try to set a property of the cell. This though as mentioned is only an issue for one user. Any suggestions? Many thanks

Answer

SOLVED:

After using Fabrics Crashlytics and going line by line I discovered that the app was crashing here

      let dateFormatter = NSDateFormatter()

    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"

//changed this
    //dateFormatter.timeZone = NSTimeZone.systemTimeZone()
//to
        dateFormatter.locale = Locale(localeIdentifier: "en_GB")

    if let eventDateString = JSONDict["EventDateTime"] as? String {
    let eventDate = dateFormatter.dateFromString(eventDateString)
    let calendar = NSCalendar.currentCalendar()

    let components : NSDateComponents = calendar.components([NSCalendarUnit.Year,NSCalendarUnit.Month,NSCalendarUnit.Day,NSCalendarUnit.Hour,NSCalendarUnit.Minute,NSCalendarUnit.Weekday], fromDate: eventDate!)

long story short the crash occurs when users device is using the 12 hour format and not 24 hour.