Swift Crash: function signature specialization

Question

On my crash report I get the following output at the top.

0x00000001001a6c80 function signature specialization <Arg[0] = Owned To Guaranteed> of 
Test.MMCheckUserDetailsController.submitOrderButtonTapped 
(Test.MMCheckUserDetailsController)() -> () (MMCheckUserDetailsController.swift:167)

Here is the code for this output:

  func submitOrderButtonTapped() {

  (L167) let roomNumberText = count(roomNumberTextField.text) > 0 ? roomNumberTextField.text : "0"
  (L168) var myRoomNumber: Int32 = Int32(roomNumberText.toInt()!)

    ...
  }

I do not see how this line can crash my app.

What does this error actually means?

May be I myself was not able to reproduce the crash. – confile Sep 15 '15 at 10:48 — confile, Sep 15 '15 at 10:48

Kirit Modi · Accepted Answer · 2015-09-15T10:24:11.987

3

You are use coalescing operator at Line Number 167 as below. and Try now.

let roomNumberText = roomNumberTextField.text ?? "0"

edited Sep 15 '15 at 10:24

answered Sep 15 '15 at 10:03

Kirit Modi

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But you see my code. There is no array. How could I prevent this error? – confile Sep 15 '15 at 10:05
yes, In my code 76 line have no array, it have facebook function. but last i solve with array. – Kirit Modi Sep 15 '15 at 10:07
using this got symbolicating : http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports – Kirit Modi Sep 15 '15 at 10:11
I still do not get what you mean? – confile Sep 15 '15 at 10:12
A class where crash apps, in which array value may be changed – Kirit Modi Sep 15 '15 at 10:14
according to L167, click on Button after app Crash, Am i Right. – Kirit Modi Sep 15 '15 at 10:15
But I have still no idea where to search? – confile Sep 15 '15 at 10:18
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/89664/discussion-between-kirit-modi-and-confile). – Kirit Modi Sep 15 '15 at 10:25
@KiritModi not Working:) – kirti Chavda Sep 16 '15 at 10:11
@kirtimali your other issue, may be array issue. – Kirit Modi Sep 16 '15 at 11:02

Swift Crash: function signature specialization

1 Answers1