Simulator crashes when launching in xcode and the issue is in view.controller.init

Question

I've been teaching myself Swift and only a few days in. I've honestly done very little to the code and not sure what is going on. I cannot find a similar thread on stackoverflow with the same issue.

This is all I have written so far in the ViewController.swift:

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var calcNum: UILabel!

    var middleOfTyping = false

    @IBAction func numButton(sender: UIButton) {
        let digit = sender.currentTitle!

        if middleOfTyping {
            calcNum.text = calcNum.text! + digit
        } else {
            calcNum.text = digit
        }
    }


}

When I try launching the simulator, the simulator crashes and gives me this code within Thread 1 - 0 ViewController.init :

    Calculator Take 2`Calculator_Take_2.ViewController.init (Calculator_Take_2.ViewController.Type)(coder : __ObjC.NSCoder) -> Swift.Optional:
    0x10b542b00 <+0>:   pushq  %rbp
    0x10b542b01 <+1>:   movq   %rsp, %rbp
    0x10b542b04 <+4>:   subq   $0x70, %rsp
    0x10b542b08 <+8>:   movq   %rdi, -0x10(%rbp)
    0x10b542b0c <+12>:  movq   %rsi, -0x8(%rbp)
->  0x10b542b10 <+16>:  movq   $0x0, -0x18(%rbp)
    0x10b542b18 <+24>:  movq   -0x18(%rbp), %rax
    0x10b542b1c <+28>:  movq   0x363d(%rip), %rcx        ; direct field offset for Calculator_Take_2.ViewController.calcNum
    0x10b542b23 <+35>:  movq   %rsi, %rdx
    0x10b542b26 <+38>:  addq   %rcx, %rdx
    0x10b542b29 <+41>:  movq   %rdi, -0x30(%rbp)
    0x10b542b2d <+45>:  movq   %rdx, %rdi
    0x10b542b30 <+48>:  movq   %rsi, -0x38(%rbp)
    0x10b542b34 <+52>:  movq   %rax, %rsi
    0x10b542b37 <+55>:  movq   %rax, -0x40(%rbp)
    0x10b542b3b <+59>:  callq  0x10b5436f8               ; symbol stub for: swift_unknownWeakInit
    0x10b542b40 <+64>:  movq   -0x40(%rbp), %rdi
    0x10b542b44 <+68>:  callq  0x10b5436e0               ; symbol stub for: swift_unknownRelease
    0x10b542b49 <+73>:  movq   0x3618(%rip), %rax        ; direct field offset for Calculator_Take_2.ViewController.middleOfTyping
    0x10b542b50 <+80>:  movq   -0x38(%rbp), %rcx
    0x10b542b54 <+84>:  movb   $0x0, (%rcx,%rax)
    0x10b542b58 <+88>:  movq   $0x0, -0x8(%rbp)
    0x10b542b60 <+96>:  movq   %rcx, -0x48(%rbp)
    0x10b542b64 <+100>: callq  0x10b542620               ; type metadata accessor for Calculator_Take_2.ViewController
    0x10b542b69 <+105>: leaq   -0x28(%rbp), %rdi
    0x10b542b6d <+109>: movq   -0x48(%rbp), %rcx
    0x10b542b71 <+113>: movq   %rcx, -0x28(%rbp)
    0x10b542b75 <+117>: movq   %rax, -0x20(%rbp)
    0x10b542b79 <+121>: movq   0x3448(%rip), %rsi        ; "initWithCoder:"
    0x10b542b80 <+128>: movq   -0x30(%rbp), %rax
    0x10b542b84 <+132>: movq   %rax, %rdx
    0x10b542b87 <+135>: callq  0x10b543692               ; symbol stub for: objc_msgSendSuper2
    0x10b542b8c <+140>: cmpq   $0x0, %rax
    0x10b542b92 <+146>: sete   %r8b
    0x10b542b96 <+150>: xorb   $0x1, %r8b
    0x10b542b9a <+154>: testb  $0x1, %r8b
    0x10b542b9e <+158>: movq   %rax, -0x50(%rbp)
    0x10b542ba2 <+162>: jne    0x10b542ba6               ; <+166> at ViewController.swift
    0x10b542ba4 <+164>: jmp    0x10b542bda               ; <+218> at ViewController.swift
    0x10b542ba6 <+166>: movq   -0x50(%rbp), %rax
    0x10b542baa <+170>: movq   %rax, -0x8(%rbp)
    0x10b542bae <+174>: movq   %rax, %rdi
    0x10b542bb1 <+177>: movq   %rax, -0x58(%rbp)
    0x10b542bb5 <+181>: callq  0x10b54369e               ; symbol stub for: objc_retain
    0x10b542bba <+186>: movq   -0x30(%rbp), %rdi
    0x10b542bbe <+190>: movq   %rax, -0x60(%rbp)
    0x10b542bc2 <+194>: callq  0x10b543698               ; symbol stub for: objc_release
    0x10b542bc7 <+199>: movq   -0x58(%rbp), %rdi
    0x10b542bcb <+203>: callq  0x10b543698               ; symbol stub for: objc_release
    0x10b542bd0 <+208>: movq   -0x58(%rbp), %rax
    0x10b542bd4 <+212>: movq   %rax, -0x68(%rbp)
    0x10b542bd8 <+216>: jmp    0x10b542bf4               ; <+244> at ViewController.swift
    0x10b542bda <+218>: movq   -0x30(%rbp), %rdi
    0x10b542bde <+222>: callq  0x10b543698               ; symbol stub for: objc_release
    0x10b542be3 <+227>: xorl   %eax, %eax
    0x10b542be5 <+229>: movl   %eax, %edi
    0x10b542be7 <+231>: callq  0x10b543698               ; symbol stub for: objc_release
    0x10b542bec <+236>: xorl   %eax, %eax
    0x10b542bee <+238>: movl   %eax, %edi
    0x10b542bf0 <+240>: movq   %rdi, -0x68(%rbp)
    0x10b542bf4 <+244>: movq   -0x68(%rbp), %rax
    0x10b542bf8 <+248>: addq   $0x70, %rsp
    0x10b542bfc <+252>: popq   %rbp
    0x10b542bfd <+253>: retq

xcode claims that the breakpoint is at "0x10b542b10 <+16>: movq $0x0, -0x18(%rbp)". I am not sure what any of this means nor how to fix it.

I tried to "undo" all the code I changed in my Main.storyboard, but even when I do that, the code that once worked does not work anymore either and produces the same error, so I am wondering if it is an issue with xCode itself (restarting does not help either).

Any help would be greatly appreciated! Thank you so much!

Simulator crashes when launching in xcode and the issue is in view.controller.init

Answers (1)

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