“Thread 1:EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)”? - ios

Question

This is my swift code
i will get above error on this line : guard (newUser["status"] as! Int != 0)
#IBAction func signInButton(_ sender: UIButton) {
if validator(){
DispatchQueue.global(priority: DispatchQueue.GlobalQueuePriority.default).async(execute: {
let datas:[String:String] = ["email":self.emailField.text!,"name": self.nameField.text!,"password" : self.passwordField.text!]
DispatchQueue.main.async {
SwiftSpinner.show("Signin' in...")
}
let newUser:NSDictionary = self.marketcloud!.createUser(datas)
print(newUser)
DispatchQueue.main.async {
SwiftSpinner.hide()
guard (newUser["status"] as! Int != 0) else {
let alertController = UIAlertController(title: "Error", message: "Email already in use. Try with a different one!", preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "Close",
style: UIAlertActionStyle.destructive,
handler: nil))
self.present(alertController, animated: true, completion: nil)
return
}
let alertController = UIAlertController(title: "Ok!", message: "User created successfully!", preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.default, handler: {(action:UIAlertAction) in
UserData.setLastRegisteredUser(self.emailField.text!, password: self.passwordField.text!);
print("Setted UserData \n \(UserData.getLastRegistedUserEmail(),UserData.getLastRegisteredUserPassword())")
//returns to the login view
let next = self.storyboard!.instantiateViewController(withIdentifier: "viewController") as! ViewController
next.downloadProducts = false
next.load = true
self.navigationController?.pushViewController(next, animated: true)
}));
self.present(alertController, animated: true, completion: nil)
}
})
}
}

Answer 1

Try to understand how guard works.
The condition must be an optional binding with let or a boolean expression
guard let status = newUser["status"] as? Int, status != 0 else { ...
And no parentheses in Swift.