Getting crash reported in crashlytics about partial apply for closure - ios

Question

I am getting a crash reported in firebase related with - partial apply for closure. I tried answers on SO but they mainly says about use of [Weak self], I used it but still getting crash report of same. However not facing crash on my device.
Snapshot of crash report is this:
Related code of Network Manager is this:
//MARK: POST Methods for API Calls
func postRequest(urlString: String,
params:[String : Any],
view:UIView,
token:String,
success:#escaping (SuccessHandler),
failure:#escaping (ErrorHandler)) {
showProgressView(in: view)
let url = self.baseURL.appendingPathComponent(urlString)
var urlRequest = URLRequest(url: url)
urlRequest.httpMethod = "POST"
if token != "" {
urlRequest.addValue("\(token)", forHTTPHeaderField: "token")
}
urlRequest.networkServiceType = .default
urlRequest.cachePolicy = .reloadRevalidatingCacheData
urlRequest.timeoutInterval = 100
urlRequest.httpShouldHandleCookies = true
urlRequest.httpShouldUsePipelining = false
urlRequest.allowsCellularAccess = true
do {
urlRequest.httpBody = try JSONSerialization.data(withJSONObject: params, options: [])
}
catch let error as NSError {
print(error.localizedDescription)
}
let task = defaultSession.dataTask(with: urlRequest, completionHandler: { [weak self] (data, response, error) -> () in
self?.hideProgressView()
guard error == nil else {
failure(error!)
return
}
let statusCode = (response as? HTTPURLResponse)?.statusCode
if urlString.contains("signin") {
let token = (response as? HTTPURLResponse)?.value(forHTTPHeaderField: "token")
UserDefaults.standard.setValue(token, forKey: "authToken")
}
switch statusCode {
case 200:
if let aData = data {
do {
let responseJSON = try JSONSerialization.jsonObject(with: aData, options: [])
success(responseJSON) // Line no 160 mentioned in crash report
}
catch let error as NSError {
failure(error)
}
}
case 404:
if let aData = data {
do {
let responseJSON = try JSONSerialization.jsonObject(with: aData, options: [])
let dictObj = responseJSON as? [String: Any] ?? [String: Any]()
let message = dictObj["message"] ?? ""
let error = NSError(domain: "", code: 0, userInfo: [NSLocalizedDescriptionKey : message])
failure(error)
}
catch let error as NSError {
failure(error)
}
}
default:
self?.logger.error("New Http Response Code")
}
})
task.resume()
}
Login Class method from where this api call is invocated:
func loginAPICall() {
email = txtFieldUsername.text ?? ""
let password = txtFieldPassword.text ?? ""
let params = ["username" : email,"password":password]
NetworkManager.shared().postRequest(urlString: API.signIn, params: params, view: self.view, token: "") { (response) in
let arrObj = response as? [AnyObject] ?? [AnyObject]()
let dictObj = arrObj[0] as? [String: Any] ?? [String: Any]()
self.saveUserdata(dict: dictObj)
DispatchQueue.main.async {
let vc = self.storyboard?.instantiateViewController(identifier: ViewControllerIdentifier.ProfileLandingId) as! ProfileLandingVC
vc.modalPresentationStyle = .fullScreen
self.present(vc, animated: true, completion: nil)
}
} failure: { (error) in
print("error")
}
}
Earlier i was not using [weak self], recently added after following some answers. Can someone suggest a solution for it?