Fix alerts parsing.

1Weather/Network/Notifications/NWSAlertInfoParser.swift

@@ -8,9 +8,14 @@
 import Foundation
 import Foundation
 
 
 class NWSAlertInfoParser {
 class NWSAlertInfoParser {
+    private var strongSelfReference: NWSAlertInfoParser?
     public func fetchExtendedInfo(for alert: NWSAlert, completion: @escaping (String?, NWSAlertExtendedInfo?) -> ()) {
     public func fetchExtendedInfo(for alert: NWSAlert, completion: @escaping (String?, NWSAlertExtendedInfo?) -> ()) {
+        self.strongSelfReference = self
         let log = Logger(componentName: "NWSAlertInfoParser (alert \(alert.messageID))")
         let log = Logger(componentName: "NWSAlertInfoParser (alert \(alert.messageID))")
         fetchContent(for: alert, logger: log) { [weak self] (weatherMessage) in
         fetchContent(for: alert, logger: log) { [weak self] (weatherMessage) in
+            defer {
+                self?.strongSelfReference = nil
+            }
             guard let weatherMessage = weatherMessage else {
             guard let weatherMessage = weatherMessage else {
                 completion(nil, nil)
                 completion(nil, nil)
                 return
                 return