Fix crash

Signal/src/Loki/LokiP2PServer.swift

@@ -8,6 +8,7 @@ private extension GCDWebServerResponse {
 }
 
 private extension GCDWebServerDataRequest {
+    
     var truncatedContentType: String? {
         guard let contentType = contentType else { return nil }
         guard let substring = contentType.split(separator: ";").first else { return contentType }
@@ -89,8 +90,9 @@ final class LokiP2PServer : NSObject {
     
     @objc public var serverURL: URL? { return webServer.serverURL }
     @objc public var isRunning: Bool { return webServer.isRunning }
-    
-    @objc @discardableResult func start(onPort port: UInt) -> Bool  {
+
+    @discardableResult
+    @objc func start(onPort port: UInt) -> Bool  {
         guard !webServer.isRunning else { return false }
         webServer.start(withPort: port, bonjourName: nil)
         return webServer.isRunning

SignalServiceKit/src/Loki/API/LokiAPI+SwarmAPI.swift

@@ -16,8 +16,8 @@ public extension LokiAPI {
     @objc public static func loadSwarmCache() {
         var result: [String:[Target]]? = nil
         storage.dbReadConnection.read { transaction in
-            let intermediate = transaction.object(forKey: swarmCacheKey, inCollection: swarmCacheCollection) as! [String:[TargetWrapper]]
-            result = intermediate.mapValues { $0.map { Target(from: $0) } }
+            let intermediate = transaction.object(forKey: swarmCacheKey, inCollection: swarmCacheCollection) as! [String:[TargetWrapper]]?
+            result = intermediate?.mapValues { $0.map { Target(from: $0) } }
         }
         swarmCache = result ?? [:]
     }