fix core data related crash

Author: tgymnich

TUM Campus App.xcodeproj/project.pbxproj

@@ -1179,11 +1179,11 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 49;
+				CURRENT_PROJECT_VERSION = 50;
 				DEVELOPMENT_TEAM = 2J3C6P6X3N;
 				INFOPLIST_FILE = "TUM Campus App/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 3.11;
+				MARKETING_VERSION = 3.12;
 				PRODUCT_BUNDLE_IDENTIFIER = de.tum.tca;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1203,11 +1203,11 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 49;
+				CURRENT_PROJECT_VERSION = 50;
 				DEVELOPMENT_TEAM = 2J3C6P6X3N;
 				INFOPLIST_FILE = "TUM Campus App/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 3.11;
+				MARKETING_VERSION = 3.12;
 				PRODUCT_BUNDLE_IDENTIFIER = de.tum.tca;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";

TUM Campus App.xcodeproj/xcshareddata/xcschemes/TUM Campus App.xcscheme

@@ -82,6 +82,10 @@
             argument = "-com.apple.CoreData.SQLDebug 1"
             isEnabled = "NO">
          </CommandLineArgument>
+         <CommandLineArgument
+            argument = "-com.apple.CoreData.ConcurrencyDebug 1"
+            isEnabled = "NO">
+         </CommandLineArgument>
          <CommandLineArgument
             argument = "-logout"
             isEnabled = "NO">

TUM Campus App/Entity/EntityImporter.swift

@@ -49,7 +49,7 @@ final class Importer<EntityType: Entity, EntityContainer: Decodable, DecoderType
     }()
 
     lazy var context: NSManagedObjectContext = {
-        let context = coreDataStack.newBackgroundContext()
+        let context = coreDataStack.viewContext
         context.mergePolicy = NSMergePolicy.mergeByPropertyObjectTrump
         return context
     }()

TUM Campus App/Entity/NewsImporter.swift

@@ -36,7 +36,7 @@ final class NewsImporter {
         return fetchedResultsController
     }()
     let context: NSManagedObjectContext = {
-        let context = coreDataStack.newBackgroundContext()
+        let context = coreDataStack.viewContext
         context.mergePolicy = NSMergePolicy.mergeByPropertyObjectTrump
         return context
     }()