Fixed: Null reference exception in CompletedDownloadService

Fixes Sentry LIDARR-1GW

src/NzbDrone.Core.Test/Download/CompletedDownloadServiceFixture.cs

@@ -176,6 +176,16 @@ namespace NzbDrone.Core.Test.Download
             AssertNoAttemptedImport();
         }
 
+        [Test]
+        public void should_not_throw_if_remotealbum_is_null()
+        {
+            _trackedDownload.RemoteAlbum = null;
+
+            Subject.Process(_trackedDownload);
+
+            AssertNoAttemptedImport();
+        }
+
         [Test]
         public void should_mark_as_imported_if_all_tracks_were_imported()
         {

src/NzbDrone.Core/Download/CompletedDownloadService.cs

@@ -80,7 +80,7 @@ namespace NzbDrone.Core.Download
                     return;
                 }
 
-                var artist = trackedDownload.RemoteAlbum.Artist;
+                var artist = trackedDownload.RemoteAlbum?.Artist;
 
                 if (artist == null)
                 {