Try to fix nullreff

MediaBrowser.Api/Playback/MediaInfoService.cs

@@ -266,8 +266,7 @@ namespace MediaBrowser.Api.Playback
 
         private T Clone<T>(T obj)
         {
-            // Since we're going to be setting properties on MediaSourceInfos that come out of _mediaSourceManager, we should clone it
+
-            // Should we move this directly into MediaSourceManager?
             var json = JsonSerializer.SerializeToUtf8Bytes(obj);
             return JsonSerializer.Deserialize<T>(json);
         }
@@ -278,27 +277,20 @@ namespace MediaBrowser.Api.Playback
             var item = _libraryManager.GetItemById(id);
             var result = new PlaybackInfoResponse();
 
+            MediaSourceInfo[] mediaSources;
             if (string.IsNullOrWhiteSpace(liveStreamId))
             {
-                IEnumerable<MediaSourceInfo> mediaSources;
-                try
-                {
-                    // TODO handle supportedLiveMediaTypes ?
-                    mediaSources = await _mediaSourceManager.GetPlaybackMediaSources(item, user, true, false, CancellationToken.None).ConfigureAwait(false);
-                }
-                catch (Exception ex)
-                {
-                    mediaSources = new List<MediaSourceInfo>();
-                    Logger.LogError(ex, "Could not find media sources for item id {id}", id);
-                    // TODO PlaybackException ??
-                    //result.ErrorCode = ex.ErrorCode;
-                }
 
-                result.MediaSources = mediaSources.ToArray();
+                // TODO handle supportedLiveMediaTypes ?
+                var mediaSourcesList = await _mediaSourceManager.GetPlaybackMediaSources(item, user, true, false, CancellationToken.None).ConfigureAwait(false);
 
-                if (!string.IsNullOrWhiteSpace(mediaSourceId))
+                if (string.IsNullOrWhiteSpace(mediaSourceId))
                 {
-                    result.MediaSources = result.MediaSources
+                    mediaSources = mediaSourcesList.ToArray();
+                }
+                else
+                {
+                    mediaSources = mediaSourcesList
                         .Where(i => string.Equals(i.Id, mediaSourceId, StringComparison.OrdinalIgnoreCase))
                         .ToArray();
                 }
@@ -307,11 +299,13 @@ namespace MediaBrowser.Api.Playback
             {
                 var mediaSource = await _mediaSourceManager.GetLiveStream(liveStreamId, CancellationToken.None).ConfigureAwait(false);
 
-                result.MediaSources = new MediaSourceInfo[] { mediaSource };
+                mediaSources = new MediaSourceInfo[] { mediaSource };
             }
 
-            if (result.MediaSources.Count == 0)
+            if (mediaSources.Length == 0)
             {
+                result.MediaSources = Array.Empty<MediaSourceInfo>();
+
                 if (!result.ErrorCode.HasValue)
                 {
                     result.ErrorCode = PlaybackErrorCode.NoCompatibleStream;
@@ -319,7 +313,9 @@ namespace MediaBrowser.Api.Playback
             }
             else
             {
-                result.MediaSources = Clone(result.MediaSources);
+                // Since we're going to be setting properties on MediaSourceInfos that come out of _mediaSourceManager, we should clone it
+                // Should we move this directly into MediaSourceManager?
+                result.MediaSources = JsonSerializer.Deserialize<MediaSourceInfo[]>(JsonSerializer.SerializeToUtf8Bytes(mediaSources));
 
                 result.PlaySessionId = Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
             }