Merge pull request #24548 from peppy/fix-score-copy-instability

Fix score being cloned in async method causing random crashes

Author: bdach

osu.Game/Screens/Play/Player.cs

@@ -810,10 +810,13 @@ private Task<ScoreInfo> prepareAndImportScoreAsync(bool forceImport = false)
             if (!canShowResults && !forceImport)
                 return Task.FromResult<ScoreInfo>(null);
 
+            // Clone score before beginning any async processing.
+            // - Must be run synchronously as the score may potentially be mutated in the background.
+            // - Must be cloned for the same reason.
+            Score scoreCopy = Score.DeepClone();
+
             return prepareScoreForDisplayTask = Task.Run(async () =>
             {
-                var scoreCopy = Score.DeepClone();
-
                 try
                 {
                     await PrepareScoreForResultsAsync(scoreCopy).ConfigureAwait(false);