Add extension method to handle cases of fire-and-forget async usage

osu.Game/Extensions/TaskExtensions.cs

@@ -0,0 +1,26 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Threading.Tasks;
+using osu.Framework.Logging;
+
+namespace osu.Game.Extensions
+{
+    public static class TaskExtensions
+    {
+        /// <summary>
+        /// Denote a task which is to be run without local error handling logic, where failure is not catastrophic.
+        /// Avoids unobserved exceptions from being fired.
+        /// </summary>
+        /// <param name="task">The task.</param>
+        /// <param name="logOnError">Whether errors should be logged as important, or silently ignored.</param>
+        public static void FireAndForget(this Task task, bool logOnError = false)
+        {
+            task.ContinueWith(t =>
+            {
+                if (logOnError)
+                    Logger.Log($"Error running task: {t.Exception?.Message ?? "unknown"}", LoggingTarget.Runtime, LogLevel.Important);
+            }, TaskContinuationOptions.NotOnRanToCompletion);
+        }
+    }
+}