From b3403c78da4071051cfad7c64ed77b5d11fa637d Mon Sep 17 00:00:00 2001
From: smoogipoo <smoogipoo@smgi.me>
Date: Fri, 25 Jan 2019 20:47:37 +0900
Subject: [PATCH] Fix a few potential crashes

---
 osu.Game/Screens/Multi/Match/MatchSubScreen.cs       | 6 +++++-
 osu.Game/Screens/Play/ScreenWithBeatmapBackground.cs | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/osu.Game/Screens/Multi/Match/MatchSubScreen.cs b/osu.Game/Screens/Multi/Match/MatchSubScreen.cs
index 19b33f70d3..accddc3ba6 100644
--- a/osu.Game/Screens/Multi/Match/MatchSubScreen.cs
+++ b/osu.Game/Screens/Multi/Match/MatchSubScreen.cs
@@ -120,7 +120,11 @@ namespace osu.Game.Screens.Multi.Match
                 }
             };
 
-            chat.Exit += this.Exit;
+            chat.Exit += () =>
+            {
+                if (this.IsCurrentScreen())
+                    this.Exit();
+            };
         }
 
         [BackgroundDependencyLoader]
diff --git a/osu.Game/Screens/Play/ScreenWithBeatmapBackground.cs b/osu.Game/Screens/Play/ScreenWithBeatmapBackground.cs
index ac5aec2196..d3c7bd849f 100644
--- a/osu.Game/Screens/Play/ScreenWithBeatmapBackground.cs
+++ b/osu.Game/Screens/Play/ScreenWithBeatmapBackground.cs
@@ -16,7 +16,7 @@ namespace osu.Game.Screens.Play
     {
         protected override BackgroundScreen CreateBackground() => new BackgroundScreenBeatmap(Beatmap.Value);
 
-        protected new BackgroundScreenBeatmap Background => (BackgroundScreenBeatmap)base.Background;
+        protected new BackgroundScreenBeatmap Background => base.Background as BackgroundScreenBeatmap;
 
         public override bool AllowBeatmapRulesetChange => false;