From 84be5d211cb318c18c041df29797bc0d624d8519 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@users.noreply.github.com>
Date: Sat, 24 Oct 2015 18:04:35 -0500
Subject: [PATCH] fix IndexOutOfRangeException in SNES Graphics Debugger #529

---
 BizHawk.Client.EmuHawk/tools/SNES/SNESGraphicsDebugger.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/BizHawk.Client.EmuHawk/tools/SNES/SNESGraphicsDebugger.cs b/BizHawk.Client.EmuHawk/tools/SNES/SNESGraphicsDebugger.cs
index 8c4a6e4ff6..dc76e411a8 100644
--- a/BizHawk.Client.EmuHawk/tools/SNES/SNESGraphicsDebugger.cs
+++ b/BizHawk.Client.EmuHawk/tools/SNES/SNESGraphicsDebugger.cs
@@ -1163,7 +1163,10 @@ namespace BizHawk.Client.EmuHawk
 						if (bg.TileSize == 16) { tx /= 2; ty /= 2; } //worry about this later. need to pass a different flag into `currViewingTile`
 
 						int tloc = ty * bg.ScreenSizeInTiles.Width + tx;
-						if (tloc > map.Length) break;
+						if (tx >= bg.ScreenSizeInTiles.Width) break;
+						if (ty >= bg.ScreenSizeInTiles.Height) break;
+						if (tx < 0) break;
+						if (ty < 0) break;
 
 						currMapEntryState = new MapEntryState();
 						currMapEntryState.bgnum = (int)CurrDisplaySelection;