From ef0f4b2b963af0cfb38b7f66b1fbdc889bee1f4e Mon Sep 17 00:00:00 2001
From: alyosha-tas <alexei.f.k@gmail.com>
Date: Sun, 5 Jul 2020 09:55:38 -0400
Subject: [PATCH] TAStudio: Don't erase states if they exist already when
 attaching an emulator instance (fixes #2057)

---
 src/BizHawk.Client.Common/movie/tasproj/TasStateManager.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/BizHawk.Client.Common/movie/tasproj/TasStateManager.cs b/src/BizHawk.Client.Common/movie/tasproj/TasStateManager.cs
index be8c67c975..591193afc9 100644
--- a/src/BizHawk.Client.Common/movie/tasproj/TasStateManager.cs
+++ b/src/BizHawk.Client.Common/movie/tasproj/TasStateManager.cs
@@ -67,7 +67,8 @@ namespace BizHawk.Client.Common
 				throw new InvalidOperationException("Savestate size can not be zero!");
 			}
 
-			_states = new SortedList<int, byte[]>(MaxStates);
+			// don't erase states if they exist already (already loaded)
+			if ((_states == null) || (_states.Capacity == 0)) { _states = new SortedList<int, byte[]>(MaxStates); }
 
 			UpdateStateFrequency();
 		}