From 8cd67529a3d08f0e66e8e4b45a8f773dc7456c7c Mon Sep 17 00:00:00 2001
From: nattthebear <goyuken@gmail.com>
Date: Tue, 20 Jul 2021 16:53:40 -0400
Subject: [PATCH] delta rewinder:  fix crash on rewinding when the buffer was
 full

Woops!
Closes #2870.
---
 src/BizHawk.Client.Common/rewind/ZeldaWinder.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/BizHawk.Client.Common/rewind/ZeldaWinder.cs b/src/BizHawk.Client.Common/rewind/ZeldaWinder.cs
index 56f194fdd7..a0b2a9306e 100644
--- a/src/BizHawk.Client.Common/rewind/ZeldaWinder.cs
+++ b/src/BizHawk.Client.Common/rewind/ZeldaWinder.cs
@@ -189,7 +189,12 @@ namespace BizHawk.Client.Common
 						_masterLength = (int)sss.Position;
 						_masterFrame = frame;
 						_count++;
-					}, force: true);
+					},
+					indexInvalidated: index =>
+					{
+						_count--;
+					},
+					force: true);
 				});
 			}
 		}