From 74abf61a08f22295420bc22ba7f96def69844a90 Mon Sep 17 00:00:00 2001
From: Lior Halphon <LIJI32@gmail.com>
Date: Sat, 23 Jun 2018 11:50:08 +0300
Subject: [PATCH] Fixed a crash that happened when changing the rewind length
 in Cocoa

---
 Cocoa/Document.m | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Cocoa/Document.m b/Cocoa/Document.m
index 3da5c6f..7cb0eea 100644
--- a/Cocoa/Document.m
+++ b/Cocoa/Document.m
@@ -1411,9 +1411,11 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
 
 - (void) updateRewindLength
 {
-    if (GB_is_inited(&gb)) {
-        GB_set_rewind_length(&gb, [[NSUserDefaults standardUserDefaults] integerForKey:@"GBRewindLength"]);
-    }
+    [self performAtomicBlock:^{
+        if (GB_is_inited(&gb)) {
+            GB_set_rewind_length(&gb, [[NSUserDefaults standardUserDefaults] integerForKey:@"GBRewindLength"]);
+        }
+    }];
 }
 
 @end