From f440626c3ea89569cf4ec4b37e20dbf095cb8211 Mon Sep 17 00:00:00 2001
From: Tomek Zawadzki <tomekzawadzki98@gmail.com>
Date: Fri, 5 Jul 2024 12:15:39 +0200
Subject: [PATCH] Fix crash on Fabric iOS caused by concurrent runtime access

---
 ios/RCTMarkdownUtils.mm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ios/RCTMarkdownUtils.mm b/ios/RCTMarkdownUtils.mm
index 2338a222..913b718b 100644
--- a/ios/RCTMarkdownUtils.mm
+++ b/ios/RCTMarkdownUtils.mm
@@ -28,6 +28,9 @@ - (NSAttributedString *)parseMarkdown:(nullable NSAttributedString *)input withA
         }
 
         static std::shared_ptr<jsi::Runtime> runtime;
+        static std::mutex runtimeMutex;
+        auto lock = std::lock_guard<std::mutex>(runtimeMutex);
+
         if (runtime == nullptr) {
             NSString *path = [[NSBundle mainBundle] pathForResource:@"react-native-live-markdown-parser" ofType:@"js"];
             assert(path != nil && "[react-native-live-markdown] Markdown parser bundle not found");