https://github.com/bryanp/llhttp/commit/89551cd7fa539d7073e62ba8f6ba1dd70e73c36a

From 89551cd7fa539d7073e62ba8f6ba1dd70e73c36a Mon Sep 17 00:00:00 2001
From: Bryan Powell <bryan@metabahn.com>
Date: Wed, 29 Mar 2023 07:27:08 -0700
Subject: [PATCH] Fix ffi clean

--- a/Rakefile
+++ b/Rakefile
@@ -16,6 +16,8 @@ task :clean do
   [
     "./lib/llhttp/llhttp_ext.bundle"
   ].each do |file|
+    next unless File.exist?(file)
+
     FileUtils.rm(file)
   end
 end