From 3da182b0b86d93000d4473188f361ffa2de9fb73 Mon Sep 17 00:00:00 2001
From: Aapo Alasuutari <aapo.alasuutari@gmail.com>
Date: Sat, 9 Jul 2022 12:49:20 +0300
Subject: fix(ext/ffi): Avoid keeping JsRuntimeState RefCell borrowed for event
 loop middleware calls (#15116)

---
 ext/ffi/00_ffi.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'ext')

diff --git a/ext/ffi/00_ffi.js b/ext/ffi/00_ffi.js
index 2730cae72..22e442e51 100644
--- a/ext/ffi/00_ffi.js
+++ b/ext/ffi/00_ffi.js
@@ -232,7 +232,9 @@
     }
 
     unref() {
-      if (--this.#refcount === 0) {
+      // Only decrement refcount if it is positive, and only
+      // unref the callback if refcount reaches zero.
+      if (this.#refcount > 0 && --this.#refcount === 0) {
         core.opSync("op_ffi_unsafe_callback_ref", false);
       }
     }
-- 
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