From 266208c5000bb8df90b9bde0f59ad2ac2a3d2bfc Mon Sep 17 00:00:00 2001
From: Alexander Shabalin <alexander.shabalin@jetbrains.com>
Date: Thu, 18 Jan 2024 13:07:00 +0100
Subject: [PATCH] [K/N] Fix finalizer handling with mimalloc ^KT-63423

---
 .../runtime/src/alloc/legacy/cpp/ObjectFactorySweep.hpp         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kotlin-native/runtime/src/alloc/legacy/cpp/ObjectFactorySweep.hpp b/kotlin-native/runtime/src/alloc/legacy/cpp/ObjectFactorySweep.hpp
index 8733e71eadb..9cc9ddea43b 100644
--- a/kotlin-native/runtime/src/alloc/legacy/cpp/ObjectFactorySweep.hpp
+++ b/kotlin-native/runtime/src/alloc/legacy/cpp/ObjectFactorySweep.hpp
@@ -59,7 +59,7 @@ SegregatedFinalizerQueue<typename Traits::ObjectFactory::FinalizerQueue> Sweep(
         sweepHandle.addSweptObject();
         if (HasFinalizers(objHeader)) {
             auto* extraObject = mm::ExtraObjectData::Get(objHeader);
-            if (compiler::objcDisposeOnMain() && extraObject->getFlag(mm::ExtraObjectData::FLAGS_RELEASE_ON_MAIN_QUEUE)) {
+            if (compiler::objcDisposeOnMain() && extraObject && extraObject->getFlag(mm::ExtraObjectData::FLAGS_RELEASE_ON_MAIN_QUEUE)) {
                 objectFactoryIter.MoveAndAdvance(finalizerQueue.mainThread, it);
             } else {
                 objectFactoryIter.MoveAndAdvance(finalizerQueue.regular, it);