From d2d9eaddbd7e9e12851f6c603a1c2069b17a6652 Mon Sep 17 00:00:00 2001
From: Andrew Au <andrewau@microsoft.com>
Date: Wed, 12 Apr 2023 14:27:38 -0700
Subject: [PATCH] Avoid clearing mark array when it was not committed

---
 src/coreclr/gc/gc.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
index b67815536cf829..474e041974cf9b 100644
--- a/src/coreclr/gc/gc.cpp
+++ b/src/coreclr/gc/gc.cpp
@@ -9633,7 +9633,10 @@ void gc_heap::remove_ro_segment (heap_segment* seg)
 #ifdef BACKGROUND_GC
     if (gc_can_use_concurrent)
     {
-        seg_clear_mark_array_bits_soh (seg);
+        if ((seg->flags & heap_segment_flags_ma_committed) || (seg->flags & heap_segment_flags_ma_pcommitted))
+        {
+            seg_clear_mark_array_bits_soh (seg);
+        }
     }
 #endif //BACKGROUND_GC