From c7d277ca747ba78fac6ecbb20a125b583450dce3 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Tue, 29 Aug 2023 11:42:47 +0200
Subject: [PATCH] Fix crash when unboxing managed structure with refs into
 `Variant`

---
 Source/Engine/Engine/NativeInterop.Unmanaged.cs | 1 -
 Source/Engine/Engine/NativeInterop.cs           | 3 ++-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Source/Engine/Engine/NativeInterop.Unmanaged.cs b/Source/Engine/Engine/NativeInterop.Unmanaged.cs
index 8837d460b..879f804d2 100644
--- a/Source/Engine/Engine/NativeInterop.Unmanaged.cs
+++ b/Source/Engine/Engine/NativeInterop.Unmanaged.cs
@@ -649,7 +649,6 @@ namespace FlaxEngine.Interop
             Type type = value.GetType();
             if (!type.IsValueType)
                 return ManagedHandle.ToIntPtr(handle);
-
             return ValueTypeUnboxer.GetPointer(value, type);
         }
 
diff --git a/Source/Engine/Engine/NativeInterop.cs b/Source/Engine/Engine/NativeInterop.cs
index e75877878..dd6087b98 100644
--- a/Source/Engine/Engine/NativeInterop.cs
+++ b/Source/Engine/Engine/NativeInterop.cs
@@ -1077,13 +1077,14 @@ namespace FlaxEngine.Interop
                     alloc.ptr = new IntPtr(NativeAlloc(size));
                     alloc.size = size;
                 }
-                
                 Unsafe.Write<T>(alloc.ptr.ToPointer(), value);
                 return alloc.ptr;
             }
 
             private static IntPtr UnboxPointer<T>(object value, object converter) where T : struct
             {
+                if (RuntimeHelpers.IsReferenceOrContainsReferences<T>()) // Cannot pin structure with references
+                    return IntPtr.Zero;
                 PinValue(value);
                 return new IntPtr(Unsafe.AsPointer(ref Unsafe.Unbox<T>(value)));
             }