pythonnet
diff --git a/‎src/runtime/Runtime.cs‎
Lines changed: 2 additions & 0 deletions b/‎src/runtime/Runtime.cs‎
Lines changed: 2 additions & 0 deletions
diff --git a/‎src/runtime/Types/ClrObject.cs‎
Lines changed: 8 additions & 0 deletions b/‎src/runtime/Types/ClrObject.cs‎
Lines changed: 8 additions & 0 deletions
@@ -158,6 +158,7 @@ internal static void Initialize(bool initSigs = false)
             ClassManager.Reset();
             ClassDerivedObject.Reset();
             TypeManager.Initialize();
+            CLRObject.creationBlocked = false;
             _typesInitialized = true;
 
             // Initialize modules that depend on the runtime class.
@@ -356,6 +357,7 @@ static bool TryCollectingGarbage(int runs, bool forceBreakLoops,
                 {
                     NullGCHandles(CLRObject.reflectedObjects);
                     CLRObject.reflectedObjects.Clear();
+                    CLRObject.creationBlocked = true;
                 }
             }
             return false;
 
@@ -11,10 +11,15 @@ internal sealed class CLRObject : ManagedType
     {
         internal readonly object inst;
 
+        internal static bool creationBlocked = false;
+
         // "borrowed" references
         internal static readonly HashSet<IntPtr> reflectedObjects = new();
         static NewReference Create(object ob, BorrowedReference tp)
         {
+            if (creationBlocked)
+                throw new InvalidOperationException("Reflected objects should not be created anymore.");
+
             Debug.Assert(tp != null);
             var py = Runtime.PyType_GenericAlloc(tp, 0);
 
@@ -61,6 +66,9 @@ internal static void Restore(object ob, BorrowedReference pyHandle, Dictionary<s
 
         protected override void OnLoad(BorrowedReference ob, Dictionary<string, object?>? context)
         {
+            if (creationBlocked)
+                throw new InvalidOperationException("Reflected objects should not be loaded anymore.");
+
             base.OnLoad(ob, context);
             GCHandle gc = GCHandle.Alloc(this);
             SetGCHandle(ob, gc);
Original file line number	Diff line number	Diff line change
@@ -158,6 +158,7 @@ internal static void Initialize(bool initSigs = false)
158	158	ClassManager.Reset();
159	159	ClassDerivedObject.Reset();
160	160	TypeManager.Initialize();
	161	+ CLRObject.creationBlocked = false;
161	162	_typesInitialized = true;
162	163
163	164	// Initialize modules that depend on the runtime class.
@@ -356,6 +357,7 @@ static bool TryCollectingGarbage(int runs, bool forceBreakLoops,
356	357	{
357	358	NullGCHandles(CLRObject.reflectedObjects);
358	359	CLRObject.reflectedObjects.Clear();
	360	+ CLRObject.creationBlocked = true;
359	361	}
360	362	}
361	363	return false;