@@ -1,12 +1,10 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Globalization;
-using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Security;
-using System.ComponentModel;
-using System.Linq.Expressions;
 
 namespace Python.Runtime
 {
@@ -666,6 +664,10 @@ private static bool ToPrimitive(IntPtr value, Type obType, out object result, bo
                         else
                         {
                             ulong num = Runtime.PyLong_AsUnsignedLong64(op);
+                            if (num == ulong.MaxValue && Exceptions.ErrorOccurred())
+                            {
+                                goto convert_error;
+                            }
                             try
                             {
                                 result = Convert.ToUInt32(num);
@@ -692,7 +694,7 @@ private static bool ToPrimitive(IntPtr value, Type obType, out object result, bo
                                 goto convert_error;
                             }
                         }
-                        ulong num = Runtime.PyLong_AsUnsignedLongLong(value);
+                        ulong num = Runtime.PyLong_AsUnsignedLongLong(op);
                         if (num == ulong.MaxValue && Exceptions.ErrorOccurred())
                         {
                             goto overflow;
Original file line number	Diff line number	Diff line change
@@ -1,12 +1,10 @@
1	1	using System;
2	2	using System.Collections;
3	3	using System.Collections.Generic;
	4	+ using System.ComponentModel;
4	5	using System.Globalization;
5		- using System.Reflection;
6	6	using System.Runtime.InteropServices;
7	7	using System.Security;
8		- using System.ComponentModel;
9		- using System.Linq.Expressions;
10	8
11	9	namespace Python.Runtime
12	10	{
@@ -666,6 +664,10 @@ private static bool ToPrimitive(IntPtr value, Type obType, out object result, bo
666	664	else
667	665	{
668	666	ulong num = Runtime.PyLong_AsUnsignedLong64(op);
	667	+ if (num == ulong.MaxValue && Exceptions.ErrorOccurred())
	668	+ {
	669	+ goto convert_error;
	670	+ }
669	671	try
670	672	{
671	673	result = Convert.ToUInt32(num);
@@ -692,7 +694,7 @@ private static bool ToPrimitive(IntPtr value, Type obType, out object result, bo
692	694	goto convert_error;
693	695	}
694	696	}
695		- ulong num = Runtime.PyLong_AsUnsignedLongLong(value);
	697	+ ulong num = Runtime.PyLong_AsUnsignedLongLong(op);
696	698	if (num == ulong.MaxValue && Exceptions.ErrorOccurred())
697	699	{
698	700	goto overflow;