@@ -28,6 +28,7 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
 -   Fixed Visual Studio 2017 compat ([#434][i434]) for setup.py
 -   Fixed crashes when integrating pythonnet in Unity3d ([#714][i714]),
     related to unloading the Application Domain
+-   Fixed interop methods with Py_ssize_t. NetCoreApp 2.0 is more sensitive than net40 and requires this fix. ([#531][p531])
 -   Fixed crash on exit of the Python interpreter if a python class
     derived from a .NET class has a `__namespace__` or `__assembly__`
     attribute ([#481][i481])
@@ -688,3 +689,4 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
 [p163]: https://github.com/pythonnet/pythonnet/pull/163
 [p625]: https://github.com/pythonnet/pythonnet/pull/625
 [i131]: https://github.com/pythonnet/pythonnet/issues/131
+[p531]: https://github.com/pythonnet/pythonnet/pull/531
@@ -69,10 +69,8 @@ public void TestRepeat()
             PyObject actual = t1.Repeat(3);
             Assert.AreEqual("FooFooFoo", actual.ToString());
 
-            // On 32 bit system this argument should be int, but on the 64 bit system this should be long value.
-            // This works on the Framework 4.0 accidentally, it should produce out of memory!
-            // actual = t1.Repeat(-3);
-            // Assert.AreEqual("", actual.ToString());
+            actual = t1.Repeat(-3);
+            Assert.AreEqual("", actual.ToString());
         }
 
         [Test]
 
@@ -276,7 +276,7 @@ public static void SetError(Exception e)
         /// </remarks>
         public static bool ErrorOccurred()
         {
-            return Runtime.PyErr_Occurred() != 0;
+            return Runtime.PyErr_Occurred() != IntPtr.Zero;
         }
 
         /// <summary>
Original file line number	Diff line number	Diff line change
@@ -276,7 +276,7 @@ public static void SetError(Exception e)
276	276	/// </remarks>
277	277	public static bool ErrorOccurred()
278	278	{
279		- return Runtime.PyErr_Occurred() != 0;
	279	+ return Runtime.PyErr_Occurred() != IntPtr.Zero;
280	280	}
281	281
282	282	/// <summary>