Probably fix.

dse · dse · commit fef0682bac1c · 2017-09-01T17:31:53.000+04:00
diff --git a/src/runtime/classbase.cs b/src/runtime/classbase.cs
@@ -278,7 +278,8 @@ public static void tp_dealloc(IntPtr ob)
             }
             Runtime.PyObject_GC_UnTrack(self.pyHandle);
             Runtime.PyObject_GC_Del(self.pyHandle);
-            Runtime.XDecref(self.tpHandle);
+            Console.Error.WriteLine("Hello from tp_dealloc");
+            //Runtime.XDecref(self.tpHandle);
             self.gcHandle.Free();
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -278,7 +278,8 @@ public static void tp_dealloc(IntPtr ob)`
`278`	`278`	`}`
`279`	`279`	`Runtime.PyObject_GC_UnTrack(self.pyHandle);`
`280`	`280`	`Runtime.PyObject_GC_Del(self.pyHandle);`
`281`		`- Runtime.XDecref(self.tpHandle);`
	`281`	`+ Console.Error.WriteLine("Hello from tp_dealloc");`
	`282`	`+ //Runtime.XDecref(self.tpHandle);`
`282`	`283`	`self.gcHandle.Free();`
`283`	`284`	`}`
`284`	`285`	`}`