Added clear cache methods to clear the internal type lookup cache for ref leak test runs.
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 4939f54..f5465c5 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -377,6 +377,9 @@
Py_XDECREF(warnings_module);
warnings_module = NULL;
+ /* Clear type lookup cache */
+ PyType_ClearCache();
+
/* Collect garbage. This may call finalizers; it's nice to call these
* before all modules are destroyed.
* XXX If a __del__ or weakref callback is triggered here, and tries to