Fix problem discovered by Greg McFarlane: when an imported module

replaces its own entry in sys.module, reference count errors ensue;
even if there is no reference count problem, it would be preferable
for the import to yield the new thing in sys.modules anyway (if only
because that's what later imports will yield).  This opens the road to
an official hack to implement a __getattr__ like feature for modules:
stick an instance in sys.modules[__name__].

1 files changed, 7 insertions, 0 deletions

diff --git a/Python/import.c b/Python/import.c
index e44dc8c264..2a4b5cc873 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -182,6 +182,13 @@ PyImport_ExecCodeModule(name, co)
 	if (v == NULL)
 		return NULL;
 	Py_DECREF(v);
+
+	if ((m = PyDict_GetItemString(_PyImport_Modules, name)) == NULL) {
+		PyErr_SetString(PyExc_SystemError,
+				"loaded module not found in sys.modules");
+		return NULL;
+	}
+
 	Py_INCREF(m);
 
 	return m;