From 22af2599a9f5724664aefb7146427cb4de4d65d3 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Wed, 13 Nov 2013 12:11:36 +0100
Subject: Issue #19437: Fix PyImport_ImportModuleLevelObject(), handle
 PyUnicode_Substring() failure (ex: MemoryError)

---
 Python/import.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Python/import.c b/Python/import.c
index c96106f..ad181a2 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -1364,7 +1364,11 @@ PyImport_ImportModuleLevelObject(PyObject *name, PyObject *given_globals,
                 goto error;
             }
         }
+
         base = PyUnicode_Substring(package, 0, last_dot);
+        if (base == NULL)
+            goto error;
+
         if (PyUnicode_GET_LENGTH(name) > 0) {
             PyObject *borrowed_dot, *seq = NULL;
 
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