From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 16 Jul 2013 19:45:58 +0000 (+0200)
Subject: Issue #18408: Fix list.extend(), handle list_resize() failure
X-Git-Tag: v3.4.0a1~186
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=32fd6eab1e9e3304b504943b425c7d9ba65bba66;p=python

Issue #18408: Fix list.extend(), handle list_resize() failure
---

diff --git a/Objects/listobject.c b/Objects/listobject.c
index b18ef5763a..0ec70e587a 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -871,8 +871,10 @@ listextend(PyListObject *self, PyObject *b)
     }
 
     /* Cut back result list if initial guess was too large. */
-    if (Py_SIZE(self) < self->allocated)
-        list_resize(self, Py_SIZE(self));  /* shrinking can't fail */
+    if (Py_SIZE(self) < self->allocated) {
+        if (list_resize(self, Py_SIZE(self)) < 0)
+            goto error;
+    }
 
     Py_DECREF(it);
     Py_RETURN_NONE;