commit 32fd6eab1e9e3304b504943b425c7d9ba65bba66
author Victor Stinner <victor.stinner@gmail.com> Tue Jul 16 21:45:58 2013 +0200
committer Victor Stinner <victor.stinner@gmail.com> Tue Jul 16 21:45:58 2013 +0200
tree ea4e27aad769e06a6c71fec27e55f956f3f031cf
parent d1f9942ae399c765c1bee392658fc0f56f963ec5

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

Objects/listobject.c

diff --git a/Objects/listobject.c b/Objects/listobject.c
index b18ef57..0ec70e5 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -871,8 +871,10 @@
     }
 
     /* 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;