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

2705492e · Victor Stinner · b67a4a34 · 2705492e
Commit 2705492e authored Jul 16, 2013 by Victor Stinner
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Showing with 4 additions and 2 deletions

Objects/listobject.c Objects/listobject.c +4 -2

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--- 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)
+    if (Py_SIZE(self) < self->allocated) {
-        list_resize(self, Py_SIZE(self));  /* shrinking can't fail */
+        if (list_resize(self, Py_SIZE(self)) < 0)
+            goto error;
+    }
    Py_DECREF(it);
    Py_RETURN_NONE;