From 70e11acdbd3a206003dd47bbccc111ce1d55b88c Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Fri, 8 Nov 2013 00:50:58 +0100
Subject: [PATCH] Issue #19437: Fix datetime_subtract(), handle new_delta()
 failure

---
 Modules/_datetimemodule.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Modules/_datetimemodule.c b/Modules/_datetimemodule.c
index a89e0ecae58..1eace71f6ab 100644
--- a/Modules/_datetimemodule.c
+++ b/Modules/_datetimemodule.c
@@ -4462,6 +4462,9 @@ datetime_subtract(PyObject *left, PyObject *right)
             delta_us = DATE_GET_MICROSECOND(left) -
                        DATE_GET_MICROSECOND(right);
             result = new_delta(delta_d, delta_s, delta_us, 1);
+            if (result == NULL)
+                return NULL;
+
             if (offdiff != NULL) {
                 PyObject *temp = result;
                 result = delta_subtract(result, offdiff);