# HG changeset patch
# User Steve Dower <steve.dower@microsoft.com>
# Date 1442256956 25200
#      Mon Sep 14 11:55:56 2015 -0700
# Branch 3.5
# Node ID caf97de78757af0a5e7e6b56883f8a5a19df3505
# Parent  399b7d5616f19e1799ff1dcd0206b9f54e41cc81
Issue #25092: strftime does not clear errno before calling into CRT.

diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -14,6 +14,8 @@
 Library
 -------
 
+- Issue #25092: strftime does not clear errno before calling into CRT.
+
 - Issue #24684: socket.socket.getaddrinfo() now calls
   PyUnicode_AsEncodedString() instead of calling the encode() method of the
   host, to handle correctly custom string with an encode() method which doesn't
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -653,6 +653,9 @@
             PyErr_NoMemory();
             break;
         }
+#if defined _MSC_VER && _MSC_VER >= 1400 && defined(__STDC_SECURE_LIB__)
+        errno = 0;
+#endif
         _Py_BEGIN_SUPPRESS_IPH
         buflen = format_time(outbuf, i, fmt, &buf);
         _Py_END_SUPPRESS_IPH