From 6e8583dcb3c2da749349cc14621748c3920f07b2 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Tue, 8 Oct 1996 14:19:52 +0000
Subject: Check for NULL pointer returned from localtime()/gmtime().

---
 Modules/timemodule.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Modules/timemodule.c b/Modules/timemodule.c
index aee599a..6e6abfb 100644
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -135,7 +135,16 @@ time_convert(when, function)
 	time_t when;
 	struct tm * (*function) PROTO((const time_t *));
 {
-	struct tm *p = function(&when);
+	struct tm *p;
+	errno = 0;
+	p = function(&when);
+	if (p == NULL) {
+#ifdef EINVAL
+		if (errno == NULL)
+			errno = EINVAL;
+#endif
+		return err_errno(IOError);
+	}
 	return mkvalue("(iiiiiiiii)",
 		       p->tm_year + 1900,
 		       p->tm_mon + 1, /* Want January == 1 */
-- 
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