From f33b17585058381491e6fda08f491b8e48c7980c Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 20 Oct 2016 13:22:20 -0400
Subject: fix gratuitous undefined behavior in strptime

accessing an object of type const char *restrict as if it had type
char * is not defined.
---
 src/time/strptime.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'src/time')

diff --git a/src/time/strptime.c b/src/time/strptime.c
index f41f55f2..55c7ed1b 100644
--- a/src/time/strptime.c
+++ b/src/time/strptime.c
@@ -22,8 +22,13 @@ char *strptime(const char *restrict s, const char *restrict f, struct tm *restri
 		}
 		f++;
 		if (*f == '+') f++;
-		if (isdigit(*f)) w=strtoul(f, (void *)&f, 10);
-		else w=-1;
+		if (isdigit(*f)) {
+			char *new_f;
+			w=strtoul(f, &new_f, 10);
+			f = new_f;
+		} else {
+			w=-1;
+		}
 		adj=0;
 		switch (*f++) {
 		case 'a': case 'A':
-- 
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