From 0ad485a8c35e4ffc0db5706e93d1acd5b7d5ac2d Mon Sep 17 00:00:00 2001
From: Pierre Pronchery <khorben@defora.org>
Date: Mon, 17 Apr 2017 05:47:45 +0200
Subject: [PATCH] Report an error upon string_new_format(NULL)

---
 src/string.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/string.c b/src/string.c
index ffb53f9..c354430 100644
--- a/src/string.c
+++ b/src/string.c
@@ -76,6 +76,11 @@ String * string_new_format(String const * format, ...)
 	int len;
 	size_t s;
 
+	if(format == NULL)
+	{
+		error_set_code(-EINVAL, "%s", strerror(EINVAL));
+		return NULL;
+	}
 	va_start(ap, format);
 	len = vsnprintf(NULL, 0, format, ap);
 	va_end(ap);