From a91abd0e8e36a6fa3d8cf373ec873dea083b39c2 Mon Sep 17 00:00:00 2001
From: Azat Khuzhin <azat@libevent.org>
Date: Thu, 25 Jun 2020 09:59:35 +0300
Subject: [PATCH] test: do not pass NULL to memcmp() in evbuffer_datacmp()
 helper

Fixes:
  runtime error: null pointer passed as argument 2, which is declared to never be null
(cherry picked from commit 6f152befb4523fd2e57c1a937e590f8ff87b7f15)
---
 test/regress_http.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/regress_http.c b/test/regress_http.c
index 217f1e00..f24e40ca 100644
--- a/test/regress_http.c
+++ b/test/regress_http.c
@@ -232,6 +232,8 @@ evbuffer_datacmp(struct evbuffer *buf, const char *s)
 		return -1;
 
 	d = evbuffer_pullup(buf, s_sz);
+	if (!d)
+		d = (unsigned char *)"";
 	if ((r = memcmp(d, s, s_sz)))
 		return r;