From bb2de1fd488bf8b7660ad578fe331eb50f903e12 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Janouch?= <p.janouch@gmail.com>
Date: Sun, 16 Aug 2015 21:56:47 +0200
Subject: [PATCH] Make an assertion give more information

---
 liberty.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/liberty.c b/liberty.c
index c6b38b8..c559e9b 100644
--- a/liberty.c
+++ b/liberty.c
@@ -679,7 +679,8 @@ static bool
 set_blocking (int fd, bool blocking)
 {
 	int flags = fcntl (fd, F_GETFL);
-	hard_assert (flags != -1);
+	if (flags == -1)
+		exit_fatal ("%s: %s", "fcntl", strerror (errno));
 
 	bool prev = !(flags & O_NONBLOCK);
 	if (blocking)