From 321f91407107a0c83fcfa32d7550f4371ec76918 Mon Sep 17 00:00:00 2001
From: Philip Withnall <withnall@endlessm.com>
Date: Mon, 18 Feb 2019 13:23:13 +0000
Subject: [PATCH] gerror: Add a missing precondition assertion in documentation

Inspired by !673.

Signed-off-by: Philip Withnall <withnall@endlessm.com>
---
 glib/gerror.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/glib/gerror.c b/glib/gerror.c
index 236e52869..b190d6881 100644
--- a/glib/gerror.c
+++ b/glib/gerror.c
@@ -126,6 +126,8 @@
  *   gint fd;
  *   int saved_errno;
  *
+ *   g_return_val_if_fail (error == NULL || *error == NULL, -1);
+ *
  *   fd = open ("file.txt", O_RDONLY);
  *   saved_errno = errno;
  *