From 5048155f575856b0a5a07d95dac72b90bee9d7bb Mon Sep 17 00:00:00 2001
From: James Stevenson <james@stev.org>
Date: Thu, 25 Feb 2016 22:36:14 +0000
Subject: [PATCH] bus: Prevent gst_bus_add_watch_full_unlocked from a segfault
 if priv->poll == NULL

This happens if the process runs out of file descriptors. Better print
a critical warning instead of just crashing.

https://bugzilla.gnome.org/show_bug.cgi?id=762702
---
 gst/gstbus.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gst/gstbus.c b/gst/gstbus.c
index 237507f797..d24a935ee8 100644
--- a/gst/gstbus.c
+++ b/gst/gstbus.c
@@ -892,6 +892,10 @@ gst_bus_add_watch_full_unlocked (GstBus * bus, gint priority,
   }
 
   source = gst_bus_create_watch (bus);
+  if (!source) {
+    g_critical ("Creating bus watch failed");
+    return 0;
+  }
 
   if (priority != G_PRIORITY_DEFAULT)
     g_source_set_priority (source, priority);