commit 1bc4326ceaff67eff0e1f2b612c50cdf01804b99
Author: Philip Langdale <philipl@overt.org>
Date:   Sat Mar 23 22:55:40 2013 -0700

    Daemon: Ensure monitors are not prematurally finalized.
    
    If a monitor is being cleaned up due to the backend disappearing,
    we could see the monitor being finalized as a result of removing
    a subscriber, leading to a segfault as it continues to access
    its internal state.

diff --git a/daemon/gvfsmonitor.c b/daemon/gvfsmonitor.c
index 12ec6b9..cdf0dc2 100644
--- a/daemon/gvfsmonitor.c
+++ b/daemon/gvfsmonitor.c
@@ -71,7 +71,14 @@ backend_died (GVfsMonitor *monitor,
 	      GObject     *old_backend)
 {
   Subscriber *subscriber;
-  
+
+  /*
+   * Take an extra ref on the monitor because
+   * unsubscribing may lead to the last ref
+   * being released.
+   */
+  g_object_ref (G_OBJECT (monitor));
+
   monitor->priv->backend = NULL;
 
   while (monitor->priv->subscribers != NULL)
@@ -79,6 +86,8 @@ backend_died (GVfsMonitor *monitor,
       subscriber = monitor->priv->subscribers->data;
       unsubscribe (subscriber);
     }
+
+  g_object_unref (G_OBJECT (monitor));
 }
 
 static void
