abrt 1.0.0 detected a crash.

How to reproduce
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1. Don't know
2.
3.

Comment
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After installing gvfs for the first time, I noticed the following error in the terminal:

(firefox:15458): GVFS-RemoteVolumeMonitor-WARNING **: invoking IsSupported() failed for remote volume monitor with dbus name org.gtk.Private.GduVolumeMonitor: org.freedesktop.DBus.Error.Spawn.ChildSignaled: Process /usr/libexec/gvfs-gdu-volume-monitor received signal 11

The backtrace shows pool=NULL. Looking up the stack shows this pointer was assigned in 

gvfs-1.4.2/monitor/gdu/ggduvolumemonitor.c:433
  monitor->pool = gdu_pool_new ();

It looks like this need to check for a null pointer being returned (which happens if there is a problem with dbus).

backtrace
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Core was generated by `/usr/libexec/gvfs-gdu-volume-monitor'.
Program terminated with signal 11, Segmentation fault.
#0  gdu_pool_get_presentables (pool=0x0) at gdu-pool.c:1381
1381	        ret = g_list_copy (pool->priv->presentables);

Thread 1 (Thread 15492):
#0  gdu_pool_get_presentables (pool=0x0) at gdu-pool.c:1381
        ret = 0x8094020 = {0x8093db8, 

cmdline: /usr/libexec/gvfs-gdu-volume-monitor
component: gvfs
executable: /usr/libexec/gvfs-gdu-volume-monitor
kernel: 2.6.31.6-145.fc12.i686
package: gvfs-1.4.2-1.fc12
rating: 4
reason: Process was terminated by signal 11