Comment 2 for bug 1228841

StacktraceTop:
 g_dbus_object_get_interface (object=0x0, interface_name=interface_name@entry=0xb775c0ec "org.freedesktop.UDisks2.PartitionTable") at /build/buildd/glib2.0-2.37.93/./gio/gdbusobject.c:144
 udisks_object_get_partition_table (object=0x0) at udisks-generated.c:30830
 gdu_utils_is_in_use_full (client=0x86be740, object=<optimized out>, filesystem_to_unmount_out=filesystem_to_unmount_out@entry=0xbfdc3a18, encrypted_to_lock_out=encrypted_to_lock_out@entry=0xbfdc3a1c) at gduutils.c:944
 unuse_data_iterate (data=0xb4c13508) at gduutils.c:1136
 gdu_utils_ensure_unused_list (client=0x86be740, parent_window=0x8760228, objects=objects@entry=0x86c3a50, callback=callback@entry=0x8060680 <ensure_list_cb>, cancellable=cancellable@entry=0x0, user_data=user_data@entry=0x883f948) at gduutils.c:1200