Error when making concurrent calls to DBus Service.

[zacharyrote]

When making concurrent calls to a service on the DBus I sometimes get the following error:

process 7670: arguments to dbus_pending_call_steal_reply() were incorrect, assertion "pending != NULL" failed in file dbus-pending-call.c line 672.
This is normally a bug in some application using the D-Bus library.
Segmentation fault