Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object
  at Mono.Zeroconf.Providers.AvahiDBus.BrowseService.DisposeResolver () [0x0002e] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/Mono.Zeroconf.Providers.AvahiDBus/BrowseService.cs:65
  at Mono.Zeroconf.Providers.AvahiDBus.BrowseService.Dispose () [0x00013] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/Mono.Zeroconf.Providers.AvahiDBus/BrowseService.cs:56
  at Mono.Zeroconf.Providers.AvahiDBus.ServiceBrowser.OnItemRemove (Int32 interface, Protocol protocol, System.String name, System.String type, System.String domain, LookupResultFlags flags) [0x0002a] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/Mono.Zeroconf.Providers.AvahiDBus/ServiceBrowser.cs:139
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <filename unknown>:0
  at DBus.Connection.HandleSignal (DBus.Protocol.Message msg) [0x00106] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/Connection.cs:349
  at DBus.Connection.DispatchSignals () [0x000e8] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/Connection.cs:228
  at DBus.Protocol.PendingCall.get_Reply () [0x00059] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/PendingCall.cs:35
  at DBus.Connection.SendWithReplyAndBlock (DBus.Protocol.Message msg) [0x00008] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/Connection.cs:173
  at DBus.BusObject.SendMethodCall (System.String iface, System.String member, System.String inSigStr, DBus.Protocol.MessageWriter writer, System.Type retType, System.Exception& exception) [0x000a0] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/BusObject.cs:126
  at org.freedesktop.DBus.IBusProxy.RemoveMatch (System.String rule) [0x00000] in <filename unknown>:0
  at DBus.Bus.RemoveMatch (System.String rule) [0x00000] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/Bus.cs:137
  at DBus.BusObject.ToggleSignal (System.String iface, System.String member, System.Delegate dlg, Boolean adding) [0x0010e] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/BusObject.cs:74
  at Mono.Zeroconf.Providers.AvahiDBus.IAvahiServiceResolverProxy.remove_Failure (Mono.Zeroconf.Providers.AvahiDBus.ServiceResolverErrorHandler value) [0x00000] in <filename unknown>:0
  at Mono.Zeroconf.Providers.AvahiDBus.BrowseService.DisposeResolver () [0x00017] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/Mono.Zeroconf.Providers.AvahiDBus/BrowseService.cs:64
  at Mono.Zeroconf.Providers.AvahiDBus.BrowseService.Dispose () [0x00013] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/Mono.Zeroconf.Providers.AvahiDBus/BrowseService.cs:56
  at Mono.Zeroconf.Providers.AvahiDBus.ServiceBrowser.OnItemRemove (Int32 interface, Protocol protocol, System.String name, System.String type, System.String domain, LookupResultFlags flags) [0x0002a] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/Mono.Zeroconf.Providers.AvahiDBus/ServiceBrowser.cs:139
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <filename unknown>:0
  at DBus.Connection.HandleSignal (DBus.Protocol.Message msg) [0x00106] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/Connection.cs:349
  at DBus.Connection.DispatchSignals () [0x000e8] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/Connection.cs:228
  at DBus.Connection.Iterate () [0x00013] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/dbus-sharp/Connection.cs:238
  at Mono.Zeroconf.Providers.AvahiDBus.DBusManager.IterateThread (System.Object o) [0x0002e] in /build/predictable-path/mono-zeroconf-0.9.0/src/Mono.Zeroconf.Providers.AvahiDBus/Mono.Zeroconf.Providers.AvahiDBus/DBusManager.cs:72
