DBus has inaccessible constructor in 19.04

[Karl Speer]

I updated my OS to Ubuntu 19.04 recently. Upon doing so, I started to see the following exception:

GStreamer version 1.12.2.0, gapless: False, replaygain: False

Unhandled Exception:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.MethodAccessException: Method `NDesk.DBus.BusObject..ctor()' is inaccessible from method `IBusProxy..ctor()'
  at (wrapper managed-to-native) System.Reflection.MonoCMethod.InternalInvoke(System.Reflection.MonoCMethod,object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005] in <6649516e5b3542319fb262b421af0adb>:0
   --- End of inner exception stack trace ---
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x0001a] in <6649516e5b3542319fb262b421af0adb>:0
  at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic, System.Boolean wrapExceptions) [0x000a8] in <6649516e5b3542319fb262b421af0adb>:0
  at System.RuntimeType.CreateInstanceSlow (System.Boolean publicOnly, System.Boolean wrapExceptions, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x00009] in <6649516e5b3542319fb262b421af0adb>:0
  at System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Boolean wrapExceptions, System.Threading.StackCrawlMark& stackMark) [0x00027] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic, System.Boolean wrapExceptions) [0x00020] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) [0x00000] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Activator.CreateInstance (System.Type type) [0x00000] in <6649516e5b3542319fb262b421af0adb>:0
  at NDesk.DBus.BusObject.GetObject (NDesk.DBus.Connection conn, System.String bus_name, NDesk.DBus.ObjectPath object_path, System.Type declType) [0x00008] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Connection.GetObject (System.Type type, System.String bus_name, NDesk.DBus.ObjectPath path) [0x0000d] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Connection.GetObject[T] (System.String bus_name, NDesk.DBus.ObjectPath path) [0x00001] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Bus..ctor (System.String address) [0x0000f] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Bus.Open (System.String address) [0x00033] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at Mono.Zeroconf.Providers.AvahiDBus.DBusManager.ConnectToSystemBus () [0x0001f] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at Mono.Zeroconf.Providers.AvahiDBus.DBusManager.IterateThread (System.Object o) [0x00012] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context (System.Object state) [0x00007] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00021] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <6649516e5b3542319fb262b421af0adb>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.MethodAccessException: Method `NDesk.DBus.BusObject..ctor()' is inaccessible from method `IBusProxy..ctor()'
  at (wrapper managed-to-native) System.Reflection.MonoCMethod.InternalInvoke(System.Reflection.MonoCMethod,object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005] in <6649516e5b3542319fb262b421af0adb>:0
   --- End of inner exception stack trace ---
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x0001a] in <6649516e5b3542319fb262b421af0adb>:0
  at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic, System.Boolean wrapExceptions) [0x000a8] in <6649516e5b3542319fb262b421af0adb>:0
  at System.RuntimeType.CreateInstanceSlow (System.Boolean publicOnly, System.Boolean wrapExceptions, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x00009] in <6649516e5b3542319fb262b421af0adb>:0
  at System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Boolean wrapExceptions, System.Threading.StackCrawlMark& stackMark) [0x00027] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic, System.Boolean wrapExceptions) [0x00020] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) [0x00000] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Activator.CreateInstance (System.Type type) [0x00000] in <6649516e5b3542319fb262b421af0adb>:0
  at NDesk.DBus.BusObject.GetObject (NDesk.DBus.Connection conn, System.String bus_name, NDesk.DBus.ObjectPath object_path, System.Type declType) [0x00008] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Connection.GetObject (System.Type type, System.String bus_name, NDesk.DBus.ObjectPath path) [0x0000d] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Connection.GetObject[T] (System.String bus_name, NDesk.DBus.ObjectPath path) [0x00001] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Bus..ctor (System.String address) [0x0000f] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at NDesk.DBus.Bus.Open (System.String address) [0x00033] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at Mono.Zeroconf.Providers.AvahiDBus.DBusManager.ConnectToSystemBus () [0x0001f] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at Mono.Zeroconf.Providers.AvahiDBus.DBusManager.IterateThread (System.Object o) [0x00012] in <6f993bb1a1414adf8517b25c86b39e83>:0
  at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context (System.Object state) [0x00007] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00021] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <6649516e5b3542319fb262b421af0adb>:0
  at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <6649516e5b3542319fb262b421af0adb>:0

All the other solutions are years old don't seem to apply: mono is up to date, this doesn't use DBus.Sharp, etc.

The program that is throwing the error is Banshee. I know the project is long abandoned, but it was working up until the upgrade, so I am hoping that I can either downgrade a package or do something to keep this program zombified.

Does anyone know what I need to adjust to fix this?

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1827364/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Karl Speer (cidthecoatrack)]

According to the stack trace, it probably comes from this package, but it might actually be related to mono, not gstreamer