I recently debugged an issue where a client would never receive a response from a method call if said method call returned a dbus.Error. The client would basically just time out.

I attached a debugger and started looking for the cause and found this:

1. An error is returned when encoding the error

2. The error bubbles

3. The error bubbles

4. The error bubbles

5. The error is silently dropped

The cause was that the error's name was not a valid name. It was akin to failed to perform method rather than org.freedesktop.DBus.Error.InvalidArgs.

For v6 I suggest for that validation to happen in dbus.NewError, with an error returned if it fails. But for v5 it would be really nice to surface this error one way or another.