Fix get_errors method

src/stratis_cli/_error_reporting.py

@@ -79,19 +79,20 @@ def _interface_name_to_common_name(interface_name):
     raise StratisCliUnknownInterfaceError(interface_name)  # pragma: no cover
 
 
-def get_errors(exc: Exception):
+def get_errors(exc: BaseException):
     """
     Generates a sequence of exceptions starting with exc and following the chain
     of causes.
     """
-    while True:
-        yield exc
-        exc = getattr(exc, "__cause__") or getattr(exc, "__context__")
-        if exc is None:
-            return
+    yield exc
+    while exc.__cause__ is not None:
+        yield exc.__cause__
+        exc = exc.__cause__
 
 
-def _interpret_errors_0(error):
+def _interpret_errors_0(
+    error: dbus.exceptions.DBusException,
+):
     """
     Handle match on SCAE .*  DBE
       where:
@@ -121,7 +122,10 @@ def _interpret_errors_0(error):
     # running with a new major version and is supplying a different name on the
     # D-Bus than stratis is attempting to use. The second and third
     # possibilities are both covered by a single error message.
-    if error.get_dbus_name() == "org.freedesktop.DBus.Error.NameHasNoOwner":
+    if error.get_dbus_name() in (
+        "org.freedesktop.DBus.Error.NameHasNoOwner",
+        "org.freedesktop.DBus.Error.ServiceUnknown",
+    ):
         try:
             # pylint: disable=import-outside-toplevel
             # isort: THIRDPARTY