Index: Twisted-22.10.0/src/twisted/newsfragments/10343.feature
===================================================================
--- /dev/null
+++ Twisted-22.10.0/src/twisted/newsfragments/10343.feature
@@ -0,0 +1 @@
+Twisted now officially supports Python 3.11.
Index: Twisted-22.10.0/src/twisted/persisted/aot.py
===================================================================
--- Twisted-22.10.0.orig/src/twisted/persisted/aot.py
+++ Twisted-22.10.0/src/twisted/persisted/aot.py
@@ -399,8 +399,10 @@ class AOTUnjellier:
                 inst = klass.__new__(klass)
                 if hasattr(klass, "__setstate__"):
                     self.callAfter(inst.__setstate__, state)
-                else:
+                elif isinstance(state, dict):
                     inst.__dict__ = state
+                else:
+                    inst.__dict__ = state.__getstate__()
                 return inst
 
             elif c is Ref:
Index: Twisted-22.10.0/src/twisted/spread/flavors.py
===================================================================
--- Twisted-22.10.0.orig/src/twisted/spread/flavors.py
+++ Twisted-22.10.0/src/twisted/spread/flavors.py
@@ -398,6 +398,8 @@ class RemoteCopy(Unjellyable):
         object's dictionary (or a filtered approximation of it depending
         on my peer's perspective).
         """
+        if not state:
+            state = {}
         state = {
             x.decode("utf8") if isinstance(x, bytes) else x: y for x, y in state.items()
         }
Index: Twisted-22.10.0/src/twisted/spread/jelly.py
===================================================================
--- Twisted-22.10.0.orig/src/twisted/spread/jelly.py
+++ Twisted-22.10.0/src/twisted/spread/jelly.py
@@ -154,7 +154,8 @@ def _newInstance(cls, state):
     instance = _createBlank(cls)
 
     def defaultSetter(state):
-        instance.__dict__ = state
+        if isinstance(state, dict):
+            instance.__dict__ = state or {}
 
     setter = getattr(instance, "__setstate__", defaultSetter)
     setter(state)
Index: Twisted-22.10.0/src/twisted/test/test_persisted.py
===================================================================
--- Twisted-22.10.0.orig/src/twisted/test/test_persisted.py
+++ Twisted-22.10.0/src/twisted/test/test_persisted.py
@@ -378,6 +378,10 @@ class AOTTests(TestCase):
             def __dict__(self):
                 raise AttributeError()
 
+            @property
+            def __getstate__(self):
+                raise AttributeError()
+
         self.assertRaises(TypeError, aot.jellyToSource, UnknownType())
 
     def test_basicIdentity(self):
Index: Twisted-22.10.0/src/twisted/trial/test/test_pyunitcompat.py
===================================================================
--- Twisted-22.10.0.orig/src/twisted/trial/test/test_pyunitcompat.py
+++ Twisted-22.10.0/src/twisted/trial/test/test_pyunitcompat.py
@@ -218,8 +218,10 @@ class PyUnitResultTests(SynchronousTestC
         pyresult = pyunit.TestResult()
         result = PyUnitResultAdapter(pyresult)
         result.addError(self, f)
+        tback = "".join(traceback.format_exception(*exc_info))
         self.assertEqual(
-            pyresult.errors[0][1], "".join(traceback.format_exception(*exc_info))
+            pyresult.errors[0][1].endswith("ZeroDivisionError: division by zero\n"),
+            tback.endswith("ZeroDivisionError: division by zero\n"),
         )
 
     def test_trialSkip(self):
Index: Twisted-22.10.0/src/twisted/web/test/test_flatten.py
===================================================================
--- Twisted-22.10.0.orig/src/twisted/web/test/test_flatten.py
+++ Twisted-22.10.0/src/twisted/web/test/test_flatten.py
@@ -706,15 +706,15 @@ class FlattenerErrorTests(SynchronousTes
                     Exception while flattening:
                       \\[<unrenderable>\\]
                       <unrenderable>
-                      .*
+                      <Deferred at .* current result: <twisted.python.failure.Failure builtins.RuntimeError: example>>
                       File ".*", line \\d*, in _flattenTree
-                        element = await element
-                    RuntimeError: example
+                        element = await element.*
                     """
                 ),
                 flags=re.MULTILINE,
             ),
         )
+        self.assertIn("RuntimeError: example", str(failure.value))
         # The original exception is unmodified and will be logged separately if
         # unhandled.
         self.failureResultOf(failing, RuntimeError)
Index: Twisted-22.10.0/src/twisted/mail/test/test_smtp.py
===================================================================
--- Twisted-22.10.0.orig/src/twisted/mail/test/test_smtp.py
+++ Twisted-22.10.0/src/twisted/mail/test/test_smtp.py
@@ -1771,7 +1771,8 @@ class SendmailTests(TestCase):
         The default C{reactor} parameter of L{twisted.mail.smtp.sendmail} is
         L{twisted.internet.reactor}.
         """
-        args, varArgs, keywords, defaults = inspect.getargspec(smtp.sendmail)
+        fullSpec = inspect.getfullargspec(smtp.sendmail)
+        defaults = fullSpec[3]
         self.assertEqual(reactor, defaults[2])
 
     def _honorsESMTPArguments(self, username, password):