GeezerVison

from annotationlib import get_annotations, Format

def boom():
    obj = object()
    class RaisesAttributeError:
        attriberr: obj.missing
    get_annotations(RaisesAttributeError, format=Format.FORWARDREF)

boom()

Traceback (most recent call last):
  File "C:\Users\ducks\Source\cpython\.cache\annotation_examine.py", line 9, in <module>
    boom()
    ~~~~^^
  File "C:\Users\ducks\Source\cpython\.cache\annotation_examine.py", line 7, in boom
    get_annotations(RaisesAttributeError, format=Format.FORWARDREF)
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ducks\Source\cpython\Lib\annotationlib.py", line 778, in get_annotations
    ann = _get_and_call_annotate(obj, format)
  File "C:\Users\ducks\Source\cpython\Lib\annotationlib.py", line 902, in _get_and_call_annotate
    ann = call_annotate_function(annotate, format, owner=obj)
  File "C:\Users\ducks\Source\cpython\Lib\annotationlib.py", line 629, in call_annotate_function
    result = func(Format.VALUE_WITH_FAKE_GLOBALS)
  File "C:\Users\ducks\Source\cpython\.cache\annotation_examine.py", line 6, in __annotate__
    attriberr: obj.missing
               ^^^^^^^^^^^
  File "C:\Users\ducks\Source\cpython\Lib\annotationlib.py", line 380, in __getattr__
    return self.__make_new(ast.Attribute(self.__get_ast(), attr))
           ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ducks\Source\cpython\Lib\annotationlib.py", line 358, in __make_new
    self.__stringifier_dict__.stringifiers.append(stringifier)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'builtin_function_or_method' object has no attribute 'stringifiers'

    def test_attributeerror_handled(self):
        class MissingAttrib:
            pass
        
        class RaisesAttributeError:
            attriberr: MissingAttrib.missing

        with self.assertRaises(AttributeError):
            get_annotations(RaisesAttributeError, format=Format.VALUE)

        self.assertEqual(
            get_annotations(RaisesAttributeError, format=Format.FORWARDREF),
            {
                "attriberr": support.EqualToForwardRef(
                    "MissingAttrib.missing", 
                    owner=RaisesAttributeError,
                    is_class=True,
                )
            }
        )

        self.assertEqual(
            get_annotations(RaisesAttributeError, format=Format.STRING),
            {"attriberr": "MissingAttrib.missing"}
        )