Uncaught InferenceError: Inference failed for all members of AssignAttr in types checker #11356

# Code from a local fuzzing run

from collections.abc import GenericAlias

class C:
    pass

x = C.a

for GenericAlias.a in _:
    pass

Exception on node <Attribute.a l.6 at 0x7f316c6967b0> in file '/home/user/crash.py'
Traceback (most recent call last):
  File "pylint/pylint/utils/ast_walker.py", line 87, in walk
    callback(astroid)
    ~~~~~~~~^^^^^^^^^
  File "pylint/pylint/checkers/typecheck.py", line 1208, in visit_attribute
    attr_nodes = owner.getattr(node.attrname)
  File "astroid/astroid/nodes/scoped_nodes/scoped_nodes.py", line 2373, in getattr
    values += self._metaclass_lookup_attribute(name, context)
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "astroid/astroid/nodes/scoped_nodes/scoped_nodes.py", line 2399, in _metaclass_lookup_attribute
    attrs.update(cls_attributes)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "astroid/astroid/nodes/scoped_nodes/scoped_nodes.py", line 2410, in _get_attribute_from_metaclass
    for attr in bases._infer_stmts(attrs, context, frame=cls):
                ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/bases.py", line 203, in _infer_stmts
    raise InferenceError(
    ...<4 lines>...
    )
astroid.exceptions.InferenceError: Inference failed for all members of [<AssignAttr.a l.8 at 0x7f316c696a50>].