Fix stringified bare ClassVar type hints

Python 3.9 and 3.10 reject a bare ClassVar while evaluating a
ForwardRef, so get_type_hints() raises for postponed annotations.
Evaluate class annotations through the newer class-aware path and allow
the bare ClassVar special form, with coverage for inherited hints.

Fixes #643

Author: Sanjays2402

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 No user-facing changes since 4.16.0rc2.
 
+- Fix `get_type_hints()` raising `TypeError` for a stringified bare `ClassVar`
+  annotation on Python 3.9 and 3.10.
+
 # Release 4.16.0rc2 (June 25, 2026)
 
 - Avoid a `DeprecationWarning` when `deprecated` is applied to a coroutine function on

src/test_typing_extensions.py

@@ -5648,6 +5648,18 @@ def test_compatibility(self):
 
 
 class GetTypeHintsTests(BaseTestCase):
+    def test_get_type_hints_lone_stringified_classvar(self):
+        class Parent:
+            parent: 'ClassVar' = 1
+
+        class Child(Parent):
+            child: 'typing.ClassVar' = 2
+
+        self.assertEqual(
+            get_type_hints(Child, globals()),
+            {'parent': ClassVar, 'child': typing.ClassVar},
+        )
+
     def test_get_type_hints(self):
         def foobar(x: List['X']): ...
         X = Annotated[int, (1, 10)]

src/typing_extensions.py

@@ -1602,9 +1602,37 @@ def get_type_hints(obj, globalns=None, localns=None, include_extras=False):
         - If two dict arguments are passed, they specify globals and
           locals, respectively.
         """
-        hint = typing.get_type_hints(
-            obj, globalns=globalns, localns=localns, include_extras=True
-        )
+        if sys.version_info < (3, 11) and isinstance(obj, type):
+            hint = {}
+            for base in reversed(obj.__mro__):
+                base_globals = (
+                    getattr(sys.modules.get(base.__module__), '__dict__', {})
+                    if globalns is None else globalns
+                )
+                annotations = base.__dict__.get('__annotations__', {})
+                if isinstance(annotations, _types.GetSetDescriptorType):
+                    annotations = {}
+                base_locals = dict(vars(base)) if localns is None else localns
+                if localns is None and globalns is None:
+                    base_globals, base_locals = base_locals, base_globals
+                for name, value in annotations.items():
+                    if value is None:
+                        value = type(None)
+                    elif isinstance(value, str):
+                        evaluated = eval(value, base_globals, base_locals)
+                        if evaluated is ClassVar:
+                            value = evaluated
+                        else:
+                            value = ForwardRef(
+                                value, is_argument=False, is_class=True
+                            )
+                    hint[name] = typing._eval_type(
+                        value, base_globals, base_locals
+                    )
+        else:
+            hint = typing.get_type_hints(
+                obj, globalns=globalns, localns=localns, include_extras=True
+            )
         # Breakpoint: https://github.com/python/cpython/pull/30304
         if sys.version_info < (3, 11):
             _clean_optional(obj, hint, globalns, localns)