False positive unsubscriptable-object

ChangeLog

@@ -223,6 +223,16 @@ Release date: TBA
   Closes pylint-dev/pylint#9015
 
 
+What's New in astroid 2.15.8?
+=============================
+Release date: TBA
+
+* Fix a regression in 2.15.7 for ``unsubscriptable-object``.
+
+  Closes #2305
+  Closes pylint-dev/pylint#9069
+
+
 What's New in astroid 2.15.7?
 =============================
 Release date: 2023-09-23

astroid/brain/brain_typing.py

@@ -17,6 +17,7 @@
 from astroid.builder import AstroidBuilder, _extract_single_node
 from astroid.const import PY39_PLUS, PY312_PLUS
 from astroid.exceptions import (
+    AstroidSyntaxError,
     AttributeInferenceError,
     InferenceError,
     UseInferenceDefault,
@@ -118,9 +119,7 @@ def looks_like_typing_typevar_or_newtype(node) -> bool:
     return False
 
 
-def infer_typing_typevar_or_newtype(
-    node: Call, context_itton: context.InferenceContext | None = None
-) -> Iterator[ClassDef]:
+def infer_typing_typevar_or_newtype(node, context_itton=None):
     """Infer a typing.TypeVar(...) or typing.NewType(...) call."""
     try:
         func = next(node.func.infer(context=context_itton))
@@ -136,14 +135,10 @@ def infer_typing_typevar_or_newtype(
         raise UseInferenceDefault
 
     typename = node.args[0].as_string().strip("'")
-    node = ClassDef(
-        name=typename,
-        lineno=node.lineno,
-        col_offset=node.col_offset,
-        parent=node.parent,
-        end_lineno=node.end_lineno,
-        end_col_offset=node.end_col_offset,
-    )
+    try:
+        node = extract_node(TYPING_TYPE_TEMPLATE.format(typename))
+    except AstroidSyntaxError as exc:
+        raise InferenceError from exc
     return node.infer(context=context_itton)
 
 

tests/brain/test_typing.py

@@ -2,7 +2,10 @@
 # For details: https://github.com/pylint-dev/astroid/blob/main/LICENSE
 # Copyright (c) https://github.com/pylint-dev/astroid/blob/main/CONTRIBUTORS.txt
 
-from astroid import builder, nodes
+import pytest
+
+from astroid import builder
+from astroid.exceptions import InferenceError
 
 
 def test_infer_typevar() -> None:
@@ -15,10 +18,8 @@ def test_infer_typevar() -> None:
     assign_node = builder.extract_node(
         """
     from typing import TypeVar
-    MyType = TypeVar('My.Type')
+    TypeVar('My.Type')
     """
     )
-    call = assign_node.value
-    inferred = next(call.infer())
-    assert isinstance(inferred, nodes.ClassDef)
-    assert inferred.name == "My.Type"
+    with pytest.raises(InferenceError):
+        assign_node.inferred()