PY-28032 Optional[Any] in a type hint is not coerced into plain Any

python/src/com/jetbrains/python/codeInsight/typing/PyTypingTypeProvider.java

@@ -961,9 +961,9 @@ public class PyTypingTypeProvider extends PyTypeProviderBase {
       if (operandNames.contains(OPTIONAL)) {
         final PyExpression indexExpr = subscriptionExpr.getIndexExpression();
         if (indexExpr != null) {
-          final PyType type = Ref.deref(getType(indexExpr, context));
-          if (type != null) {
-            return Ref.create(PyUnionType.union(type, PyNoneType.INSTANCE));
+          final Ref<PyType> typeRef = getType(indexExpr, context);
+          if (typeRef != null) {
+            return Ref.create(PyUnionType.union(typeRef.get(), PyNoneType.INSTANCE));
           }
         }
         return Ref.create();

python/testSrc/com/jetbrains/python/PyTypingTest.java

@@ -275,6 +275,15 @@ public class PyTypingTest extends PyTestCase {
            "    pass\n");
   }
 
+  // PY-28032
+  public void testOptionalOfAny() {
+    doTest("Optional[Any]",
+           "from typing import Optional, Any\n" +
+           "\n" +
+           "x = None  # type: Optional[Any]\n" +
+           "expr = x\n");
+  }
+
   public void testOptionalFromDefaultNone() {
     doTest("Optional[int]",
            "def foo(expr: int = None):\n" +