PY-82707 Pycharm July 2025 EAP showing unreachable when using a subtype of Any

(cherry picked from commit c8a61ecc43754144679e5afc9f4623c02f558597)

IJ-MR-170092

GitOrigin-RevId: 612862aa2ce338a8f18e13197f483b936c9d0cdb

python/python-psi-impl/src/com/jetbrains/python/codeInsight/controlflow/PyTypeAssertionEvaluator.java

@@ -282,6 +282,7 @@ public class PyTypeAssertionEvaluator extends PyRecursiveElementVisitor {
   private static boolean match(@Nullable PyType expected, @Nullable PyType actual, @NotNull TypeEvalContext context) {
     return !(actual instanceof PyStructuralType) &&
            !PyTypeChecker.isUnknown(actual, context) &&
+           !(PyTypeUtil.inheritsAny(actual, context)) &&
            PyTypeChecker.match(expected, actual, context);
   }
 

python/python-psi-impl/src/com/jetbrains/python/psi/types/PyTypeUtil.java

@@ -182,4 +182,8 @@ public final class PyTypeUtil {
                                                      new PyClassTypeImpl(superClass, false));
     return PyTypeChecker.convertToType(type, superClassType, context);
   }
+  
+  public static boolean inheritsAny(@NotNull PyType type, @NotNull TypeEvalContext context) {
+    return type instanceof PyClassLikeType classLikeType && classLikeType.getAncestorTypes(context).contains(null);
+  }
 }

python/testSrc/com/jetbrains/python/inspections/PyUnreachableCodeInspectionTest.java

@@ -85,6 +85,25 @@ def func(x: Any | None = None):
         print("foo")
                    """);
   }
+  
+  // PY-82707
+  public void testClassInheritingFromAny() {
+    doTestByText("""
+from typing import Any
+
+class A(Any): ...
+
+a = A()
+if a is not None:
+    print("hi")  # reachable
+
+match a:
+    case int():
+        print()
+    case str():
+        print()  # reachable
+                   """);
+  }
 
   // PY-81729
   public void testTypeVarOrNoneAfterIsNotNoneCast(){