Upload Kmake

deps/v8/test/mjsunit/maglev/regress-402646504.js

@@ -0,0 +1,30 @@
+// Copyright 2025 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --maglev --no-always-turbofan
+
+const obj = {
+  func(optimize) {
+      const arrowFunc = () => {
+        return super.length;
+      };
+      %PrepareFunctionForOptimization(arrowFunc);
+      if (optimize) {
+        %OptimizeMaglevOnNextCall(arrowFunc);
+      }
+      return arrowFunc();
+  }
+};
+
+// Make super.length polymorphic:
+// Case 1:
+assertEquals(undefined, obj.func(false));
+
+// Case 2:
+const u8Arr = new Uint8Array(20);
+obj.__proto__ = u8Arr;
+assertThrows(() => { obj.func(false); }, TypeError);
+
+// Optimize for Maglev.
+assertThrows(() => { obj.func(true); }, TypeError);