1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/tests/non262/object/setPrototypeOf-same-value.js b/js/src/tests/non262/object/setPrototypeOf-same-value.js
new file mode 100644
index 0000000000..3375509462
--- /dev/null
+++ b/js/src/tests/non262/object/setPrototypeOf-same-value.js
@@ -0,0 +1,11 @@
+// Setting a "new" prototype to the current [[Prototype]] value should never fail
+
+var x = {}, t = Object.create(x);
+Object.preventExtensions(t);
+// Should not fail, because it is the same [[Prototype]] value
+Object.setPrototypeOf(t, x);
+
+// Object.prototype's [[Prototype]] is immutable, make sure we can still set null
+Object.setPrototypeOf(Object.prototype, null);
+
+reportCompare(true, true);