1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/unboxed-object-set-property.js b/js/src/jit-test/tests/basic/unboxed-object-set-property.js
new file mode 100644
index 000000000..fdcfcf6b2
--- /dev/null
+++ b/js/src/jit-test/tests/basic/unboxed-object-set-property.js
@@ -0,0 +1,31 @@
+
+// Use the correct receiver when non-native objects are prototypes of other objects.
+
+function Thing(a, b) {
+    this.a = a;
+    this.b = b;
+}
+
+function foo() {
+    var array = [];
+    for (var i = 0; i < 10000; i++)
+        array.push(new Thing(i, i + 1));
+
+    var proto = new Thing(1, 2);
+    var obj = Object.create(proto);
+
+    Object.defineProperty(Thing.prototype, "c", {set:function() { this.d = 0; }});
+    obj.c = 3;
+    assertEq(obj.c, undefined);
+    assertEq(obj.d, 0);
+    assertEq(obj.hasOwnProperty("d"), true);
+    assertEq(proto.d, undefined);
+    assertEq(proto.hasOwnProperty("d"), false);
+
+    obj.a = 3;
+    assertEq(obj.a, 3);
+    assertEq(proto.a, 1);
+    assertEq(obj.hasOwnProperty("a"), true);
+}
+
+foo();