1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/tests/non262/Tuple/prototype/slice/tuple-length-internal.js b/js/src/tests/non262/Tuple/prototype/slice/tuple-length-internal.js
new file mode 100644
index 0000000000..f0fff9693e
--- /dev/null
+++ b/js/src/tests/non262/Tuple/prototype/slice/tuple-length-internal.js
@@ -0,0 +1,23 @@
+// |reftest| skip-if(!this.hasOwnProperty("Tuple"))
+
+/* Ensure that slice uses internal length and not length property */
+
+
+var getCalls = 0;
+var desc = {
+  get: function getLen() {
+    getCalls++;
+    return 0;
+  }
+};
+
+Object.defineProperty(Tuple.prototype, "length", desc);
+
+var sample = Object(#[42, 43]);
+
+var result = sample.slice();
+
+assertEq(getCalls, 0, "ignores length properties");
+assertEq(result, #[42, 43]);
+
+reportCompare(0, 0);