1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/getelem-proto.js b/js/src/jit-test/tests/ion/getelem-proto.js
new file mode 100644
index 0000000000..5e9be37d12
--- /dev/null
+++ b/js/src/jit-test/tests/ion/getelem-proto.js
@@ -0,0 +1,18 @@
+var a = [1, , 2];
+Array.prototype[1] = 3;
+
+function f(arr) {
+    return arr[0] + arr[1] + arr[2];
+}
+for (var i=0; i<70; i++) {
+    assertEq(f(a), 6);
+}
+
+Object.defineProperty(Array.prototype, "1", {
+    get: function() {
+        return 1234;
+    }
+});
+
+assertEq(f(a), 1237);
+assertEq(f(a), 1237);