1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/iter-cache-null-proto.js b/js/src/jit-test/tests/basic/iter-cache-null-proto.js
new file mode 100644
index 0000000000..8e6af52a6b
--- /dev/null
+++ b/js/src/jit-test/tests/basic/iter-cache-null-proto.js
@@ -0,0 +1,11 @@
+function f() {
+    var o = {x: 0};
+    for (var i = 0; i < 20; i++) {
+        if ((i % 4) === 0)
+            Object.setPrototypeOf(o, null);
+        else
+            Object.setPrototypeOf(o, Object.prototype);
+        for (var x in o) {}
+    }
+}
+f();