diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug595963-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug595963-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+function remove(k, L) {
+  for (var i in k) {
+    if (i == L)
+      k.splice(L, 3);
+  }
+}
+function f(k) {
+  var L = 0;
+  for (var i in k) {
+    if (L == 1)
+      remove(k, L);
+    L++;
+    assertEq(k[i], 3);
+  }
+  assertEq(L, 4);
+}
+
+var a = [3, 3, 3, 3, 3, 3, 3];
+f(a);