diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug582766.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug582766.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+expected = 4;
+
+var fourth = { nextSibling: null };
+var third  = { nextSibling: fourth };
+var second = { nextSibling: third };
+var first  = { nextSibling: second };
+
+function f() {
+  let loopcount = 0;
+  for (let node = first; node; node = node.nextSibling) {
+    loopcount++;
+  }
+  return loopcount;
+}
+
+actual = f();
+
+assertEq(actual, expected);