diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug549521.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug549521.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+function f(y) {
+    if (y)
+        return;
+    let(x) {
+        for (;;) {}
+    }
+}
+
+
+/* Don't assert. */
+f(1);
+