diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug547791.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug547791.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+
+function Bext(k) {
+    if (k > 0) {
+        let i = k + 1;
+        if (k == 10) {
+            function x () { i = 2; }
+	}
+        Bext(i - 2);
+        Bext(i - 2);
+    }
+    return 0;
+}
+
+function f() {
+    Bext(12);
+}
+
+f();
+
+/* Don't assert. */
+