diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testFunctionStatementAliasLocals.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testFunctionStatementAliasLocals.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+function f1(b) {
+    var w = 3;
+    if (b)
+        function w() {}
+    return w;
+}
+assertEq(typeof f1(true), "function");
+assertEq(f1(false), 3);
+
+function f2(b, w) {
+    if (b)
+        function w() {}
+    return w;
+}
+assertEq(typeof f2(true, 3), "function");
+assertEq(f2(false, 3), 3);
+
+function f3(b) {
+    let (w = 3) {
+        if (b)
+            function w() {}
+        return w;
+    }
+}
+assertEq(f3(true, 3), 3);
+assertEq(f3(false), 3);