diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug509982.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug509982.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function g() {
+    const e = 0;
+    return function () {
+        switch (7) {
+        case e:
+        }
+    };
+}
+
+for (var i = 0; i < 2; i++) {
+    let f = g;
+    f();
+}
+
+// Just test that we don't crash.