1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug620838.js b/js/src/jit-test/tests/basic/bug620838.js
new file mode 100644
index 0000000000..c82933ae80
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug620838.js
@@ -0,0 +1,22 @@
+function g() {
+    return "global";
+}
+
+function q(fun) {
+    return fun();
+}
+
+function f(x) {
+    if (x) {
+        function g() {
+            return "local";
+        }
+        var ans = q(function() {
+            return g();
+        });
+    }
+    g = null;
+    return ans;
+}
+
+assertEq(f(true), "local");