1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug643249.js b/js/src/jit-test/tests/basic/bug643249.js
new file mode 100644
index 000000000..86a000228
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug643249.js
@@ -0,0 +1,13 @@
+{
+    function x() {}
+}
+for (i = 0; i < 10; i++) {
+    _someglobal_ = /a/;
+    (function() {
+        return function() {
+            return _someglobal_
+        } ()
+    } () == /a/);
+    gc();
+    try { _someglobal_ = new Function.__lookupSetter__ } catch (e) {}
+}