1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug643243.js b/js/src/jit-test/tests/basic/bug643243.js
new file mode 100644
index 0000000000..71530c56a1
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug643243.js
@@ -0,0 +1,11 @@
+{
+    function newSandbox(n) {}
+}
+var o12 = Float32Array.prototype;
+function f12(o) {
+    eval('o')['__proto_' + '_'] = null;
+}
+for (var i = 0; i < 14; i++) {
+    gc()
+    new f12(o12);
+}