1 files changed, 45 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/auto-regress/bug637205.js b/js/src/jit-test/tests/auto-regress/bug637205.js
new file mode 100644
index 0000000000..9cb4f60b6d
--- /dev/null
+++ b/js/src/jit-test/tests/auto-regress/bug637205.js
@@ -0,0 +1,45 @@
+// Binary: cache/js-dbg-64-21e90d198613-linux
+// Flags:
+//
+load(libdir + "immutable-prototype.js");
+
+var x  = {};
+function jsTestDriverEnd()
+{
+  for (var optionName in x)
+  {
+  }
+  x = {};
+}
+
+var o2 = this;
+var o5 = Object.prototype;
+
+function f28(o) {
+  var _var_ = o;
+  if (globalPrototypeChainIsMutable())
+    _var_['__proto_'+'_'] = null;
+}
+
+function _var_(f7) {
+  function f15(o) {}
+}
+
+function f39(o) {
+  for(var j=0; j<5; j++) {
+    try { o.__proto__ = o2; } catch(e) {}
+  }
+}
+
+for(var i=0; i<11; i++) {
+  f39(o5);
+  f28(o2);
+}
+
+jsTestDriverEnd();
+
+{
+  delete Function;
+}
+
+jsTestDriverEnd();