diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug762432.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug762432.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+function getter() { return 1; }
+function setter() { }
+function getDescriptor(name) {
+  if (name != 'prop')
+    throw "Unknown property: " + name;
+  return { configurable: true, enumerable: true, get: getter, set: setter };
+}
+function getNames() { return ['prop']; }
+var handler = {
+  getOwnPropertyDescriptor: getDescriptor,
+  getPropertyDescriptor: getDescriptor,
+  getOwnPropertyNames: getNames,
+  getPropertyNames: getNames,
+  defineProperty: function() {},
+  delete: function() {}
+};
+
+// Make sure that __lookup{Getter,Setter}__ works on proxies.
+var proxy = Proxy.create(handler);
+assertEq(Object.prototype.__lookupGetter__.call(proxy, 'prop'), getter);
+assertEq(Object.prototype.__lookupSetter__.call(proxy, 'prop'), setter);