ES6 symbols: filter symbols form for-in loops and Object.keys

src/proxy.js

Index: src/proxy.js
diff --git a/src/proxy.js b/src/proxy.js
index 285d33c7fa1a208607d13698a48250b35129a76c..d402449145174afc9a82695bc03b0d11a6cb1e8c 100644
--- a/src/proxy.js
+++ b/src/proxy.js
@@ -163,6 +163,7 @@ function DerivedKeysTrap() {
   var enumerableNames = []
   for (var i = 0, count = 0; i < names.length; ++i) {
     var name = names[i]
+    if (IS_SYMBOL(name)) continue
     var desc = this.getOwnPropertyDescriptor(TO_STRING_INLINE(name))
     if (!IS_UNDEFINED(desc) && desc.enumerable) {
       enumerableNames[count++] = names[i]
@@ -176,6 +177,7 @@ function DerivedEnumerateTrap() {
   var enumerableNames = []
   for (var i = 0, count = 0; i < names.length; ++i) {
     var name = names[i]
+    if (IS_SYMBOL(name)) continue
     var desc = this.getPropertyDescriptor(TO_STRING_INLINE(name))
     if (!IS_UNDEFINED(desc) && desc.enumerable) {
       enumerableNames[count++] = names[i]
@@ -189,6 +191,6 @@ function ProxyEnumerate(proxy) {
   if (IS_UNDEFINED(handler.enumerate)) {
     return %Apply(DerivedEnumerateTrap, handler, [], 0, 0)
   } else {
-    return ToNameArray(handler.enumerate(), "enumerate")
+    return ToNameArray(handler.enumerate(), "enumerate", false)
   }
 }