[es6] don't throw if argument is non-object (O.freeze, O.seal, O.preventExtensions)

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 4ba546b0fbca1765dd631af96f2c7ec0ef81759a..1920b088ab381f28c4cb3b0eb463e07d6134c3bb 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -1241,9 +1241,7 @@ function ProxyFix(obj) {
 
 // ES5 section 15.2.3.8.
 function ObjectSealJS(obj) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("called_on_non_object", ["Object.seal"]);
-  }
+  if (!IS_SPEC_OBJECT(obj)) return obj;
   var isProxy = %_IsJSProxy(obj);
   if (isProxy || %HasSloppyArgumentsElements(obj) || %IsObserved(obj)) {
     if (isProxy) {
@@ -1270,9 +1268,7 @@ function ObjectSealJS(obj) {
 
 // ES5 section 15.2.3.9.
 function ObjectFreezeJS(obj) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("called_on_non_object", ["Object.freeze"]);
-  }
+  if (!IS_SPEC_OBJECT(obj)) return obj;
   var isProxy = %_IsJSProxy(obj);
   if (isProxy || %HasSloppyArgumentsElements(obj) || %IsObserved(obj)) {
     if (isProxy) {
@@ -1300,9 +1296,7 @@ function ObjectFreezeJS(obj) {
 
 // ES5 section 15.2.3.10
 function ObjectPreventExtension(obj) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("called_on_non_object", ["Object.preventExtension"]);
-  }
+  if (!IS_SPEC_OBJECT(obj)) return obj;
   if (%_IsJSProxy(obj)) {
     ProxyFix(obj);
   }
@@ -1313,9 +1307,7 @@ function ObjectPreventExtension(obj) {
 
 // ES5 section 15.2.3.11
 function ObjectIsSealed(obj) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("called_on_non_object", ["Object.isSealed"]);
-  }
+  if (!IS_SPEC_OBJECT(obj)) return true;
   if (%_IsJSProxy(obj)) {
     return false;
   }
@@ -1336,9 +1328,7 @@ function ObjectIsSealed(obj) {
 
 // ES5 section 15.2.3.12
 function ObjectIsFrozen(obj) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("called_on_non_object", ["Object.isFrozen"]);
-  }
+  if (!IS_SPEC_OBJECT(obj)) return true;
   if (%_IsJSProxy(obj)) {
     return false;
   }
@@ -1358,9 +1348,7 @@ function ObjectIsFrozen(obj) {
 
 // ES5 section 15.2.3.13
 function ObjectIsExtensible(obj) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("called_on_non_object", ["Object.isExtensible"]);
-  }
+  if (!IS_SPEC_OBJECT(obj)) return false;
   if (%_IsJSProxy(obj)) {
     return true;
   }