Not mask exception thrown by toString in String::UtfValue etc.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5482 matching lines @@
 }
 
 
 String::Utf8Value::Utf8Value(v8::Handle<v8::Value> obj)
     : str_(NULL), length_(0) {
   i::Isolate* isolate = i::Isolate::Current();
   if (IsDeadCheck(isolate, "v8::String::Utf8Value::Utf8Value()")) return;
   if (obj.IsEmpty()) return;
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
-  TryCatch try_catch;
   Handle<String> str = obj->ToString();
   if (str.IsEmpty()) return;
   i::Handle<i::String> i_str = Utils::OpenHandle(*str);
   length_ = i::Utf8Length(i_str);
   str_ = i::NewArray<char>(length_ + 1);
   str->WriteUtf8(str_);
 }
 
 
 String::Utf8Value::~Utf8Value() {
   i::DeleteArray(str_);
 }
 
 
 String::AsciiValue::AsciiValue(v8::Handle<v8::Value> obj)
     : str_(NULL), length_(0) {
   i::Isolate* isolate = i::Isolate::Current();
   if (IsDeadCheck(isolate, "v8::String::AsciiValue::AsciiValue()")) return;
   if (obj.IsEmpty()) return;
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
-  TryCatch try_catch;
   Handle<String> str = obj->ToString();
   if (str.IsEmpty()) return;
   length_ = str->Length();
   str_ = i::NewArray<char>(length_ + 1);
   str->WriteAscii(str_);
 }
 
 
 String::AsciiValue::~AsciiValue() {
   i::DeleteArray(str_);
 }
 
 
 String::Value::Value(v8::Handle<v8::Value> obj)
     : str_(NULL), length_(0) {
   i::Isolate* isolate = i::Isolate::Current();
   if (IsDeadCheck(isolate, "v8::String::Value::Value()")) return;
   if (obj.IsEmpty()) return;
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
-  TryCatch try_catch;
   Handle<String> str = obj->ToString();
   if (str.IsEmpty()) return;
   length_ = str->Length();
   str_ = i::NewArray<uint16_t>(length_ + 1);
   str->Write(str_);
 }
 
 
 String::Value::~Value() {
   i::DeleteArray(str_);
@@ skipping 1020 matching lines @@
 
   v->VisitPointers(blocks_.first(), first_block_limit_);
 
   for (int i = 1; i < blocks_.length(); i++) {
     v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
   }
 }
 
 
 } }  // namespace v8::internal