Do not expose termination exceptions to the Exception API.

src/json-stringifier.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_JSON_STRINGIFIER_H_
 #define V8_JSON_STRINGIFIER_H_
 
 #include "src/v8.h"
 
 #include "src/conversions.h"
@@ skipping 240 matching lines @@
 }
 
 
 MaybeHandle<Object> BasicJsonStringifier::Stringify(Handle<Object> object) {
   Result result = SerializeObject(object);
   if (result == UNCHANGED) return isolate_->factory()->undefined_value();
   if (result == SUCCESS) {
     ShrinkCurrentPart();
     Accumulate();
     if (overflowed_) {
-      return isolate_->Throw<Object>(
-          isolate_->factory()->NewInvalidStringLengthError());
+      THROW_NEW_ERROR(isolate_, NewInvalidStringLengthError(), Object);
     }
     return accumulator();
   }
   DCHECK(result == EXCEPTION);
   return MaybeHandle<Object>();
 }
 
 
 MaybeHandle<Object> BasicJsonStringifier::StringifyString(
     Isolate* isolate,  Handle<String> object) {
@@ skipping 92 matching lines @@
     return EXCEPTION;
   }
 
   int length = Smi::cast(stack_->length())->value();
   {
     DisallowHeapAllocation no_allocation;
     FixedArray* elements = FixedArray::cast(stack_->elements());
     for (int i = 0; i < length; i++) {
       if (elements->get(i) == *object) {
         AllowHeapAllocation allow_to_return_error;
-        isolate_->Throw(*factory_->NewTypeError(
-            "circular_structure", HandleVector<Object>(NULL, 0)));
+        Handle<Object> error;
+        MaybeHandle<Object> maybe_error = factory_->NewTypeError(
+            "circular_structure", HandleVector<Object>(NULL, 0));
+        if (maybe_error.ToHandle(&error)) isolate_->Throw(*error);
         return EXCEPTION;
       }
     }
   }
   JSArray::EnsureSize(stack_, length + 1);
   FixedArray::cast(stack_->elements())->set(length, *object);
   stack_->set_length(Smi::FromInt(length + 1));
   return SUCCESS;
 }
 
@@ skipping 482 matching lines @@
       SerializeString_<false, uint8_t>(object);
     } else {
       SerializeString_<false, uc16>(object);
     }
   }
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_STRINGIFIER_H_