Do not expose termination exceptions to the Exception API.

src/scopes.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/scopes.h"
 
 #include "src/accessors.h"
 #include "src/bootstrapper.h"
@@ skipping 1062 matching lines @@
   if (proxy->is_assigned()) var->set_maybe_assigned();
 
   if (FLAG_harmony_scoping && strict_mode() == STRICT &&
       var->is_const_mode() && proxy->is_assigned()) {
     // Assignment to const. Throw a syntax error.
     MessageLocation location(
         info->script(), proxy->position(), proxy->position());
     Isolate* isolate = info->isolate();
     Factory* factory = isolate->factory();
     Handle<JSArray> array = factory->NewJSArray(0);
-    Handle<Object> result =
+    Handle<Object> error;
+    MaybeHandle<Object> maybe_error =
         factory->NewSyntaxError("harmony_const_assign", array);
-    isolate->Throw(*result, &location);
+    if (maybe_error.ToHandle(&error)) isolate->Throw(*error, &location);
     return false;
   }
 
   if (FLAG_harmony_modules) {
     bool ok;
 #ifdef DEBUG
     if (FLAG_print_interface_details) {
       PrintF("# Resolve %.*s:\n", var->raw_name()->length(),
              var->raw_name()->raw_data());
     }
@@ skipping 11 matching lines @@
 #endif
 
       // Inconsistent use of module. Throw a syntax error.
       // TODO(rossberg): generate more helpful error message.
       MessageLocation location(
           info->script(), proxy->position(), proxy->position());
       Isolate* isolate = info->isolate();
       Factory* factory = isolate->factory();
       Handle<JSArray> array = factory->NewJSArray(1);
       JSObject::SetElement(array, 0, var->name(), NONE, STRICT).Assert();
-      Handle<Object> result =
+      Handle<Object> error;
+      MaybeHandle<Object> maybe_error =
           factory->NewSyntaxError("module_type_error", array);
-      isolate->Throw(*result, &location);
+      if (maybe_error.ToHandle(&error)) isolate->Throw(*error, &location);
       return false;
     }
   }
 
   proxy->BindTo(var);
 
   return true;
 }
 
 
@@ skipping 263 matching lines @@
 }
 
 
 int Scope::ContextLocalCount() const {
   if (num_heap_slots() == 0) return 0;
   return num_heap_slots() - Context::MIN_CONTEXT_SLOTS -
       (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0);
 }
 
 } }  // namespace v8::internal