Chain ScopeInfos together

src/contexts.cc

 // Copyright 2011 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/contexts.h"
 
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
 
@@ skipping 92 matching lines @@
 
 JSReceiver* Context::extension_receiver() {
   DCHECK(IsNativeContext() || IsWithContext() ||
          IsFunctionContext() || IsBlockContext());
   return IsWithContext() ? JSReceiver::cast(
                                ContextExtension::cast(extension())->extension())
                          : extension_object();
 }
 
 ScopeInfo* Context::scope_info() {
-  DCHECK(IsModuleContext() || IsScriptContext() || IsBlockContext() ||
-         IsCatchContext() || IsWithContext() || IsDebugEvaluateContext());
+  DCHECK(!IsNativeContext());
+  if (IsFunctionContext() || IsModuleContext()) {
+    return closure()->shared()->scope_info();
+  }
   HeapObject* object = extension();
   if (object->IsContextExtension()) {
     DCHECK(IsBlockContext() || IsCatchContext() || IsWithContext() ||
            IsDebugEvaluateContext());
     object = ContextExtension::cast(object)->scope_info();
   }
   return ScopeInfo::cast(object);
 }
 
 
@@ skipping 435 matching lines @@
 
   int previous_value = errors_thrown()->value();
   set_errors_thrown(Smi::FromInt(previous_value + 1));
 }
 
 
 int Context::GetErrorsThrown() { return errors_thrown()->value(); }
 
 }  // namespace internal
 }  // namespace v8