Implement rudimentary module linking.

src/scopeinfo.cc

 // Copyright 2011 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 124 matching lines @@
     ASSERT(function_name_info != STACK ||
            (var_index == scope_info->StackLocalCount() &&
             var_index == scope_info->StackSlotCount() - 1));
     ASSERT(function_name_info != CONTEXT ||
            var_index == scope_info->ContextLength() - 1);
   }
 
   ASSERT(index == scope_info->length());
   ASSERT(scope->num_parameters() == scope_info->ParameterCount());
   ASSERT(scope->num_stack_slots() == scope_info->StackSlotCount());
-  ASSERT(scope->num_heap_slots() == scope_info->ContextLength());
+  ASSERT(scope->num_heap_slots() == scope_info->ContextLength() ||
+         (scope->num_heap_slots() == kVariablePartIndex &&
+          scope_info->ContextLength() == 0));
   return scope_info;
 }
 
 
 ScopeInfo* ScopeInfo::Empty() {
   return reinterpret_cast<ScopeInfo*>(HEAP->empty_fixed_array());
 }
 
 
 ScopeType ScopeInfo::Type() {
@@ skipping 343 matching lines @@
             Context::MIN_CONTEXT_SLOTS,
             ContextLocalNameEntriesIndex(),
             ContextLocalNameEntriesIndex() + ContextLocalCount(),
             this);
 
   PrintF("}\n");
 }
 #endif  // DEBUG
 
 } }  // namespace v8::internal