Parse eagerly inside block scopes.

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/accessors.h"
 #include "src/bootstrapper.h"
 #include "src/messages.h"
 #include "src/parser.h"
@@ skipping 716 matching lines @@
     if (scope->is_with_scope() && !found_non_trivial_declarations) return false;
     if (scope->is_block_scope() && !scope->decls_.is_empty()) return false;
     if (scope->is_declaration_scope() && scope->num_heap_slots() > 0) {
       found_non_trivial_declarations = true;
     }
   }
   return true;
 }
 
 
+bool Scope::AllowsLazyParsing() const {
+  // If we are inside a block scope, we must parse eagerly to find out how
+  // to allocate variables on the block scope. At this point, declarations may
+  // not have yet been parsed.
+  for (const Scope* scope = this; scope != NULL; scope = scope->outer_scope_) {
+    if (scope->is_block_scope()) return false;
+  }
+  return AllowsLazyCompilation();
+}
+
+
 bool Scope::AllowsLazyCompilation() const {
   return !force_eager_compilation_ && HasLazyCompilableOuterContext();
 }
 
 
 bool Scope::AllowsLazyCompilationWithoutContext() const {
   return !force_eager_compilation_ && HasTrivialOuterContext();
 }
 
 
@@ skipping 827 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 internal
 }  // namespace v8