OLD type

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 125ec58c6920a1e6645b575c61225ff7d31cb980..d8b668e19ec604bcdf7f38e90a17d5455fb46dac 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -2313,7 +2313,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
           Add<HEnvironmentMarker>(HEnvironmentMarker::BIND, index);
       USE(bind);
 #ifdef DEBUG
-      bind->set_closure(env->closure());
+      if (!env->closure().is_null()) bind->set_closure(env->closure());
 #endif
     }
   }
@@ -2326,7 +2326,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
           Add<HEnvironmentMarker>(HEnvironmentMarker::LOOKUP, index);
       USE(lookup);
 #ifdef DEBUG
-      lookup->set_closure(env->closure());
+      if (!env->closure().is_null()) lookup->set_closure(env->closure());
 #endif
     }
     return value;