Strict mode arguments do not share binding with formal parameters.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 6bd1a6b0e05bfb77c838507703d9bb08fec01f7f..91cb7dd07d0577907b5d212b186acde611dd7dd3 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -2235,6 +2235,7 @@ void HGraphBuilder::SetupScope(Scope* scope) {
   // not have declarations).
   if (scope->arguments() != NULL) {
     if (!scope->arguments()->IsStackAllocated() ||
+        scope->arguments_shadow() != NULL &&

[Kevin Millikin (Chromium), 2011/03/07 11:46:48]

Parens around the && please.

[Martin Maly, 2011/03/07 19:09:40]

Done.

         !scope->arguments_shadow()->IsStackAllocated()) {
       BAILOUT("context-allocated arguments");
     }
@@ -2242,7 +2243,9 @@ void HGraphBuilder::SetupScope(Scope* scope) {
     AddInstruction(object);
     graph()->SetArgumentsObject(object);
     environment()->Bind(scope->arguments(), object);
-    environment()->Bind(scope->arguments_shadow(), object);
+    if (scope->arguments_shadow() != NULL) {
+      environment()->Bind(scope->arguments_shadow(), object);
+    }
   }
 }