Fix for issue 1007.

The Hydrogen environment only tracks values for stack-allocated variables.
It is a precondition of HEnvironment::Lookup(variable) that variable is
stack-allocated.  The check was missing at one call site.

Review URL: http://codereview.chromium.org/6034004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6094 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen.cc

@@ -4175,7 +4175,7 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
   if (args->length() != 2) return false;
 
   VariableProxy* arg_two = args->at(1)->AsVariableProxy();
-  if (arg_two == NULL) return false;
+  if (arg_two == NULL || !arg_two->var()->IsStackAllocated()) return false;
   HValue* arg_two_value = environment()->Lookup(arg_two->var());
   if (!arg_two_value->CheckFlag(HValue::kIsArguments)) return false;