Fix crash bug when loading const variable in the presence of eval....

src/codegen-arm.cc

 // Copyright 2006-2009 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 2428 matching lines @@
     } else if (slot->var()->mode() == Variable::DYNAMIC_LOCAL) {
       Slot* potential_slot = slot->var()->local_if_not_shadowed()->slot();
       // Only generate the fast case for locals that rewrite to slots.
       // This rules out argument loads.
       if (potential_slot != NULL) {
         __ ldr(r0,
                ContextSlotOperandCheckExtensions(potential_slot,
                                                  r1,
                                                  r2,
                                                  &slow));
+        if (potential_slot->var()->mode() == Variable::CONST) {
+          __ cmp(r0, Operand(Factory::the_hole_value()));
+          __ mov(r0, Operand(Factory::undefined_value()), LeaveCC, eq);
+        }
         // There is always control flow to slow from
         // ContextSlotOperandCheckExtensions.
         done.Jump();
       }
     }
 
     slow.Bind();
     frame_->EmitPush(cp);
     __ mov(r0, Operand(slot->var()->name()));
     frame_->EmitPush(r0);
@@ skipping 2730 matching lines @@
   __ mov(r2, Operand(0));
   __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION);
   __ Jump(Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)),
           RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal