Reporting -1 as the size of an ILLEGAL reference which actually has...

src/codegen-arm.cc

 // Copyright 2006-2008 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 551 matching lines @@
     Load(e);
     __ CallRuntime(Runtime::kThrowReferenceError, 1);
   }
 }
 
 
 void CodeGenerator::UnloadReference(Reference* ref) {
   // Pop a reference from the stack while preserving TOS.
   Comment cmnt(masm_, "[ UnloadReference");
   int size = ref->size();
-  if (size <= 0) {
-    // Do nothing. No popping is necessary.
-  } else {
+  if (size > 0) {
     frame_->Pop(r0);
     frame_->Drop(size);
     frame_->Push(r0);
   }
 }
 
 
 // ECMA-262, section 9.2, page 30: ToBoolean(). Convert the given
 // register to a boolean in the condition code register. The code
 // may jump to 'false_target' in case the register converts to 'false'.
@@ skipping 3692 matching lines @@
   // Slow-case: Non-function called.
   __ bind(&slow);
   __ mov(r0, Operand(argc_));  // Setup the number of arguments.
   __ InvokeBuiltin(Builtins::CALL_NON_FUNCTION, JUMP_JS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal