Make sure to check that the function prototype is a ...

src/stub-cache-ia32.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 214 matching lines @@
   __ shl(eax, kSmiTagSize);
   __ ret(0);
 }
 
 
 void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm,
                                                  Register receiver,
                                                  Register scratch1,
                                                  Register scratch2,
                                                  Label* miss_label) {
-
   __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
   __ mov(eax, Operand(scratch1));
   __ ret(0);
 }
 
 
 void StubCompiler::GenerateLoadField(MacroAssembler* masm,
                                      JSObject* object,
                                      JSObject* holder,
                                      Register receiver,
@@ skipping 966 matching lines @@
   GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
 
   // Return the generated code.
   return GetCode(CALLBACKS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal