Temporary change to try to catch missing pregenerated stubs early with

src/code-stubs.h

 // Copyright 2011 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 121 matching lines @@
   static Major GetMajorKey(Code* code_stub) {
     return static_cast<Major>(code_stub->major_key());
   }
 
   static const char* MajorName(Major major_key, bool allow_unknown_keys);
 
   virtual ~CodeStub() {}
 
   bool CompilingCallsToThisStubIsGCSafe() {
     bool is_pregenerated = IsPregenerated();
-#ifdef DEBUG
     Code* code = NULL;
-    ASSERT(!is_pregenerated || FindCodeInCache(&code));
-#endif
+    CHECK(!is_pregenerated || FindCodeInCache(&code));
     return is_pregenerated;
   }
 
   // See comment above, where Instanceof is defined.
   virtual bool IsPregenerated() { return false; }
 
   static void GenerateStubsAheadOfTime();
   static void GenerateFPStubs();
 
   // Some stubs put untagged junk on the stack that cannot be scanned by the
@@ skipping 850 matching lines @@
                     bool result);
   void GenerateTypeTransition(MacroAssembler* masm);
 
   Register tos_;
   Types types_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_