Program: 53625
Project: 53625
Buggy source:
@Test public void addTraceValue() throws Exception {
  final TestClassLoader loader=getTestClassLoader();
  final String javassistClassName="String_Node_Str";
  loader.addTransformer(javassistClassName,new TransformCallback(){
    @Override public byte[] doInTransform(    Instrumentor instrumentor,    ClassLoader loader,    String className,    Class<?> classBeingRedefined,    ProtectionDomain protectionDomain,    byte[] classfileBuffer) throws InstrumentException {
      try {
        logger.info("String_Node_Str",loader);
        InstrumentClass aClass=instrumentor.getInstrumentClass(loader,javassistClassName,classfileBuffer);
        aClass.addField(ObjectTraceValue.class.getName());
        aClass.addField(IntTraceValue.class.getName());
        aClass.addField(DatabaseInfoTraceValue.class.getName());
        aClass.addField(BindValueTraceValue.class.getName());
        String methodName="String_Node_Str";
        aClass.getDeclaredMethod(methodName).addInterceptor("String_Node_Str");
        return aClass.toBytecode();
      }
 catch (      InstrumentException e) {
        e.printStackTrace();
        throw new RuntimeException(e.getMessage(),e);
      }
    }
  }
);
  loader.initialize();
  Class<?> testObjectClazz=loader.loadClass(javassistClassName);
  final String methodName="String_Node_Str";
  logger.info("String_Node_Str",testObjectClazz.toString());
  final Object testObject=testObjectClazz.newInstance();
  Method callA=testObjectClazz.getMethod(methodName);
  callA.invoke(testObject);
  Class<?> objectTraceValue=loader.loadClass(ObjectTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",objectTraceValue.isInstance(testObject));
  objectTraceValue.getMethod("String_Node_Str",Object.class).invoke(testObject,"String_Node_Str");
  Object get=objectTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertEquals("String_Node_Str",get);
  Class<?> intTraceValue=loader.loadClass(IntTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",intTraceValue.isInstance(testObject));
  intTraceValue.getMethod("String_Node_Str",int.class).invoke(testObject,1);
  int a=(Integer)intTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertEquals(1,a);
  Class<?> databaseTraceValue=loader.loadClass(DatabaseInfoTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",databaseTraceValue.isInstance(testObject));
  databaseTraceValue.getMethod("String_Node_Str",DatabaseInfo.class).invoke(testObject,UnKnownDatabaseInfo.INSTANCE);
  Object databaseInfo=databaseTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertSame(UnKnownDatabaseInfo.INSTANCE,databaseInfo);
}

Fixed version (ground truth):
@Test public void addTraceValue() throws Exception {
  final TestClassLoader loader=getTestClassLoader();
  final String javassistClassName="String_Node_Str";
  loader.addTransformer(javassistClassName,new TransformCallback(){
    @Override public byte[] doInTransform(    Instrumentor instrumentor,    ClassLoader loader,    String className,    Class<?> classBeingRedefined,    ProtectionDomain protectionDomain,    byte[] classfileBuffer) throws InstrumentException {
      try {
        logger.info("String_Node_Str",loader);
        InstrumentClass aClass=instrumentor.getInstrumentClass(loader,javassistClassName,classfileBuffer);
        aClass.addField(ObjectTraceValue.class.getName());
        aClass.addField(IntTraceValue.class.getName());
        aClass.addField(IntArrayTraceValue.class.getName());
        aClass.addField(IntegerArrayTraceValue.class.getName());
        aClass.addField(DatabaseInfoTraceValue.class.getName());
        aClass.addField(BindValueTraceValue.class.getName());
        String methodName="String_Node_Str";
        aClass.getDeclaredMethod(methodName).addInterceptor("String_Node_Str");
        return aClass.toBytecode();
      }
 catch (      InstrumentException e) {
        e.printStackTrace();
        throw new RuntimeException(e.getMessage(),e);
      }
    }
  }
);
  loader.initialize();
  Class<?> testObjectClazz=loader.loadClass(javassistClassName);
  final String methodName="String_Node_Str";
  logger.info("String_Node_Str",testObjectClazz.toString());
  final Object testObject=testObjectClazz.newInstance();
  Method callA=testObjectClazz.getMethod(methodName);
  callA.invoke(testObject);
  Class<?> objectTraceValue=loader.loadClass(ObjectTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",objectTraceValue.isInstance(testObject));
  objectTraceValue.getMethod("String_Node_Str",Object.class).invoke(testObject,"String_Node_Str");
  Object get=objectTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertEquals("String_Node_Str",get);
  Class<?> intTraceValue=loader.loadClass(IntTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",intTraceValue.isInstance(testObject));
  intTraceValue.getMethod("String_Node_Str",int.class).invoke(testObject,1);
  int a=(Integer)intTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertEquals(1,a);
  Class<?> intArrayTraceValue=loader.loadClass(IntArrayTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",intArrayTraceValue.isInstance(testObject));
  int[] expectedInts={1,2,3};
  intArrayTraceValue.getMethod("String_Node_Str",int[].class).invoke(testObject,expectedInts);
  int[] ints=(int[])intArrayTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertEquals(expectedInts,ints);
  Class<?> integerArrayTraceValue=loader.loadClass(IntegerArrayTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",integerArrayTraceValue.isInstance(testObject));
  Integer[] expectedIntegers={1,2};
  Object[] wrappedExpectedIntegers=new Object[]{expectedIntegers};
  integerArrayTraceValue.getMethod("String_Node_Str",Integer[].class).invoke(testObject,wrappedExpectedIntegers);
  Integer[] integers=(Integer[])integerArrayTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertArrayEquals(expectedIntegers,integers);
  Class<?> databaseTraceValue=loader.loadClass(DatabaseInfoTraceValue.class.getName());
  Assert.assertTrue("String_Node_Str",databaseTraceValue.isInstance(testObject));
  databaseTraceValue.getMethod("String_Node_Str",DatabaseInfo.class).invoke(testObject,UnKnownDatabaseInfo.INSTANCE);
  Object databaseInfo=databaseTraceValue.getMethod("String_Node_Str").invoke(testObject);
  Assert.assertSame(UnKnownDatabaseInfo.INSTANCE,databaseInfo);
}