Program: 85111
Project: 85111
Buggy source:
private static Object getMethodParameterBean(Class<?> clazz,Method method,Object[] args){
  if (!hasConstraintParameter(method)) {
    return null;
  }
  try {
    String upperName=toUpperMethoName(method.getName());
    String parameterSimpleName=upperName + "String_Node_Str";
    String parameterClassName=clazz.getName() + "String_Node_Str" + parameterSimpleName;
    Class<?> parameterClass;
    try {
      parameterClass=(Class<?>)Class.forName(parameterClassName,true,clazz.getClassLoader());
    }
 catch (    ClassNotFoundException e) {
      ClassPool pool=ClassGenerator.getClassPool(clazz.getClassLoader());
      CtClass ctClass=pool.makeClass(parameterClassName);
      ClassFile classFile=ctClass.getClassFile();
      classFile.setVersionToJava5();
      ctClass.addConstructor(CtNewConstructor.defaultConstructor(pool.getCtClass(parameterClassName)));
      Class<?>[] parameterTypes=method.getParameterTypes();
      Annotation[][] parameterAnnotations=method.getParameterAnnotations();
      for (int i=0; i < parameterTypes.length; i++) {
        Class<?> type=parameterTypes[i];
        Annotation[] annotations=parameterAnnotations[i];
        AnnotationsAttribute attribute=new AnnotationsAttribute(classFile.getConstPool(),AnnotationsAttribute.visibleTag);
        for (        Annotation annotation : annotations) {
          if (annotation.annotationType().isAnnotationPresent(Constraint.class)) {
            javassist.bytecode.annotation.Annotation ja=new javassist.bytecode.annotation.Annotation(classFile.getConstPool(),pool.getCtClass(annotation.annotationType().getName()));
            Method[] members=annotation.annotationType().getMethods();
            for (            Method member : members) {
              if (Modifier.isPublic(member.getModifiers()) && member.getParameterTypes().length == 0 && member.getDeclaringClass() == annotation.annotationType()) {
                Object value=member.invoke(annotation,new Object[0]);
                if (value != null && !value.equals(member.getDefaultValue())) {
                  MemberValue memberValue=createMemberValue(classFile.getConstPool(),pool.get(member.getReturnType().getName()),value);
                  ja.addMemberValue(member.getName(),memberValue);
                }
              }
            }
            attribute.addAnnotation(ja);
          }
        }
        String fieldName=method.getName() + "String_Node_Str" + i;
        CtField ctField=CtField.make("String_Node_Str" + type.getCanonicalName() + "String_Node_Str"+ fieldName+ "String_Node_Str",pool.getCtClass(parameterClassName));
        ctField.getFieldInfo().addAttribute(attribute);
        ctClass.addField(ctField);
      }
      parameterClass=ctClass.toClass();
    }
    Object parameterBean=parameterClass.newInstance();
    for (int i=0; i < args.length; i++) {
      Field field=parameterClass.getField(method.getName() + "String_Node_Str" + i);
      field.set(parameterBean,args[i]);
    }
    return parameterBean;
  }
 catch (  Throwable e) {
    logger.warn(e.getMessage(),e);
    return null;
  }
}

Fixed version (ground truth):
private static Object getMethodParameterBean(Class<?> clazz,Method method,Object[] args){
  if (!hasConstraintParameter(method)) {
    return null;
  }
  try {
    String parameterClassName=generateMethodParameterClassName(clazz,method);
    Class<?> parameterClass;
    try {
      parameterClass=(Class<?>)Class.forName(parameterClassName,true,clazz.getClassLoader());
    }
 catch (    ClassNotFoundException e) {
      ClassPool pool=ClassGenerator.getClassPool(clazz.getClassLoader());
      CtClass ctClass=pool.makeClass(parameterClassName);
      ClassFile classFile=ctClass.getClassFile();
      classFile.setVersionToJava5();
      ctClass.addConstructor(CtNewConstructor.defaultConstructor(pool.getCtClass(parameterClassName)));
      Class<?>[] parameterTypes=method.getParameterTypes();
      Annotation[][] parameterAnnotations=method.getParameterAnnotations();
      for (int i=0; i < parameterTypes.length; i++) {
        Class<?> type=parameterTypes[i];
        Annotation[] annotations=parameterAnnotations[i];
        AnnotationsAttribute attribute=new AnnotationsAttribute(classFile.getConstPool(),AnnotationsAttribute.visibleTag);
        for (        Annotation annotation : annotations) {
          if (annotation.annotationType().isAnnotationPresent(Constraint.class)) {
            javassist.bytecode.annotation.Annotation ja=new javassist.bytecode.annotation.Annotation(classFile.getConstPool(),pool.getCtClass(annotation.annotationType().getName()));
            Method[] members=annotation.annotationType().getMethods();
            for (            Method member : members) {
              if (Modifier.isPublic(member.getModifiers()) && member.getParameterTypes().length == 0 && member.getDeclaringClass() == annotation.annotationType()) {
                Object value=member.invoke(annotation,new Object[0]);
                if (null != value) {
                  MemberValue memberValue=createMemberValue(classFile.getConstPool(),pool.get(member.getReturnType().getName()),value);
                  ja.addMemberValue(member.getName(),memberValue);
                }
              }
            }
            attribute.addAnnotation(ja);
          }
        }
        String fieldName=method.getName() + "String_Node_Str" + i;
        CtField ctField=CtField.make("String_Node_Str" + type.getCanonicalName() + "String_Node_Str"+ fieldName+ "String_Node_Str",pool.getCtClass(parameterClassName));
        ctField.getFieldInfo().addAttribute(attribute);
        ctClass.addField(ctField);
      }
      parameterClass=ctClass.toClass();
    }
    Object parameterBean=parameterClass.newInstance();
    for (int i=0; i < args.length; i++) {
      Field field=parameterClass.getField(method.getName() + "String_Node_Str" + i);
      field.set(parameterBean,args[i]);
    }
    return parameterBean;
  }
 catch (  Throwable e) {
    logger.warn(e.getMessage(),e);
    return null;
  }
}