content: package com.alibaba.json.bvt.issue_3300;
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.parser.ParserConfig;
  import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
  import com.alibaba.fastjson.util.IdentityHashMap;
  import com.alibaba.fastjson.util.ParameterizedTypeImpl;
  import junit.framework.TestCase;
  import java.util.List;
  
  import java.lang.reflect.Type;
  
  public class Issue3329 extends TestCase {
      public void test_for_issue() throws Exception {
          ParserConfig config = new ParserConfig();
          IdentityHashMap<Type, ObjectDeserializer> deserializers = config.getDeserializers();
          int initSize = deserializers.size();
          for (int i = 0; i < 1000 * 10; ++i) {
              assertEquals(123,
                  ((VO<User>) JSON.parseObject("{\"value\":{\"id\":123}}",
                          new ParameterizedTypeImpl(new Type[] {User.class}, null, VO.class),
                          config
                          )).value.id
              );
          }
  
  
          assertEquals(2, deserializers.size() - initSize);
      }
  
      public static class VO<T> {
          public T value;
      }
  
      public static class User {
          public int id;
      }
  }
  