urlyy commented on issue #3049:
URL: https://github.com/apache/fory/issues/3049#issuecomment-3657042970

   I've identified a small, reproducible example that helps localize the 
problem. We will handle this as soon as possible.
   ```rust
   #[test]
   fn test_field_info(){
       // my_vec: Vec<Wrapper<Another>>
       let field = FieldInfo {
           field_id: 0,
           field_name: "my_vec".to_string(),
           field_type: FieldType {
               // Vec
               type_id: 21,
               nullable: true,
               generics: vec![
                   FieldType {
                       // Wrapper(struct)
                       type_id: 787,
                       nullable: true,
                       generics: vec![
                           FieldType {
                               // Another(struct)
                               type_id: 528,
                               nullable: true,
                               generics: vec![],
                           }
                       ],
                   }
               ],
           },
       };
       let bytes = field.to_bytes().unwrap();
       let new_field = FieldInfo::from_bytes(&mut 
Reader::new(bytes.as_slice())).unwrap();
   
       // an unexpected result, but equal to actual result
       let field_info_without_another = FieldInfo {
           // here changes too!!!!
           field_id: -1,
           field_name: "my_vec".to_string(),
           field_type: FieldType {
               // Vec
               type_id: 21,
               nullable: true,
               generics: vec![
                   FieldType {
                       // Wrapper(struct)
                       type_id: 787,
                       nullable: true,
                       generics: vec![
                           // FieldType {
                           //     // Another(struct)
                           //     type_id: 528,
                           //     nullable: true,
                           //     generics: vec![],
                           // }
                       ],
                   }
               ],
           },
       };
       assert_eq!(
           new_field,
           field_info_without_another
       )
   }
   ```


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