chaverri commented on issue #2317:
URL: https://github.com/apache/fory/issues/2317#issuecomment-2956979796
Ok I was able to generate a payload and test and I'm getting this, I'm using
the version from main (0.11.0-SNAPSHOT)
```
java.lang.NullPointerException: Cannot invoke
"org.apache.fory.meta.ClassDef.getId()" because "classDef" is null
at
org.apache.fory.serializer.NonexistentClassSerializers$NonexistentClassSerializer.getClassFieldsInfo(NonexistentClassSerializers.java:160)
at
org.apache.fory.serializer.NonexistentClassSerializers$NonexistentClassSerializer.read(NonexistentClassSerializers.java:196)
at org.apache.fory.Fory.readDataInternal(Fory.java:1055)
at org.apache.fory.Fory.readNonRef(Fory.java:978)
at
org.apache.fory.serializer.SerializationBinding$JavaSerializationBinding.readContainerFieldValue(SerializationBinding.java:186)
at
org.apache.fory.serializer.AbstractObjectSerializer.readContainerFieldValue(AbstractObjectSerializer.java:164)
at
org.apache.fory.serializer.MetaSharedSerializer.read(MetaSharedSerializer.java:195)
at org.apache.fory.Fory.readDataInternal(Fory.java:1055)
at org.apache.fory.Fory.readRef(Fory.java:929)
at org.apache.fory.Fory.deserialize(Fory.java:883)
at org.apache.fory.Fory.deserialize(Fory.java:793)
```
And this is my config
```java
Fory.builder()
.deserializeNonexistentEnumValueAsNull(true)
.requireClassRegistration(false)
.withAsyncCompilation(true)
.withCompatibleMode(CompatibleMode.COMPATIBLE)
.withLanguage(Language.JAVA)
.build()
```
What I did was to serialize a dto-v2 instance, save the dump in hex,
deserialize it form the file to make sure it works (which it did) , I'm setting
the new field to a default value.
Then I'm downgrading to dto-v1 in the pom.xml of my project and try to
deserialize it , and that's where it fails
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