UUM-155957

Known issue in 6000.6.8f1

Mentioned in 6 release notes.

Listed as a known issue in 6000.6.8f1 (Nov 3, 2026); no fix in indexed releases yet.

Open on Unity Issue Tracker
VersionSectionRiskImpactNote
6000.6.8f1Known Issues
Serialization
BlockerKnown issueCrash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct<T>
6000.7.0b7Known Issues
Serialization
BlockerKnown issueCrash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct<T>
6000.6.7f1Known Issues
Serialization
BlockerKnown issueCrash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct<T>
6000.7.0b6Known Issues
Serialization
BlockerKnown issueCrash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct<T>
6000.6.6f1Known IssuesBlockerKnown issue6000.6.0a7: Crash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct<T>
6000.7.0b5Known IssuesBlockerKnown issue6000.6.0a7: Crash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct<T>

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