Description
Environment
- Pythonnet version: current master (with soft reload).
This is in context of Unity Editor.
Details
- Use the soft-reload branch of pythonnet within Unity.
- Create an asmdef called MyAssembly in Unity.
- In the same folder, create a file Foo.cs
namespace Foo
{
public class Bar
{
public static void Quux() { UnityEngine.Debug.Log("quux"); }
}
}
- In the Unity Python console:
import clr
clr.AddReference("MyAssembly")
import Foo
Foo.Bar.Quux()
- This will print
quuxin the Unity console. - In Unity, modify Foo.cs e.g. add a space in it.
- Allow Unity to reload the domain.
- This works!
- In Unity, modify Foo.cs and rename Quux to Quux2.
Expected: Python for .NET is available after reload. Running Python code again will raise AttributeError.
Actual: Python for .NET throws SerializationException: Cannot get the member 'Quux'. I can't even run the Python code again; it fails on import clr. I must restart Unity.
Similarly if I rename the class, the namespace, or the assembly.
The problem appears to be in ManagedType subclasses. These are [Serializable] but they point to things like Type whose deserialization may fail, destroying everything.
I'm working on a proof of concept so that we control the deserialization and we can replace the failed deserialize with a dummy or a null, which only fails if this eventually gets used. I'll post results tomorrow hopefully on a first attempt.