Environment

• Pythonnet version: 3.0.0 preview
• Python version: 3.8 win32
• Operating System: Windows
• .NET Runtime: .NET 5

Summary

If there is a callback from .NET to Python, and the Python code raises a .NET type exception, instead of the corresponding real .NET exception was rethrown on the .NET side (after marshalling), alwaysPython.Runtime.PythonException is thrown.

Details

.NET snippet

classFoo{publicstaticvoidBar(Actionaction){try{action.Invoke();Console.WriteLine("No exception.");}catch(NullReferenceException){Console.WriteLine("Null reference caught.");}catch(Exceptionex){Console.WriteLine("General exception caught: "+ex.GetType().Type);}}}

Python snippet

# .NET importsfromSystemimportNullReferenceException,ActionfromMyProgramimportFoo# Preparationdefcall():raiseNullReferenceException()action=Action(call)# ActionFoo.Bar(action)

Expected output:
Null reference caught.

Actual output:
General exception caught: Python.Runtime.PythonException