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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Multiple assertion failures for Python classes derived from System.Exception in debug builds","articleBody":"### Environment\r\n\r\n-   Pythonnet version: 2.5.1\r\n-   Python version: 3.8\r\n-   Operating System: Win 10 64\r\n\r\n### Details\r\n\r\nIn debug build (`DebugWinPY3`) this test:\r\nhttps://github.com/pythonnet/pythonnet/blob/61d1b7c22eb7cd68f991d35fcafbdf4dd90b7b19/src/tests/test_constructors.py#L41\r\n\r\nfails this assertion:\r\nhttps://github.com/pythonnet/pythonnet/blob/61d1b7c22eb7cd68f991d35fcafbdf4dd90b7b19/src/runtime/interop.cs#L92\r\n\r\nPython type object for `Sub` class gets an unknown extra field of size `IntPtr.Size`, causing it to be larger than its base type object (reflected) `System.Exception`.\r\n\r\nSee also https://github.com/pythonnet/pythonnet/pull/1196#issuecomment-690750845 for previous discussion.\r\n\r\n@koubaa @amos402 ","author":{"url":"https://github.com/lostmsu","@type":"Person","name":"lostmsu"},"datePublished":"2020-09-11T03:24:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/1218/pythonnet/issues/1218"}