René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Pythonnet crashes .Net application on exit.","articleBody":"If we embed Python.Net into DotNet application, it crashes on Linux.\r\nCrash occurs when application exits.\r\n\r\n``` C#\r\nPythonEngine.Initialize();\r\n\r\ntry\r\n{\r\n    using (Py.GIL())\r\n    {\r\n        dynamic sysModule = Py.Import(\"sys\");\r\n        Console.WriteLine(\"Python engine version:\");\r\n        Console.WriteLine(sysModule.version);\r\n    }\r\n\r\n    // This workaround reduces risk of Mono crash.\r\n    // Problem will be fixed in mono 4.6\r\n    if (Type.GetType(\"Mono.Runtime\") != null)\r\n    {\r\n        Runtime.Py_Main(3, new[] { \"/pcfgtest.exe\", \"-c\", \"exit\" });\r\n    }\r\n    else\r\n    {\r\n        // Program will crash if we will try to do this under Windows.\r\n        //// Runtime.Py_Main(3, new[] { \"/pcfgtest.exe\", \"-c\", \"exit\" });\r\n    }\r\n}\r\nfinally\r\n{\r\n    PythonEngine.Shutdown();\r\n}\r\n```\r\n\r\nThis is sample of code that produces crash.\r\nAlso it contains 'probably workaround\".\r\n## Console output :\r\n\r\n``` bash\r\ntux@pythonnet:/mnt/Projects/pythonnet/2/src/configtest/bin/Release$ mono pcfgtest.exe\r\nStarting application...\r\nPython.runtime.dll substituted by Python.Runtime-Py35-Linux64.dll.\r\nPython engine version:\r\n3.5.2 (default, Jul  5 2016, 12:43:10)\r\n[GCC 5.4.0 20160609]\r\nShutting down finalizer thread timed out.\r\n* Assertion at gc.c:867, condition `finalizer_thread_exited' not met\r\n\r\nStacktrace:\r\n\r\n\r\nNative stacktrace:\r\n\r\n        mono() [0x4a77ca]\r\n        /lib/x86_64-linux-gnu/libpthread.so.0(+0x113d0) [0x7f48084463d0]\r\n        /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38) [0x7f4807e8b418]\r\n        /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a) [0x7f4807e8d01a]\r\n        mono() [0x6408c9]\r\n        mono() [0x640ad7]\r\n        mono() [0x640c26]\r\n        mono() [0x5aee5e]\r\n        mono(mono_runtime_cleanup+0xe) [0x5a85de]\r\n        mono() [0x423cf7]\r\n        mono(mono_main+0x10d7) [0x47a087]\r\n        mono() [0x421818]\r\n        /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f4807e76830]\r\n        mono() [0x421c11]\r\n\r\nDebug info from gdb:\r\n\r\n\r\n=================================================================\r\nGot a SIGABRT while executing native code. This usually indicates\r\na fatal error in the mono runtime or one of the native libraries\r\nused by your application.\r\n=================================================================\r\n\r\nAborted (core dumped)\r\n```\r\n\r\nI tried everything - python 2.7, python 3.5, Mono 4.2, 4.4.\r\nIt does not matter, behavior always the same.\r\n\r\nAlso i tried to build with Py_DEBUG under linux (and pass python library from python3.5-dbg package) \r\nI receive assertions on PythonEngine.Init:\r\n1) Decref -1  Assertions\r\n2) td_type != NULL Assertion \r\n","author":{"url":"https://github.com/dmitriyse","@type":"Person","name":"dmitriyse"},"datePublished":"2016-07-22T12:23:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":23},"url":"https://github.com/245/pythonnet/issues/245"}