Closed
Description
If we embed Python.Net into DotNet application, it crashes on Linux.
Crash occurs when application exits.
PythonEngine.Initialize();
try
{
using (Py.GIL())
{
dynamic sysModule = Py.Import("sys");
Console.WriteLine("Python engine version:");
Console.WriteLine(sysModule.version);
}
// This workaround reduces risk of Mono crash.
// Problem will be fixed in mono 4.6
if (Type.GetType("Mono.Runtime") != null)
{
Runtime.Py_Main(3, new[] { "/pcfgtest.exe", "-c", "exit" });
}
else
{
// Program will crash if we will try to do this under Windows.
//// Runtime.Py_Main(3, new[] { "/pcfgtest.exe", "-c", "exit" });
}
}
finally
{
PythonEngine.Shutdown();
}This is sample of code that produces crash.
Also it contains 'probably workaround".
Console output :
tux@pythonnet:/mnt/Projects/pythonnet/2/src/configtest/bin/Release$ mono pcfgtest.exe
Starting application...
Python.runtime.dll substituted by Python.Runtime-Py35-Linux64.dll.
Python engine version:
3.5.2 (default, Jul 5 2016, 12:43:10)
[GCC 5.4.0 20160609]
Shutting down finalizer thread timed out.
* Assertion at gc.c:867, condition `finalizer_thread_exited' not met
Stacktrace:
Native stacktrace:
mono() [0x4a77ca]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x113d0) [0x7f48084463d0]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38) [0x7f4807e8b418]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x16a) [0x7f4807e8d01a]
mono() [0x6408c9]
mono() [0x640ad7]
mono() [0x640c26]
mono() [0x5aee5e]
mono(mono_runtime_cleanup+0xe) [0x5a85de]
mono() [0x423cf7]
mono(mono_main+0x10d7) [0x47a087]
mono() [0x421818]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f4807e76830]
mono() [0x421c11]
Debug info from gdb:
=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
Aborted (core dumped)I tried everything - python 2.7, python 3.5, Mono 4.2, 4.4.
It does not matter, behavior always the same.
Also i tried to build with Py_DEBUG under linux (and pass python library from python3.5-dbg package)
I receive assertions on PythonEngine.Init:
- Decref -1 Assertions
- td_type != NULL Assertion
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