[BUG]: `test_can_cancel_coroutine_from_python` passes but segfaults on test cleanup

[dagardner-nv]

Version

25.10

Which installation method(s) does this occur on?

Source

Describe the bug.

Test passes but segfaults soon after:

#0  x86_64_fallback_frame_state (context=0x7ffcc1350520, fs=0x7ffcc1350610) at ./md-unwind-support.h:57
#1  uw_frame_state_for (context=context@entry=0x7ffcc1350520, fs=fs@entry=0x7ffcc1350610) at ../../../libgcc/unwind-dw2.c:1016
#2  0x00007ff5f8bfdc12 in _Unwind_Backtrace (trace=0x7ff5faa5c920 <backtrace_helper>, trace_argument=0x7ffcc1350750) at ../../../libgcc/unwind.inc:303
#3  0x00007ff5faa5ca0f in __GI___backtrace (array=<optimized out>, size=64) at ./debug/backtrace.c:78
#4  0x00007ff5f8a8f929 in google::glog_internal_namespace_::GetStackTrace(void**, int, int) () from conda/envs/mrc/lib/libglog.so.2
#5  0x00007ff5f8a8f00a in google::(anonymous namespace)::HandleSignal(int, siginfo*, void*) () from conda/envs/mrc/lib/libglog.so.2
#6  0x00007ff5fa9d5057 in __pthread_once_slow (once_control=0x7ff5f8aaf7c4 <google::(anonymous namespace)::signaled>, 
    init_routine=0x7ff5f70edf30 <std::__once_proxy()>) at ./nptl/pthread_once.c:116
#7  0x00007ff5f8a8e917 in google::(anonymous namespace)::FailureSignalHandler(int, siginfo*, void*) () from conda/envs/mrc/lib/libglog.so.2
#8  <signal handler called>
#9  0x00005634d322c434 in ?? ()
#10 0x00007ff5f2f3b173 in std::__n4861::coroutine_handle<void>::resume (this=0x5631b03a4fe0)
    at conda/envs/mrc/x86_64-conda-linux-gnu/include/c++/12.1.0/coroutine:135
#11 0x00007ff5f2f4d435 in mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}::operator()(pybind11::object) const (__closure=0x5631b03a4fd8, future=...) at mrc/python/mrc/_pymrc/include/pymrc/coro.hpp:216
#12 0x00007ff5f2f66b28 in pybind11::detail::argument_loader<pybind11::object>::call_impl<void, mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}&, 0ul, pybind11::detail::void_type>(mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}&, std::integer_sequence<unsigned long, 0ul>, pybind11::detail::void_type&&) && (this=0x7ffcc13515e0, f=...)
    at mrc/.cache/cpm/pybind11/168c534677bf3cfcf18f57381c9b8c9dece5e940/include/pybind11/cast.h:1613
#13 0x00007ff5f2f6119e in pybind11::detail::argument_loader<pybind11::object>::call<void, pybind11::detail::void_type, mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}&>(mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}&) && (this=0x7ffcc13515e0, f=...)
    at mrc/.cache/cpm/pybind11/168c534677bf3cfcf18f57381c9b8c9dece5e940/include/pybind11/cast.h:1587
#14 0x00007ff5f2f5b7f9 in pybind11::cpp_function::initialize<mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}, void, pybind11::object>(mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}&&, void (*)(pybind11::object))::{lambda(pybind11::detail::function_call&)#3}::operator()(pybind11::detail::function_call&) const (__closure=0x0, call=...)
    at mrc/.cache/cpm/pybind11/168c534677bf3cfcf18f57381c9b8c9dece5e940/include/pybind11/pybind11.h:297
#15 0x00007ff5f2f5b8c6 in pybind11::cpp_function::initialize<mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}, void, pybind11::object>(mrc::pymrc::coro::PyTaskToCppAwaitable::await_suspend(std::__n4861::coroutine_handle<void>)::{lambda(pybind11::object)#1}&&, void (*)(pybind11::object))::{lambda(pybind11::detail::function_call&)#3}::_FUN(pybind11::detail::function_call&) ()
    at mrc/.cache/cpm/pybind11/168c534677bf3cfcf18f57381c9b8c9dece5e940/include/pybind11/pybind11.h:267
#16 0x00007ff5f2f4aecb in pybind11::cpp_function::dispatcher (self=<PyCapsule at remote 0x7ff5f3274780>, args_in=(<_asyncio.Task at remote 0x7ff5f8b3bdc0>,), 

Minimum reproducible example

pytest  -v python/tests/test_coro.py::test_can_cancel_coroutine_from_python


python/tests/test_coro.py::test_can_cancel_coroutine_from_python PASSED                                                                                     [100%]Segmentation fault (core dumped)

Relevant log output

Full env printout

Other/Misc.

No response

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