Issue with Trio and Nuitka

Nuitka appears to be incompatible with the latest version of Trio. As far as I can tell, this is unrelated to #410. This happens with all Trio programs I’ve tested, the simplest being:

import trio

async def main():
    print("Hello")

trio.run(main)

With Nuitka, this produces the traceback

  File "C:\Users\sethw\PycharmProjects\PyCom\venv\lib\site-packages\trio\_core\_run.py", line 1769, in run
    run_impl(runner, async_fn, args)
  File "C:\Users\sethw\PycharmProjects\PyCom\venv\lib\site-packages\trio\_core\_run.py", line 1803, in run_impl
    runner.init_task = runner.spawn_impl(
  File "C:\Users\sethw\PycharmProjects\PyCom\venv\lib\site-packages\trio\_core\_run.py", line 1351, in spawn_impl
    coro.cr_frame.f_locals.setdefault(
AttributeError: 'NoneType' object has no attribute 'f_locals'

I’ve tested this on Python 3.7 & 3.8 and the latest Nuitka from PyPi & an install from the factory branch, all of which produce the same traceback

[kayhayen]

I don’t have the time to focus on this right now unless somebody commercial needs it, this is not happening in the near future.

[JorjMcKie]

@kayhayen - I am not looking into this more closely.

The reason why this does not yet work is here:

def f(x):
    print(x)


async def make(f):
    return await f


af = make(f)

print("af.frame =", af.cr_frame)

Running this interpreted yields

af.frame = <frame at 0x00000241463E2A28, file 'test.py', line 5, code make>
sys:1: RuntimeWarning: coroutine 'make' was never awaited

Whereas in standalone we get:

af.frame = None

This makes trio fail.