edgedb-python test fails with uvloop 0.15.0

• EdgeDB Version: 1.0-alpha.8+dev.5432.g931252366.d20210212
• OS Version: macOS 11.2.1 / Darwin 20.3.0

This is reproducible without edgedb/uvloop using a Cython script, which illustrates how edgedb/uvloop 0.15 run:

import contextvars


cdef class P:
    cdef object t

    def __init__(self, t):
        self.t = t

    def run(self):
        self.t.clear()
        t = self.t  # segfault: self.t is NULL


cdef class T:
    cdef:
        object _p, _run

    def __init__(self):
        self._p = P(self)
        self._run = self._p.run

    def clear(self):
        self._p = None
        self._run = None


cdef main(T tt):
    ctx = contextvars.copy_context()
    ctx.run(tt._run)


if __name__ == '__main__':
    t = T()
    main(t)

[elprans]

Seems like asyncio in Python 3.11 has a similar issue? https://github.com/MagicStack/uvloop/runs/7822201198?check_suite_focus=true#step:7:768

[elprans]

@fantix, check upstream master branch/issues too. It is likely that they’ve fixed this already, just haven’t released.