importasyncioclassEvilLoop:defcall_soon(*args):# will crash before it actually gets hereprint(args)defget_debug(self):returnFalsedef__getattribute__(self,name):globaltrackerifname=="call_soon":fut.remove_done_callback(tracker)deltrackerprint("returning call_soon method after clearing callback0")returnobject.__getattribute__(self,name)classTrackDel:def__del__(self):print("deleted",self)fut=asyncio.Future(loop=EvilLoop())tracker=TrackDel()fut.add_done_callback(tracker)fut.set_result("kaboom")

deleted <__main__.TrackDel object at 0x7f4ab660a420>returning call_soon method after clearing callback0Python/context.c:534: _PyObject_GC_UNTRACK: Assertion "_PyObject_GC_IS_TRACKED(((PyObject*)(op)))" failed: object not tracked by the garbage collectorEnable tracemalloc to get the memory block allocation tracebackobject address  : 0x7f4ab64ca4b0object refcount : 0object type     : 0x9bfc60object type name: _contextvars.Contextobject repr     : <refcnt 0 at 0x7f4ab64ca4b0>Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailedPython runtime state: initializedTypeError: EvilLoop.call_soon() got an unexpected keyword argument 'context'