[3.13] gh-126080: fix UAF on task->task_context
in task_call_step_soon
due to an evil loop.__getattribute__
(GH-126120)
#126250
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(cherry picked from commit 0e86655)
Co-authored-by: Bénédikt Tran [email protected]
task_call_step_soon
in_asynciomodule.c
(with admittedly ridiculous setup) #126080