GH-97592: Fix crash in C remove_done_callback due to evil code (GH-97660)

Evil code could cause fut_callbacks to be cleared when PyObject_RichCompareBool is called.
(cherry picked from commit 63780f4599acc2c5ee8af5f37ab76c162ad21065)

Co-authored-by: Guido van Rossum <guido@python.org>

Miss Islington (bot) committed 3y ago

3124618fd5be9c00b1521c8a980f6aea02dc1a48

Parent: cdc01ea

Committed by GitHub <noreply@github.com> on 9/30/2022, 8:22:48 PM