[3.12] [3.13] GH-125789: fix fut._callbacks to always return a copy of callbacks (GH-125922) (GH-125976)#125977
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GH-125789: fix
fut._callbacksto always return a copy of callbacks (GH-125922)Fix
asyncio.Future._callbacksto always return a copy of the internal list of callbacks to avoid mutation from user code affecting the internal state.(cherry picked from commit f54e1a2)
Co-authored-by: Kumar Aditya kumaraditya@python.org
(cherry picked from commit cae853e)