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gh-125017: Fix crash on premature access to classmethod/staticmethod annotations - #125636
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ZeroIntensity
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Oct 17, 2024
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Is there any backport needed here? I'm not sure if the original PR made it in 3.13 |
JelleZijlstra
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Oct 17, 2024
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No, this is a PEP 649 change and is only on main. |
zware
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Oct 17, 2024
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Heads-up: this appears to have caused some refleak buildbot failures, see for example https://buildbot.python.org/#/builders/1613/builds/116 |
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ZeroIntensity
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Oct 17, 2024
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Actually, on a second look, this part is technically unsafe: else {
Py_DECREF(dict);
returnPyDict_SetItem(dict, name, value);
}If the dictionary's reference count is 1, then this will result in a use-after-free. Though, I guess that's never possible because the dictionary will be stored on the instance as well. In hindsight, there should have either been an assertion (or just not do it in the first place), but oh well. |
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cls.__dict__['__new__'].__annotations__#125017