JIT

gh-131998: Fix `NULL` dereference when using an unbound method descriptor in a specialized code path #3079

Job	Run time
Interpreter (Debug)	9m 2s
Free-Threaded (Debug) (19)	14m 27s
i686-pc-windows-msvc/msvc (Debug)	20m 40s
i686-pc-windows-msvc/msvc (Release)	12m 15s
x86_64-pc-windows-msvc/msvc (Debug)	20m 0s
x86_64-pc-windows-msvc/msvc (Release)	12m 12s
aarch64-pc-windows-msvc/msvc (Debug)	4m 18s
aarch64-pc-windows-msvc/msvc (Release)	6m 42s
x86_64-apple-darwin/clang (Debug)	18m 9s
x86_64-apple-darwin/clang (Release)	11m 45s
aarch64-apple-darwin/clang (Debug)	9m 30s
aarch64-apple-darwin/clang (Release)	8m 4s
x86_64-unknown-linux-gnu/gcc (Debug)	9m 54s
x86_64-unknown-linux-gnu/gcc (Release)	6m 6s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 20s
aarch64-unknown-linux-gnu/gcc (Release)	5m 38s
	2h 56m 2s

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