JIT

gh-131998: Fix `NULL` dereference when using an unbound method descriptor in a specialized code path #3118

Job	Run time
Interpreter (Debug)	8m 55s
Free-Threaded (Debug) (19)	13m 36s
i686-pc-windows-msvc/msvc (Debug)	19m 5s
i686-pc-windows-msvc/msvc (Release)	11m 37s
x86_64-pc-windows-msvc/msvc (Debug)	20m 55s
x86_64-pc-windows-msvc/msvc (Release)	13m 12s
aarch64-pc-windows-msvc/msvc (Debug)	18m 5s
aarch64-pc-windows-msvc/msvc (Release)	14m 50s
x86_64-apple-darwin/clang (Debug)	14m 51s
x86_64-apple-darwin/clang (Release)	9m 32s
aarch64-apple-darwin/clang (Debug)	11m 3s
aarch64-apple-darwin/clang (Release)	8m 4s
x86_64-unknown-linux-gnu/gcc (Debug)	9m 59s
x86_64-unknown-linux-gnu/gcc (Release)	6m 16s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 28s
aarch64-unknown-linux-gnu/gcc (Release)	7m 17s
	3h 14m 45s

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