JIT

gh-131998: Fix `NULL` dereference when using an unbound method descriptor in a specialized code path #3125

Job	Run time
Interpreter (Debug)	9m 15s
Free-Threaded (Debug) (19)	14m 1s
i686-pc-windows-msvc/msvc (Debug)	13m 44s
i686-pc-windows-msvc/msvc (Release)	12m 1s
x86_64-pc-windows-msvc/msvc (Debug)	13m 46s
x86_64-pc-windows-msvc/msvc (Release)	11m 48s
aarch64-pc-windows-msvc/msvc (Debug)	10m 56s
aarch64-pc-windows-msvc/msvc (Release)	12m 9s
x86_64-apple-darwin/clang (Debug)	13m 59s
x86_64-apple-darwin/clang (Release)	9m 18s
aarch64-apple-darwin/clang (Debug)	8m 39s
aarch64-apple-darwin/clang (Release)	7m 59s
x86_64-unknown-linux-gnu/gcc (Debug)	9m 51s
x86_64-unknown-linux-gnu/gcc (Release)	7m 40s
aarch64-unknown-linux-gnu/gcc (Debug)	6m 31s
aarch64-unknown-linux-gnu/gcc (Release)	6m 55s
	2h 48m 32s

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