JIT

fix refleaks #15

Job	Run time
i686-pc-windows-msvc/msvc (Debug)	16m 47s
i686-pc-windows-msvc/msvc (Release)	21m 4s
x86_64-pc-windows-msvc/msvc (Debug)	17m 9s
x86_64-pc-windows-msvc/msvc (Release)	20m 20s
aarch64-pc-windows-msvc/msvc (Debug)	5m 3s
aarch64-pc-windows-msvc/msvc (Release)	5m 22s
x86_64-apple-darwin/clang (Debug)	10m 28s
x86_64-apple-darwin/clang (Release)	12m 53s
aarch64-apple-darwin/clang (Debug)	8m 43s
aarch64-apple-darwin/clang (Release)	12m 44s
x86_64-unknown-linux-gnu/gcc (Debug)	7m 8s
x86_64-unknown-linux-gnu/gcc (Release)	16m 59s
x86_64-unknown-linux-gnu/clang (Debug)	7m 41s
x86_64-unknown-linux-gnu/clang (Release)	13m 15s
aarch64-unknown-linux-gnu/gcc (Debug)	58m 2s
aarch64-unknown-linux-gnu/gcc (Release)	46m 41s
aarch64-unknown-linux-gnu/clang (Debug)	53m 34s
aarch64-unknown-linux-gnu/clang (Release)	30m 51s
	6h 4m 44s

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