avoid reference count cycle in tuple extraction #9088

Job	Run time
fmt	23s
check-msrv	11m 18s
semver-checks	2m 49s
python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} rust-${{ matrix.rust }}	0s
careful	0s
coverage-windows	6s
test-debug	2m 30s
coverage-macos	6s
clippy/x86_64-apple-darwin/stable	18m 6s
coverage-ubuntu	2m 52s
clippy/x86_64-unknown-linux-gnu/stable	15m 29s
valgrind	0s
clippy/powerpc64le-unknown-linux-gnu/stable	13m 49s
clippy/s390x-unknown-linux-gnu/stable	13m 34s
docsrs	0s
clippy/wasm32-wasi/stable	13m 13s
emscripten	0s
clippy/x86_64-pc-windows-msvc/stable	20m 11s
clippy/i686-pc-windows-msvc/stable	18m 11s
test-version-limits	0s
clippy/x86_64-unknown-linux-gnu/beta	11m 49s
check-feature-powerset	0s
test-cross-compilation ${{ matrix.os }} -> ${{ matrix.target }}	0s
test-cross-compilation-windows	0s
python3.12-x64 ubuntu-latest rust-stable / build	2m 2s
python3.12-x64 windows-latest rust-stable / build	2m 12s
python3.12-x86 windows-latest rust-stable / build	1m 40s
python3.12-x64 macos-latest rust-stable / build	1m 56s
python3.12-x64 ubuntu-latest rust-nightly / build	2m 17s
conclusion	1s
	2h 34m 34s

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