Rust

Fixed stacked borrows violation in `dealloc` (fixes #247) (#248) #232

Job	Run time
benches	20s
valgrind	1m 15s
miri	2m 49s
build (stable, --features collections,boxed)	35s
build (beta, --features collections,boxed)	42s
build (1.73.0, --features collections,boxed)	45s
build (nightly, --all-features)	37s
build (stable, --no-default-features)	27s
	7m 30s

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