Rust

read: improve handling of 0 for tombstones #534

Job	Run time
bench	1m 4s
build (ubuntu-latest, stable)	42s
Build fuzz targets	1m 10s
coverage	1m 4s
build (ubuntu-latest, beta)	1m 0s
cross (i686-unknown-linux-gnu)	39s
build (ubuntu-latest, nightly)	44s
doc	20s
cross (powerpc64-unknown-linux-gnu)	47s
build (stable, macOS-latest)	44s
features	2m 57s
msrv	2m 54s
msrv-read	2m 54s
rustfmt	12s
Run `debug_abbrev` fuzz target	5m 7s
Run `debug_aranges` fuzz target	5m 7s
Run `debug_info` fuzz target	5m 6s
Run `debug_line` fuzz target	5m 11s
Run `eh_frame` fuzz target	5m 10s
Run `eh_frame_hdr` fuzz target	5m 5s
	47m 57s

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