Rust

read: improve handling of 0 for tombstones #535

Job	Run time
Build fuzz targets	1m 14s
msrv	2m 55s
coverage	1m 6s
bench	1m 5s
build (ubuntu-latest, stable)	42s
cross (i686-unknown-linux-gnu)	45s
build (ubuntu-latest, beta)	51s
doc	27s
cross (powerpc64-unknown-linux-gnu)	56s
features	2m 51s
build (ubuntu-latest, nightly)	44s
build (stable, macOS-latest)	43s
msrv-read	2m 52s
rustfmt	11s
Run `debug_abbrev` fuzz target	5m 8s
Run `debug_aranges` fuzz target	5m 10s
Run `debug_info` fuzz target	5m 11s
Run `debug_line` fuzz target	5m 7s
Run `eh_frame` fuzz target	5m 10s
Run `eh_frame_hdr` fuzz target	5m 6s
	48m 14s

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