[Pkg-rust-maintainers] rust-tokio-sync is marked for autoremoval from testing

[Debian testing autoremoval watch]

rust-tokio-sync 0.1.7-2 is marked for autoremoval from testing on 2021-12-03

It is affected by these RC bugs:
998543: rust-tokio-sync: FTBFS: build-dependency not installable: librust-futures-0.1+default-dev (>= 0.1.19-~~)
 https://bugs.debian.org/998543



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