Various fixes too make the CI green #2802

Job	Run time
cargo +1.36 build (futures-{core, io, sink})	1m 39s
cargo +1.56 build	2m 8s
cargo bench	48s
cargo +stable build	45s
cargo minimal-versions build	24s
cargo +beta build	40s
cargo build --target thumbv7m-none-eabi	27s
cargo +nightly build	35s
cargo hack check --feature-powerset	2m 22s
cargo build --target thumbv6m-none-eabi	27s
cargo clippy	19s
cargo fmt	8s
cargo doc	17s
cargo miri test	2m 46s
cargo test -Z sanitizer=address	2m 46s
cargo test (ubuntu-latest)	2m 44s
cargo test -Z sanitizer=memory	2m 45s
cargo test (macos-latest)	2m 46s
cargo test -Z sanitizer=thread	2m 25s
cargo test (windows-latest)	2m 22s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	2m 45s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	2m 40s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	2m 45s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	2m 40s
	40m 23s

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