Various fixes too make the CI green #2795

Job	Run time
cargo clippy	13s
cargo bench	49s
cargo +1.36 build (futures-{core, io, sink})	1m 32s
cargo +stable build	15s
cargo +beta build	23s
cargo doc	17s
cargo hack check --feature-powerset	17s
cargo fmt	8s
cargo +nightly build	30s
cargo minimal-versions build	19s
cargo miri test	36s
cargo build --target thumbv7m-none-eabi	28s
cargo test -Z sanitizer=address	34s
cargo build --target thumbv6m-none-eabi	25s
cargo test -Z sanitizer=memory	35s
cargo test (ubuntu-latest)	17s
cargo test -Z sanitizer=thread	35s
cargo +1.56 build	2m 4s
cargo test (macos-latest)	20s
cargo test (windows-latest)	40s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	42s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	45s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	53s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	48s
	14m 25s

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