Various fixes too make the CI green #2803

Job	Run time
cargo +1.36 build (futures-{core, io, sink})	1m 36s
cargo +stable build	38s
cargo +beta build	39s
cargo bench	46s
cargo hack check --feature-powerset	2m 1s
cargo +nightly build	34s
cargo minimal-versions build	23s
cargo miri test	1m 57s
cargo build --target thumbv7m-none-eabi	26s
cargo test (ubuntu-latest)	1m 59s
cargo +1.56 build	1m 48s
cargo build --target thumbv6m-none-eabi	24s
cargo test (macos-latest)	2m 0s
cargo test (windows-latest)	1m 49s
cargo clippy	24s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	1m 57s
cargo doc	19s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	2m 0s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	1m 59s
cargo fmt	3s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	1m 59s
cargo test -Z sanitizer=address	1m 59s
cargo test -Z sanitizer=memory	1m 59s
cargo test -Z sanitizer=thread	1m 58s
	31m 37s

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