Fix Nightly warnings (#1080) #649

Job	Run time
build (1.60.0, armv7a-none-eabi)	1m 28s
build (1.60.0, thumbv7em-none-eabi)	1m 24s
build (1.60.0, wasm32-unknown-unknown)	1m 24s
cross (aarch64-unknown-linux-gnu, 1.60.0)	1m 58s
cross (aarch64-unknown-linux-gnu, stable)	1m 12s
build (stable, armv7a-none-eabi)	7s
cross (powerpc-unknown-linux-gnu, 1.60.0)	1m 57s
build (stable, thumbv7em-none-eabi)	17s
build (stable, wasm32-unknown-unknown)	20s
cross (powerpc-unknown-linux-gnu, stable)	52s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.60.0, sudo apt update && sudo apt install gcc-mult...	1m 42s
test (i686-unknown-linux-gnu, ubuntu-latest, stable, sudo apt update && sudo apt install gcc-mult...	55s
x86 (x86_64-unknown-linux-gnu, 1.72.0)	21s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0)	1m 22s
x86 (x86_64-unknown-linux-gnu, stable)	30s
test (x86_64-unknown-linux-gnu, ubuntu-latest, stable)	37s
test (x86_64-apple-darwin, macos-latest, 1.60.0)	1m 22s
test (x86_64-apple-darwin, macos-latest, stable)	22s
test (x86_64-pc-windows-msvc, windows-latest, 1.60.0)	32s
test (x86_64-pc-windows-msvc, windows-latest, stable)	50s
minimal-versions / minimal-versions	1m 1s
	20m 33s

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