noise: make functions infallible where possible (#366) #289

Job	Run time
check_features (ubuntu-latest)	41s
rustfmt (ubuntu-latest)	3s
check_features (macos-latest)	1m 6s
integration-tests (ubuntu-latest)	2m 17s
rustfmt (macos-latest)	21s
clippy (ubuntu-latest)	47s
integration-tests (macos-latest)	1m 53s
clippy (macos-latest)	1m 8s
test-windows	3m 50s
tests (ubuntu-latest)	2m 12s
tests (macos-latest)	3m 6s
all-systems-go	1s
	17m 25s

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