Quieten `WouldBlock` errors #73

Job	Run time
Clang Tidy	10s
Clippy	29s
Clippy nightly (optional)	36s
Build+test (stable, ubuntu-latest)	1m 29s
Check for documentation errors	38s
Build+test (beta, ubuntu-latest)	1m 20s
Format	17s
Miri	1m 6s
Build+test (nightly, ubuntu-latest)	1m 21s
Valgrind	1m 8s
	8m 34s

Provide feedback