fix: atomic cas #671

Job	Run time
test (x86_64-unknown-linux-gnu, stable)	4m 39s
test (x86_64-unknown-linux-gnu, nightly)	5m 4s
test (aarch64-unknown-linux-gnu, stable)	1m 39s
test (aarch64-unknown-linux-gnu, nightly)	2m 56s
test (armv7-unknown-linux-gnueabihf, stable)	1m 43s
test (armv7-unknown-linux-gnueabihf, nightly)	5m 1s
test (riscv64gc-unknown-linux-gnu, stable)	1m 45s
test (riscv64gc-unknown-linux-gnu, nightly)	2m 49s
test (s390x-unknown-linux-gnu, stable)	1m 38s
test (s390x-unknown-linux-gnu, nightly)	2m 53s
test (x86_64-apple-darwin, stable)	1m 12s
test (x86_64-apple-darwin, nightly)	4m 11s
test (aarch64-apple-darwin, stable)	2m 40s
test (aarch64-apple-darwin, nightly)	3m 1s
test (x86_64-pc-windows-gnu, stable)	3m 13s
test (x86_64-pc-windows-gnu, nightly)	3m 21s
test (x86_64-pc-windows-msvc, stable)	4m 31s
test (x86_64-pc-windows-msvc, nightly)	4m 58s
test (i686-pc-windows-gnu, stable)	5m 37s
test (i686-pc-windows-gnu, nightly)	8m 55s
test (i686-pc-windows-msvc, stable)	2m 46s
test (i686-pc-windows-msvc, nightly)	5m 13s
	1h 19m 45s

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