Merge pull request #1414 from ccotter/async-scope-race #1689

Job	Run time
macos-CPU (MacOS) (clang, Debug)	1m 58s
macos-CPU (MacOS) (clang, Release)	2m 10s
CPU (clang 13, Debug, ubuntu 20.04)	1m 19s
CPU (clang 13, Release, ubuntu 20.04)	1m 13s
CPU (Windows) (msvc, Debug)	4m 55s
CPU (Windows) (msvc, Release)	4m 57s
CPU (gcc 11, Debug, ubuntu 22.04)	1m 12s
CPU (gcc 11, Release, ubuntu 22.04)	1m 3s
CPU (gcc 11, Release, ubuntu 22.04, TSAN)	1m 29s
CPU (gcc 11, Release, ubuntu 22.04, ASAN)	1m 22s
CI (CPU)	1s
CI (CPU) (MacOS)	1s
CI (CPU) (Windows)	1s
	21m 41s

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