test: async iife in repl #716

Job	Run time
Build slim tarball	1m 30s
x86_64-linux: with shared libraries	29m 16s
aarch64-linux: with shared libraries	24m 43s
x86_64-darwin: with shared libraries	38m 39s
aarch64-darwin: with shared libraries	22m 2s
	1h 56m 10s

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