test: async iife in repl #719

Job	Run time
Build slim tarball	1m 39s
aarch64-linux: with shared libraries	23m 49s
x86_64-linux: with shared libraries	28m 28s
x86_64-darwin: with shared libraries	44m 39s
aarch64-darwin: with shared libraries	27m 40s
	2h 6m 15s

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