repl: fix getters triggering side effects during completion #1580

Job	Run time
Build slim tarball	1m 21s
aarch64-darwin: with shared libraries	22m 59s
x86_64-darwin: with shared libraries	38m 55s
aarch64-linux: with shared libraries	24m 44s
x86_64-linux: with shared libraries	29m 10s
	1h 57m 9s

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