repl: fix getters triggering side effects during completion #1621

Job	Run time
Build slim tarball	1m 37s
aarch64-darwin: with shared libraries	1m 4s
x86_64-darwin: with shared libraries	1m 13s
aarch64-linux: with shared libraries	1m 23s
x86_64-linux: with shared libraries	1m 17s
	6m 34s

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